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Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Semitransparent organic solar cells  

Science Journals Connector (OSTI)

The organic solar cell technology has attracted great interests due to ... low cost solution process capability. Bulk heterojunction organic solar cells offer a potentially much cheaper alternative way to harness...

Furong Zhu

2014-03-01T23:59:59.000Z

2

Cascade Organic Solar Cells  

Science Journals Connector (OSTI)

Cascade Organic Solar Cells ... Multiple factors control the efficiency of organic solar cells, making it difficult to use single donor or acceptor materials to balance the, often opposing, material properties required to optimize device performance. ... We demonstrate planar organic solar cells consisting of a series of complementary donor materials with cascading exciton energies, incorporated in the following structure: glass/indium-tin-oxide/donor cascade/C60/bathocuproine/Al. ...

Cody W. Schlenker; Vincent S. Barlier; Stephanie W. Chin; Matthew T. Whited; R. Eric McAnally; Stephen R. Forrest; Mark E. Thompson

2011-09-02T23:59:59.000Z

3

Organic solar cell optimizations  

Science Journals Connector (OSTI)

This paper presents recent experimental and theoretical approaches for optimizing organic solar cell efficiencies in both space and energy/time...D/A...) blend film, a corresponding –DBAB- block copolymer film ex...

S. Sun; Z. Fan; Y. Wang; J. Haliburton

2005-03-01T23:59:59.000Z

4

Organic Solar Cells — A Survey  

Science Journals Connector (OSTI)

The objective of this study was to examine in some detail the question of efficient organic solar cells. The scientific-technical situation concerning organic solar cells is highly confusing and unsatisfactory. I...

Dieter Bonnet; Jürgen Volkheimer

1991-01-01T23:59:59.000Z

5

Introduction to Organic Solar Cells  

Science Journals Connector (OSTI)

Organic solar cells (OSCs) have attracted strong attention in ... the basics of OSCs. The basics of organic semiconductors are first described. We then provide...

Dixon D. S. Fung; Wallace C. H. Choy

2013-01-01T23:59:59.000Z

6

Fabrication and Characterization of Organic Solar Cells  

E-Print Network [OSTI]

and  characterization of organic solar cells.  Advanced D, Meissner D.  Organic Solar?Cells.  Advanced Materials.  tin  oxide  for  organic solar cell.  Electr Eng Jpn.  2006 

Yengel, Emre

2010-01-01T23:59:59.000Z

7

Organic Solar Cells and Their Nanostructural Improvement  

Science Journals Connector (OSTI)

Organic solar cells comprised of organic semiconductors have attracted considerable attention in the ... photonics and electronics during the last decade. Organic semiconductors are a less expensive alternative t...

Serap Günes

2011-01-01T23:59:59.000Z

8

17 - Organic solar cells (OSCs)  

Science Journals Connector (OSTI)

Abstract The organic solar cell (OSC) is the only solar cell technology that fully addresses the challenges of manufacturing on a scale corresponding to an energy production capacity of 1 \\{GWpeak\\} per day based solely on abundant elements. This ability arises through the use of printing techniques and photoactive layers comprising carbon-based conjugated polymer materials. The technology is briefly reviewed in this chapter by describing the common device structures and materials. The second half of the chapter gives an overview on suitable roll-to-roll (R2R) processing techniques for the fabrication of OSCs. Finally some demonstration projects and future trends are illustrated.

M. Hösel; D. Angmo; F.C. Krebs

2013-01-01T23:59:59.000Z

9

Decohesion Kinetics in Polymer Organic Solar Cells  

Science Journals Connector (OSTI)

Decohesion Kinetics in Polymer Organic Solar Cells ... We investigate the role of molecular weight (MW) of the photoactive polymer poly(3-hexylthiophene) (P3HT) on the temperature-dependent decohesion kinetics of bulk heterojunction (BHJ) organic solar cells (OSCs). ... fullerenes; solar cells; thin films; fracture; polymer ...

Christopher Bruner; Fernando Novoa; Stephanie Dupont; Reinhold Dauskardt

2014-11-04T23:59:59.000Z

10

Light Management Toward Efficient Organic Solar Cells  

Science Journals Connector (OSTI)

Light management methods for organic solar cells (OSCs) are presented: (i) thin-film optic method utilizing the inherent asymmetry of semitransparent OSCs; (ii) V-groove-based...

Yoo, Seunghyup; Han, Donggeon; Kim, Hoyeon; Cho, Changsoon; Lee, Jung-Yong

11

Fabrication and Characterization of Organic Solar Cells.  

E-Print Network [OSTI]

??Bulk heterojunction organic solar cells have recently drawn tremendous attention because of their technological advantages for actualization of large-area and cost effective fabrication. Two important… (more)

Yengel, Emre

2010-01-01T23:59:59.000Z

12

Optical Optimization of Organic Solar Cells  

Science Journals Connector (OSTI)

The electromagnetic field distribution inside multilayer organic solar cells is simulated and optimized. The relative importance of optical, electrical and morphological properties...

Monestier, Florent; Simon, Jean-Jacques; Torchio, Philippe; Escoubas, Ludovic; Flory, François; El Amrani, Aumeur; Moliton, André; Ratier, Bernard; Cathelinaud, Michel; Defranoux, Christophe

13

Solar tree”: Exploring new form factors of organic solar cells  

Science Journals Connector (OSTI)

Abstract Organic solar cells have great potential as a clean and renewable solar energy conversion system, due to their low cost materials, ease of production, and lack of harmful emissions. The rapid improvement in organic solar cell performance in recent years has triggered significant interests in developing organic solar cells for commercial applications. Harnessing the unique set of characteristics of organic solar cells, here we demonstrate a new form factor for organic solar cells, a “solar tree” or an electricity-generating artificial tree with organic solar cells as leaves. We first fabricated polymer:fullerene based organic solar cells on flexible plastic substrates that show similar performance to devices on rigid glass substrates using the inverted device structure. Large-area flexible devices were fabricated and cut into palm leaf shapes with an active device area of 6.5 cm2 using a steel rule die. 12 leaf-shaped organic solar cells were then assembled to form a prototype “solar palm tree”. Two different wiring configurations among the devices provided different power delivery modes: a low-voltage, high-current “fan mode” and a high voltage, low-current “LED mode”.

Weiran Cao; Zhifeng Li; Yixing Yang; Ying Zheng; Weijie Yu; Rimza Afzal; Jiangeng Xue

2014-01-01T23:59:59.000Z

14

New Morphological Paradigm Uncovered in Organic Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

New Morphological Paradigm Uncovered in Organic Solar Cells Print Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive...

15

New Morphological Paradigm Uncovered in Organic Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Paradigm Uncovered in Organic Solar Cells Print Wednesday, 27 April 2011 00:00 Organic solar cells are made of light, flexible, renewable materials; they require simple and...

16

Organic p-i-n solar cells  

Science Journals Connector (OSTI)

We introduce a p-i-n-type heterojunction architecture for organic solar cells where the active region is sandwiched between...p-i-n means here a layer sequence in the form p-doped layer, intrinsic layer an...

B. Maennig; J. Drechsel; D. Gebeyehu; P. Simon; F. Kozlowski…

2004-06-01T23:59:59.000Z

17

Organic Solar Cells: An Overview Focusing on Active Layer Morphology  

Science Journals Connector (OSTI)

Solar cells constructed of organic materials are becoming increasingly efficient due to ... concept. This review provides an overview of organic solar cells. Topics covered include: a brief history of organic solar

Travis L. Benanti; D. Venkataraman

2006-01-01T23:59:59.000Z

18

Organic solar cell degradation probed by the nanosecond photoresponse  

Science Journals Connector (OSTI)

We measure the transient electrical response of small organic solar cells illuminated with nanosecond light pulses during degradation....

S. W. Kettlitz; S. Valouch; U. Lemmer

2010-06-01T23:59:59.000Z

19

Dielectric nanostructures for broadband light trapping in organic solar cells  

E-Print Network [OSTI]

Dielectric nanostructures for broadband light trapping in organic solar cells Aaswath Raman, Zongfu light trapping configuration for thin-film solar cells," Appl. Phys. Lett. 91, 243501 (2007). 8. M@stanford.edu Abstract: Organic bulk heterojunction solar cells are a promising candidate for low-cost next

Fan, Shanhui

20

Sensitized energy transfer for organic solar cells, optical solar concentrators, and solar pumped lasers  

E-Print Network [OSTI]

The separation of chromophore absorption and excitonic processes, such as singlet exciton fission and photoluminescence, offers several advantages to the design of organic solar cells and luminescent solar concentrators ...

Reusswig, Philip David

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

P3HT:PCBM Bulk Heterojunction Organic Solar Cell.  

E-Print Network [OSTI]

?? Organic solar cells have emerged as an important cheap photovoltaic technology. In this thesis work, a study of P3HT:PCBM heterojunction solar cells was presented.… (more)

Liu, Jiang

2008-01-01T23:59:59.000Z

22

Organic Solar Cells with Inverted and Tandem Structures  

Science Journals Connector (OSTI)

During the past decade, organic solar cells have attracted great attention due to their ... Although the technologies of small molecule and polymer solar cells have advanced significantly, the efficiency and stab...

De Wei Zhao; Aung Ko Ko Kyaw; Xiao Wei Sun

2011-01-01T23:59:59.000Z

23

Design Rules for Efficient Organic Solar Cells  

Science Journals Connector (OSTI)

There has been an intensive search for cost-effective photovoltaics since the development of the first solar cells in the 1950s [1-3...]. Among all the alternative technologies to silicon-based pn-junction solar

Z. Zhu; D. Mühlbacher; M. Morana; M. Koppe…

2009-01-01T23:59:59.000Z

24

Influence of organic salt concentration on the performance of bulk heterojunction organic solar cell  

Science Journals Connector (OSTI)

The effect of organic salt on the performance of bulk heterojunction organic solar cell was investigated by varying the concentration of...6). Organic solar cells based on TBAPF6-blended poly[2-methoxy-5-(2-ethyl...

Nasehah Syamin Sabri; Chi Chin Yap…

2013-07-01T23:59:59.000Z

25

Fabrication and Characterization of Organic Solar Cells  

E-Print Network [OSTI]

processable polymer photovoltaic cells by self?organization Photodiodes,  and  Photovoltaic  Cells.   Applied Physics F,  Heeger  AJ.   Polymer  Photovoltaic  Cells  ?  Enhanced 

Yengel, Emre

2010-01-01T23:59:59.000Z

26

Photonic Crystals for Improving Organic Solar Cell Efficiency  

Science Journals Connector (OSTI)

An improvement of the organic solar cells efficiency is theoretically demonstrated by nanostructuring the active layer in the shape of a photonic crystal. An original process...

Duché, David; Escoubas, Ludovic; Simon, Jean-Jacques; Torchio, Philippe; Le Rouzo, Judikael; Vervisch, Wilfried; Flory, François; Labeyrie, Antoine; Roumiguières, Jean-Louis

27

Progress on nanopatterned front electrodes for organic solar cells  

Science Journals Connector (OSTI)

We present our recent progress in the development of nanophotonic front electrodes for improved light management in organic solar cell. Experimental results and 3D electromagnetic...

Paetzold, Ulrich W; Smeets, Michael; Hadipour, Afshin; Cheyns, David

28

Structural Characterization of the Active Layer in Organic Solar Cells.  

E-Print Network [OSTI]

??Organic solar cells belong to a class of devices where the morphology of the active layer has a large impact on device performance. However, characterization… (more)

Kozub, Derek

2011-01-01T23:59:59.000Z

29

Dielectric nanostructures for broadband light trapping in organic solar cells  

Science Journals Connector (OSTI)

We investigate broadband light trapping using only dielectric components to improve organic solar cell efficiency. We show that substantial absorption and photocurrent enhancement is...

Raman, Aaswath; Yu, Zongfu; Fan, Shanhui

30

Dielectric nanostructures for broadband light trapping in organic solar cells  

Science Journals Connector (OSTI)

Organic bulk heterojunction solar cells are a promising candidate for low-cost next-generation photovoltaic systems. However, carrier extraction limitations necessitate thin active...

Raman, Aaswath; Yu, Zongfu; Fan, Shanhui

2011-01-01T23:59:59.000Z

31

Study of organic solar cells with stacked bulk heterojunction structure  

Science Journals Connector (OSTI)

Organic solar cells with stacked bulk heterojunction(BHJ) are investigated ... as inter-layer to connect the upper BHJ cell and the lower cell. The structures are ITO/PEDOT:PSS/MEH...V OC) of a st...

Xin-fang Zhang; Zheng Xu; Su-ling Zhao; Fu-jun Zhang; Yan Li…

2008-07-01T23:59:59.000Z

32

Fabrication and Characterization of Organic Solar Cells  

E-Print Network [OSTI]

conversion efficiency (PCE) by %16 and %30, respectively.it is demonstrated that the PCE of the graphene based solarpower conversion efficiency (PCE). PCE of a solar cell is

Yengel, Emre

2010-01-01T23:59:59.000Z

33

Non-fullerene acceptors for organic solar cells  

Science Journals Connector (OSTI)

Solar cells based on organic semiconductor molecules are a promising alternative to ... simple production, and good mechanical properties. Effective organic photocells are based on a heterojunction using an activ...

V. A. Trukhanov; D. Yu. Paraschuk

2014-09-01T23:59:59.000Z

34

Semiconductor Aspects of Organic Bulk Heterojunction Solar Cells  

Science Journals Connector (OSTI)

During the last few years organic solar cells have been discussed as a promising alternative to inorganic semiconductors for renewable energy production. These organic photovoltaic devices offer the possibility o...

Christoph J. Brabec

2003-01-01T23:59:59.000Z

35

Interfacial processes in small molecule organic solar cells  

Science Journals Connector (OSTI)

This paper presents an overview of the recent progress of small molecule organic solar cells mainly based on the previous works of ... mainly focus on the interfacial processes in the cells. The dissociation of e...

WenBin Li; QunLiang Song; XiaoYu Sun…

2010-02-01T23:59:59.000Z

36

High-Performance Nanostructured Inorganic?Organic Heterojunction Solar Cells  

Science Journals Connector (OSTI)

High-Performance Nanostructured Inorganic?Organic Heterojunction Solar Cells ... Although single-crystalline Si-based solar cells are successfully used to harvest solar energy, inexpensive production of photovoltaic (PV) devices at a cost comparable to the energy production cost of fossil fuels has become a critical issue to meet the global energy crisis. ... The photocurrent output of a solar cell based on exciton dissociation from sensitized solar cells depends on the quantum efficiencies of light harvesting (?lh), electron injection (?inj), and electron collection (?cc), which is determined by the competition between recombination and charge collection. ...

Jeong Ah Chang; Jae Hui Rhee; Sang Hyuk Im; Yong Hui Lee; Hi-jung Kim; Sang Il Seok; Md. K. Nazeeruddin; Michael Gratzel

2010-05-28T23:59:59.000Z

37

The Design of Organic Polymers and Small Molecules to Improve the Efficiency of Excitonic Solar Cells  

E-Print Network [OSTI]

bulk heterojunction organic solar cells, blends of a p-typecells, including organic solar cells and dye-sensitizedin a bilayer organic solar cell. At top is a cross section

Armstrong, Paul Barber

2010-01-01T23:59:59.000Z

38

Influence of substrate refractive index and antireflection coating on excitons generation in organic solar cell  

Science Journals Connector (OSTI)

Solar cells are manufactured with the application of inorganic semiconductors and with the application of organic semiconductors. Organic solar cells have presently lower efficiency than their inorganic...2010).

Ewa Gondek

2014-01-01T23:59:59.000Z

39

Vertical morphology in solution-processed organic solar cells  

Science Journals Connector (OSTI)

Motivated by a report of an all-solution processed P3HT/PCBM ‘bilayer’ organic solar cell, we have investigated the vertical morphology by using a combination of...

Lee, Kwan H; Schwenn, Paul E; Smith, Arthur R G; Cavaye, Hamish; Shaw, Paul E; James, Michael; Krueger, Karsten B; Gentle, Ian R; Meredith, Paul; Burn, Paul L

40

Process Technology and Advanced Concepts: Organic Solar Cells (Fact Sheet)  

SciTech Connect (OSTI)

Capabilities fact sheet for the National Center for Photovoltaics: Process Technology and Advanced Concepts: Organic Solar Cell that includes scope, core competencies and capabilities, and contact/web information.

Not Available

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Light Incoupling and Optical Optimisation of Organic Solar Cells  

Science Journals Connector (OSTI)

Due to the thin film nature of organic solar cells, light-trapping and interference effects play a significant role. We discuss here the utilisation of these effects in optimisation...

Meiß, Jan; Schueppel, Rico; Timmreck, Ronny; Furno, Mauro; Uhrich, Christian; Sonntag, Stefan; Gnehr, Wolf-Michael; Pfeiffer, Martin; Leo, Karl; Riede, Moritz

42

Optical design of organic solar cell with hybrid plasmonic system  

Science Journals Connector (OSTI)

We propose a novel optical design of organic solar cell with a hybrid plasmonic system, which comprises a plasmonic cavity coupled with a dielectric core-metal shell nanosphere. From a...

Sha, Wei E I; Choy, Wallace C H; Chen, Yongpin P; Chew, Weng Cho

2011-01-01T23:59:59.000Z

43

Graphene Quantum Dot-Based Organic Solar Cells  

Science Journals Connector (OSTI)

Current research in organic photovoltaic (OPV) is largely focused on ... they are promising for efficient light harvesting in solar cells. Keeping this in view, we present ... so far for the application of GQDs i...

Vinay Gupta; Tanvi Upreti; Suresh Chand

2014-01-01T23:59:59.000Z

44

Organic Solar Cells: Absolute Measurement of Domain Composition...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

00:00 This front cover represents the morphology and resulting device dynamics in organic solar cell blend films of PTB7 and PC71BM, as revealed by combined resonant x-ray...

45

Experimental test for geminate recombination applied to organic solar cells  

Science Journals Connector (OSTI)

We show that a clear experimental test can distinguish between geminate and nongeminate recombination in low mobility semiconductors. For the particular case of the organic solar cell, the relative contribution of geminate recombination can be determined by measuring transient photoconductivity versus applied voltage. Measurements carried out at room temperature and 200 K on bulk heterojunction organic solar cells fabricated with two different semiconducting polymers show that neither exhibits significant geminate recombination.

R. A. Street; Sarah Cowan; A. J. Heeger

2010-09-01T23:59:59.000Z

46

Fabrication and Characterization of Organic Solar Cells  

E-Print Network [OSTI]

logistical problems associated with solar energy. One of theor environmental problems. 1.2 Solar Energy As being thephotovoltaic solar energy all suffer from the problem of not

Yengel, Emre

2010-01-01T23:59:59.000Z

47

Plasmonic effect of gold nanoparticles in organic solar cells  

Science Journals Connector (OSTI)

Abstract Light trapping, due to the embedding of metallic nanoparticles, has been shown to be beneficial for a better photoabsorption in organic solar cells. Researchers in plasmonics and in the organic photovoltaics fields are working together to improve the absorption of sunlight and the photon–electron coupling to boost the performance of the devices. Recent advances in the field of plasmonics for organic solar cells focus on the incorporation of gold nanoparticles. This article reviews the different methods to produce and embed gold nanoparticles into organic solar cells. In particular, concentration, size and geometry of gold nanoparticles are key factors that directly influence the light absorption in the devices. It is shown that a careful choice of size, concentration and location of gold nanoparticles in the device result in an enhancement of the power conversion efficiencies when compared to standard organic solar cell devices. Our latest results on gold nanoparticles embedded in on organic solar cell devices are included. We demonstrate that embedded gold nanoparticles, created by depositing and annealing a gold film on transparent electrode, generate a plasmonic effect which can be exploited to increase the power conversion efficiency of a bulk heterojunction solar cell up to 10%.

Marco Notarianni; Kristy Vernon; Alison Chou; Muhsen Aljada; Jinzhang Liu; Nunzio Motta

2014-01-01T23:59:59.000Z

48

Fabrication and Characterization of Organic Solar Cells  

E-Print Network [OSTI]

Sources  .1  1.2 Solar Energy ..sources available are largely covered by hydropower, biomass energy, solar energy,Solar Energy As being the largest among carbon-neutral energy source,

Yengel, Emre

2010-01-01T23:59:59.000Z

49

Nano-structured Organic-Metal Interface for High Efficiency Organic Solar Cells  

Science Journals Connector (OSTI)

High bimolecular recombination has been identified as a performance limiting parameter in organic solar cells. To counter this issue, we introduce a structured-junction device...

Pandey, Ajay K; Aljada, Muhsen; Velusamy, M; Burn, Paul L; Meredith, Paul

50

Organic Solar Cells: Absolute Measurement of Domain Composition and  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Organic Solar Cells: Absolute Organic Solar Cells: Absolute Measurement of Domain Composition and Nanoscale Size Distribution Explains Performance in Solar Cells Organic Solar Cells: Absolute Measurement of Domain Composition and Nanoscale Size Distribution Explains Performance in Solar Cells Print Tuesday, 22 January 2013 00:00 This front cover represents the morphology and resulting device dynamics in organic solar cell blend films of PTB7 and PC71BM, as revealed by combined resonant x-ray scattering and microscopy done at the Advanced Light Source. Harald Ade and co-workers find that the fullerene molecules (red) are miscible in the polymer (blue) up to 30 wt.%, above which they begin to agglomerate (bottom). This agglomeration is important for the optoelectronic processes within the device, but the agglomerates must be kept to small sizes by the solvent processing additive diiodooctane (DIO). Correlation of this morphology with the spectrally resolved quantum efficiency shows that the yellow excitons created upon photoabsorption must arrive at the agglomerate interface for charge separation to occur. The blue electrons and green holes can then percolate through appropriate molecules in the mixed matrix to the electrodes for harvesting of electrical energy. Article Link (PDF)

51

New Morphological Paradigm Uncovered in Organic Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

New Morphological Paradigm New Morphological Paradigm Uncovered in Organic Solar Cells New Morphological Paradigm Uncovered in Organic Solar Cells Print Wednesday, 27 April 2011 00:00 Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive processing steps and could produce an economically competitive and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models describing critical device functions such as charge separation and transport often depend on simplistic morphological assumptions, including discrete interfaces between pure electron donor and acceptor materials. In contrast, recent spectroscopy and scattering studies conducted by North Carolina State University and Cambridge University researchers at ALS Beamlines 5.3.2 and 7.3.3 found a substantial amount of molecular mixing between model materials (polymers and fullerenes) currently used in bulk heterojunction (BHJ) organic solar cells. This suggests that the amorphous portions of these devices do not have pure domains, and the paradigm of device operation may need to be refined to accommodate this newly discovered complexity.

52

New Morphological Paradigm Uncovered in Organic Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

New Morphological Paradigm Uncovered in Organic Solar Cells Print New Morphological Paradigm Uncovered in Organic Solar Cells Print Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive processing steps and could produce an economically competitive and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models describing critical device functions such as charge separation and transport often depend on simplistic morphological assumptions, including discrete interfaces between pure electron donor and acceptor materials. In contrast, recent spectroscopy and scattering studies conducted by North Carolina State University and Cambridge University researchers at ALS Beamlines 5.3.2 and 7.3.3 found a substantial amount of molecular mixing between model materials (polymers and fullerenes) currently used in bulk heterojunction (BHJ) organic solar cells. This suggests that the amorphous portions of these devices do not have pure domains, and the paradigm of device operation may need to be refined to accommodate this newly discovered complexity.

53

New Morphological Paradigm Uncovered in Organic Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

New Morphological Paradigm Uncovered in Organic Solar Cells Print New Morphological Paradigm Uncovered in Organic Solar Cells Print Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive processing steps and could produce an economically competitive and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models describing critical device functions such as charge separation and transport often depend on simplistic morphological assumptions, including discrete interfaces between pure electron donor and acceptor materials. In contrast, recent spectroscopy and scattering studies conducted by North Carolina State University and Cambridge University researchers at ALS Beamlines 5.3.2 and 7.3.3 found a substantial amount of molecular mixing between model materials (polymers and fullerenes) currently used in bulk heterojunction (BHJ) organic solar cells. This suggests that the amorphous portions of these devices do not have pure domains, and the paradigm of device operation may need to be refined to accommodate this newly discovered complexity.

54

New Morphological Paradigm Uncovered in Organic Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

New Morphological Paradigm Uncovered in Organic Solar Cells Print New Morphological Paradigm Uncovered in Organic Solar Cells Print Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive processing steps and could produce an economically competitive and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models describing critical device functions such as charge separation and transport often depend on simplistic morphological assumptions, including discrete interfaces between pure electron donor and acceptor materials. In contrast, recent spectroscopy and scattering studies conducted by North Carolina State University and Cambridge University researchers at ALS Beamlines 5.3.2 and 7.3.3 found a substantial amount of molecular mixing between model materials (polymers and fullerenes) currently used in bulk heterojunction (BHJ) organic solar cells. This suggests that the amorphous portions of these devices do not have pure domains, and the paradigm of device operation may need to be refined to accommodate this newly discovered complexity.

55

A model to determine financial indicators for organic solar cells  

Science Journals Connector (OSTI)

Organic solar cells are an emerging photovoltaic technology that is inexpensive and easy to manufacture, despite low efficiency and stability. A model, named TEEOS (Technical and Economic Evaluator for Organic Solar), is presented that evaluates organic solar cells for various solar energy applications in different geographic locations, in terms of two financial indicators, payback period and net present value (NPV). TEEOS uses SMARTS2 software to estimate broadband (280–4000 nm) spectral irradiance data and with the use of a cloud modification factor, predicts hourly irradiation in the absence of actual broadband irradiance data, which is scarce for most urban locations. By using the avoided cost of electricity, annual savings are calculated which produce the financial indicators. It is hoped that these financial indicators can help guide certain technical decisions regarding the direction of research for organic solar cells, for example, increasing efficiency or increasing the absorptive wavelength range. A sample calculation using solar hats is shown to be uneconomical, but a good example of large-scale organic PV production.

Colin Powell; Timothy Bender; Yuri Lawryshyn

2009-01-01T23:59:59.000Z

56

A model to determine financial indicators for organic solar cells  

SciTech Connect (OSTI)

Organic solar cells are an emerging photovoltaic technology that is inexpensive and easy to manufacture, despite low efficiency and stability. A model, named TEEOS (Technical and Economic Evaluator for Organic Solar), is presented that evaluates organic solar cells for various solar energy applications in different geographic locations, in terms of two financial indicators, payback period and net present value (NPV). TEEOS uses SMARTS2 software to estimate broadband (280-4000 nm) spectral irradiance data and with the use of a cloud modification factor, predicts hourly irradiation in the absence of actual broadband irradiance data, which is scarce for most urban locations. By using the avoided cost of electricity, annual savings are calculated which produce the financial indicators. It is hoped that these financial indicators can help guide certain technical decisions regarding the direction of research for organic solar cells, for example, increasing efficiency or increasing the absorptive wavelength range. A sample calculation using solar hats is shown to be uneconomical, but a good example of large-scale organic PV production. (author)

Powell, Colin; Bender, Timothy; Lawryshyn, Yuri [Department of Chemical Engineering and Applied Chemistry, Faculty of Engineering and Applied Science, University of Toronto, 200 College Street, Toronto, Ont. (Canada)

2009-11-15T23:59:59.000Z

57

The Design of Organic Polymers and Small Molecules to Improve the Efficiency of Excitonic Solar Cells  

E-Print Network [OSTI]

J. The physics of solar cells; Imperial College Press,for organic polymer solar cells investigated to date. TheHarvesting in Dye-Sensitized Solar Cells Through the Use of

Armstrong, Paul Barber

2010-01-01T23:59:59.000Z

58

Solvent effects on gravure-printed organic layers of nanoscale thickness for organic solar cells  

Science Journals Connector (OSTI)

The effects of different solvents on the fabrication of organic photovoltaic cells by gravure printing are reported. Polymer bulk heterojunction solar cells were fabricated with ITO/PEDOT: PSS/P3HT ... of solvent...

Jiyeon Lee; Aran Kim; Sung Min Cho; Heeyeop Chae

2012-03-01T23:59:59.000Z

59

Organic—inorganic hybrid solar cells: A comparative review  

Science Journals Connector (OSTI)

Organic materials have recently become of great interest for photovoltaic applications, due to their potential to utilise high throughput, solution phase processing, which will lead to low cost electricity production. Hybrid solar cells combine organic and inorganic materials with the aim of utilising the low cost cell production of organic photovoltaics (OPV) as well as obtaining other advantages, such as tuneable absorption spectra, from the inorganic component. Whilst hybrid solar cells have the potential to achieve high power conversion efficiencies (PCE), currently obtained efficiencies are quite low. The design of the inorganic material used as the electron acceptor in hybrid solar cells, particularly the electronic structure, is crucial to the performance of the device. There exists an optimal electronic structure design for an inorganic acceptor. To date, four major material types have been investigated, being cadmium compounds, silicon, metal oxide nanoparticles and low band gap nanoparticles. Currently, Cadmium Sulfide (CdS) quantum dots represent the state of the art, yielding a PCE of greater than 4%. This review compares the electronic structure of these materials with the optimal design components of an inorganic material and also explores possible limitations to the PCE of these devices, such as nanomorphology control and nanoparticle surface chemistry. This report provides the reader with a concise synthesis of the current state of the art for bulk heterojunction organic—inorganic hybrid solar cells. Additionally, it highlights key research areas which require attention to allow for the commercialisation of this technology.

Matthew Wright; Ashraf Uddin

2012-01-01T23:59:59.000Z

60

Plasmonic Oligomers as Effective Red Light Scatterers to Enhance the Performance of Organic Solar Cells  

Science Journals Connector (OSTI)

Efficient creation of excitons in organic solar cells requires a large optical path of light through the active material. However, organic cells feature very low charge mobility...

Pastorelli, Francesco; Bidault, Sebastien; Martorell, Jordi; Bonod, Nicolas

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
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61

Ultrathin, high-efficiency, broad-band, omni-acceptance, organic solar cells enhanced by  

E-Print Network [OSTI]

: Three of central challenges in solar cells are high light coupling into solar cell, high light trappingUltrathin, high-efficiency, broad-band, omni- acceptance, organic solar cells enhanced by plasmonic and demonstration of a new ultra-thin high- efficiency organic solar cell (SC), termed "plasmonic cavity

62

D-A-D structured organic molecules with diketopyrrolopyrrole acceptor unit for solution-processed organic solar cells  

Science Journals Connector (OSTI)

...for solution-processed organic solar cells Jing Zhang Chang He Zhi-Guo Zhang...in solution-processed organic solar cells (OSCs). The molecules show broad...illumination of AM1.5, 100cm2. organic solar cells|solution-processable organic...

2014-01-01T23:59:59.000Z

63

Flexible organic solar cells including efficiency enhancing grating structures  

Science Journals Connector (OSTI)

In this work, a new method for the fabrication of organic solar cells containing functional light-trapping nanostructures on flexible substrates is presented. Polyimide is spin-coated on silicon support substrates, enabling standard micro- and nanotechnology fabrication techniques, such as photolithography and electron-beam lithography, besides the steps required for the bulk-heterojunction organic solar cell fabrication. After the production steps, the solar cells on polyimide are peeled off the silicon support substrates, resulting in flexible devices containing nanostructures for light absorption enhancement. Since the solar cells avoid using brittle electrodes, the performance of the flexible devices is not affected by the peeling process. We have investigated three different nanostructured grating designs and conclude that gratings with a 500?nm pitch distance have the highest light-trapping efficiency for the selected active layer material (P3HT:PCBM), resulting in an enhancement of about 34% on the solar cell efficiency. The presented method can be applied to a large variety of flexible nanostructured devices in future applications.

Roana Melina de Oliveira Hansen; Yinghui Liu; Morten Madsen; Horst-G?nter Rubahn

2013-01-01T23:59:59.000Z

64

Comment on “Interface state recombination in organic solar cells  

Science Journals Connector (OSTI)

In a recent paper, Street et al. [Phys. Rev. B 81, 205307 (2010)] propose first-order recombination due to interface states to be the dominant loss mechanism in organic bulk heterojunction solar cells, based on steady-state current-voltage characteristics. By applying macroscopic simulations, we found that under typical solar-cell conditions, monomolecular or bimolecular recombination cannot be inferred from the slope of the light-intensity-dependent photocurrent. In addition, we discuss the validity of calculating a mobility-lifetime product from steady-state measurements. We conclude that the experimental technique applied by Street et al. is not sufficient to unambiguously determine the loss mechanism.

Carsten Deibel and Alexander Wagenpfahl

2010-11-02T23:59:59.000Z

65

Using a Financial Model to Determine Technical Objectives for Organic Solar Cells.  

E-Print Network [OSTI]

??Organic solar cells (OSCs) are of interest because the technology offers a significant opportunity to reduce the overall costs of solar energy. OSCs can be… (more)

Powell, Colin

2010-01-01T23:59:59.000Z

66

Organic Solar Cells as Polymer Waveguide Integrated Photodetectors  

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Abstract We report on the integration of an organic photodetector into a polymer waveguide. The photodetector is based on thin film organic solar cells using Zinc phtalocyanine and Fulleren C60 (ZnPc:C60) as photoactive material. This approach comprises the potential for an ease of production of active electro optical components on passive optical elements. By using organic materials low cost production of integrated devices on uneven surfaces becomes possible. In first experiments we show the potential of ZnPc:C60 solar cells as photodetectors at a wavelength of 635 nm. We perform simulations of this detectors put on the top surface of a polymer multi-mode waveguide. The simulation shows how light, which is guided through the waveguide can be efficiently absorbed by the photodetector without complex coupling structures.

Torsten Otto; Torsten Rabe; Sebastian Döring; Wolfgang Kowalsky

2014-01-01T23:59:59.000Z

67

Estimating the manufacturing cost of purely organic solar cells Joseph Kalowekamo 1  

E-Print Network [OSTI]

Estimating the manufacturing cost of purely organic solar cells Joseph Kalowekamo 1 , Erin Baker Abstract In this paper we estimate the manufacturing cost of purely organic solar cells. We find a very organic solar cells will range between $50 and $140/m2 . Under the assumption of 5% efficiency, this leads

Massachusetts at Amherst, University of

68

Plasmonic backcontact grating for P3HT:PCBM organic solar cells enabling strong optical  

E-Print Network [OSTI]

Plasmonic backcontact grating for P3HT:PCBM organic solar cells enabling strong optical absorption organic solar cells we propose and demonstrate numerically plasmonic backcontact grating architectures. Simon, L. Escoubas, P. Torchio, J. L. Rouzo, and S. Vedraine, "Light harvesting in organic solar cells

Demir, Hilmi Volkan

69

Quantum Solar Energy Conversion and Application to Organic Solar Cells  

Science Journals Connector (OSTI)

When studying the limits of solar energy conversion, either by thermal or quantum processes, the sun has traditionally been treated as a blackbody (thermal equilibrium) radiator with surface temperature 5 800 ...

Gottfried H. Bauer; Peter Würfel

2003-01-01T23:59:59.000Z

70

SIMULATION OF GEOMETRY AND SHADOW EFFECTS IN 3D ORGANIC POLYMER SOLAR CELLS  

E-Print Network [OSTI]

levels of Solar panels and new production capacity is driving solar PV prices lower and thereby, bringingSIMULATION OF GEOMETRY AND SHADOW EFFECTS IN 3D ORGANIC POLYMER SOLAR CELLS OF THE THESIS Simulation of Geometry and Shadow Effects in 3D Organic Polymer Solar Cells by Mihir Prakashbhai

Kassegne, Samuel Kinde

71

Work Function Homogeneity of Monolayer Passivated ITO Surfaces for Organic Solar Cells  

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The ITO transparent electrode surface is passivated either by organic quinoline molecules or by ions of periodic and phosphoric acids for organic solar cells. Passivated surfaces are...

Rusu, Marin; Johnev, Boyan; Streicher, Ferdinand; Barreau, Nicolas; Vogel, Mirko; Glatzel, Thilo; Sadewasser, Sascha; Lux-Steiner, Martha Ch; Fostiropoulos, Konstantinos

72

Thermal stability of organic solar cells: the decay in photocurrent linked with changes in active layer morphology  

Science Journals Connector (OSTI)

Nowadays bulk heterojunction polymer:fullerene (PCBM) solar cells reach efficiencies of 5% through the ... . One of the general bottlenecks of organic solar cells is their poor stability. Organic solar cells have...

S. Bertho; I. Haeldermans; A. Swinnen…

2008-01-01T23:59:59.000Z

73

Solar energy-conversion processes in organic solar cells  

Science Journals Connector (OSTI)

Organic semiconducting materials have demonstrated attractive light-absorption and photocurrent-generation functions due to their delocalized ? electrons as well as intra-molecular and inter-molecular charge sepa...

Zhihua Xu; Huidong Zang; Bin Hu

2008-09-01T23:59:59.000Z

74

Recent progress in degradation and stabilization of organic solar cells  

SciTech Connect (OSTI)

Stability is of paramount importance in organic semiconductor devices, especially in organic solar cells (OSCs). Serious degradation in air limits wide applications of these flexible, light-weight and low-cost power-generation devices. Studying the stability of organic solar cells will help us understand degradation mechanisms and further improve the stability of these devices. There are many investigations into the efficiency and stability of OSCs. The efficiency and stability of devices even of the same photoactive materials are scattered in different papers. In particular, the extrinsic degradation that mainly occurs near the interface between the organic layer and the cathode is a major stability concern. In the past few years, researchers have developed many new cathodes and cathode buffer layers, some of which have astonishingly improved the stability of OSCs. In this review article, we discuss the recent developments of these materials and summarize recent progresses in the study of the degradation/stability of OSCs, with emphasis on the extrinsic degradation/stability that is related to the intrusion of oxygen and water. The review provides detailed insight into the current status of research on the stability of OSCs and seeks to facilitate the development of highly-efficient OSCs with enhanced stability.

Cao, Huanqi; He, Weidong; Mao, Yiwu; Lin, Xiao; Ishikawa, Ken; Dickerson, James H.; Hess, Wayne P.

2014-10-15T23:59:59.000Z

75

Effect of Contacts in Organic Bulk Heterojunction Solar Cells  

Science Journals Connector (OSTI)

Interfaces play an important role in emerging organic electronic applications. In order to optimize and control the performance in organic devices such as organic solar cells, a comprehensive understanding of the contacts is essential. However, despite the vast progress made, a fundamental theory of the physical processes taking place at the contacts is still lacking. In this work, a numerical device model is used to clarify the effect of imperfect contacts in organic bulk heterojunction solar cells. The effect of increased injection barriers, reduced surface recombination, interfacial minority carrier doping, and traps for majority carriers at the electrodes causing reduced efficiencies is simulated. Two distinctly different underlying mechanisms leading to different S-shaped features are found, both leading to an effective shift of the built-in voltage. In the case of an extraction barrier to majority carriers at the contact, such as reduced surface recombination, the S kink is due to an induced diffusion potential. In the case of interfacial doping or traps, the S kink results from band bending caused by the fixed or trapped space charge. We derive analytical expressions describing the effective reduction of the built-in voltage and the (effective) open-circuit voltage providing means to quantify and distinguish the mechanisms. We show how to experimentally differentiate between these effects and provide tools to extract the relevant physical parameters.

Oskar J. Sandberg; Mathias Nyman; Ronald Österbacka

2014-03-27T23:59:59.000Z

76

Singlet fission efficiency in tetracene-based organic solar cells  

SciTech Connect (OSTI)

Singlet exciton fission splits one singlet exciton into two triplet excitons. Using a joint analysis of photocurrent and fluorescence modulation under a magnetic field, we determine that the triplet yield within optimized tetracene organic photovoltaic devices is 153%?±?5% for a tetracene film thickness of 20?nm. The corresponding internal quantum efficiency is 127%?±?18%. These results are used to prove the effectiveness of a simplified triplet yield measurement that relies only on the magnetic field modulation of fluorescence. Despite its relatively slow rate of singlet fission, the measured triplet yields confirm that tetracene is presently the best candidate for use with silicon solar cells.

Wu, Tony C., E-mail: tonyw@mit.edu; Thompson, Nicholas J.; Congreve, Daniel N.; Hontz, Eric; Yost, Shane R.; Van Voorhis, Troy; Baldo, Marc A., E-mail: baldo@mit.edu [Energy Frontier Research Center for Excitonics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2014-05-12T23:59:59.000Z

77

Kinetics of light induced defect creation in organic solar cells  

Science Journals Connector (OSTI)

The kinetics of light-induced recombination centers in bulk heterojunction organic solar cells are measured as a function of exposure time intensity and the illumination photon energy. The density of induced centers increases with exposure but stabilizes partially due to self-annealing. UV exposure is roughly 50 times more effective for defect creation than white light or yellow-filtered white light. Light-induced breaking of C-H bonds to create H-related localized states is proposed as the underlying mechanism.

R. A. Street; D. M. Davies

2013-01-01T23:59:59.000Z

78

Nanocrystal Solar Cells  

E-Print Network [OSTI]

inorganic nanocrystal solar cells 5.1 Introduction In recentoperation of organic based solar cells and distinguish themThe organic donor-acceptor solar cell relies on a type II

Gur, Ilan

2006-01-01T23:59:59.000Z

79

Organic solar cells: Structure, materials, critical characteristics, and outlook  

Science Journals Connector (OSTI)

This review surveys recent advances in the field of photovoltaic devices based on organic photoactive materials and used for converting solar energy into electricity. Different architectures of organic photovolta...

P. A. Troshin; R. N. Lyubovskaya; V. F. Razumov

2008-06-01T23:59:59.000Z

80

Organic Semiconductors for Low—Cost Solar Cells  

Science Journals Connector (OSTI)

The current cost of solar electricity derived from silicon photovoltaics is about 30 to 40 cents per kilowatt—hour. This cost is similar to peak—power charges in California during the height of summer thus establishing a partial path to economic viability. However this competitiveness is not viable in other seasons and many other locations. This paper will discuss the basic theory and progress of a new class of photovoltaic semiconductors derived from organic polymer materials. These materials have obtained promising results with 5% conversion efficiency. In addition these materials can be manufactured relatively easily by using printing technologies and roll?to?roll coating machines similar to those used to make photographic film or newspapers. Solar cells made this way would not only be cheaper but could also be incorporated into roofing materials to reduce installation costs. Organic semiconductors can be dissolved in common solvents and sprayed or printed onto substrates so they are very promising candidates for the solar production of electricity.

Michael D. McGehee; Chiatzun Goh

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Excitonic Solar Cells  

Science Journals Connector (OSTI)

Excitonic Solar Cells ... Existing types of solar cells may be divided into two distinct classes:? conventional solar cells, such as silicon p?n junctions, and excitonic solar cells, XSCs. ... Most organic-based solar cells, including dye-sensitized solar cells, DSSCs, fall into the category of XSCs. ...

Brian A. Gregg

2003-05-01T23:59:59.000Z

82

Automation of a long-term measurement of organic solar cells; Automatisering av en långtidsmätning av organiska solceller.  

E-Print Network [OSTI]

?? Organic solar cells represent a clean and renewable source of energy. They are cheaper and handier than conventional silicon solar cells, but have lower… (more)

Fjodorov, Anton

2011-01-01T23:59:59.000Z

83

Bulk Heterojunction Organic Solar Cells utilizing a Benzothiadiazole-based Oligomer  

E-Print Network [OSTI]

Advantages over silicon solar cells · Roll-to-roll manufacturing lowers costs through a faster rate cells, which have issues of their own, will remain the dominant solar energy provider and the world to find a viable option to alleviate global energy concerns. One proposed solution, the organic solar cell

Collins, Gary S.

84

Electromagnetic field optimization for enhancing photovoltaic efficiency of organic solar cells  

Science Journals Connector (OSTI)

The electromagnetic field distribution inside multilayer organic solar cells composed of interpenetrated networks of conjugated polymers is calculated. By enhancing the...

Simon, Jean-Jacques; Torchio, Philippe; Escoubas, Ludovic; Cathelinaud, Michel; Alem, Salima; Nunzi, Jean-Michel

85

Optimization of material composition and processing parameters for hybrid organic-inorganic solar cells.  

E-Print Network [OSTI]

??The widespread adoption of hybrid organic-inorganic solar cells has been delayed by low performance. Improving performance requires a firm understanding of how to optimize both… (more)

Salpeter, Garrett Morgan

2011-01-01T23:59:59.000Z

86

Plasmonic gratings for enhanced light-trapping in thin-film organic solar cells  

Science Journals Connector (OSTI)

We discuss optimized silver gratings to enhance absorption in organic solar cells. The enhancement is attributed to generated surface plasmon (SP) polaritons and localized SP...

Le, Khai Q; Alù, Andrea

87

Effect of Metal Nanoparticles on Absorption Enhancement in Organic Solar Cells  

Science Journals Connector (OSTI)

In this study, for increasing absorption of the active layer in bulk heterojunction (BHJ) organic solar cells (OSCs), we used surface Plasmon effect. For showing the results, we...

Rostami, A; Andalibi, Sh

88

Incorporation of nanovoids into metallic gratings for broadband plasmonic organic solar cells  

Science Journals Connector (OSTI)

We present investigation and optimization of a newly proposed plasmonic organic solar cell geometry based on the incorporation of nanovoids into conventional rectangular backplane...

Lee, Sangjun; In, SungJun; Mason, Daniel R; Park, Namkyoo

2013-01-01T23:59:59.000Z

89

Using Localized Plasmon Resonances to Enhance Absorption Efficiency in Thin-film Organic Solar Cells  

Science Journals Connector (OSTI)

We propose the use of localized surface plasmon modes excited by square metallic gratings to enhance the optical absorption of thin-film organic solar cells. Broadband absorption...

Le, Khai Q; Abass, Aimi; Maes, Bjorn; Bienstman, Peter; Alu, Andrea

90

Effect of Sunlight Polarization on the Absorption Efficiency of V-shaped Organic Solar Cells  

Science Journals Connector (OSTI)

We numerically investigate the effect of sunlight polarization on the absorption efficiency of V-shaped organic solar cells (VOSCs) using the finite element method (FEM). The spectral...

Kang, Kyungnam; Kim, Jungho

2014-01-01T23:59:59.000Z

91

Resonant cavity enhanced light harvesting in flexible thin-film organic solar cells  

Science Journals Connector (OSTI)

Dielectric/metal/dielectric (DMD) electrodes have the potential to significantly increase the absorption efficiency and photocurrent in flexible organic solar cells. We demonstrate...

Sergeant, Nicholas P; Niesen, Bjoern; Liu, Albert S; Boman, Lee; Stoessel, Chris; Heremans, Paul; Peumans, Peter; Rand, Barry P; Fan, Shanhui

2013-01-01T23:59:59.000Z

92

Effect of DC to DC converters on organic solar cell arrays for powering DC loads.  

E-Print Network [OSTI]

??The objective of this research is to determine if it is possible to reduce the number of organic solar cells required to power a load… (more)

Trotter, Matthew S.

2009-01-01T23:59:59.000Z

93

Charge recombination in organic small-molecule solar cells by Jiye Lee.  

E-Print Network [OSTI]

??To enhance the power conversion efficiency in organic solar cells, charge recombination loss needs to be minimized. First, we perform transient absorption spectroscopy to study… (more)

Lee, Jiye

2008-01-01T23:59:59.000Z

94

Organic solar cells based on conjugated polymers : History and recent advances  

Science Journals Connector (OSTI)

Organic solar cells have attracted huge attention because of their ... potential in the low-cost manufacturing of plastic solar modules featuring flexible, lightweight, ultrathin, rollable ... bendable shapes. Th...

Hwajeong Kim; Sungho Nam; Jaehoon Jeong…

2014-07-01T23:59:59.000Z

95

NUMERICAL MODELING OF 3D ORGANIC SOLAR CELLS Presented to the  

E-Print Network [OSTI]

NUMERICAL MODELING OF 3D ORGANIC SOLAR CELLS _______________ A Thesis Presented to the Faculty Solar Cells by Anurag Kaushik Master of Science in Electrical Engineering San Diego State University and nanofabrication technologies offer a unique opportunity for meshing it with organic PV cell technology

Kassegne, Samuel Kinde

96

OPTIMUM MORPHOLOGY AND PERFORMANCE GAINS OF ORGANIC SOLAR CELLS Biswajit Ray and Muhammad A. Alam  

E-Print Network [OSTI]

OPTIMUM MORPHOLOGY AND PERFORMANCE GAINS OF ORGANIC SOLAR CELLS Biswajit Ray and Muhammad A. Alam geometry. INTRODUCTION AND BACKGROUND Research in the area of organic photovoltaic (OPV) cell started higher recombination due to increased interfacial area. Thus even though BHJ solar cell has achieved

Alam, Muhammad A.

97

Photoconductivity measurements of the electronic structure of organic solar cells  

Science Journals Connector (OSTI)

Experimental and theoretical studies of the electronic structure of bulk heterojunction (BHJ) organic solar cells are reported. The photoconductivity spectral response of the solar cells has a weak absorption band extending from the band-gap energy down to <1 eV due to charge-transfer optical excitation at the interface between the polymer and the fullerene. The low-energy absorption indicates an exponential band tail of localized states and an absorption model based on the one-electron joint density of electronic states accounts for the data. Transient photoconductivity measurements of the carrier mobility exhibit a temperature-dependent carrier dispersion. Data analysis for the particular case of transport in the BHJ structure is developed. A multiple trapping model of the dispersive transport is consistent with localized band tail states having a comparable density-of-states distribution to those observed by optical absorption. Theoretical calculations of the density of states including disorder in the ?-? spacing of the polymer chains also shows exponential band tailing. A density-of-states model is developed from the data and is discussed.

R. A. Street; K. W. Song; J. E. Northrup; S. Cowan

2011-04-25T23:59:59.000Z

98

Multiscale Modeling and Simulation of Organic Solar Cells  

E-Print Network [OSTI]

In this article, we continue our mathematical study of organic solar cells (OSCs) and propose a two-scale (micro- and macro-scale) model of heterojunction OSCs with interface geometries characterized by an arbitrarily complex morphology. The microscale model consists of a system of partial and ordinary differential equations in an heterogeneous domain, that provides a full description of excitation/transport phenomena occurring in the bulk regions and dissociation/recombination processes occurring in a thin material slab across the interface. The macroscale model is obtained by a micro-to-macro scale transition that consists of averaging the mass balance equations in the normal direction across the interface thickness, giving rise to nonlinear transmission conditions that are parametrized by the interfacial width. These conditions account in a lumped manner for the volumetric dissociation/recombination phenomena occurring in the thin slab and depend locally on the electric field magnitude and orientation. Usi...

de Falco, Carlo; Sacco, Riccardo; Verri, Maurizio

2012-01-01T23:59:59.000Z

99

Nanocrystal Solar Cells  

E-Print Network [OSTI]

Nov, 2005). Chapter 4 Hybrid solar cells with 3-dimensional5 All-inorganic nanocrystal solar cells 5.1 Introduction Inoperation of organic based solar cells and distinguish them

Gur, Ilan

2006-01-01T23:59:59.000Z

100

Ligand chemistry of titania precursor affects transient photovoltaic behavior in inverted organic solar cells  

E-Print Network [OSTI]

transient photovoltaic behavior in inverted organic solar cells Jong Bok Kim,1,a) Seokhoon Ahn,2,b) Seok JuLigand chemistry of titania precursor affects transient photovoltaic behavior in inverted organic solar cells Jong Bok Kim, Seokhoon Ahn, Seok Ju Kang, Colin Nuckolls, and Yueh-Lin Loo Citation: Appl

Hone, James

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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101

Organic Solar Cells with Graded Exciton-dissociation Interfaces.................................................................................................................EN.1 Luminescent Solar Concentrators for Energy-harvesting in Displays ........  

E-Print Network [OSTI]

Energy Organic Solar Cells with Graded Exciton-dissociation Interfaces.................................................................................................................EN.1 Luminescent Solar Concentrators for Energy-harvesting in Displays ...................................................................................EN.3 Nano-engineered Organic Solar-energy-harvesting System

Reif, Rafael

102

Bulk heterojunction organic solar cell based on a novel fluorescent fluorine–boron complex  

Science Journals Connector (OSTI)

Organic materials in solar cells are a promising alternative to inorganic ones...1–4...]. Moreover, the chemical flexibility for modifications on organic materials via chemical synthesis methods drives the...5–7....

Fen Qiao; Aimin Liu; Ying Zhou; Yi Xiao; Ping Ou Yang

2009-03-01T23:59:59.000Z

103

Toward High-Performance Organic-Inorganic Hybrid Solar Cells: Bringing Conjugated Polymers and Inorganic Nanocrystals in Close  

E-Print Network [OSTI]

to traditional silicon solar cells due to the capacity of producing high- efficiency solar energy in a cost these advantages and progress, organic-inorganic hybrid solar cells still exhibit much lower PCEs (iToward High-Performance Organic-Inorganic Hybrid Solar Cells: Bringing Conjugated Polymers

Lin, Zhiqun

104

Radiation induced recombination centers in organic solar cells  

Science Journals Connector (OSTI)

Prolonged x-ray exposure of bulk heterojunction organic solar cells induces deep trap states that are observed in measurements of the photocurrent spectral response. The density of induced trap states is proportional to the density of recombination centers as measured by the voltage dependence of the photocurrent, therefore identifying the traps as primary recombination centers. The states are reversible by thermal annealing to about 100?°C, which implies a metastable structural change with binding energy 1–1.2 eV. However, the annealing kinetics reveal three different annealing processes, although for defect states with essentially the same electronic character. Analysis of the radiation damage indicates that defects are formed by hydrogen release from C-H bonds due to electronic excitation by the energetic secondary electrons created by the x rays. Theoretical structure calculations of possible hydrogen-related defects find specific defect states that match the experimental observations and provide values for hydrogen migration energies that are consistent with the annealing kinetics. The effects of prolonged white light exposure are very similar to x-ray exposure, although the annealing kinetics are significantly different. Measurements of the spectral response with bias illumination provide information about the energy level of the localized states.

R. A. Street; J. E. Northrup; B. S. Krusor

2012-05-25T23:59:59.000Z

105

Nanostructured electrodes for organic bulk heterojunction solar cells: Model study using carbon nanotube dispersed polythiophene-fullerene  

E-Print Network [OSTI]

Nanostructured electrodes for organic bulk heterojunction solar cells: Model study using carbon for organic pseudo-bilayer solar cells J. Appl. Phys. 112, 084511 (2012) Addition of regiorandom poly(3 (2012) Tunable open-circuit voltage in ternary organic solar cells Appl. Phys. Lett. 101, 163302 (2012

Hone, James

106

High efficiency silicon nanohole/organic heterojunction hybrid solar cell  

SciTech Connect (OSTI)

High efficiency hybrid solar cells are fabricated based on silicon with a nanohole (SiNH) structure and poly (3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS). The SiNH structure is fabricated using electroless chemical etching with silver catalyst, and the heterojunction is formed by spin coating of PEDOT on the SiNH. The hybrid cells are optimized by varying the hole depth, and a maximum power conversion efficiency of 8.3% is achieved with a hole depth of 1??m. The SiNH hybrid solar cell exhibits a strong antireflection and light trapping property attributed to the sub-wavelength dimension of the SiNH structure.

Hong, Lei [Novitas, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore); Singapore Institute of Manufacturing Technology, A-STAR (Agency for Science, Technology and Research), 71 Nanyang Drive, Singapore 638075 (Singapore); Wang, Xincai; Zheng, Hongyu [Singapore Institute of Manufacturing Technology, A-STAR (Agency for Science, Technology and Research), 71 Nanyang Drive, Singapore 638075 (Singapore); He, Lining; Wang, Hao; Rusli, E-mail: yu.hy@sustc.edu.cn, E-mail: erusli@ntu.edu.sg [Novitas, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore); Yu, Hongyu, E-mail: yu.hy@sustc.edu.cn, E-mail: erusli@ntu.edu.sg [South University of Science and Technology of China, Shenzhen (China)

2014-02-03T23:59:59.000Z

107

An investigation into the paintbrush deposition technique for P3HT:PCBM based organic heterojunction solar cells.  

E-Print Network [OSTI]

??Research in organic semiconductor materials and devices has increased dramatically in the last decade, particularly in the photovoltaics field. Organic based solar cells with record… (more)

Thoeming, Aaron Lee

2011-01-01T23:59:59.000Z

108

Self-Organizing Mesomorphic Diketopyrrolopyrrole Derivatives for Efficient Solution-Processed Organic Solar Cells  

Science Journals Connector (OSTI)

Organic solar cells (OSCs) are drawing considerable interest for the great promise as a next-generation clean and renewable energy source. ... T.Y. is grateful for the financial support from the Murata Science Foundation, the Fujifilm Award in Synthetic Organic Chemistry, and Kyushu University Interdisciplinary Programs in Education and Projects in Research Development. ... utilizing a novel 4,9-bis(2-ethylhexyloxy)naphtho[1,2-b:5,6-b']dithiophene "zig-zag" core (zNDT) exhibits high hole mobility, upshifted frontier MO energies, and enhanced photovoltaic cell short-circuit currents, fill-factors, and power conversion efficiencies (4.7%) vs. the linear NDT isomer. ...

Woong Shin; Takuma Yasuda; Go Watanabe; Yu Seok Yang; Chihaya Adachi

2013-06-05T23:59:59.000Z

109

Exploring the 3D organisation of high-performance organic solar cells  

Science Journals Connector (OSTI)

In high performance organic solar cells, the photoactive layer consists of a blend...nanoscale phase separation, which provides a large interface area for exciton dissociation, and the existence of continuous pat...

Svetlana van Bavel; Erwan Sourty…

2008-01-01T23:59:59.000Z

110

Study of charge-collecting interlayers for single-junction and tandem organic solar cells.  

E-Print Network [OSTI]

??A hole-collecting interlayer layer for organic solar cells, NiO, processed by atomic layer deposition (ALD) was studied. ALD-NiO film offered a novel alternative to efficient… (more)

Shim, Jae Won

2014-01-01T23:59:59.000Z

111

Geometric light trapping with a V-trap for efficient organic solar cells  

Science Journals Connector (OSTI)

The efficiency of today’s most efficient organic solar cells is primarily limited by the ability of the active layer to absorb all the sunlight. While internal quantum efficiencies...

Kim, Soo Jin; Margulis, George Y; Rim, Seung-Bum; Brongersma, Mark L; McGehee, Michael D; Peumans, Peter

2013-01-01T23:59:59.000Z

112

Novel Organic Solar Cell Design To Enhance The Efficiency Using An Optical Cavity Control  

Science Journals Connector (OSTI)

We fabricated an organic solar cell where the electrodes are metallic layers that form an optical cavity. To be able to optically enhance the efficiency, we used a high fluorescence...

Betancur Lopera, Rafael A; Elias, Xavier; Vuong, Luat T; Martorell, Jordi

113

Microcavity effects on the generation, fluorescence, and diffusion of excitons in organic solar cells  

Science Journals Connector (OSTI)

We compute the short-circuit diffusion current of excitons in an organic solar cell, with special emphasis on fluorescence losses. The exciton diffusion length is not uniform but...

Kozyreff, G; Urbanek, D C; Vuong, L T; Silleras, O Nieto; Martorell, J

2013-01-01T23:59:59.000Z

114

Hafnium metallocene compounds used as cathode interfacial layers for enhanced electron transfer in organic solar cells  

Science Journals Connector (OSTI)

We have used hafnium metallocene compounds as cathode interfacial layers for organic solar cells [OSCs]. A metallocene compound consists of...6, 6]-phenyl C61 butyric acid methyl ester, bis-(ethylcyclopentadienyl...

Keunhee Park; Seungsik Oh; Donggeun Jung; Heeyeop Chae…

2012-01-01T23:59:59.000Z

115

Multi-objective-optimization-based approach to improve the electrical efficiency for organic solar cells  

Science Journals Connector (OSTI)

In this paper, new electrical scheme modeling and optimization approaches are proposed to improve the conversion efficiency of the organic solar cells. The electrical parameters such as shunt resistance ... Regio...

A. Maoucha; F. Djeffal

2012-12-01T23:59:59.000Z

116

Improved photovoltaic performance of silicon nanowire/organic hybrid solar cells by incorporating silver nanoparticles  

Science Journals Connector (OSTI)

Organic solar cells have emerged as potential energy conversion devices ... -transparent characteristics, and ability to large-scale production at low temperature [1–3...]. However, their reported efficiencies ar...

Kong Liu; Shengchun Qu; Xinhui Zhang; Furui Tan; Zhanguo Wang

2013-02-01T23:59:59.000Z

117

Design and Synthesis of Alternating Regioregular Oligothiophenes/Benzothiadiazole Copolymers for Organic Solar Cells  

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Design and Synthesis of Alternating Regioregular Oligothiophenes/Benzothiadiazole Copolymers for Organic Solar Cells ... National Research Council of Canada (NRC), 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada ...

Fushun Liang; Jianping Lu; Jianfu Ding; Raluca Movileanu; Ye Tao

2009-07-17T23:59:59.000Z

118

Quantum Efficiency of Organic Solar Cells: Electro-Optical Cavity Considerations  

Science Journals Connector (OSTI)

Quantum Efficiency of Organic Solar Cells: Electro-Optical Cavity Considerations ... The authors kindly thank SJPC, Canada, for providing sample PCDTBT material and for performing the high-temperature GPC analyses. ...

Ardalan Armin; Marappan Velusamy; Pascal Wolfer; Yuliang Zhang; Paul L Burn; Paul Meredith; Almantas Pivrikas

2014-02-13T23:59:59.000Z

119

Enhancement of optical absorption in thin-film organic solar cells through the excitation of plasmonic modes in metallic gratings  

E-Print Network [OSTI]

Enhancement of optical absorption in thin-film organic solar cells through the excitation 2010 We theoretically investigate the enhancement of optical absorption in thin-film organic solar.1063/1.3377791 Thin-film organic solar cells OSCs are a promising candidate for low-cost energy conversion.1­6 However

Veronis, Georgios

120

Panoramic View of Electrochemical Pseudocapacitor and Organic Solar Cell Research in Molecularly Engineered Energy Materials (MEEM)  

Science Journals Connector (OSTI)

Panoramic View of Electrochemical Pseudocapacitor and Organic Solar Cell Research in Molecularly Engineered Energy Materials (MEEM) ... His research group is engaged in a wide range of interdisciplinary research projects at the intersection between interfacial and transport phenomena, material science, and biology for sustainable energy conversion, storage, and efficiency technologies. ... Of these, carbon capture was phased out in the early stages of the project to concentrate available resources on the electrochemical pseudocapacitor and organic solar cell themes. ...

Jordan C. Aguirre; Amy Ferreira; Hong Ding; Samson A. Jenekhe; Nikos Kopidakis; Mark Asta; Laurent Pilon; Yves Rubin; Sarah H. Tolbert; Benjamin J. Schwartz; Bruce Dunn; Vidvuds Ozolins

2014-07-09T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Solution-Processed Organic Solar Cells with Power Conversion Efficiencies of 2.5% using Benzothiadiazole/Imide-Based Acceptors  

E-Print Network [OSTI]

Solution-Processed Organic Solar Cells with Power Conversion Efficiencies of 2.5% using achieved 0.1% power-conversion efficiency. KEYWORDS: organic electronics, solar cells, photovoltaic devices significantly different behav- iors in bulk heterojunction (BHJ) solar cells using poly(3-hexylthiophene) (P3HT

McGehee, Michael

122

Hole-conductor-free perovskite organic lead iodide heterojunction thin-film solar cells: High efficiency and junction property  

E-Print Network [OSTI]

Hole-conductor-free perovskite organic lead iodide heterojunction thin-film solar cells: High-conductor-free organic lead iodide thin film solar cells have been fabricated with a sequential deposition method are comparable to that of the high-efficiency thin-film solar cells. VC 2014 AIP Publishing LLC. [http

Wang, Wei Hua

123

Efficient Organic Solar Cells with Helical Perylene Diimide Electron Acceptors  

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PDI and its derivatives have attracted a great deal of attention as alternative electron acceptors because of their good mobility in organic field-effect transistors, high molar absorptivity, ease of functionalization, and economical starting materials. ... Fossil fuel alternatives, such as solar energy, are moving to the forefront in a variety of research fields. ... Fluorescence lifetime and triplet-state spectral, kinetic, and energetic properties are reported for the 1st time for a perylenebis(dicarboximide) dye, N,N'-bis(2,5-di-tert-butylphenyl)-3,4,9,10-perylenebis(dicarboximide) (I). ...

Yu Zhong; M. Tuan Trinh; Rongsheng Chen; Wei Wang; Petr P. Khlyabich; Bharat Kumar; Qizhi Xu; Chang-Yong Nam; Matthew Y. Sfeir; Charles Black; Michael L. Steigerwald; Yueh-Lin Loo; Shengxiong Xiao; Fay Ng; X.-Y. Zhu; Colin Nuckolls

2014-10-14T23:59:59.000Z

124

Effect of organic salt doping on the performance of single layer bulk heterojunction organic solar cell  

SciTech Connect (OSTI)

The effect of organic salt, tetrabutylammonium hexafluorophosphate (TBAPF{sub 6}) doping on the performance of single layer bulk heterojunction organic solar cell with ITO/MEHPPV:PCBM/Al structure was investigated where indium tin oxide (ITO) was used as anode, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEHPPV) as donor, (6,6)-phenyl-C61 butyric acid methyl ester (PCBM) as acceptor and aluminium (Al) as cathode. In contrast to the undoped device, the electric field-treated device doped with TBAPF{sub 6} exhibited better solar cell performance under illumination with a halogen projector lamp at 100 mW/cm{sup 2}. The short circuit current density and the open circuit voltage of the doped device increased from 0.54 {mu}A/cm{sup 2} to 6.41 {mu}A/cm{sup 2} and from 0.24 V to 0.50 V, respectively as compared to those of the undoped device. The significant improvement was attributed to the increase of built-in electric field caused by accumulation of ionic species at the active layer/electrode interfaces. (author)

Yap, C.C.; Yahaya, M. [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor (Malaysia); Salleh, M.M. [Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor (Malaysia)

2011-01-15T23:59:59.000Z

125

NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL  

E-Print Network [OSTI]

solar cell The history of dye sensitization dates back to the photosensitization phenomenon by organic

Phuyal, Dibya

2012-01-01T23:59:59.000Z

126

Catching some rays: Organic solar cells make a leap forward ...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Additional resources Primer on solar power See also Argonne Now Magazine - Summer 2014 Argonne Now Magazine - Summer 2013 Solar Energy Research at Argonne Catching some rays:...

127

Oligo and Poly-thiophene/Zno Hybrid Nanowire Solar Cells  

E-Print Network [OSTI]

less than organic bulk heterojunction solar cells. Knowledgeof individual organic/inorganic hybrid nanowire solar cells.an organic/inorganic hybrid single nanowire solar cell. End-

Briseno, Alejandro L.

2010-01-01T23:59:59.000Z

128

On transport mechanisms in solar cells involving organic semiconductors.  

E-Print Network [OSTI]

??El conocimiento del mecanismo de transporte o de conducción en las células solares es útil para identificar las pérdidas eléctricas. En esta tesis, se han… (more)

Nolasco Montaño, Jairo César

2011-01-01T23:59:59.000Z

129

Effect of simultaneous electrical and thermal treatment on the performance of bulk heterojunction organic solar cell blended with organic salt  

SciTech Connect (OSTI)

This work presents the influence of simultaneous electrical and thermal treatment on the performance of organic solar cell blended with organic salt. The organic solar cells were composed of indium tin oxide as anode, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]: (6,6)-phenyl-C61 butyric acid methyl ester: tetrabutylammonium hexafluorophosphate blend as organic active layer and aluminium as cathode. The devices underwent a simultaneous fixed-voltage electrical and thermal treatment at different temperatures of 25, 50 and 75 °C. It was found that photovoltaic performance improved with the thermal treatment temperature. Accumulation of more organic salt ions in the active layer leads to broadening of p-n doped regions and hence higher built-in electric field across thin intrinsic layer. The simultaneous electrical and thermal treatment has been shown to be able to reduce the electrical treatment voltage.

Sabri, Nasehah Syamin; Yap, Chi Chin; Yahaya, Muhammad [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia); Salleh, Muhamad Mat [Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia)

2013-11-27T23:59:59.000Z

130

More stable hybrid organic solar cells deposited on amorphous Si electron transfer layer  

SciTech Connect (OSTI)

We report on defect densities, performance, and stability of organic/inorganic hybrid solar cells produced using n-doped inorganic amorphous silicon-carbide layers as the electron transport layer (ETL). The organic material was poly-3-hexyl-thiophene (P3HT) and heterojunction was formed using phenyl-C{sub 71}-Butyric-Acid-Methyl Ester (PCBM). For comparison, inverted solar cells fabricated using Cs{sub 2}CO{sub 3} as ETL were fabricated. Defect densities and subgap quantum efficiency curves were found to be nearly identical for both types of cells. The cells were subjected to 2xsun illumination and it was found that the cells produced using doped a-Si as ETL were much more stable than the cells produced using Cs{sub 2}CO{sub 3}.

Samiee, Mehran; Modtland, Brian; Dalal, Vikram L., E-mail: vdalal@iastate.edu [Iowa State University, Dept. of Electrical and Computer Engineering, Ames, Iowa 50011 (United States); Aidarkhanov, Damir [Nazarbayev University, Astana (Kazakhstan)

2014-05-26T23:59:59.000Z

131

Improving the Power Conversion Efficiency of Ultrathin Organic Solar Cells by Incorporating Plasmonic Effects of Spheroidal Metallic Nanoparticles  

E-Print Network [OSTI]

Improving the Power Conversion Efficiency of Ultrathin Organic Solar Cells by Incorporating be exploited to achieve efficient harvesting of solar energy. Notably, the incorporation of plasmonic effects can allow the light harvesting capability of a solar cell to be maintained even as the thickness

Park, Namkyoo

132

Crystalline-Silicon/Organic Heterojunctions for Solar  

E-Print Network [OSTI]

-semiconductors is potentially cheaper, but the organic solar cells are not very efficient. In this thesis we explore if organic semiconductors can be integrated with silicon to form hybrid organic/silicon solar cells that are both efficient, a silicon/organic heterojunction solar cell with an open-circuit voltage of 0.59 V and power conversion

133

Study of Schottky Barrier Contact in Hybrid CdSe Quantum Dot Organic Solar Cells  

Science Journals Connector (OSTI)

The hybrid organic solar cell devices are fabricated from P3HT:PCBM with...Light ? JDark) equals to zero at compensation voltage of 0.61 V. The depletion width (W) of an abrupt Schottky junction is calculated usi...

M. Ramar; R. Manimozhi; C. K. Suman; R. Ahamad…

2014-01-01T23:59:59.000Z

134

Graphene-based functional materials for organic solar cells [Invited  

Science Journals Connector (OSTI)

Graphene is of great interest for future applications in organic photovoltaics (OPVs) due to its high three-dimensional aspect ratio, large specific surface area, remarkable optical...

Pan, Zhe; Gu, Huili; Wu, Meng-Ting; Li, Yongxi; Chen, Yu

2012-01-01T23:59:59.000Z

135

Nanocomposites for Enhancing Current in Organic Solar Cells.  

E-Print Network [OSTI]

??The enhancement of charge collection in organic photovoltaics by using nanocomposite materials is investigated. Two such approaches are detailed in this thesis. Chapter 1 addresses… (more)

Peterson, Eric David

2012-01-01T23:59:59.000Z

136

Rational Device Design for Highly Efficient Organic Photovoltaic Solar Cells.  

E-Print Network [OSTI]

??Abundant, scalable, environmentally-friendly organic photovoltaic (OPV) technology is increasingly promising in recent years. The power conversion efficiency (PCE) of OPVs has been raised to around… (more)

Yang, Bin

2013-01-01T23:59:59.000Z

137

Reply to “Comment on ‘Interface state recombination in organic solar cells’?”  

Science Journals Connector (OSTI)

The Comment by Deibel and Wagenpfahl concerning recombination in organic bulk heterojunction solar cells is discussed. A simple transport and recombination model supports our previous conclusion that the bias dependence of the cell photocurrent correctly identifies the recombination kinetics, and that at low illumination intensity the recombination is first order. The analysis suggests that the two points of view may be reconciled. The experimental evidence for bimolecular recombination and some general aspects of recombination are discussed.

R. A. Street

2010-11-02T23:59:59.000Z

138

Exciton Migration in Organic LEDs and Solar Cells  

Science Journals Connector (OSTI)

Triplet exciton migration is a very important process for both organic LEDs and photovoltaics. We have explored a number of new materials in both OLEDs and OPVs and examined triplet...

Thompson, Mark; Wu, Chao; Djurovich, Peter; Perez, M Dolores

139

Low-Cost Photovoltaics: Luminescent Solar Concentrators And Colloidal Quantum Dot Solar Cells  

E-Print Network [OSTI]

photon harvesting in organic solar cells with luminescentfor low-energy gap organic solar cells,” Sol. Energy Mater.

Leow, Shin Woei

2014-01-01T23:59:59.000Z

140

Study of surface enhanced resonant Raman spectroscopy of chromophores on unaggregated plasmonically active nanoparticles / Surface-enhanced Raman study of the interaction of the PEDOT:PSS and P3HT/PCBM components of organic polymer solar cells with plasmonically active nanoparticles  

E-Print Network [OSTI]

Light Collection in Organic Solar Cells. Appl. Phys. Lett.Performance of Organic Solar Cells using Electrodeposited AgHybrid Plasmonic Organic Solar Cells with Ag Nanoparticles.

Stavytska-Barba, Marina Valeriyivna

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Hybrid electrohydrodynamic atomization of nanostructured silver top contact for inverted organic solar cells  

Science Journals Connector (OSTI)

Abstract The present study is demonstrating the deposition of solution based nanostructured silver top electrode for inverted organic solar cells. The deposition of silver nanoparticles through hybrid electrohydrodynamic atomization (Hybrid-EHDA) is discussed in detail. The film thicknesses were varied with respect to spray times. The interface between the metal electrode and organic film was investigated using a focused ion beam analyzer. The sheet resistance of nanostructured silver film was reduced by increasing the film thickness. The lowest sheet resistance of silver film is ~0.07 ?/sq with a film thickness of 2.6 µm. The power conversion efficiency of fabricated devices was found to be influenced by the sheet resistance of silver film. The maximum power conversion efficiency (~2.44%) was observed at 0.07 ?/sq. Our results demonstrate that the Hybrid-EHDA will play a promising role in the fabrication of inverted organic solar cells using a solution based top electrode.

Junwoo Kim; Navaneethan Duraisamy; Taik-Min Lee; Inyoung Kim; Kyung-Hyun Choi

2014-01-01T23:59:59.000Z

142

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network [OSTI]

and P. Peumans, “Organic solar cells with solution-processedtypical thickness in organic solar cell application [4]. At

Shao, Qinghui

2009-01-01T23:59:59.000Z

143

Scientists at ALS Find New Path to More Efficient Organic Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Scientists at ALS Find New Path to Scientists at ALS Find New Path to More Efficient Organic Solar Cells Scientists at ALS Find New Path to More Efficient Organic Solar Cells Print Monday, 07 January 2013 00:00 Harald Ade, a physicist at North Carolina State University, led a study at the Advanced Light Source that revealed a second pathway to improved performances of polymer/organic solar cells. Whereas the first pathway demands crystals of ultrapure domains, the new pathway shows that impure domains if sufficiently small can also lead to improved photovoltaic performances. Also working on this project were Brian Collins, Zhe Li, John Tumbleston, Eliot Gann and Christopher McNeill. Read the News Release Molecular view of polymer/fullerene solar film showing an interface between acceptor and donor domains. Red dots are PC71BM molecules and blue lines represent PTB7 chains. Excitons are shown as yellow dots, purple dots are electrons and green dots represent holes

144

Effective Absorption Enhancement in Small Molecule Organic Solar Cells by Employing Trapezoid Gratings  

E-Print Network [OSTI]

We demonstrate the optical absorption has been enhanced in the small molecule organic solar cells by employing trapezoid grating structure. The enhanced absorption is mainly attributed to both waveguide modes and surface plasmon modes, which has been simulated by using finite-difference time-domain method. The simulated results show that the surface plasmon along the semitransparent metallic Ag anode is excited by introducing the periodical trapezoid gratings, which induce high intensity field increment in the donor layer. Meanwhile, the waveguide modes result a high intensity field in acceptor layer. The increment of field improves the absorption of organic solar cells, significantly, which has been demonstrated by simulating the electrical properties. The simulated results exhibiting 31 % increment of the short-circuit current has been achieved in the optimized device, which is supported by the experimental measurement. The power conversion efficiency of the grating sample obtained in experiment exhibits an...

Chun-Ping, Xiang; Yu, Jin; Bin-Zong, Xu; Wei-Min, Wang; Xin, Wei; Guo-Feng, Song; Yun, Xu

2013-01-01T23:59:59.000Z

145

Microcavity effects on the generation,fluorescence, and diffusion of excitons in organic solar cells  

E-Print Network [OSTI]

We compute the short-circuit diffusion current of excitons in an organic solar cell, with special emphasis on fluorescence losses. The exciton diffusion length is not uniform but varies with its position within the device, even with moderate fluorescence quantum efficiency. With large quantum efficiencies, the rate of fluorescence can be strongly reduced with proper choices of the geometrical and dielectric parameters. In this way, the diffusion length can be increased and the device performance significantly improved.

Kozyreff, G; Vuong, L T; Silleras, O Nieto; Martorell, J

2013-01-01T23:59:59.000Z

146

Highly efficient inverted organic solar cells using amino acid modified indium tin oxide as cathode  

SciTech Connect (OSTI)

In this paper, we report that highly efficient inverted organic solar cells were achieved by modifying the surface of indium tin oxide (ITO) using an amino acid, Serine (Ser). With the modification of the ITO surface, device efficiency was significantly enhanced from 0.63% to 4.17%, accompanied with an open circuit voltage (Voc) that was enhanced from 0.30?V to 0.55?V. Ultraviolet and X-ray photoelectron spectroscopy studies indicate that the work function reduction induced by the amino acid modification resulting in the decreased barrier height at the ITO/organic interface played a crucial role in the enhanced performances.

Li, Aiyuan; Nie, Riming; Deng, Xianyu, E-mail: xydeng@hitsz.edu.cn [Research Center for Advanced Functional Materials and Devices, Shenzhen Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055 (China); Wei, Huaixin; Li, Yanqing; Tang, Jianxin [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123 (China); Zheng, Shizhao; Wong, King-Young [Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong (China)

2014-03-24T23:59:59.000Z

147

Optimum ratio of electron-to-hole mobility in P3HT:PCBM organic solar cells  

Science Journals Connector (OSTI)

We investigate the influence of different electron-to-hole mobility ratios on the performance of a P3HT:PCBM bulk heterojunction organic solar cell by using numerical simulations. We show that...

Omar Ramírez; Víctor Cabrera; Luis Martín Reséndiz

2014-10-01T23:59:59.000Z

148

Optimization of an Electron Transport Layer to Enhance the Power Conversion Efficiency of Flexible Inverted Organic Solar Cells  

Science Journals Connector (OSTI)

The photovoltaic (PV) performance of flexible inverted organic solar cells (IOSCs) with an active layer consisting...61-butlyric acid methyl ester was investigated by varying the thicknesses of ZnO seed layers an...

Kang Hyuck Lee; Brijesh Kumar; Hye-Jeong Park; Sang-Woo Kim

2010-12-01T23:59:59.000Z

149

Structure-property relationships of organic dyes with D-?-A structure in dye-sensitized solar cells  

Science Journals Connector (OSTI)

Organic dyes with a D-?-A structure ... drawn increasing attention as sensitizers in dye-sensitized solar cells (DSSCs), due to their rich photophysical ... properties, easy molecular tailoring, and low-cost production

Zhong-Sheng Wang; Fang Liu

2010-06-01T23:59:59.000Z

150

Plasmonic excitation of organic double heterostructure solar cells J. K. Mapel, M. Singh, and M. A. Baldoa  

E-Print Network [OSTI]

Plasmonic excitation of organic double heterostructure solar cells J. K. Mapel, M. Singh, and M. A. Baldoa Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 K. Celebi Department of Physics, Massachusetts Institute of Technology

151

The Photovoltaic Market Facing the Challenge of Organic Solar Cells: Economic and Technical Perspectives  

Science Journals Connector (OSTI)

Solar cells are gaining more interest in recent ... solution to improve energy production whilst reducing its environmental impact. The majority of the market is still dominated by first generation solar cells ma...

Paolo Chiappafreddo; Alessio Gagliardi

2010-06-01T23:59:59.000Z

152

Solution processable organic polymers and small molecules for bulk?heterojunction solar cells: A review  

Science Journals Connector (OSTI)

Solution processed bulk heterojunction (BHJ) organic solar cells (OSCs) have gained wide interest in past few years and are established as one of the leading next generation photovoltaic technologies for low cost power production. Power conversion efficiencies up to 6% and 6.5% have been reported in the literature for single layer and tandem solar cells respectively using conjugated polymers. A recent record efficiency about 8.13% with active area of 1.13 cm 2 has been reported. However Solution processable small molecules have been widely applied for photovoltaic (PV) devices in recent years because they show strong absorption properties and they can be easily purified and deposited onto flexible substrates at low cost. Introducing different donor and acceptor groups to construct donor—acceptor (D—A) structure small molecules has proved to be an efficient way to improve the properties of organic solar cells (OSCs). The power conversion efficiency about 4.4 % has been reported for OSCs based on the small molecules. This review deals with the recent progress of solution processable D—A structure small molecules and discusses the key factors affecting the properties of OSCs based on D—A structure small molecules: sunlight absorption charge transport and the energy level of the molecules.

G. D. Sharma

2011-01-01T23:59:59.000Z

153

A compact physical model for morphology induced intrinsic degradation of organic bulk heterojunction solar cell  

E-Print Network [OSTI]

challenge for economic viability of any solar cell technology. Well known examples include light heterojunction solar cell Biswajit Raya) and Muhammad A. Alamb) School of Electrical and Computer Engineering-OPV literature shows that the degradation mechanisms of BH solar cell are complex, diverse, and poorly understood

Alam, Muhammad A.

154

Derivation of the open-circuit voltage of organic solar cells  

Science Journals Connector (OSTI)

Organic photovoltaic cells have improved in efficiency from 1% two decades ago to over 10% today. Continued improvement necessitates a theoretical understanding of the factors determining efficiency. Organic photovoltaic efficiency can be parameterized in terms of open-circuit voltage, short-circuit current, and fill factor. Here we present a theory that explains the dependencies of open-circuit voltage on semiconductor energy levels, light intensity, solar cell and light-source temperatures, charge-carrier recombination, and external fluorescence efficiency. The present theory also explains why recombination at the donor-acceptor heterointerface is a dominant process in heterojunction-based cells. Furthermore, the Carnot efficiency appears, highlighting the connection to basic thermodynamics. The theory presented here is consistent with and builds on the experimental and theoretical observations already in the literature. Crucially, the present theory can be straightforwardly derived in a line-by-line fashion using standard tools from statistical physics.

Douglas B. Staple; Patricia A. K. Oliver; Ian G. Hill

2014-05-20T23:59:59.000Z

155

Investigation of pentaarylazafullerenes as acceptor systems for bulk-heterojunction organic solar cells  

Science Journals Connector (OSTI)

Abstract In a comparative study a novel class of pentaarylazafullerene derivatives is investigated as acceptor material in solution-processed organic solar cells. Due to their raised lowest unoccupied molecular orbital (LUMO) compared to phenyl-C61-butyric acid methyl ester (PC61BM) the orbital matching to P3HT is optimized so that an increased open-circuit voltage (VOC) compared to the standard PC61BM acceptor is gained. However, the performance of pentaarylazafullerene solar cells is limited by rather low short circuit currents (JSC) and fill factors (FF) which can be partially improved by using 1-methylnaphtalene as additive. Within this series the azafullerenes with phenoxyphenyl and phenoxymethyl addends 1 and 3 show the best results with encouraging \\{VOCs\\} of >800 mV and power conversion efficiencies (PCEs) of 0.9%.

Cordula D. Wessendorf; Regina Eigler; Siegfried Eigler; Jonas Hanisch; Andreas Hirsch; Erik Ahlswede

2015-01-01T23:59:59.000Z

156

Optical design and efficiency improvement for organic luminescent solar concentrators  

E-Print Network [OSTI]

Optical design and efficiency improvement for organic luminescent solar concentrators Chunhua Wanga and efficiency improvement method. Keywords: Organic luminescent solar concentrators, Photovoltaic, solar energy, efficiency, multi-layer, solar cells, liquid crystal, molecular alignment 1. INTRODUCTION By using

Hirst, Linda

157

Room temperature solution-processed electron transport layer for organic solar cells  

Science Journals Connector (OSTI)

Abstract We present a new recipe for a solution-processed titanium oxide (TiOx) based electron transport layer at room temperature. Due to its high chemical compatibility with all types of organic blends (semi-crystalline or amorphous) and it is good adhesion to both surfaces of glass/ITO substrate and the active layer (blend), the buffer layer is suitable for use in organic solar cell devices with conventional, inverted or multi-junction structures. The main goal of this recipe is producing with easiness an repeatable and stable precursor that will leads to titanium oxide buffer layer each time with the same quality. Since the processing of the titanium oxide layer itself does not require any initial or additional treatment before and after the coating, and can even be carried in air as well as under protective atmosphere, our room temperature solution-processed electron transport layer is highly versatile and very promising for cost effective mass production of organic solar cells.

A. Hadipour; R. Müller; P. Heremans

2013-01-01T23:59:59.000Z

158

Using stochastic models to determine financial indicators and technical objectives for organic solar cells  

Science Journals Connector (OSTI)

Organic photovoltaics (PVs) are a rapidly emerging technology that has the potential to provide low-cost power for many different applications. The TEEOS model had previously been developed to determine various financial indicators for this technology. This paper modifies TEEOS in order to better analyze the effects of variability in the inputs. This modified TEEOS incorporates a mean-reverting jump diffusion model to simulate synthetic electricity price and a modified rainfall occurrence model to simulate a weather series. As well, the external quantum efficiency (EQE) is used as an input in order to gain insight on using low band gap polymers or enhancing the existing EQE. The power production NPV of three example cells, a Si-based solar cell, dye-sensitized solar cell (DSSC) and an organic solar cell (OSC), are first examined using a 25-year time period where the DSSC and OSC have to be replaced five times due to low lifetimes. The DSSC and OSC are also compared using five years of actual data using a five-year horizon. The sensitivity analysis looks specifically at inherent increases in the electricity price, the correlation of electricity prices and weather, modeling electricity without jumps, as well as enhancing and expanding the EQE. The best option for increasing the economic feasbility for the \\{OSCs\\} is expanding the EQE, that is, reducing the band gap of the polymers used. A break-even target of $45/m2 for the OSC is stated, which is on the low range of current cost estimates; this break-even-target would increase for locales closer to the equator.

Colin Powell; Yuri Lawryshyn; Timothy Bender

2012-01-01T23:59:59.000Z

159

Solvent polarity and nanoscale morphology in bulk heterojunction organic solar cells: A case study  

SciTech Connect (OSTI)

Organic bulk heterojunction solar cells were fabricated under identical experimental conditions, except by varying the solvent polarity used for spin coating the active layer components and their performance was evaluated systematically. Results showed that presence of nitrobenzene-chlorobenzene composition governs the morphology of active layer formed, which is due to the tuning of solvent polarity as well as the resulting solubility of the P3HT:PCBM blend. Trace amount of nitrobenzene favoured the formation of better organised P3HT domains, as evident from conductive AFM, tapping mode AFM and surface, and cross-sectional SEM analysis. The higher interfacial surface area thus generated produced cells with high efficiency. But, an increase in the nitrobenzene composition leads to a decrease in cell performance, which is due to the formation of an active layer with larger size polymer domain networks with poor charge separation possibility.

Thomas, Ajith [Centre for Nano-Bio-Polymer Science and Technology, Department of Physics, St. Thomas College, Pala, Kerala 686574 (India); Research and Development Centre, Bharathiar University, Coimbatore, Tamilnadu 641046 (India); Elsa Tom, Anju; Ison, V. V., E-mail: isonvv@yahoo.in, E-mail: praveen@materials.iisc.ernet.in [Centre for Nano-Bio-Polymer Science and Technology, Department of Physics, St. Thomas College, Pala, Kerala 686574 (India); Rao, Arun D.; Varman, K. Arul; Ranjith, K.; Ramamurthy, Praveen C., E-mail: isonvv@yahoo.in, E-mail: praveen@materials.iisc.ernet.in [Department of Materials Engineering, Indian Institute of Science Bangalore, Karnataka 560012 (India); Vinayakan, R. [Department of Chemistry, SVR NSS College Vazhoor, Kerala 686505 (India)

2014-03-14T23:59:59.000Z

160

Investigation of the Role of Trap States in Solar Cell Reliability using Photothermal Deflection Spectroscopy  

E-Print Network [OSTI]

the polymer and organic solar cells present the greatestlayer component in the organic solar cell is the part of theORGANIC POLYMERS SOLAR CELLS

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Achieving High Performance Polymer Tandem Solar Cells via Novel Materials Design  

E-Print Network [OSTI]

of conjugated polymers for organic solar cell applications.characterization of organic solar cells. Adv. Funct. Mater.techniques for the organic solar cell are employed to

Dou, Letian

2014-01-01T23:59:59.000Z

162

Green Organic Solar Cells from a Water Soluble Polymer and Nancrystalline TiO2.  

E-Print Network [OSTI]

??The cost of the present generation of inorganic silicon solar cells is very high and further breakthroughs in cost and efficiency using traditional materials are… (more)

Qiao, Qiquan

2008-01-01T23:59:59.000Z

163

Organic bulk heterojunction solar cells using poly,,2,5-bis,,3-tetradecyllthiophen-2-yl...thieno3,2,-bthiophene...  

E-Print Network [OSTI]

. While the cost per watt of solar cell technology has steadily decreased in the past decade, an estimatedOrganic bulk heterojunction solar cells using poly,,2,5-bis,,3-tetradecyllthiophen-2-yl...thieno3 By transitioning to semicrystalline polymers, the performance of polymer-based solar cells has recently increased

McGehee, Michael

164

Plasmonic Organic Solar Cell and Its Absorption Enhancement Analysis Using Cylindrical Ag Nano-Particle Model based on Finite Difference Time Domain (FDTD)  

Science Journals Connector (OSTI)

We report plasmon-assisted photocurrent enhancement in Ag-nanoparticles-embedded organic solar cells, and theoretically investigate the causes of improved optical absorption based on a...

Kim, Seongku; Wang, Kang L; Pei, Qibing; Park, GyeChoon

165

ITO-free organic solar cells with roll-to-roll coated organic functional layers from non-halogenated solvents  

Science Journals Connector (OSTI)

Abstract This work reports on indium tin oxide (ITO)-free organic solar cells with roll to roll (R2R) processed organic functional layers. The device stack comprises a chromium–aluminum–chromium (Cr–Al–Cr) electron contact layer on a polyethylene terephthalate (PET) film, a photoactive layer of poly(3-hexylthiophene) (P3HT): (6,6)-phenyl C61 butyric acid methyl ester (PCBM), a hole transport layer of Poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) and a silver (Ag) grid for current collection. For the photoactive layer the non-halogenated solvent o-Xylene was used in order to reduce the impact on health and environment for R2R coating on ambient atmospheric conditions. The Cr–Al–Cr layers were sputtered onto the PET rolls in a batch process while the photoactive layer as well as the hole transport layer were applied in a continuous R2R process by slot die coating. The Ag grid was either thermally evaporated through a shadow mask as reference process or deposited by aerosol printing as a more production compatible process. Device efficiencies up to 2.9% on an active area of 1.1 cm2 were obtained with no difference for the method of grid processing. These experimental results demonstrate that R2R coated organic functional layers in ITO-free devices obtain the same device performance as compared to spin coated laboratory cells.

Deepak Kaduwal; Hans-Frieder Schleiermacher; Jan Schulz-Gericke; Thomas Kroyer; Birger Zimmermann; Uli Würfel

2014-01-01T23:59:59.000Z

166

Organic solar cells with an ultra thin organized hole transport layer  

Science Journals Connector (OSTI)

Discotic liquid crystals (LC) are promising materials to manufacture devices for organic photovoltaic conversion. These molecules possess a mesophase ... the columns. After the deposition of an organic layer on t...

S. Archambeau; H. Bock; I. Seguy; P. Jolinat…

2007-09-01T23:59:59.000Z

167

The Application of Highly Doped Single-Layer Graphene as the Top Electrodes of Semitransparent Organic Solar Cells  

Science Journals Connector (OSTI)

Besides its use as the bottom electrode for organic solar cells, we find that graphene is an excellent candidate for the top electrode of a semitransparent organic solar cell since large area graphene films can be easily transferred to the top of various substrates by a solution process at room temperature. ... reported roll-to-roll production of single-layer CVD graphene film with the resistance of only 125 ?/?. ... Today, graphene is limited to small sizes because it is produced mostly by exfoliating graphite. ...

Zhike Liu; Jinhua Li; Zhen-Hua Sun; Guoan Tai; Shu-Ping Lau; Feng Yan

2011-12-11T23:59:59.000Z

168

Alkyl Surface Treatments of Planar Zinc Oxide in Hybrid Organic/Inorganic Solar Cells  

SciTech Connect (OSTI)

Hybrid organic/inorganic solar cells have not lived up to their potential because of poor interface properties. Interfacial molecular layers provide a way of adjusting these devices to improve their performance. We have studied a prototypical system involving poly(3-hexylthiophene) (P3HT) on planar zinc oxide (ZnO) films that have been modified with two types of molecules having identical 18-carbon alkyl chain termination and different surface attachments: octadecanethiol (ODT) and octadecyltriethoxysilane (OTES). We examined the functionalized surfaces using water contact angle measurements, Kelvin probe measurements, infrared absorbance spectroscopy, and atomic force microscopy. These have shown that OTES forms disordered incomplete monolayers, while ODT is prone to develop multilayered islands. Both treatments enhance polymer ordering. However, inverted solar cell devices fabricated with these treated interfaces performed very differently. ODT improves the short circuit current (J{sub SC}), open circuit voltage (V{sub OC}), and power conversion efficiency ({eta}), while these parameters all decrease in devices constructed from OTES-treated ZnO. The differences in V{sub OC} are related to modifications of the surface dipole associated with deposition of the two types of alkyl molecules, while changes in J{sub SC} are attributed to a balance between charge transfer blocking caused by the saturated hydrocarbon and the improved hole mobility in the polymer.

Allen, C. G.; Baker, D. J.; Brenner, T. M.; Weigand, C. C.; Albin, J. M.; Steirer, K. X.; Olson, D. C.; Ladam, C.; Ginley, D. S.; Collins, R. T.; Furtak, T. E.

2012-04-26T23:59:59.000Z

169

Relationship between energetic disorder and open-circuit voltage in bulk heterojunction organic solar cells  

Science Journals Connector (OSTI)

We simulate organic bulk heterojunction solar cells. The effects of energetic disorder are incorporated through a Gaussian or exponential model of density of states. Analytical models of open-circuit voltage (VOC) are derived from the splitting of quasi-Fermi potentials. Their predictions are backed up by more complex numerical device simulations including effects such as carrier-density–dependent charge-carrier mobilities. It is predicted that the VOC depends on: (1) the donor-acceptor energy gap; (2) charge-carrier recombination rates; (3) illumination intensity; (4) the contact work functions (if not in the pinning regime); and (5) the amount of energetic disorder. A large degree of energetic disorder, or a high density of traps, is found to cause significant reductions in VOC. This can explain why VOC is often less than expected in real devices. Energetic disorder also explains the nonideal temperature and intensity dependence of VOC and the superbimolecular recombination rates observed in many real bulk heterojunction solar cells.

James C. Blakesley and Dieter Neher

2011-08-12T23:59:59.000Z

170

High Efficiency Organic Solar Cells: December 16, 2009 - February 2, 2011  

SciTech Connect (OSTI)

Details on the development of novel organic solar cells incorporating Trimetasphere based acceptors are presented including: baseline performance for Lu-PCBEH acceptor blended with P3HT demonstrated at 4.89% PCE exceeding the 4.5% PCE goal; an increase of over 250mV in Voc was demonstrated for Lu-PCBEH blended with low band gap polymers compared to a comparable C60-PCBM device. The actual Voc was certified at 260mV higher for a low band gap polymer device using the Lu-PCBEH acceptor; and the majority of the effort was focused on development of a device with over 7% PCE. While low current and fill factors suppressed overall device performance for the low band gap polymers tested, significant discoveries were made that point the way for future development of these novel acceptor materials.

Walker, K.; Joslin, S.

2011-05-01T23:59:59.000Z

171

High-performance hybrid organic-inorganic solar cell based on planar n-type silicon  

SciTech Connect (OSTI)

Hybrid organic-inorganic solar cells were fabricated by spin coating the hole transporting conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) film on n-type crystalline silicon (n-Si). By incorporating different additives into the PEDOT:PSS, the conductivity and wettability of PEDOT:PSS film are markedly improved, and the device performance is greatly enhanced accordingly. To further optimize the device performance, poly(3-hexylthiophene) (P3HT) layer was inserted between the n-Si and PEDOT:PSS layer. The P3HT layer blocks electrons from diffusing to the PEDOT:PSS, and hence reduces recombination at the anode side. The device eventually exhibits a high power conversion efficiency of 11.52%.

Chi, Dan [Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China); Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Qi, Boyuan; Wang, Jizheng [Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Qu, Shengchun, E-mail: qsc@semi.ac.cn; Wang, Zhanguo [Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China)

2014-05-12T23:59:59.000Z

172

Analytical and Numerical Study of Photocurrent Transients in Organic Polymer Solar Cells  

E-Print Network [OSTI]

This article is an attempt to provide a self consistent picture, including existence analysis and numerical solution algorithms, of the mathematical problems arising from modeling photocurrent transients in Organic-polymer Solar Cells (OSCs). The mathematical model for OSCs consists of a system of nonlinear diffusion-reaction partial differential equations (PDEs) with electrostatic convection, coupled to a kinetic ordinary differential equation (ODE). We propose a suitable reformulation of the model that allows us to prove the existence of a solution in both stationary and transient conditions and to better highlight the role of exciton dynamics in determining the device turn-on time. For the numerical treatment of the problem, we carry out a temporal semi-discretization using an implicit adaptive method, and the resulting sequence of differential subproblems is linearized using the Newton-Raphson method with inexact evaluation of the Jacobian. Then, we use exponentially fitted finite elements for the spatial...

de Falco, Carlo; Verri, Maurizio; 10.1016/j.cma.2010.01.018

2012-01-01T23:59:59.000Z

173

Localized state distribution and its effect on recombination in organic solar cells  

Science Journals Connector (OSTI)

Transient photocurrent (TPC) and transient photovoltage (TPV) measurements are reported in bulk heterojunction organic solar cells. TPC is used to measure the band tail and deep trap density of states within the interface band gap and to identify the carrier species from the relative contribution of drift and diffusion. Steep exponential band tails are observed near the donor valence band edge, changing to a broader distribution of states at larger trap energies. The effect of the localized state distribution on the recombination is analyzed—particularly for geminate recombination, where it is shown that band tails can substantially enhance the probability that geminate pairs ionize to form free carriers. The TPV response is shown to have completely different characteristics from those of TPC, and the explanation is provided.

R. A. Street

2011-08-12T23:59:59.000Z

174

Favorable electronic structure for organic solar cells induced by strong interaction at interface  

SciTech Connect (OSTI)

To clarify the role of buffer layer in organic solar cells (OSCs), the electronic properties of bathocuproine (BCP)/Mg interface were systematically investigated by using ultraviolet photoemissions spectroscopy, high-resolution X-ray photoemission spectroscopy, angle-resolved X-ray photoemission spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. The results show there are gap states at the interface, which are caused by the interaction between BCP and Mg. The formation of Mg-N bond was found at the interface. The NEXAFS measurements show that BCP molecules for 1-2 monolayers are lying-down on the substrate, whereas orient randomly for thick BCP layer. It was supposed that the gap states and the highly-ordered orientation of thin BCP layer are the reasons for improving the performance of OSC with BCP buffer layer and low work function metal cathode.

Wang, Shenghao, E-mail: wsh8511@gmail.com; Hao, Xia; Fu, Wei; Akimoto, Katsuhiro [Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8573 (Japan); Sakurai, Takeaki [Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8573 (Japan); PRESTO, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012 (Japan); Masuda, Shigeru [Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro, Tokyo 153-8902 (Japan)

2013-11-14T23:59:59.000Z

175

Using metallic nanostructures to trap light and enhance absorption in organic solar cells.  

E-Print Network [OSTI]

??Solar cells generate clean electricity from sunlight. However, they remain signi?cantly more expensive than other, less environmentally-friendly, energy generation technologies. Although the emergence of thin-?lm… (more)

Dunbar, Ricky

2012-01-01T23:59:59.000Z

176

Ultraviolet-ozone-treated PEDOT:PSS as anode buffer layer for organic solar cells  

Science Journals Connector (OSTI)

Ultraviolet-ozone-treated poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)was used as the anode buffer layer in copper phthalocyanine (CuPc)/fullerene-based solar cells. The power conversion e...

Zisheng Su; Lidan Wang; Yantao Li; Haifeng Zhao; Bei Chu…

2012-08-01T23:59:59.000Z

177

Novel Organic Solar Cell Design towards an Optical Control of the Exciton Diffusion Length  

Science Journals Connector (OSTI)

The exciton diffusion could be increased if highly fluorescent materials were used. We developed a kind of such material and studied the performance of solar cells where the electrodes...

Martorell, Jordi; Elias, Xavier; Pasini, Saverio; Betancur, Rafael; Vuong, Luat T; Macovez, Roberto

178

Highly efficient flexible inverted organic solar cells using atomic layer deposited ZnO as electron selective layer  

E-Print Network [OSTI]

advancements, the power conversion efficiency (PCE) of organic solar cells (OSCs) has been improved with PCE more than 4% was demonstrated.7 However,Cs2CO3 exhibitsdeliquescencewhichaffects severely a PCE of 3.09%.14 Hau et al. adopted spin-coated ZnO nanoparticles as the electron selective layer

179

Simple Way to Engineer Metal–Semiconductor Interface for Enhanced Performance of Perovskite Organic Lead Iodide Solar Cells  

Science Journals Connector (OSTI)

Simple Way to Engineer Metal–Semiconductor Interface for Enhanced Performance of Perovskite Organic Lead Iodide Solar Cells ... ‡ School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China ... However, ALD technique has the problems of strict working environment like vacuum and high cost precursors. ...

Yuzhuan Xu; Jiangjian Shi; Songtao Lv; Lifeng Zhu; Juan Dong; Huijue Wu; Yin Xiao; Yanhong Luo; Shirong Wang; Dongmei Li; Xianggao Li; Qingbo Meng

2014-04-01T23:59:59.000Z

180

Polymer and organic solar cells viewed as thin film technologies: What it will take for them to become a success outside academia  

Science Journals Connector (OSTI)

Abstract The polymer and organic solar cell technology is critically presented in the context of other thin film technologies with a specific focus on what it will take to make them a commercial success. The academic success of polymer and organic solar cells far outweigh any other solar cell technology when judging by the number of scientific publications whereas the application of polymer and organic solar cells in real products is completely lacking. This aspect is viewed as a sign of the polymer and organic solar cell field as being more complex and less mature and it raises the question of whether an organic analog to a successful inorganic technology is forcibly needed and indeed whether it is at all worth exploring beyond academia.

Frederik C. Krebs; Mikkel Jørgensen

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Photoelectrochemical solar cells  

Science Journals Connector (OSTI)

Photoelectrochemical solar cells ... Plastic Solar Cells: A Multidisciplinary Field To Construct Chemical Concepts from Current Research ... Plastic Solar Cells: A Multidisciplinary Field To Construct Chemical Concepts from Current Research ...

John T. McDevitt

1984-01-01T23:59:59.000Z

182

A Bifunctional Copolymer Additive to Utilize Photoenergy Transfer and To Improve Hole Mobility for Organic Ternary Bulk-Heterojunction Solar Cell  

Science Journals Connector (OSTI)

A Bifunctional Copolymer Additive to Utilize Photoenergy Transfer and To Improve Hole Mobility for Organic Ternary Bulk-Heterojunction Solar Cell ... Over the past decade, organic photovoltaics (OPVs) have attracted significant attention for the production of solar energy owing to their potential advantages, such as low cost, flexibility, lightweight, large area, and simple processability. ... within the active layer blend and produce solar cells with high series resistances and low overall PCEs. ...

Cheng-Yu Chi; Ming-Chung Chen; Der-Jang Liaw; Han-Yu Wu; Ying-Chi Huang; Yian Tai

2014-07-17T23:59:59.000Z

183

Morphology-dependent light trapping in thin-film organic solar cells  

Science Journals Connector (OSTI)

The active layer materials used in organic photovoltaic (OPV) cells often self-assemble into highly ordered morphologies, resulting in significant optical anisotropies. However, the...

Grote, Richard R; Brown, Steven J; Driscoll, Jeffrey B; Osgood, Richard M; Schuller, Jon A

2013-01-01T23:59:59.000Z

184

Design of light-trapping microscale-textured surfaces for efficient organic solar cells  

Science Journals Connector (OSTI)

Organic photovoltaic (OPV) cells suffer from low charge carrier mobilities of polymers, which renders it important to achieve complete optical absorption in active layers thinner...

Nalwa, Kanwar S; Chaudhary, Sumit

2010-01-01T23:59:59.000Z

185

Highly transparent Nb-doped indium oxide electrodes for organic solar cells  

SciTech Connect (OSTI)

The authors investigated the characteristics of Nb-doped In{sub 2}O{sub 3} (INbO) films prepared by co-sputtering of Nb{sub 2}O{sub 5} and In{sub 2}O{sub 3} for use in transparent anodes for organic solar cells (OSCs). To optimize the Nb dopant composition in the In{sub 2}O{sub 3} matrix, the effect of the Nb doping power on the resistivity and transparency of the INbO films were examined. The electronic structure and microstructure of the INbO films were also investigated using synchrotron x-ray absorption spectroscopy and x-ray diffraction examinations in detail. At the optimized Nb co-sputtering power of 30?W, the INbO film exhibited a sheet resistance of 15??/sq, and an optical transmittance of 86.04% at 550?nm, which are highly acceptable for the use as transparent electrodes in the fabrication of OSCs. More importantly, the comparable power conversion efficiency (3.34%) of the OSC with an INbO anode with that (3.31%) of an OSC with a commercial ITO anode indicates that INbO films are promising as a transparent electrode for high performance OSCs.

Kim, Jun Ho; Seong, Tae-Yeon [Department of Materials Science and Engineering, Korea University, Seoul 136-713 (Korea, Republic of); Na, Seok-In [Professional Graduate School of Flexible and Printable Electronics, Chonbuk National University, 664-14, Deokjin-dong, Jeongju-si, Jellabuk-do 561-756 (Korea, Republic of); Chung, Kwun-Bum [Department of Physics, Dankook University, Mt. 29, Anseo-Dong, Chenan 330-714 (Korea, Republic of); Lee, Hye-Min; Kim, Han-Ki, E-mail: imdlhkkim@khu.ac.kr [Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, 1 Seocheon-dong, Yongin, Gyeonggi-do 446-701 (Korea, Republic of)

2014-03-15T23:59:59.000Z

186

Analyzing local exciton generation profiles as a means to extract transport lengths in organic solar cells  

Science Journals Connector (OSTI)

In this work, we determine the carrier-transport lengths of electrons and holes (Le,h) for bulk heterojunction (BHJ) organic solar cells using a method applicable to functional devices. By linking the local exciton generation profile [G(x)] in the photoactive layer to photocurrent losses, we are able to determine the onset of bimolecular recombination, which is the dominate loss process of free carrier transport. Even though many factors affect photocurrent generation, we single out bimolecular recombination by measuring the scaling of photocurrent with light intensity as a function of applied voltage. For the common BHJ system, annealed poly-3-hexylthiophene:[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM), a minimum for Le in PCBM is found to be 340 nm while Lh is estimated to be 90 nm for P3HT. The relationship between G(x) and carrier transport is further exemplified by demonstrating a scaling exponent below that for traditional space-charge-limited photocurrent. Likewise, by incorporating a drift/diffusion model, an intuitive link between G(x) and charge transport is established where recombination is shown to occur in regions of the photoactive layer far from the electrode of the slowest carrier species. Finally, the consequences of Le,h on device design for operation under 1 Sun conditions are described.

John R. Tumbleston; Doo-Hyun Ko; Edward T. Samulski; Rene Lopez

2010-11-19T23:59:59.000Z

187

Solution Processed Al-Doped ZnO Nanoparticles/TiOx Composite for Highly Efficient Inverted Organic Solar Cells  

Science Journals Connector (OSTI)

Solution Processed Al-Doped ZnO Nanoparticles/TiOx Composite for Highly Efficient Inverted Organic Solar Cells ... This metal-oxide composition, called AZOTi, has two important elements that benefit production of low cost devices. ... After successful utilization of AZOTi in the fabrication of optimized single layer P3HT/PCBM-inverted solar cells, we also fabricated tandem cells comprising ITO/AZOTi/P3HT/PCBM in the front cell and a blend of a low band gap polymer [2,1,3-benzothiadiazole-4,7-diyl [4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b?]dithiophene-2,6-diyl

Abay Gadisa; Travis Hairfield; Leila Alibabaei; Carrie L. Donley; Edward T. Samulski; Rene Lopez

2013-08-27T23:59:59.000Z

188

Solar cells  

DOE Patents [OSTI]

Organic photosensitive optoelectronic devices are disclosed. The devises are thin-film crystalline organic optoelectronic devices capable of generating a voltage when exposed to light, and prepared by a method including the steps of: depositing a first organic layer over a first electrode; depositing a second organic layer over the first organic layer; depositing a confining layer over the second organic layer to form a stack; annealing the stack; and finally depositing a second electrode over the second organic layer.

Peumans, Peter; Uchida, Soichi; Forrest, Stephen R.

2013-06-18T23:59:59.000Z

189

Increasing the efficiency of organic solar cells by photonic and electrostatic-field enhancements  

SciTech Connect (OSTI)

Organic photovoltaic (OPV) technology is an attractive solar-electric conversion paradigm due to the promise of low cost roll-to-roll production and amenability to flexible substrates. Power conversion efficiency (PCE) exceeding 7% has recently been achieved. OPV cells suffer from low charge carrier mobilities of polymers, leading to recombination losses, higher series resistances and lower fill-factors. Thus, it is imperative to develop fabrication methodologies that can enable efficient optical absorption in films thinner than optical absorption length. Active layers conformally deposited on light-trapping, microscale textured, grating-type surfaces is one possible approach to achieve this objective. In this study, 40% theoretical increase in photonic absorption over flat OPVs is shown for devices with textured geometry by the simulation results. For verifying this theoretical result and improving the efficiency of OPVs by light trapping, OPVs were fabricated on grating-type textured substrates possessing t pitch and -coat PV active-layer on these textured substrates led to over filling of the valleys and shunts at the crest, which severely affected the performance of the resultant PV devices. Thus, it is established that although the optical design is important for OPV performance but the potential of light trapping can only be effectively tapped if the textures are amenable for realizing a conformal active layer. It is discovered that if the height of the underlying topographical features is reduced to sub-micron regime (e.g. 300 nm) and the pitch is increased to more than a micron (e.g. 2 ?m), the textured surface becomes amenable to coating a conformal PV active-layer. The resultant PV cells showed 100% increase in average light absorption near the band edge due to trapping of higher wavelength photons, and 20% improvement in power conversion efficiency as compared with the flat PV cell. Another factor that severely limits the performance of OPVs is recombination of charge carriers. Thus it becomes imperative to understand the effect of processing conditions such as spin coating speed and drying rate on defect density and hence induced carrier recombination mechanism. In this study, It is shown that slow growth (longer drying time) of the active-layer leads to reduction of sub-bandgap traps by an order of magnitude as compared to fast grown active-layer. By coupling the experimental results with simulations, it is demonstrated that at one sun condition, slow grown device has bimolecular recombination as the major loss mechanism while in the fast grown device with high trap density, the trap assisted recombination dominates. It has been estimated that non-radiative recombination accounts nearly 50% of efficiency loss in modern OPVs. Generally, an external bias (electric field) is required to collect all the photogenerated charges and thus prevent their recombination. The motivation is to induce additional electric field in otherwise low mobility conjugated polymer based active layer by incorporating ferroelectric dipoles. This is expected to facilitate singlet exciton dissociation in polymer matrix and impede charge transfer exciton (CTE) recombination at polymer:fullerene interface. For the first time, it is shown that the addition of ferroelectric dipoles to modern bulk heterojunction (BHJ) can significantly improve exciton dissociation, resulting in a ~50% enhancement of overall solar cell efficiency. The devices also exhibit the unique ferroelectric-photovoltaic effect with polarization-controlled power conversion efficiency.

Nalwa, Kanwar

2012-11-03T23:59:59.000Z

190

Performance and Transport Properties of Phthalocyanine:Fullerene Organic Solar Cells  

Science Journals Connector (OSTI)

Copper phthalocyanine (CuPc)-fullerene (C60) photovoltaic cells are produced by organic vapour phase deposition reaching efficiencies of 3%. The electronic transport properties of the devices are investigated as ...

M. Rusu; J. Gasiorowski; S. Wiesner; D. Keiper…

2009-01-01T23:59:59.000Z

191

Effect of Organic and Inorganic Passivation in Quantum-Dot-Sensitized Solar Cells  

Science Journals Connector (OSTI)

This work was supported by the Institute of Nanotechnologies for Clean Energies (INCE), funded by the Generalitat Valenciana under Project ISIC/2012/008. ... We acknowledge projects CYTED-Nanoenergía, PAPIIT-IN106912 (UNAM-México), and CONACyT-153270 (México) for financial support. ... Quantum dot-sensitized solar cells (QDSSCs) are interesting energy devices because of their (i) impressive ability to harvest sunlight and generate multiple electron/hole pairs, (ii) ease of fabrication, and (iii) low cost. ...

Mauricio Solis de la Fuente; Rafael S. Sánchez; Victoria González-Pedro; Pablo P. Boix; S. G. Mhaisalkar; Marina E. Rincón; Juan Bisquert; Iván Mora-Seró

2013-04-12T23:59:59.000Z

192

Exciton Generation and Diffusion in Multilayered Organic Solar Cells Designed by Layer-by-Layer Assembly of Poly(p-phenylenevinylene)  

Science Journals Connector (OSTI)

Exciton Generation and Diffusion in Multilayered Organic Solar Cells Designed by Layer-by-Layer Assembly of Poly(p-phenylenevinylene) ... exciton generation; exciton diffusion; poly(p-phenylenevinylene); layer-by-layer assembly; organic solar cell ... The former solar cells are typically fabricated by solution processes such as spin coating of a blend solution of a conjugated polymer and a fullerene derivative (6) and therefore have attracted much attention because of their suitability for high-throughput production based on the printing and coating techniques (7). ...

Kohji Masuda; Yoshifumi Ikeda; Michihiro Ogawa; Hiroaki Benten; Hideo Ohkita; Shinzaburo Ito

2010-01-04T23:59:59.000Z

193

Organic dye-sensitized sponge-like TiO2 photoanode for dye-sensitized solar cells  

Science Journals Connector (OSTI)

...photoanode for dye-sensitized solar cells Jian Liu 1 Qiang Yang...Light harvesting inside a solar cell is crucial for overall...effects of polymerization-assisted assembly and flexible substrate...efficiency in dye-sensitized solar cells. Chem. Commun. 2005...

2013-01-01T23:59:59.000Z

194

NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL  

E-Print Network [OSTI]

in all thin-film solar cell technologies is that absorbancecells. These emerging solar cell technologies have undergonethe various solar cell technologies and their progress as

Phuyal, Dibya

2012-01-01T23:59:59.000Z

195

Achieving High Performance Polymer Tandem Solar Cells via Novel Materials Design  

E-Print Network [OSTI]

polymers for organic solar cell applications. Chem. Rev.Hummelen, J. C. , Plastic solar cells. Adv. Funct. Mater.Efficient inverted polymer solar cells. Appl. Phys. Lett.

Dou, Letian

2014-01-01T23:59:59.000Z

196

High-performance organic solar cells based on a low-bandgap poly-thienothiophene-benzodithiophene polymer and fullerene composite prepared by using the airbrush spray-coating technique  

Science Journals Connector (OSTI)

In the present work, we have demonstrated high-performance organic solar cells with spray coated active layers. The influence ... butyric acid (PC71BM) methyl ester bulk heterojunction solar cells is presented. A...

Palanisamy Kumar; Santhakumar Kannappan…

2013-04-01T23:59:59.000Z

197

Two examples of organic opto-electronic devices: Light emitting diodes and solar cells  

Science Journals Connector (OSTI)

Organic and polymeric (plastic) opto-electronic devices have been developed over the past decade and some of them have made the leap from the research laboratory to commercial use. We present a simple and inexpensive method of fabricating organic light emitting diodes and organic photovoltaic cells. The devices are fabricated by the deposition of solid films based on the fluorescent polymer MEH:PPV using the spin-coating technique. The films were sandwiched between electrodes one of which was made of Bi-Pb-Cd-Sn alloy. An overview of these two devices is also provided.

J. L. Maldonado; G. Ramos-Ortíz; M. L. Miranda; S. Vázquez-Córdova; M. A. Meneses-Nava; O. Barbosa-García; M. Ortíz-Gutiérrez

2008-01-01T23:59:59.000Z

198

An X-Ray Fluorescence Study on the Segregation of Cs and I in and Inverted Organic Solar Cell  

SciTech Connect (OSTI)

X-ray near-total-reflection fluorescence reveals that in multilayers of the inverted organic solar cell (ITO/CsI/P3HT:PCBM-based) Cs diffuses into the organic layer and iodide diffuses into the ITO. Laser ablation inductively coupled plasma mass spectrometry measurements, which integrate elemental concentration across the whole multilayer structure, indicate that the Cs:I ratio remains 1:1 confirming there is no loss of iodine from the sample. Iodide diffusion to the bulk ITO layer is also found in a similarly prepared ITO/NaI/P3HT:PCBM multilayer structure. Our results are consistent with recent XPS measurements which show that the Cs:I ratio at the ITO/CsI surface exceeds 8:1, and rationalize this observation.

Lindemann, William R. [Ames Laboratory; Xiao, Teng [Ames Laboratory; Wang, Wenjie [Ames Laboratory; Berry, Jonna E. [Ames Laboratory; Anderson, Nathaniel A. [Ames Laboratory; Houk, Robert S. [Ames Laboratory; Shinar, Ruth [Ames Laboratory; Shinar, Joseph [Ames Laboratory; Vaknin, David [Ames Laboratory

2013-10-08T23:59:59.000Z

199

Surface Treatment of NiO Hole Transport Layers for Organic Solar Cells  

SciTech Connect (OSTI)

Recent advances in the power-conversion efficiency of organic photovoltaics (OPVs) has largely been realized through the development of conjugated polymer absorber materials that provide for increased overlap with the solar spectrum as well as proper energy level offset with the electron acceptor. These allow for increased photocurrent and photovoltage, thus resulting in increased performance. Such systems could further be improved through the application of contact materials that have been tuned to minimize losses in carrier and potential losses at the charge-extraction interfaces. To date, these devices continue to use contacts that have not been optimized for the specific active layer components employed. Here, we demonstrate that the electrical and contact properties of NiO can be tuned through careful control of the deposition parameters as well as through surface treatments. The effects of the NiO thin-film processing and properties are investigated for application as a hole transport layer (HTL) in poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester OPV devices. Devices based on the NiO HTLs demonstrate equal performance to those employing poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) HTLs. Furthermore, the NiO HTLs enable the application of zinc-oxide-based materials as transparent electrodes.

Berry, Joseph J.; Widjonarko, N. Edwin; Bailey, Brian A.; Sigdel, Ajaya K.; Ginley, David S.; Olson, Dana C.

2010-01-01T23:59:59.000Z

200

Process for Fabrication of Efficient Solar Cells - Energy Innovation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to provide low-cost solar energy conversion, flexibility, manufacturability, and are light weight. However, the efficiency of organic solar cells is about 4-6%, and increasing...

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Spectral sensitization of nanocrystalline solar cells  

DOE Patents [OSTI]

This invention relates to dye sensitized polycrystalline photoelectrochemical solar cells for use in energy transduction from light to electricity. It concerns the utility of highly absorbing organic chromophores as sensitizers in such cells and the degree to which they may be utilized alone and in combination to produce an efficient photoelectrochemical cell, e.g., a regenerative solar cell.

Spitler, Mark T. (Concord, MA); Ehret, Anne (Malden, MA); Stuhl, Louis S. (Bedford, MA)

2002-01-01T23:59:59.000Z

202

Heterojunction solar cell  

DOE Patents [OSTI]

A high-efficiency single heterojunction solar cell is described wherein a thin emitter layer (preferably Ga[sub 0.52]In[sub 0.48]P) forms a heterojunction with a GaAs absorber layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the emitter layer. 1 fig.

Olson, J.M.

1994-08-30T23:59:59.000Z

203

Nanocrystal Solar Cells  

E-Print Network [OSTI]

research on organic photovoltaic cells since small molecule10 years prior (4). Photovoltaic cells with an active layerof the associated photovoltaic cells. 2.4 Charge transport

Gur, Ilan

2006-01-01T23:59:59.000Z

204

The Design of Organic Polymers and Small Molecules to Improve the Efficiency of Excitonic Solar Cells.  

E-Print Network [OSTI]

??The harvesting of solar energy using photovoltaics has the potential to provide a significant portion of the world's energy. For this to happen, the cost… (more)

Armstrong, Paul Barber

2010-01-01T23:59:59.000Z

205

Built-in voltage of organic bulk heterojuction p-i-n solar cells measured by electroabsorption spectroscopy  

SciTech Connect (OSTI)

We investigate the influence of the built-in voltage on the performance of organic bulk heterojuction solar cells that are based on a p-i-n structure. Electrical doping in the hole and the electron transport layer allows to tune their work function and hence to adjust the built-in voltage: Changing the doping concentration from 0.5 to 32 wt% induces a shift of the work function towards the transport levels and increases the built-in voltage. To determine the built-in voltage, we use electroabsorption spectroscopy which is based on an evaluation of the spectra caused by a change in absorption due to an electric field (Stark effect). For a model system with a bulk heterojunction of BF-DPB and C{sub 60}, we show that higher doping concentrations in both the electron and the hole transport layer increase the built-in voltage, leading to an enhanced short circuit current and solar cell performance.

Siebert-Henze, E., E-mail: ellen.siebert@iapp.de; Lyssenko, V. G.; Fischer, J.; Tietze, M.; Brueckner, R.; Schwarze, M.; Vandewal, K.; Ray, D.; Riede, M.; Leo, K. [Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden (Germany)] [Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden (Germany)

2014-04-15T23:59:59.000Z

206

PEDOT:PSS top electrode prepared by transfer lamination using plastic wrap as the transfer medium for organic solar cells  

Science Journals Connector (OSTI)

Abstract We report on the film preparation of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) by transfer lamination using plastic wrap as the transfer medium. Comparing with the commonly used polydimethylsiloxane (PDMS) transfer medium, the plastic wrap is cheaper, easier to access and for mass production. The surface of plastic wrap is less hydrophobic than that of PDMS, aqueous PEDOT:PSS solution with 0.5 wt.% surfactant can wet the plastic wrap well. No plasma or ultraviolet ozone treatment is needed on the plastic wrap prior to the coating of PEDOT:PSS, while plasma treatment is necessary when PDMS is used transfer medium. That simplifies the fabrication process. Organic solar cells with the PEDOT:PSS top electrode transferred using plastic wrap transfer medium exhibit an averaged fill factor of 0.60 and an averaged power conversion efficiency of 4.0%, comparable to that of reference solar cells with PDMS as transfer medium for PEDOT:PSS transfer.

Liyuan Yin; Zhixin Zhao; Fangyuan Jiang; Zaifang Li; Sixing Xiong; Yinhua Zhou

2014-01-01T23:59:59.000Z

207

A chlorophyll solar cell  

Science Journals Connector (OSTI)

A simple chlorophyll solar cell has been designed built and tested. A voltage output versus time curve has also been obtained. (AIP)

J. Christopher Ludlow

1982-01-01T23:59:59.000Z

208

Quantum Junction Solar Cells  

Science Journals Connector (OSTI)

Quantum Junction Solar Cells ... § Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario, M5S 3G4, Canada ...

Jiang Tang; Huan Liu; David Zhitomirsky; Sjoerd Hoogland; Xihua Wang; Melissa Furukawa; Larissa Levina; Edward H. Sargent

2012-08-10T23:59:59.000Z

209

Efficient optical absorption enhancement in organic solar cells by using a 2-dimensional periodic light trapping structure  

SciTech Connect (OSTI)

We have investigated the effects induced by periodic nanosphere arrays on the performance of organic solar cells (OSCs). Two-dimensional periodic arrays of polystyrene nanospheres were formed by using a colloidal lithography method together with plasma etching to trim down the size to various degrees on the substrates of OSCs. It is found that the devices prepared on such substrates can have improved light harvesting, resulting in as high as 35% enhancement in power conversion efficiency over that of the reference devices. The measured external quantum efficiency and finite-difference time-domain simulation reveal that the controlled periodic morphology of the substrate can efficiently increase light scattering in the device and thus enhance the absorption of incident light.

Zu, Feng-Shuo [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123 (China); Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR (China); Shi, Xiao-Bo; Liang, Jian; Xu, Mei-Feng; Wang, Zhao-Kui, E-mail: lsliao@suda.edu.cn, E-mail: zkwang@suda.edu.cn, E-mail: apcslee@cityu.edu.hk; Liao, Liang-Sheng, E-mail: lsliao@suda.edu.cn, E-mail: zkwang@suda.edu.cn, E-mail: apcslee@cityu.edu.hk [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123 (China); Lee, Chun-Sing, E-mail: lsliao@suda.edu.cn, E-mail: zkwang@suda.edu.cn, E-mail: apcslee@cityu.edu.hk [Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR (China)

2014-06-16T23:59:59.000Z

210

Solution-processed silver nanowires as a transparent conducting electrode for air-stable inverted organic solar cells  

Science Journals Connector (OSTI)

Abstract Highly efficient and air-stable inverted organic solar cells (IOSCs) were fabricated using solution-processed silver nanowire electrodes. The electrodes showed a low sheet resistance of ~ 16 ? sq? 1 and a high transmittance of ~ 95% at a wavelength of 550 nm. A solution-processed ZnO buffer layer is typically used for electron transport and effective passivation of the surface of Ag NW electrodes. The device performance of the \\{IOSCs\\} that used these Ag NW electrodes, which were fabricated on a glass or plastic substrate, was > 94% of that of devices containing indium tin oxide (ITO) electrodes. This indicates that solution-processed Ag NW electrode can replace commercialized ITO and can be utilized in roll-to-roll and large-area fabrication processes.

Myungkwan Song; Jong-Kuk Kim; Shi-Young Yang; Jae-Wook Kang

2014-01-01T23:59:59.000Z

211

Investigation of aged organic solar cell stacks by cross-sectional transmission electron microscopy coupled with elemental analysis  

Science Journals Connector (OSTI)

Polymer solar cells are of great interest as candidates for...61...-butyric acid methyl ester (P3HT and PCBM, respectively). Phase segregation of the blend has been extensively investigated by transmission electr...

P. Favia; E. Voroshazi; P. Heremans; H. Bender

2013-04-01T23:59:59.000Z

212

Precision synthesis of tailor-made polythiophene-based materials and their application to organic solar cells  

Science Journals Connector (OSTI)

Polymer-based solar cells (PSCs) have been promising candidates as renewable energy resources, having multiple advantages of flexible, low-cost and large-area processing for their mass production. Among them, ...

Tomoya Higashihara; Mitsuru Ueda

2013-03-01T23:59:59.000Z

213

Radiative cooling of solar cells  

Science Journals Connector (OSTI)

Standard solar cells heat up under sunlight. The resulting increased temperature of the solar cell has adverse consequences on both its efficiency and its reliability. We introduce a...

Zhu, Linxiao; Raman, Aaswath; Wang, Ken Xingze; Anoma, Marc Abou; Fan, Shanhui

2014-01-01T23:59:59.000Z

214

Solid-State Photogalvanic Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

Solid-State Photogalvanic Dye-Sensitized Solar Cells ... photogalvanic; dye-sensitized; solar cells; thermal; electron; transfer ... (3) Modern organic photovoltaic solar cells, wherein charge separation occurs in a photoactive layer of organic semiconductor material and must migrate to collecting electrodes,(4) can be regarded as solid-state photogalvanic cells. ...

Seare A. Berhe; Habtom B. Gobeze; Sundari D. Pokharel; Eunsol Park; W. Justin Youngblood

2014-05-29T23:59:59.000Z

215

Resonant cavity enhanced light harvesting in flexible thin-film organic solar cells  

E-Print Network [OSTI]

of solar energy conversion be- cause they use thin films of photoactive material and can be manufactured achieving complete optical absorption and good carrier transport. A photoactive film thickness of 200 nm charge transport to allow for complete carrier extraction. To address this trade-off, absorption en

Fan, Shanhui

216

The origin of efficiency enhancement of inorganic/organic Hybrid solar Cells by robust samarium phosphate nanophosphors  

Science Journals Connector (OSTI)

Abstract An effective energy level regulation of acceptor by doping samarium phosphate nanophosphors (SmPO4 NPs) was reported for inorganic/organic hybrid solar cell applications. SmPO4 \\{NPs\\} doped TiO2/P3HT bulk heterojunction (BHJ) solar cell shows an enhanced power conversion efficiency of approaching 3% as compared with that of its counterpart without SmPO4 \\{NPs\\} (1.98%). The underlying photophysical mechanism was probed by applying femtosecond transient absorption spectroscopy and the results show that the efficiency enhancement was ascribed to the improved hot electron, less energetic electron, hole transports at the interface of BHJ apart from down-conversion photoluminescence of SmPO4 NPs. It has been evidenced that the hot electron transfer life time was shortened by more than 40% (i.e., from ?hot-e=30.2 to 17.9 ps) than pure TiO2 acceptor while the hole transfer lifetime was boosted by almost 20% (i.e., from 6.92 to 5.58 ns). Such charge carrier improvements stem from the efficient energy level regulations by SmPO4 NPs. In detail, the conduction band (CB) edge of TiO2 has been elevated by 0.57 eV while the valence band (VB) edge has been elevated by 0.32 eV, thus not only narrowing down the energy offset between CB energy levels of acceptor TiO2 and donor P3HT, but also meanwhile enlarging the band gap of TiO2 itself that permits to inhibit electron-hole recombination within TiO2. This work demonstrates that samarium ions can efficiently facilitate exciton generation, dissociation and charge transport and have an important role in enhancing photovoltaic performance.

Qinghua Li; Yongbiao Yuan; Taihuei Wei; Yue Li; Zihan Chen; Xiao Jin; Yuancheng Qin; Weifu Sun

2014-01-01T23:59:59.000Z

217

Tetrapropyl-tetraphenyl-diindenoperylene derivative as a green absorber for high-voltage stable organic solar cells  

Science Journals Connector (OSTI)

We present small molecule organic solar cells (SMOSC) based on flat heterojunctions (FHJ) of the alternative green donor 2,3,10,11-tetrapropyl-1,4,9,12-tetraphenyl-diindeno[1,2,3-cd:1’,2’,3’-lm]perylene (P4-Ph4-DIP) and the fullerene C60. P4-Ph4-DIP absorbs in the green spectral range and thus fills the spectral gap that standard absorber materials (zinc or copper phthalocyanine for red and C60 for blue absorption) leave, thus allowing broad coverage of the sun spectrum, which is of major interest for tandem devices. The materials properties of P4-Ph4-DIP are studied, and SMOSC are characterized by current voltage, external quantum efficiency, and aging measurements. The solar cells display very high fill factors FF > 76% and open circuit voltages VOC of close to 1 V. Mismatch-corrected efficiencies of up to 1.9% are obtained. Aging measurements show that C60 in conjunction with P4-Ph4-DIP yields extremely stable devices. We observe ? 88% of the initial efficiency after 2500 h illumination at 999 mW/cm2 illumination intensity, with no observable change in short-circuit current density. Furthermore, we also show that a systematic variation of donor thickness in FHJ can be combined with transfer matrix formalism-based optical simulations and the continuity equation for excitons to reliably determine the exciton diffusion length LD. A value of 9 ± 1 nm is found for P4-Ph4-DIP.

Jan Meiss; Martin Hermenau; Wolfgang Tress; Christoph Schuenemann; Franz Selzer; Markus Hummert; Joerg Alex; Gerhard Lackner; Karl Leo; Moritz Riede

2011-04-11T23:59:59.000Z

218

Schottky behavior of organic solar cells with different cathode deposition methods.  

E-Print Network [OSTI]

?? During the last decade, organic photovoltaic research has attracted attention and power conversion efficiencies have shown strong growth. This growth has attracted economic and… (more)

Anishetty, Laxman

2011-01-01T23:59:59.000Z

219

Comparing plasmonic and dielectric gratings for absorption enhancement in thin-film organic solar cells  

Science Journals Connector (OSTI)

We theoretically investigate and compare the influence of square silver gratings and one-dimensional photonic crystal (1D PC) based nanostructures on the light absorption of organic...

Le, Khai Q; Abass, Aimi; Maes, Bjorn; Bienstman, Peter; Alù, Andrea

2012-01-01T23:59:59.000Z

220

Effects of ZnO Nanoparticles on P3HT:PCBM Organic Solar Cells with DMF-Modulated PEDOT:PSS Buffer Layers  

Science Journals Connector (OSTI)

Organic solar cells based on bulk heterojunctions (BHJs) have been investigated because of their low cost, environmentally friendly production, ease of deposition, and flexible applications. ... The best performance with this cell structure produced an open-circuit voltage, Voc, of 440 mV, a short circuit c.d., Jsc, of 2.2 mA/cm2, a fill factor, FF, of 0.56, and a conversion efficiency, ?, of 0.53%. ...

Sang Hoon Oh; Seung Jin Heo; Jeong Suk Yang; Hyun Jae Kim

2013-10-31T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications  

E-Print Network [OSTI]

We fabricate near-infrared absorbing organic photovoltaics that are highly transparent to visible light. By optimizing near-infrared optical-interference, we demonstrate power efficiencies of 1.3±0.1% with simultaneous ...

Lunt, Richard R.

222

Overview and Highlights of WOLEDs and Organic Solar Cells: From Research to Applications  

Science Journals Connector (OSTI)

Solid-state organic devices are at the vanguard of new ... onto flexible substrates that potentially reduce the mass production cost for large modules. With the great ... the realistic requirements for commercial...

Maggie Mei-Yee Chan; Chi-Hang Tao; Vivian Wing-Wah Yam

2010-01-01T23:59:59.000Z

223

Light management using nano- and micro-structures in organic solar cells  

Science Journals Connector (OSTI)

The major drawback of thin-film photovoltaic cells is their relatively low light absorption. We discuss multi-scale optical engineering schemes combining the advantages of both...

Lee, Jung-Yong

224

Thermal Management of Solar Cells  

E-Print Network [OSTI]

D. Mills, "Cooling of photovoltaic cells under concentratedelectric performance of a photovoltaic cells by cooling andSolar Cell A photovoltaic cell is a semiconductor that

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

225

Solar cell array interconnects  

DOE Patents [OSTI]

Electrical interconnects are disclosed for solar cells or other electronic components using a silver-silicone paste or a lead-tin (Pb-Sn) no-clean fluxless solder cream, whereby the high breakage of thin (<6 mil thick) solar cells using conventional solder interconnect is eliminated. The interconnects of this invention employs copper strips which are secured to the solar cells by a silver-silicone conductive paste which can be used at room temperature, or by a Pb-Sn solder cream which eliminates undesired residue on the active surfaces of the solar cells. Electrical testing using the interconnects of this invention has shown that no degradation of the interconnects developed under high current testing, while providing a very low contact resistance value. 4 figs.

Carey, P.G.; Thompson, J.B.; Colella, N.J.; Williams, K.A.

1995-11-14T23:59:59.000Z

226

Photovoltaic solar cell  

DOE Patents [OSTI]

A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electicity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

Nielson, Gregory N; Okandan, Murat; Cruz-Campa, Jose Luis; Resnick, Paul J

2013-11-26T23:59:59.000Z

227

Photovoltaic solar cell  

DOE Patents [OSTI]

A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electricity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

Nielson, Gregory N; Cruz-Campa, Jose Luis; Okandan, Murat; Resnick, Paul J

2014-05-20T23:59:59.000Z

228

Novel Polymer Gel Electrolyte with Organic Solvents for Quasi-Solid-State Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

Dye-sensitized solar cells (DSSCs) have received attention due to their attractive features, such as high energy conversion efficiency, possible low cost of production, and environment friendly nature; these advantages make them attractive to substitute conventional silicone photovoltaics as a new solar energy source. ... At the same time, it avoids the disadvantages of liquid-state DSSC. ... advantage that they act as a binder for the electrodes. ...

Sheng-Yen Shen; Rui-Xuan Dong; Po-Ta Shih; Vittal Ramamurthy; Jiang-Jen Lin; Kuo-Chuan Ho

2014-10-09T23:59:59.000Z

229

SunShot Initiative: Dye-Sensitized Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dye-Sensitized Solar Cells to Dye-Sensitized Solar Cells to someone by E-mail Share SunShot Initiative: Dye-Sensitized Solar Cells on Facebook Tweet about SunShot Initiative: Dye-Sensitized Solar Cells on Twitter Bookmark SunShot Initiative: Dye-Sensitized Solar Cells on Google Bookmark SunShot Initiative: Dye-Sensitized Solar Cells on Delicious Rank SunShot Initiative: Dye-Sensitized Solar Cells on Digg Find More places to share SunShot Initiative: Dye-Sensitized Solar Cells on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Crystalline Silicon Thin Films Multijunctions Organic Photovoltaics Dye-Sensitized Solar Cells Competitive Awards Systems Integration Balance of Systems Dye-Sensitized Solar Cells Graphic showing the seven layers of a dye-sensitized PV cell: electrode, hole conductor, dope, TiO2, blocking layer, transparent conductive oxide, and glass.

230

Thin silicon solar cells  

SciTech Connect (OSTI)

The silicon-film design achieves high performance by using a dun silicon layer and incorporating light trapping. Optimally designed thin crystalline solar cells (<50 microns thick) have performance advantages over conventional thick devices. The high-performance silicon-film design employs a metallurgical barrier between the low-cost substrate and the thin silicon layer. Light trapping properties of silicon-film on ceramic solar cells are presented and analyzed. Recent advances in process development are described here.

Hall, R.B.; Bacon, C.; DiReda, V.; Ford, D.H.; Ingram, A.E.; Cotter, J.; Hughes-Lampros, T.; Rand, J.A.; Ruffins, T.R.; Barnett, A.M. [Astro Power Inc., Solar Park, Newark, DE (United States)

1992-12-01T23:59:59.000Z

231

Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation Print Wednesday,...

232

Probing Nanostructures for Photovoltaics: Using atomic force microscopy and other tools to characterize nanoscale materials for harvesting solar energy  

E-Print Network [OSTI]

4.2.1 Organic solar cellOrganic Solar Cells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3.1 Organic solar cell materials . . . . .

Zaniewski, Anna Monro

2012-01-01T23:59:59.000Z

233

The impact of thermal annealing temperature on the low-frequency noise characteristics of P3HT:PCBM bulk heterojunction organic solar cells  

Science Journals Connector (OSTI)

Abstract We investigate the dark low-frequency noise characteristics of P3HT:PCBM bulk heterojunction organic solar cells in both forward and reverse bias conditions. The current noise power spectral density (SI) is “1/f”-like and is compared among cells annealed at different temperatures (60 °C to 140 °C). The asymmetric relationship of SI versus DC dark current (IDC) can be explained by the competition between the recombination current noise and tunneling current noise. Among the different annealing temperatures, we find that higher annealing temperature yields smaller ratio of the Hooge parameter to the carrier recombination lifetime, which is reflected in the forward bias SI versus IDC relationship. We demonstrate that the low-frequency noise can serve as a non-destructive diagnostic indicator of the performance of organic solar cells.

Lijun Li; Yang Shen; Joe C. Campbell

2014-01-01T23:59:59.000Z

234

Conducting polymer and hydrogenated amorphous silicon hybrid solar cells  

E-Print Network [OSTI]

November 2005 An organic-inorganic hybrid solar cell with a p-i-n stack structure has been investigated for their potential in electronic devices such as organic light emitting diodes OLEDs , solar cells, photode- tectorsConducting polymer and hydrogenated amorphous silicon hybrid solar cells Evan L. Williams

Schiff, Eric A.

235

The Design of Organic Polymers and Small Molecules to Improve the Efficiency of Excitonic Solar Cells  

E-Print Network [OSTI]

1044. [13] Rajaram, S. ; Armstrong, P. B. ; Kim, B. J. ;7. [8] (a) Scully, S. R. ; Armstrong, P. B. ; Edder, C. ;Cells by Paul Barber Armstrong A dissertation submitted in

Armstrong, Paul Barber

2010-01-01T23:59:59.000Z

236

Incorporation of nanovoids into metallic gratings for broadband plasmonic organic solar  

E-Print Network [OSTI]

Incorporation of nanovoids into metallic gratings for broadband plasmonic organic solar cells investigation and optimization of a newly proposed plasmonic organic solar cell geometry based. Kietzke, "Recent advances in organic solar cells," Adv. Optoelectron. 2007, 40285 (2007). 2. P. E. Shaw, A

Park, Namkyoo

237

The Effect of Solution Processing on the Power Conversion Efficiency of P3HT-based Organic Solar Cells  

Science Journals Connector (OSTI)

Abstract Chloroform, Chlorobenzene, 1, 2-Dichlorobenze and co-solvent Chlorobenzene with Chloroform (1:1) were used to investigate the influence of the solvent on the morphology of P3HT:PCBM (with the ratio 1:1) as well as the photovoltaic properties of organic solar cells based on this polymer blend. Using co-solvents leads to higher absorption intensity as compared to other studied solvents. XRD measurements reveal improved crystallinity in P3HT films prepared by chloroform and chlorobenzene while large aggregates appeared in films prepared using dichlorobenzene. Films produced using co-solvents show well-ordered structure and improved crystallinity; these results were further confirmed by SEM images. The J(V) measurements show that a maximum PCE of 1.47% is obtained in films produced using co-solvents. This was associated with significant improvement in current density (11.77 mA/cm2) and a fill factor of 0.4 which was determined from the series and shunt resistances. Open circuit voltage has decreased in film prepared by co-solvents (0.31 Volt), and improved significantly (0.54 Volt) in film prepared in chloroform.

Burak Y. Kadem; Mohammed K. Al-hashimi; A.K. Hassan

2014-01-01T23:59:59.000Z

238

Molecular Engineering of Organic Dyes for Improved Recombination Lifetime in Solid-State Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

Metal-free dyes are advantageous because of their high molar extinction coefficients, ease of modification and engineering, lower cost and environmental impact, and increased performance in solid-state dye-sensitized solar cells (ssDSSCs). ... The operating principle of a ssDSSC: (1) upon absorption of light, the dye generates an exciton; (2) the excited electron is injected into the conduction band of the TiO2; (3) the dye is regenerated by the hole-transporting material (HTM); and (4) the charges percolate to the electrodes. ... The effect of hole transport material pore filling on photovoltaic performance in solid-state dye-sensitized solar cells ...

William H. Nguyen; Colin D. Bailie; Julian Burschka; Thomas Moehl; Michael Grätzel; Michael D. McGehee; Alan Sellinger

2013-04-15T23:59:59.000Z

239

Ideal Configuration For Nanoscale Solar Cells - Energy Innovation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SummaryThe standard design of excitonic solar cells, which includes most organic-based solar cells, is ideal in only two out of three dimensions. In other words, excitons can...

240

The solar cell in hornet cuticle: nanometer to micrometer scale  

Science Journals Connector (OSTI)

......1999) Ciliary hair cells and cuticular photoreceptor...of the nature's ; 7 solar cells; the thermophotovoltaic...Sede Boqer Symposia on Solar Electricity Production. 12- d e v i c e...1999 > Biodegradable organic polymers produced by......

Jacob S. Ishay; Eyal Rosenzweig; Luba Litinetsky; Shira Kirshboim

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 06 · Solar Cell Materials & Structures 1Montana State University: Solar Cells Lecture 6: Solar Cells Solar Cell Technologies · A) Crystalline Silicon · B) Thin Film · C) Group III-IV Cells 2Montana State University: Solar Cells Lecture 6: Solar

Kaiser, Todd J.

242

Modeling morphology evolution during solvent-based fabrication of organic solar cells  

E-Print Network [OSTI]

Solvent-based techniques usually involve preparing dilute blends of electron-donor and electron-acceptor materials dissolved in a volatile solvent. After some form of coating onto a substrate, the solvent evaporates. An initially homogeneous mixture separates into electron-acceptor rich and electron-donor rich regions as the solvent evaporates. Depending on the specifics of the blend and processing conditions different morphologies are typically formed. Experimental evidence consistently confirms that the morphology critically affects device performance. A computational framework that can predict morphology evolution can significantly augment experimental analysis. Such a framework will also allow high throughput analysis of the large phase space of processing parameters, thus yielding insight into the process-structure-property relationships. In this paper, we formulate a computational framework to predict evolution of morphology during solvent-based fabrication of organic thin films. This is accomplished by...

Wodo, Olga

2011-01-01T23:59:59.000Z

243

Broad spectrum solar cell  

DOE Patents [OSTI]

An alloy having a large band gap range is used in a multijunction solar cell to enhance utilization of the solar energy spectrum. In one embodiment, the alloy is In.sub.1-xGa.sub.xN having an energy bandgap range of approximately 0.7 eV to 3.4 eV, providing a good match to the solar energy spectrum. Multiple junctions having different bandgaps are stacked to form a solar cell. Each junction may have different bandgaps (realized by varying the alloy composition), and therefore be responsive to different parts of the spectrum. The junctions are stacked in such a manner that some bands of light pass through upper junctions to lower junctions that are responsive to such bands.

Walukiewicz, Wladyslaw (Kensington, CA); Yu, Kin Man (Lafayette, CA); Wu, Junqiao (Richmond, CA); Schaff, William J. (Ithaca, NY)

2007-05-15T23:59:59.000Z

244

NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL  

E-Print Network [OSTI]

is mostly thin- film solar technology, such as CdTe and CuInimportant. Thin film solar technology such as CIGS (Copper,in all thin-film solar cell technologies is that absorbance

Phuyal, Dibya

2012-01-01T23:59:59.000Z

245

Zinc Oxide Modified with Benzylphosphonic Acids as Transparent Electrodes in Regular and Inverted Organic Solar Cell Structures  

E-Print Network [OSTI]

An approach is presented to modify the WF of solution-processed sol-gel derived ZnOover an exceptionally wide range of more than 2.3 eV. This approach relies on the formation of dense and homogeneous self-assembled monolayers based on phosphonic acids with different dipole moments. This allows us to apply ZnO as charge selective bottom electrodes in either regular or inverted solar cell structures, using P3HT:PCBM as the active layer. These devices compete with or even exceed the performance of the reference cell on ITO/PEDOT:PSS. Our finding challenges the current view that bottom electrodes in inverted solar cells need to be electron-blocking for good device performance.

Ilja Lange; Sina Reiter; Juliane Kniepert; Fortunato Piersimoni; Michael Paetzel; Jana Hildebrandt; Thomas Brenner; Stefan Hecht; Dieter Neher

2015-02-05T23:59:59.000Z

246

Monolithic tandem solar cell  

SciTech Connect (OSTI)

It is an object of the invention to provide a monolithic tandem photovoltaic solar cell which is highly radiation resistant and efficient; in which the energy bandgap of the lower subcell can be tailored for specific applications; solar cell comprising layers of InP and GaInAsP (or GaInAs), where said photovoltaic cell is useful, for example, in space power applications; having an improved power-to-mass ratio; in which subcells are lattice-matches; and are both two terminal and three terminal monolithic tandem photovoltaic solar cells. To achieve the foregoing and other objects and in accordance with the purpose of the present invention, as embodied and broadly described herein, the monolithic tandem photovoltaic solar cell may comprise; (a) an InP substrate having an upper surface; (b) a first photoactive subcell on the upper surface of the InP substrate; wherein the first subcell comprises GaInAs (which could include GaInAsP) and includes a homojunction; and (c) a second photoactive subcell on the first subcell; wherein the second subcell comprises InP and includes a homojunction. The cell is described in detail. 5 figs., 2 tabs.

Wanlass, M.W.

1989-11-03T23:59:59.000Z

247

Solar-Driven Microbial Photoelectrochemical Cells with a Nanowire Photocathode  

E-Print Network [OSTI]

Solar-Driven Microbial Photoelectrochemical Cells with a Nanowire Photocathode Fang Qian,* Gongming cell (solar MPC) that can produce sustainable energy through coupling the microbial catalysis of biodegradable organic matter with solar energy conversion. The solar MPC consists of a p-type cuprous oxide

Li, Yat

248

Biomimetic Dye Molecules for Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

249

Biomimetic Dye Molecules for Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

250

Biomimetic Dye Molecules for Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

251

Biomimetic Dye Molecules for Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

252

Biomimetic Dye Molecules for Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

253

Biomimetic Dye Molecules for Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

254

Monolithic tandem solar cell  

SciTech Connect (OSTI)

This patent describes a single-crystal, monolithic, tandem, photovoltaic solar cell which includes an InP substrate having an upper and lower surfaces, a first photoactive subcell on the upper surface of the InP substrate, and a second photoactive subcell on the first subcell. The first photovoltaic subcell is GaInAsP of defined composition. The second subcell is InP. The two subcells are lattice matched. The solar cell can be provided as a two- terminal device or a three-terminal device.

Wanlass, M.W.

1991-05-28T23:59:59.000Z

255

Meteorological Effects on Solar Cells  

Science Journals Connector (OSTI)

30 June 1977 research-article Meteorological Effects on Solar Cells J. R. Mallinson P. T. Landsberg The effect of different meteorological conditions on solar cell outputs has been investigated...

1977-01-01T23:59:59.000Z

256

Solar Cell Simulation  

K-12 Energy Lesson Plans and Activities Web site (EERE)

Students model the flow of energy from the sun as it enters a photovoltaic cell, moves along a wire and powers a load. The game-like atmosphere involves the younger students and helps them understand the continuous nature of the flow of energy. For a related lesson, please see the activity “Solar Powered System” (PDF 430 KB).

257

MORE POLYSILICON FOR SOLAR CELLS  

Science Journals Connector (OSTI)

MORE POLYSILICON FOR SOLAR CELLS ... MANUFACTURING: OCI and Wacker expand raw material capacity in South Korea and U.S. ...

MELODY VOITH

2010-12-20T23:59:59.000Z

258

Meteorological Effects on Solar Cells  

Science Journals Connector (OSTI)

...research-article Meteorological Effects on Solar Cells J. R. Mallinson P. T. Landsberg...different meteorological conditions on solar cell outputs has been investigated, using a model for a solar cell (p-on-n or n-on-p) which...

1977-01-01T23:59:59.000Z

259

Vacuum-Deposited Planar Heterojunction Polymer Solar Cells  

Science Journals Connector (OSTI)

Vacuum-Deposited Planar Heterojunction Polymer Solar Cells ... Bilayer heterojunction solar cells were fabricated by sequential deposition of P3HT and C60 and the photovoltaic response measured. ... organic solar cells; conjugated polymers; poly(3-hexylthiophene); vacuum thermal deposition; thin films ...

Peter Kovacik; Giuseppe Sforazzini; Andrew G. Cook; Shawn M. Willis; Patrick S. Grant; Hazel E. Assender; Andrew A. R. Watt

2010-12-14T23:59:59.000Z

260

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 08 · Solar Cell Characterization 1Montana State University: Solar Cells Lecture 8: Characterization Solar Cell Operation n Emitter p Base Rear completing the circuit 2Montana State University: Solar Cells Lecture 8: Characterization Solar Cell

Kaiser, Todd J.

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Thermodynamic Limits of Solar Cell Efficiency  

Science Journals Connector (OSTI)

A general analysis of the coversion of solar heat to electrical energy in solar cells is presented. Some solar cell structures and processes are described which, in...

Würfel, Peter

262

Concentrator Solar Cell Modules and Systems Developed in Japan  

Science Journals Connector (OSTI)

Dissemination of photovoltaic (PV) systems has advanced, and solar cell module production has also significantly increased in ... Japan organized by the New Energy and Industrial Technology Development Organizati...

2007-01-01T23:59:59.000Z

263

Solar Energy Materials & Solar Cells 91 (2007) 13881391 Bifacial configurations for CdTe solar cells  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 91 (2007) 1388­1391 Bifacial configurations for CdTe solar We present a different back contact for CdTe solar cell by the application of only a transparent that acts as a free-Cu stable back contact and at the same time allows to realize bifacial CdTe solar cells

Romeo, Alessandro

264

Bilevel contact solar cells  

SciTech Connect (OSTI)

This patent describes a solar cell. It comprises a body of semiconductor material having at least one P/N junction therein, the body including a front face having no electrodes thereon, and a bilevel elevation back face having at least one P-doped region at a first level interdigitated with at least one N-doped region at a second level, wherein the at least one P-doped region and the at least one N-doped region partially overlap to form at least one compensated region; and a positive electrode contacting the at lease one P-doped region and a negative electrode contacting the at least one N-doped region, both electrodes contacting the solar cell on the back face.

Sinton, R.A.

1991-10-01T23:59:59.000Z

265

Advances in solar cell technology  

Science Journals Connector (OSTI)

The advances in solar cell efficiency radiation tolerance and cost over the last decade are reviewed. Potential performance of thin?film solar cells in space are discussed and the cost and the historical trends in production capability of the photovoltaics industry considered with respect to the requirements of satellite solar power systems.

Geoffrey A. Landis; Sheila G. Bailey

1995-01-01T23:59:59.000Z

266

Superlattice cascade solar cell  

SciTech Connect (OSTI)

This paper reports progress toward realization of a new cascade solar cell structure whose chief advantages over other present concepts are: use of silicon for the substrate and low bandgap cell; avoidance of the necessity of lattice matching; and incorporation of a GaAs/GaP superlattice to enhance efficiency and provide a low-resistance connecting junction. Details of the design and operation of an OMCVD system for growing this structure are presented. Results of experiments to optimize layer thickness, compositional uniformity, and surface morphology are described.

Wanlass, M.W.; Blakeslee, A.E.

1982-09-01T23:59:59.000Z

267

Nanoscale Charge Transport in Excitonic Solar Cells  

SciTech Connect (OSTI)

Excitonic solar cells, including all-organic, hybrid organic-inorganic and dye-sensitized solar cells (DSSCs), offer strong potential for inexpensive and large-area solar energy conversion. Unlike traditional inorganic semiconductor solar cells, where all the charge generation and collection processes are well understood, these excitonic solar cells contain extremely disordered structures with complex interfaces which results in large variations in nanoscale electronic properties and has a strong influence on carrier generation, transport, dissociation and collection. Detailed understanding of these processes is important for fabrication of highly efficient solar cells. Efforts to improve efficiency are underway at a large number of research groups throughout the world focused on inorganic and organic semiconductors, photonics, photophysics, charge transport, nanoscience, ultrafast spectroscopy, photonics, semiconductor processing, device physics, device structures, interface structure etc. Rapid progress in this multidisciplinary area requires strong synergetic efforts among researchers from diverse backgrounds. Such effort can lead to novel methods for development of new materials with improved photon harvesting and interfacial treatments for improved carrier transport, process optimization to yield ordered nanoscale morphologies with well defined electronic structures.

Venkat Bommisetty, South Dakota State University

2011-06-23T23:59:59.000Z

268

Plastic Schottky-barrier solar cells  

DOE Patents [OSTI]

A photovoltaic cell structure is fabricated from an active medium including an undoped polyacetylene, organic semiconductor. When a film of such material is in rectifying contact with a metallic area electrode, a Schottky-barrier junction is obtained within the body of the cell structure. Also, a gold overlayer passivates a magnesium layer on the undoped polyacetylene film. With the proper selection and location of elements a photovoltaic cell structure and solar cell are obtained.

Waldrop, J.R.; Cohen, M.J.

1981-12-30T23:59:59.000Z

269

Argonne CNM Highlight: Improved Hybrid Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Improved Hybrid Solar Cells Improved Hybrid Solar Cells inorganic-organic hybrid photovoltaic (PV) cells imade of highly ordered titanium dioxide (TiO2) nanotube arrays filled with solid organic hole conductors such as conjugated polymers One approach for making inexpensive inorganic-organic hybrid photovoltaic (PV) cells is to fill highly ordered titanium dioxide (TiO2) nanotube arrays with solid organic hole conductors such as conjugated polymers. Center for Nanoscale Materials researchers and collaborative users from the University of Chicago present a new in situ ultraviolet (UV) polymerization method for growing polythiophene inside TiO2 nanotubes and compare this method to the conventional approach of infiltrating nanotubes with presynthesized polymer. A nanotubular TiO2 substrate is immersed in a 2,5-diiodothiophene (DIT)

270

Monolithic tandem solar cell  

DOE Patents [OSTI]

A single-crystal, monolithic, tandem, photovoltaic solar cell is described which includes (a) an InP substrate having upper and lower surfaces, (b) a first photoactive subcell on the upper surface of the InP substrate, (c) a second photoactive subcell on the first subcell; and (d) an optically transparent prismatic cover layer over the second subcell. The first photoactive subcell is GaInAsP of defined composition. The second subcell is InP. The two subcells are lattice matched. 9 figs.

Wanlass, M.W.

1994-06-21T23:59:59.000Z

271

Thermal Management of Solar Cells.  

E-Print Network [OSTI]

??The focus on solar cells as a source of photovoltaic energy is rapidly increasing nowadays. The amount of sun's energy entering earth surface in one… (more)

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

272

Heterojunction Silicon Microwire Solar Cells  

Science Journals Connector (OSTI)

Heterojunction Silicon Microwire Solar Cells ... § Center for Advanced Photovoltaic Devices and Systems, University of Waterloo, 200 University Ave W, Waterloo, Ontario N2L 3G1, Canada ...

Majid Gharghi; Ehsanollah Fathi; Boubacar Kante; Siva Sivoththaman; Xiang Zhang

2012-11-21T23:59:59.000Z

273

Design of Zinc Oxide Based Solid-State Excitonic Solar Cell with Improved Efficiency  

E-Print Network [OSTI]

Excitonic photovoltaic devices, including organic, hybrid organic/inorganic, and dye-sensitized solar cells, are attractive alternatives to conventional inorganic solar cells due to their potential for low cost and low temperature solution...

Lee, Tao Hua

2012-02-14T23:59:59.000Z

274

Energy level alignment in polymer organic solar cells at donor-acceptor planar junction formed by electrospray vacuum deposition  

SciTech Connect (OSTI)

Using ultraviolet photoelectron spectroscopy (UPS), we have measured the energy level offset at the planar interface between poly(3-hexylthiophene) (P3HT) and C{sub 61}-butyric acid methylester (PCBM). Gradual deposition of PCBM onto spin-coated P3HT in high vacuum was made possible by using electrospray vacuum deposition (EVD). The UPS measurement of EVD-prepared planar interface resulted in the energy level offset of 0.91?eV between P3HT HOMO and PCBM LUMO, which is considered as the upper limit of V{sub oc} of the organic photovoltaic cells.

Kim, Ji-Hoon; Hong, Jong-Am; Kwon, Dae-Gyeon; Seo, Jaewon; Park, Yongsup, E-mail: parky@khu.ac.kr [Department of Physics and Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea, Republic of)

2014-04-21T23:59:59.000Z

275

Oligo-and Polythiophene/ZnO Hybrid Nanowire Solar Cells  

E-Print Network [OSTI]

of an organic/inorganic hybrid single nanowire solar cell. End-functionalized oligo- and polythiophenes were the morphology at the organic/inorganic interface. Individual nanowire solar cell devices exhibited well generation solar cells, then there must be an improved fundamental understanding of the organic

Yang, Peidong

276

Optical and carrier transport properties of graphene oxide based crystalline-Si/organic Schottky junction solar cells  

SciTech Connect (OSTI)

We investigated the graphene oxide (GO) based n-type crystalline silicon (c-Si)/conductive poly(ethylene dioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) Schottky junction devices with optical characterization and carrier transport measurement techniques. The optical transmittance in the UV region decreased markedly for the films with increasing the concentration of GO whereas it increased markedly in the visible-infrared regions. Spectroscopic ellipsometry revealed that the ordinary and extraordinary index of refraction increased with increasing the concentration of GO. The hole mobility also increased from 1.14 for pristine film to 1.85 cm{sup 2}/V s for the 12–15?wt. % GO modified film with no significant increases of carrier concentration. The highest conductivity was found for a 15?wt. % GO modified PEDOT:PSS film: the c-Si/PEDOT:PSS:GO device using this sample exhibited a relatively high power conversion efficiency of 11.04%. In addition, the insertion of a 2–3?nm-thick GO thin layer at the c-Si/PEDOT:PSS interface suppressed the carrier recombination efficiency of dark electron and photo-generated hole at the anode, resulting in the increased photovoltaic performance. This study indicates that the GO can be good candidates for hole transporting layer of c-Si/PEDOT:PSS Schottky junction solar cell.

Khatri, I.; Tang, Z.; Hiate, T.; Liu, Q.; Ishikawa, R.; Ueno, K.; Shirai, H. [Graduate School of Science and Engineering, Saitama University, Saitama 338-8570 (Japan)

2013-12-21T23:59:59.000Z

277

Solar Energy Materials & Solar Cells 90 (2006) 664677 Invited article  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 90 (2006) 664­677 Invited article Recent developments in evaporated CdTe solar cells G. Khrypunova , A. Romeob , F. Kurdesauc , D.L. Ba¨ tznerd , H. Zogge , A Abstract Recent developments in the technology of high vacuum evaporated CdTe solar cells are reviewed

Romeo, Alessandro

278

A Sunny Outlook for Solar Cells  

Science Journals Connector (OSTI)

A Sunny Outlook for Solar Cells ... Photovoltaic solar cells, which convert sunlight into electricity, are appealing from a variety of viewpoints. ...

BILL N. BARON

1987-01-19T23:59:59.000Z

279

ELECTROSPUN POLYMER-FIBER SOLAR CELL.  

E-Print Network [OSTI]

??A study of fabricating the first electrospun polymer-fiber solar cell with MEHPPV is presented. Motivation for the work and a brief history of solar cell… (more)

Nagata, Shinobu

2011-01-01T23:59:59.000Z

280

Hybrid Silicon Nanocone–Polymer Solar Cells  

Science Journals Connector (OSTI)

Hybrid Silicon Nanocone–Polymer Solar Cells ... In this study, we demonstrate a hybrid solar cell composed of Si nanocones and conductive polymer. ...

Sangmoo Jeong; Erik C. Garnett; Shuang Wang; Zongfu Yu; Shanhui Fan; Mark L. Brongersma; Michael D. McGehee; Yi Cui

2012-04-30T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Biomimetic Dye Molecules for Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

such as those used in solar cells. This requires close monitoring to obtain reproducible solar cells. The polarization dependence of the spectra reveals the orientation of the...

282

Low-Cost Photovoltaics: Luminescent Solar Concentrators And Colloidal Quantum Dot Solar Cells  

E-Print Network [OSTI]

vacuum technology that is required in crystalline solar cellTechnologies, Inc. “SolarWindow” Quantum Dot Solar Cells

Leow, Shin Woei

2014-01-01T23:59:59.000Z

283

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network [OSTI]

photovoltaic (PV) solar cell technology. It is defined asWEIGHT SOLAR CELLS Current solar array technologies provide

Shao, Qinghui

2009-01-01T23:59:59.000Z

284

Module level solutions to solar cell polarization  

DOE Patents [OSTI]

A solar cell module includes interconnected solar cells, a transparent cover over the front sides of the solar cells, and a backsheet on the backsides of the solar cells. The solar cell module includes an electrical insulator between the transparent cover and the front sides of the solar cells. An encapsulant protectively packages the solar cells. To prevent polarization, the insulator has resistance suitable to prevent charge from leaking from the front sides of the solar cells to other portions of the solar cell module by way of the transparent cover. The insulator may be attached (e.g., by coating) directly on an underside of the transparent cover or be a separate layer formed between layers of the encapsulant. The solar cells may be back junction solar cells.

Xavier, Grace (Fremont, CA), Li; Bo (San Jose, CA)

2012-05-29T23:59:59.000Z

285

Multiexciton Solar Cells of CuInSe2 Nanocrystals  

Science Journals Connector (OSTI)

Multiexciton Solar Cells of CuInSe2 Nanocrystals ... nanocrystals; photovoltaics; CIGS; multiple excitons; solar cells; photonic curing ... (4-8) Extraction of more than one electron per absorbed photon as electrical current in devices has also been reported,(9-12) with a few instances of device quantum efficiencies (QEs) exceeding 100%, PbS (internal QE only),(13) PbSe (external QE, EQE)(14) nanocrystal solar cells, and an organic device exhibiting a related process of singlet fission. ...

C. Jackson Stolle; Taylor B. Harvey; Douglas R. Pernik; Jarett I. Hibbert; Jiang Du; Dong Joon Rhee; Vahid A. Akhavan; Richard D. Schaller; Brian A. Korgel

2013-12-26T23:59:59.000Z

286

Structure-Function Relationships in Semiconducting Polymers for Organic Photovoltaics  

E-Print Network [OSTI]

mechanism by which organic solar cells operate, and then tomechanism of an organic solar cell. (1) Absorption ofthe improvement of organic solar cells. The photophysics of

Kavulak, David Fredric Joel

2010-01-01T23:59:59.000Z

287

Conjugated Polymer Design and Engineering for Organic Electronics  

E-Print Network [OSTI]

conversion efficiencies in organic solar cells is reported.operation of an organic solar cell and the correspondingcarrier mobility for organic solar cells for minimizing

Woo, Claire Hoi Kar

2011-01-01T23:59:59.000Z

288

Cost-effective ITO-free organic solar cells with silver nanowire–PEDOT:PSS composite electrodes via a one-step spray deposition method  

Science Journals Connector (OSTI)

Abstract We demonstrate cost-effective, indium tin oxide (ITO)-free organic solar cells (OSCs) fabricated with a silver nanowire (AgNW)–poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite electrode. The composite films were prepared with a one-step spray-coating of a mixture composed of AgNW and a highly conductive, dimethylsulfoxide (DMSO)-treated PEDOT:PSS (hcPEDOT). The film-thickness, optical transmittance, and sheet resistance of AgNW–hcPEDOT hybrid electrodes were easily controlled by varying the spray deposition time. With AgNW–hcPEDOT composite electrodes, the devices exhibited high power conversion efficiencies of up to 2.16% under 100 mW cm?2 and AM 1.5G illumination conditions. In addition, the surface of the AgNW–hcPEDOT composite electrodes was further smoothened with an additional spray-coated PEDOT:PSS buffer layer, leading to reduced shorting and improved cell-efficiency. As a result, the best performing devices with a AgNW–hcPEDOT electrode and spray-coated PEDOT buffer exhibited efficiencies of up to 2.65%, which approaches that of conventional ITO-based devices. These results indicate that the one-step spray-coated AgNW–hcPEDOT composite-based film is a viable alternative to the high-cost and vacuum-deposited ITO for mass-production and low-cost roll-to-roll based solar cells.

Yong-Jin Noh; Seok-Soon Kim; Tae-Wook Kim; Seok-In Na

2014-01-01T23:59:59.000Z

289

Definition: Solar cell | Open Energy Information  

Open Energy Info (EERE)

Solar cell Solar cell (Redirected from Definition:PV cell) Jump to: navigation, search Dictionary.png Solar cell Converts light into electrical energy. Traditional solar cells are made from silicon; second-generation solar cells (thin-film solar cells) are made from amorphous silicon or nonsilicon materials such as cadmium telluride; and third-generation solar cells are being made from variety of new materials, including solar inks, solar dyes, and conductive plastics.[1][2] View on Wikipedia Wikipedia Definition A solar cell (also called a photovoltaic cell) is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect. It is a form of photoelectric cell (in that its electrical characteristics-e.g. current, voltage, or resistance-vary

290

Organic solvent based TiO2 dispersion paste for dye-sensitized solar cells prepared by industrial production level procedure  

Science Journals Connector (OSTI)

In order to prepare the TiO2...liquid dispersions for the electrodes of dye-sensitized solar cells with industrial mass production level at a reasonable cost, the present...2 liquid dispersions by a general indus...

Ryohei Mori; Tsutomu Ueta; Kazuo Sakai; Yasuhiro Niida…

2011-03-01T23:59:59.000Z

291

Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

Ever since the invention of the silicon solar cell in the 1940s, people have acknowledged the ... potential of photovoltaic systems for large scale electricity production. However, semiconductor grade silicon waf...

Jan Kroon; Andreas Hinsch

2003-01-01T23:59:59.000Z

292

Dye-Sensitized Solar Cells  

Broader source: Energy.gov [DOE]

DOE supports research and development projects aimed at increasing the efficiency and lifetime of dye-sensitized solar cells (DSSCs). Below are a list of current projects, summary of the benefits,...

293

Solar Cells Using Quantum Funnels  

Science Journals Connector (OSTI)

Solar Cells Using Quantum Funnels ... Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada ...

Illan J. Kramer; Larissa Levina; Ratan Debnath; David Zhitomirsky; Edward H. Sargent

2011-08-09T23:59:59.000Z

294

Solar cell with back side contacts  

DOE Patents [OSTI]

A III-V solar cell is described herein that includes all back side contacts. Additionally, the positive and negative electrical contacts contact compoud semiconductor layers of the solar cell other than the absorbing layer of the solar cell. That is, the positive and negative electrical contacts contact passivating layers of the solar cell.

Nielson, Gregory N; Okandan, Murat; Cruz-Campa, Jose Luis; Resnick, Paul J; Wanlass, Mark Woodbury; Clews, Peggy J

2013-12-24T23:59:59.000Z

295

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 10 · Summary 1Montana State University: Solar Cells Lecture 10: Summary Summer 2010 Class Montana State University: Solar Cells Lecture 10: Summary 2 Solar Cell Operation n Emitter p Base Rear Contact Antireflection coating Absorption of photon

Kaiser, Todd J.

296

Silicon solar cells: state of the art  

Science Journals Connector (OSTI)

...Roberto Amendolia and Can Li Silicon solar cells: state of the art Martin A. Green...majority of photovoltaic (PV) solar cells produced to date have been based...this point are also explored. solar cells|silicon solar cells|silicon...

2013-01-01T23:59:59.000Z

297

Hierarchically structured photoelectrodes for dye-sensitized solar cells  

E-Print Network [OSTI]

-sensitized solar cells (DSCs) and organic/ inorganic hybrid solar cells. Guozhong Cao Guozhong Cao, Ph, and authored and edited 5 books, including ``Nanostructures and Nanomaterials''. His current research-ion batteries, supercapacitors, and hydrogen storage materials. This journal is ª The Royal Society of Chemistry

Cao, Guozhong

298

Exciton splitting and carrier transport across the amorphous-silicon/ polymer solar cell interface  

E-Print Network [OSTI]

of bilayer hybrid solar cells to better understand the physics controlling organic-inorganic device of Physics. DOI: 10.1063/1.2408641 Hybrid organic-inorganic solar cells combine the pro- cessabilityExciton splitting and carrier transport across the amorphous-silicon/ polymer solar cell interface

McGehee, Michael

299

Photoinduced Giant Dielectric Constant in Lead Halide Perovskite Solar Cells  

Science Journals Connector (OSTI)

Perovskite solar cells have emerged as a major topic of research in photovoltaics because of the promising properties of the solution processed, low cost, and high efficiency solar cells for large-scale solar energy production. ... Illumination of the perovskite samples produces a significant increase of charge carrier density in the perovskite layer due to the high extinction coefficient of organic–inorganic lead halide perovskite. ... The effect of electron- and hole-selective contacts in the final cell performance of hybrid lead halide perovskite, CH3NH3PbI3, solar cells has been systematically analyzed by impedance spectroscopy. ...

Emilio J. Juarez-Perez; Rafael S. Sanchez; Laura Badia; Germá Garcia-Belmonte; Yong Soo Kang; Ivan Mora-Sero; Juan Bisquert

2014-06-23T23:59:59.000Z

300

Testing of the Sunstove Organization`s Sunstove Solar Oven  

SciTech Connect (OSTI)

A Sunstove Organization`s Sunstove was tested at Sandia`s Solar Thermal Test Facility. It was instrumented with five type K thermocouples to determine warm-up rates when empty and when a pot containing two liters of water was placed inside. It reached inside air temperatures above 115{degrees}C (240{degrees}F). It heated two liters of water from room temperature to 80{degrees}C (175{degrees}F) in about two hours. Observations were made on the cooling and reheating rates during a cloud passage. The adverse effects of wind on the operation of the solar oven were also noted.

Moss, T.A.

1997-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Polymer solar cells  

Science Journals Connector (OSTI)

...become free carriers that can provide...extraction of carriers before recombination...and acceptor energy levels to extend...certified power conversion efficiency...efficiency carrier multiplication...implications for solar energy conversion. Phys. Rev...

2013-01-01T23:59:59.000Z

302

TOPCAT Solar Cell Alignment & Energy Concentration Technology...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Thermal Solar Thermal Find More Like This Return to Search TOPCAT Solar Cell Alignment & Energy Concentration Technology Sandia National Laboratories Contact SNL About This...

303

New functional polymers for sensors, smart materials and solar cells  

E-Print Network [OSTI]

Organic polymers can be used as the active component of sensors, smart materials, chemical-delivery systems and the active layer of solar cells. The rational design and modification of the chemical structure of polymers ...

Lobez Comeras, Jose Miguel

2012-01-01T23:59:59.000Z

304

The renaissance of hybrid solar cells: progresses, challenges, and perspectives  

E-Print Network [OSTI]

understanding of optoelectronic interactions in organic–inorganic hybrid systems. In this article, we review the state-of-the-art progress in hybrid bulk heterojunction solar cells, covering new materials design, interfacial interaction, and processing control...

Feng, Gao; Ren, Shenqiang; Jianpu, Wang

2013-06-12T23:59:59.000Z

305

Solar-Hydrogen Fuel-Cell Vehicles  

E-Print Network [OSTI]

M. A. (1992). Hydrogen Fuel-Cell Vehicles. Re- koebensteinthan both. Solar-hydrogen and fuel-cell vehicles wouldberegulation. Solar-Hydrogen Fuel-Cell Vehicles MarkA. DeLuchi

DeLuchi, Mark A.; Ogden, Joan M.

1993-01-01T23:59:59.000Z

306

Examining the effect of additives and thicknesses of hole transport layer for efficient organic solar cell devices  

Science Journals Connector (OSTI)

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), a conducting polymer, has been receiving a great deal of attention for next generation optoelectronic organic devices. In this report, we discu...

Shizuyasu Ochiai; Palanisamy Kumar; Kannappan Santhakumar…

2013-07-01T23:59:59.000Z

307

Anomalous Hysteresis in Perovskite Solar Cells  

Science Journals Connector (OSTI)

Anomalous Hysteresis in Perovskite Solar Cells ... Even for silicon solar cells, hysteresis in the current-voltage curves can occur if the bias is swept extremely fast, with complete scans performed in less than 2 to 44 ms depending on the precise cell architecture. ... We will discuss the three predominant perovskite solar-cell architectures in this letter: (i) planar heterojunction solar cells with no mesoporous oxide,(7, 17) (ii) perovskite-sensitized solar cells fabricated on mesoporous TiO2,(1, 3) and (iii) meso-superstrutured solar cells (MSSCs) which employ mesoporous Al2O3 as an inert scaffold in place of the TiO2. ...

Henry J. Snaith; Antonio Abate; James M. Ball; Giles E. Eperon; Tomas Leijtens; Nakita K. Noel; Samuel D. Stranks; Jacob Tse-Wei Wang; Konrad Wojciechowski; Wei Zhang

2014-03-24T23:59:59.000Z

308

Solar Energy Materials & Solar Cells 78 (2003) 567595 Low-mobility solar cells: a device physics primer  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 78 (2003) 567­595 Low-mobility solar cells: a device physics, Syracuse, New York 13244-1130, USA Abstract The properties of pin solar cells based on photogeneration for the solar conversion efficiency of amorphous silicon-based cells that are limited by valence bandtail

Schiff, Eric A.

309

Modeling and Optimization of Polymer based Bulk Heterojunction (BH) Solar cell * Biswajit Ray, Pradeep R. Nair, R. Edwin Garca1  

E-Print Network [OSTI]

of the morphology can double the efficiency of BH cells. 1. Introduction Polymer based organic solar cell remains/devices of organic cells to achievable efficiency. The cartoon of a BH solar cell in Fig. 1a illustrates four keyModeling and Optimization of Polymer based Bulk Heterojunction (BH) Solar cell * Biswajit Ray

Alam, Muhammad A.

310

California: TetraCell Silicon Solar Cell Improves Efficiency...  

Energy Savers [EERE]

California: TetraCell Silicon Solar Cell Improves Efficiency, Wins R&D 100 Award California: TetraCell Silicon Solar Cell Improves Efficiency, Wins R&D 100 Award August 16, 2013 -...

311

Plastic Solar Cells See Bright Future | ANSER Center | Argonne...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Plastic Solar Cells See Bright Future Home > News & Events > Plastic Solar Cells See Bright Future Plastic Solar Cells See Bright Future Evanston, Ill---Energy consumption is...

312

Highly Mismatched Alloys for Intermediate Band Solar Cells  

E-Print Network [OSTI]

single-junction intermediate band solar cells. Figure 5:conversion efficiency for a solar cell fabricated from a Znfor Intermediate Band Solar Cells W. Walukiewicz 1 , K. M.

2005-01-01T23:59:59.000Z

313

Definition: Solar cell | Open Energy Information  

Open Energy Info (EERE)

cell cell Jump to: navigation, search Dictionary.png Solar cell Converts light into electrical energy. Traditional solar cells are made from silicon; second-generation solar cells (thin-film solar cells) are made from amorphous silicon or nonsilicon materials such as cadmium telluride; and third-generation solar cells are being made from variety of new materials, including solar inks, solar dyes, and conductive plastics.[1][2] View on Wikipedia Wikipedia Definition A solar cell (also called a photovoltaic cell) is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect. It is a form of photoelectric cell (in that its electrical characteristics-e.g. current, voltage, or resistance-vary when light is incident upon it) which, when exposed to light, can generate

314

Development of concentrator solar cells  

SciTech Connect (OSTI)

A limited pilot production run on PESC silicon solar cells for use at high concentrations (200 to 400 suns) is summarized. The front contact design of the cells was modified for operation without prismatic covers. The original objective of the contract was to systematically complete a process consolidation phase, in which all the, process improvements developed during the contract would be combined in a pilot production run. This pilot run was going to provide, a basis for estimating cell costs when produced at high throughput. Because of DOE funding limitations, the Photovoltaic Concentrator Initiative is on hold, and Applied Solar`s contract was operated at a low level of effort for most of 1993. The results obtained from the reduced scope pilot run showed the effects of discontinuous process optimization and characterization. However, the run provided valuable insight into the technical areas that can be optimized to achieve the original goals of the contract.

Not Available

1994-08-01T23:59:59.000Z

315

Comparative study on triphenylamine-based bi-armed and four-armed small molecule donors for solution processed organic solar cells  

Science Journals Connector (OSTI)

Abstract A novel four-armed triphenylamine (TPA)-based molecule named (TPATh)4TPA2B with 4,7-bis(4-diphenylaminophenyl)-2,1,3-benzothiadiazole unit as the central building block and triphenylamine-3-dodecylthiophene unit as the arms and a bi-armed TPA-based molecule named (TPATh)2(MTPA)2B with the same central building block and arms as those of (TPATh)4TPA2B were designed and synthesized by Pd-catalyzed Stille reaction. The thermal stability, photophysical and electrochemical properties of these small molecules are studied. Moreover, they are evaluated in solution processed bulk-heterojunction organic solar cells (OSCs). The device performances of the \\{OSCs\\} based on these small molecule donors and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) were studied. With the same core, the four-armed molecule has the higher absorption and better miscibility with PC71BM than that of bi-armed molecule, while the bi-armed molecule (TPATh)2(MTPA)2B has the higher hole mobility. The power conversion efficiency of the \\{OSCs\\} based on (TPATh)4TPA2B as donor and PC71BM as acceptor is 1.3% with open-circuit voltage 0.71 V.

Hongyu Zhen; Zuosheng Peng; Lintao Hou; Tao Jia; Qi Li; Qiong Hou

2015-01-01T23:59:59.000Z

316

Evaluation of internal potential distribution and carrier extraction properties of organic solar cells through Kelvin probe and time-of-flight measurements  

SciTech Connect (OSTI)

The carrier extraction property of a prototypical small molecule organic solar cell (OSC) composed of copper phthalocyanine (CuPc), C{sub 60}, and bathocuproine (BCP) was studied on the basis of the internal potential distribution and carrier dynamics in the device. The internal potential distribution in the OSC structure at the interfaces and in the bulk region was determined by the Kelvin probe method. Significant potential gradients were found in the CuPc film on indium tin oxide and in the C{sub 60} film on CuPc, consistent with charge transfer through the contacts. Moreover, surface potential of the BCP layer grew linearly with increasing film thickness with a slope of ca. 35?mV/nm (giant surface potential: GSP), which indicated spontaneous orientation polarization in the film. The potential gradient and GSP significantly changed the built-in potential of the device. Current–voltage and modified time-of-flight measurements revealed that the BCP layer worked as an electron injection and extraction layer despite the wide energy gap. These results were discussed based on the contributions of GSP and the gap states in the BCP layer.

Tanaka, Yuya; Oda, Keisuke; Nakayama, Yasuo [Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522 (Japan); Noguchi, Yutaka, E-mail: noguchi@meiji.ac.jp; Ishii, Hisao, E-mail: ishii130@faculty.chiba-u.jp [Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522 (Japan); Center for Frontier Science, Chiba University, Chiba 263-8522 (Japan); Takahashi, Jun-ichi; Tokairin, Hiroshi [Advanced Technology Research Laboratories, Idemitsu Kosan Co., Ltd. Sodegaura 299-0293 (Japan)

2014-09-21T23:59:59.000Z

317

Photon Management in Thin Film Solar Cells  

Science Journals Connector (OSTI)

We analyze the absorption enhancement in single and tandem solar-cells comprising nanostructures that increase the path of the photons inside the solar cell. For this purpose we...

Rockstuhl, Carsten; Fahr, Stephan; Paul, Thomas; Menzel, Christoph; Bittkau, Karsten; Beckers, Thomas; Carius, Reinhard; Lederer, Falk

318

A Solid Solar-Cell Solution  

Science Journals Connector (OSTI)

A Solid Solar-Cell Solution ... Some three-quarters of electricity-producing rooftop photovoltaic panels and other types of solar arrays are based on crystalline silicon cells, a well-established but expensive technology. ...

MITCH JACOBY

2012-06-11T23:59:59.000Z

319

Sputtered Nickel Oxide Thin Film for Efficient Hole Transport Layer in Polymer-Fullerene Bulk-Heterojunction Organic Solar Cell  

SciTech Connect (OSTI)

Bulk-heterojunction (BHJ) organic photovoltaics (OPV) are very promising thin film renewable energy conversion technologies due to low production cost by high-throughput roll-to-roll manufacturing, an expansive list of compatible materials, and flexible device fabrication. An important aspect of OPV device efficiency is good contact engineering. The use of oxide thin films for this application offers increased design flexibility and improved chemical stability. Here we present our investigation of radio frequency magnetron sputtered nickel oxide (NiO{sub x}) deposited from oxide targets as an efficient, easily scalable hole transport layer (HTL) with variable work-function, ranging from 4.8 to 5.8 eV. Differences in HTL work-function were not found to result in statistically significant changes in open circuit voltage (V{sub oc}) for poly(3-hexylthiophene):[6,6]-phenyl-C{sub 61}-butyric acid methyl ester (P3HT:PCBM) BHJ device. Ultraviolet photoemission spectroscopy (UPS) characterization of the NiO{sub x} film and its interface with the polymer shows Fermi level alignment of the polymer with the NiO{sub x} film. UPS of the blend also demonstrates Fermi level alignment of the organic active layer with the HTL, consistent with the lack of correlation between V{sub oc} and HTL work-function. Instead, trends in j{sub sc}, V{sub oc}, and thus overall device performance are related to the surface treatment of the HTL prior to active layer deposition through changes in active layer thickness.

Widjonarko, N. E.; Ratcliff, E. L.; Perkins, C. L.; Sigdel, A. K.; Zakutayev, A.; Ndione, P. F.; Gillaspie, D. T.; Ginley, D. S.; Olson, D. C.; Berry, J. J.

2012-03-01T23:59:59.000Z

320

20% efficiency silicon solar cells  

Science Journals Connector (OSTI)

Further improvements in crystalline silicon solar cell performance have been obtained by combining the high levels of surface recombination control demonstrated in earlier passivated emitter solar cells with an improved optical approach. This approach involves the use of microgrooved surfaces which retain the advantages of pyramidally textured surfaces while avoiding some disadvantages of the latter. The approach results in a 5–6% improvement in cell short?circuit current density for cells fabricated on 0.1 and 0.2 ??cm (?p type) substrates. This results in an energy conversion efficiency for these devices above 20% under standard terrestrial test conditions (AM1.5 100 mW/cm2) for the first time.

A. W. Blakers; M. A. Green

1986-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Enhancing the Performance of Solution-Processed Bulk-Heterojunction Solar Cells Using Hydrogen-Bonding-Induced Self-Organization of Small Molecules  

Science Journals Connector (OSTI)

Small-molecule solar-cell performance is highly sensitive to the crystallinity and intermolecular connectivity of the molecules. In order to enhance the crystallinity for the solution-processed small molecule, it is possible to make use of carboxylic acid ...

Kwan Hang Lam; Thelese Ru Bao Foong; Zi En Ooi; Jie Zhang; Andrew Clive Grimsdale; Yeng Ming Lam

2013-11-11T23:59:59.000Z

322

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 05 · P-N Junction 1Montana State University: Solar Cells Lecture 5: P-N Junction P-N Junction · Solar Cell is a large area P-N junction electron (hole) positive) 2Montana State University: Solar Cells Lecture 5: P-N Junction p-n Junction p n P

Kaiser, Todd J.

323

Key Physical Mechanisms in Nanostructured Solar Cells  

SciTech Connect (OSTI)

The objective of the project was to study both theoretically and experimentally the excitation, recombination and transport properties required for nanostructured solar cells to deliver energy conversion efficiencies well in excess of conventional limits. These objectives were met by concentrating on three key areas, namely, investigation of physical mechanisms present in nanostructured solar cells, characterization of loss mechanisms in nanostructured solar cells and determining the properties required of nanostructured solar cells in order to achieve high efficiency and the design implications.

Dr Stephan Bremner

2010-07-21T23:59:59.000Z

324

First Principles Study of Photo-oxidation Degradation Mechanisms in P3HT for Organic Solar Cells  

E-Print Network [OSTI]

We present a theoretical study of degradation mechanisms for photoinduced oxidation in organic polymers in the condensed phase, using poly(3-hexylthiophene)(P3HT) as an example. Applying density functional theory with a hybrid density functional and periodic boundary conditions that account for steric effects and permit the modeling of interchain chemical reactions, we investigate reaction pathways that may lead to the oxidation of thiophene backbone as a critical step toward disrupting the polymer conjugation. We calculate energy barriers for reactions of the P3HT backbone with oxidizing agents including hydroxyl radical (OH$\\cdot$), hydroperoxide (ROOH), and peroxyl radical (ROO$\\cdot$), following a UV-driven radical reaction starting at the $\\alpha$-carbon of the alkyl side chain as suggested by infrared (IR) and X-ray photoemission (XPS) spectrosocopy studies. The results strongly suggest that an attack of OH$\\cdot$ on sulfur in P3HT is unlikely to be thermodynamically favored. On the other hand, an attack of a peroxyl radical on the side chain on the P3HT backbone may provide low barrier reaction pathways to photodegradation of P3HT and other polymers with side chains. The condensed phase setting is found to qualitatively affect predictions of degradation processes.

Na Sai; Kevin Leung; Judit Zádor; Graeme Henkelman

2014-03-19T23:59:59.000Z

325

Electrochemical Investigation of a Microbial Solar Cell Reveals a Nonphotosynthetic Biocathode Catalyst  

Science Journals Connector (OSTI)

...are microbial fuel cells (MFCs) that generate...electrosynthesis of organic carbon from carbon...hypothesized that microbial solar cells (MSCs) can continuously...g., oxygen and organic carbon) can be utilized...improved current production (2). Since then...

Sarah M. Strycharz-Glaven; Richard H. Glaven; Zheng Wang; Jing Zhou; Gary J. Vora; Leonard M. Tender

2013-04-19T23:59:59.000Z

326

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 02 Microfabrication ­ A combination · Photolithograpy · Depostion · Etching 1 Montana State University: Solar Cells Lecture 2: Microfabrication Flow Montana State University: Solar Cells Lecture 2: Microfabrication Questions · What is heat? · Heat

Kaiser, Todd J.

327

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 09 · Photovoltaic Systems 1Montana State University: Solar Cells Lecture 9: PV Systems Several types of operating modes · Centralized power plant or wanted Montana State University: Solar Cells Lecture 9: PV Systems 2 Residential Side Mounted Montana

Kaiser, Todd J.

328

Monolayer MoS2 Heterojunction Solar Cells  

Science Journals Connector (OSTI)

Monolayer MoS2 Heterojunction Solar Cells ... molybdenum disulfide; heterojunction solar cell; 2D material; monolayer; chemical vapor deposition ...

Meng-Lin Tsai; Sheng-Han Su; Jan-Kai Chang; Dung-Sheng Tsai; Chang-Hsiao Chen; Chih-I Wu; Lain-Jong Li; Lih-Juann Chen; Jr-Hau He

2014-07-21T23:59:59.000Z

329

Light trapping design for low band-gap polymer solar cells  

E-Print Network [OSTI]

Light trapping design for low band-gap polymer solar cells Stephen Foster1,* and Sajeev John1,2 1 demonstrate numerically a 2-D nanostructured design for light trapping in a low band-gap polymer solar cell, "Light harvesting improvement of organic solar cells with self- enhanced active layer designs," Opt

John, Sajeev

330

Ames Lab 101: Improving Solar Cell Efficiency  

ScienceCinema (OSTI)

Rana Biswas, a scientist with the Ames Laboratory, discusses his team's research in creating more efficient solar cells and working with Iowa Thin Film to produce these cells.

Biswas, Rana

2012-08-29T23:59:59.000Z

331

Ames Lab 101: Improving Solar Cell Efficiency  

SciTech Connect (OSTI)

Rana Biswas, a scientist with the Ames Laboratory, discusses his team's research in creating more efficient solar cells and working with Iowa Thin Film to produce these cells.

Biswas, Rana

2011-01-01T23:59:59.000Z

332

Toward Improved Hybrid Solar Cells (IN-07-053) - Energy Innovation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

energy currently sees only limited use. Hybrid solar cells-devices incorporating both organic and inorganic materials-may serve as a promising alternative for traditional...

333

Solar cells Improved Hybrid Solar Cells via in situ UV Polymerization  

E-Print Network [OSTI]

Solar cells Improved Hybrid Solar Cells via in situ UV Polymerization Sanja Tepavcevic, Seth B-enhanced solar energy conversion. By using this simple in situ UV polymerization method that couples mobility of the photoactive layer can be enhanced. 1. Introduction Hybrid solar cells have been developed

Sibener, Steven

334

Plastic Schottky barrier solar cells  

DOE Patents [OSTI]

A photovoltaic cell structure is fabricated from an active medium including an undoped, intrinsically p-type organic semiconductor comprising polyacetylene. When a film of such material is in rectifying contact with a magnesium electrode, a Schottky-barrier junction is obtained within the body of the cell structure. Also, a gold overlayer passivates the magnesium layer on the undoped polyacetylene film.

Waldrop, James R. (Thousand Oaks, CA); Cohen, Marshall J. (Thousand Oaks, CA)

1984-01-24T23:59:59.000Z

335

An Introduction to Solar Cells  

Science Journals Connector (OSTI)

Most likely solar cells will play a significant role in this country's strategy to address the two interrelated issues of global warming and dependence on imported oil. The purpose of this paper is to present an explanation of how solar cells work at an introductory high school college or university physics course level. The treatment presented here will be qualitative and somewhat simplified in order to reach the desired audience; references are provided for a more detailed and mathematically sophisticated treatment. It is hoped that this paper will in a small way motivate students to learn more about this technology so critical to the energy and environmental future of this country.

Bernard J. Feldman

2010-01-01T23:59:59.000Z

336

Neutral Color Semitransparent Microstructured Perovskite Solar Cells  

Science Journals Connector (OSTI)

perovskite; solar cell; semitransparent; photovoltaics; building-integrated photovoltaics; neutral color; microstructured ... Building-integrated photovoltaics (BIPV) are an attractive concept for economic generation of solar power. ... This work now enables perovskite solar cells to not only compete for high-efficiency opaque applications but also offer an ideal solution to building integrated photovoltaics: neutral-color semitransparency at comparatively high efficiency. ...

Giles E. Eperon; Victor M. Burlakov; Alain Goriely; Henry J. Snaith

2013-12-10T23:59:59.000Z

337

Method to analyze the ability of bulk heterojunctions of organic and hybrid solar cells to dissociate photogenerated excitons and collect free carriers  

SciTech Connect (OSTI)

We have developed a model to predict and analyze the photocurrent generation and resulting charge carrier Dissociation and Collection Efficiency (DCE) through reflectivity and quantum efficiency spectra. The DCE is regarded as a function of the morphology and exciton transport properties of the bulk heterojunction and is therefore a way to investigate the final properties of photoactive layer in a solar cell. Method proposed allows determination of the efficiency at which photogenerated excitons are dissociated in a working device with respect to the position in the cell at which the generation occurs. The method is tested on our results as well as on a number of results already present in the literature.

Basta, M.; Dusza, M.; Palewicz, M.; Nawrot, U.; Granek, F., E-mail: filip.granek@eitplus.pl [Wroclaw Research Centre EIT, Stablowicka 147, 54-066 Wroclaw (Poland)

2014-05-07T23:59:59.000Z

338

Three-junction solar cell  

DOE Patents [OSTI]

A photovoltaic solar cell is formed in a monolithic semiconductor. The cell contains three junctions. In sequence from the light-entering face, the junctions have a high, a medium, and a low energy gap. The lower junctions are connected in series by one or more metallic members connecting the top of the lower junction through apertures to the bottom of the middle junction. The upper junction is connected in voltage opposition to the lower and middle junctions by second metallic electrodes deposited in holes 60 through the upper junction. The second electrodes are connected to an external terminal.

Ludowise, Michael J. (Cupertino, CA)

1986-01-01T23:59:59.000Z

339

MODEL AND OPTIMIZATION OF ORGANIC PHOTOVOLTAIC CELLS Amelia McNamara  

E-Print Network [OSTI]

advantages. In contrast to the typical silicon-based solar cells, organic cells can be formed from extremely the organic photovoltaic cell, an important topic in the energy industry which has not been well studied. We are especially interested in the optimization of the two active layers in the solar cell, the PEOPT polymer

340

Dye Regeneration Kinetics in Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

Nevertheless, the calculated diffusion limit provides a useful estimate of the maximum attainable regeneration rate. ... Design of Organic Dyes and Cobalt Polypyridine Redox Mediators for High-Efficiency Dye-Sensitized Solar Cells ... cells are discussed, considering the high photovoltaic efficiencies obtained for devices employing Ru bipyridyl sensitizer dyes in combination with iodide/tri-iodide based redox electrolytes. ...

Torben Daeneke; Attila J. Mozer; Yu Uemura; Satoshi Makuta; Monika Fekete; Yasuhiro Tachibana; Nagatoshi Koumura; Udo Bach; Leone Spiccia

2012-09-27T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Detailed balance theory of excitonic and bulk heterojunction solar cells  

Science Journals Connector (OSTI)

A generalized solar cell model for excitonic and classical bipolar solar cells describes the combined transport and interaction of electrons, holes, and excitons in accordance with the principle of detailed balance. Conventional inorganic solar cells, single-phase organic solar cells and bulk heterojunction solar cells, i.e., nanoscale mixtures of two organic materials, are special cases of this model. For high mobilities, the compatibility with the principle of detailed balance ensures that our model reproduces the Shockley-Queisser limit irrespective of how the energy transport is achieved. For less ideal devices distinct differences become visible between devices that are described by linear differential equations and those with nonlinear effects, such as a voltage-dependent collection in bipolar p-i-n-type devices. These differences in current-voltage characteristics are also decisive for the validity of the reciprocity theorem between photovoltaic quantum efficiency and electroluminescent emission. Finally, we discuss the effect of band offset at the heterointerface in a bulk heterojunction cell and the effect of the average distances between these heterointerfaces on the performance of a solar cell in order to show how our detailed balance model includes also these empirically important quantities.

Thomas Kirchartz; Julian Mattheis; Uwe Rau

2008-12-29T23:59:59.000Z

342

Advanced Materials and Nano Technology for Solar Cells  

E-Print Network [OSTI]

AND NANO TECHNOLOGY FOR SOLAR CELLS A thesis submitted inMATERIALS AND NANO TECHNOLOGY FOR SOLAR CELLS In order tosolar cells have been introduced with this technology.

Han, Tao

2014-01-01T23:59:59.000Z

343

Solar Cell Modules With Improved Backskin  

DOE Patents [OSTI]

A laminated solar cell module comprises a front light transmitting support, a plurality of interconnected solar cells encapsulated by a light-transmitting encapsulant material, and an improved backskin formed of an ionomer/nylon alloy. The improved backskin has a toughness and melting point temperature sufficiently great to avoid any likelihood of it being pierced by any of the components that interconnect the solar cells.

Gonsiorawski, Ronald C. (Danvers, MA)

2003-12-09T23:59:59.000Z

344

Bypass diode for a solar cell  

DOE Patents [OSTI]

Bypass diodes for solar cells are described. In one embodiment, a bypass diode for a solar cell includes a substrate of the solar cell. A first conductive region is disposed above the substrate, the first conductive region of a first conductivity type. A second conductive region is disposed on the first conductive region, the second conductive region of a second conductivity type opposite the first conductivity type.

Rim, Seung Bum (Palo Alto, CA); Kim, Taeseok (San Jose, CA); Smith, David D. (Campbell, CA); Cousins, Peter J. (Menlo Park, CA)

2012-03-13T23:59:59.000Z

345

Modification of the Active Layer/PEDOT:PSS Interface by Solvent Additives Resulting in Improvement of the Performance of Organic Solar Cells  

Science Journals Connector (OSTI)

For the additive containing solutions, hexane, thiophene, methanol and DMSO were added in different concentrations into the BTD-F-DKPP:PCBM chlorobenzene solution. ... Surface analysis by UPS and XPS measurements demonstrated that the direct top-cast treatment of annealed PEDOT:PSS layers by the same additive solvents results in changes of the surface chemical composition and consequently its electronic properties by a partial removal of insulating PSS. ... Ye, L.; Jing, Y.; Guo, X.; Sun, H.; Zhang, S.; Zhang, M.; Huo, L.; Hou, J.Remove the Residual Additives toward Enhanced Efficiency with Higher Reproducibility in Polymer Solar Cells J. Phys. ...

Olesia Synooka; Florian Kretschmer; Martin D. Hager; Marcel Himmerlich; Stefan Krischok; Dominik Gehrig; Frédéric Laquai; Ulrich S. Schubert; Gerhard Gobsch; Harald Hoppe

2014-06-30T23:59:59.000Z

346

Improved monolithic tandem solar cell  

SciTech Connect (OSTI)

A single-crystal, monolithic, tandem, photovoltaic solar cell is described which includes (a) an InP substrate having upper and lower surfaces, (b) a first photoactive subcell on the upper surf ace of the InP substrate, (c) a second photoactive subcell on the first subcell; and (d) an optically transparent prismatic cover layer over the second subcell. The first photoactive subcell is GaInAsP of defined composition. The second subcell is InP. The two subcells are lattice matched.

Wanlass, M.W.

1991-04-23T23:59:59.000Z

347

Improved Contact Design Methodology for Solar Cells  

Science Journals Connector (OSTI)

A rigorous approach to optimize the layout of the front contact under the real working condition of the solar cell is proposed.

Li, Jing-Jing; Ding, Ding; Lim, Swee Hoe; Zhang, Yong-Hang

348

Optical Biasing Effects on Multijunction Solar Cells  

Science Journals Connector (OSTI)

We analyze and demonstrate the electrical and optical characterization techniques for multijunction solar cells to explain and quantify measurement artifacts commonly encountered under...

Lim, Swee H; O'Brien, Kevin; Steenbergen, Elizabeth H; Zhang, Yong-Hang

349

Plasmonic Thin-Film Solar Cells  

Science Journals Connector (OSTI)

A combined computational-experimental study optimizing plasmon-enhanced absorption in thin film solar cells presented. We investigate the effect of different geometries where...

Pala, Ragip; White, Justin; Brongersma, Mark

350

Very High Efficiency Solar Cell Modules  

SciTech Connect (OSTI)

The Very High Efficiency Solar Cell (VHESC) program is developing integrated optical system - PV modules for portable applications that operate at greater than 50% efficiency. We are integrating the optical design with the solar cell design, and have entered previously unoccupied design space. Our approach is driven by proven quantitative models for the solar cell design, the optical design, and the integration of these designs. Optical systems efficiency with an optical efficiency of 93% and solar cell device results under ideal dichroic splitting optics summing to 42.7 {+-} 2.5% are described.

Barnett, A.; Kirkpatrick, D.; Honsberg, C.; Moore, D.; Wanlass, M.; Emery, K.; Schwartz, R.; Carlson, D.; Bowden, S.; Aiken, D.; Gray, A.; Kurtz, S.; Kazmerski, L., et al

2009-01-01T23:59:59.000Z

351

Efficient Polymer Solar Cells - Energy Innovation Portal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Laboratory researchers have developed a process for producing more efficient polymer solar cells by increasing light absorption through a thin and uniform light-absorbing...

352

p-Type semiconducting nickel oxide as an efficiency-enhancing anodal interfacial layer in bulk heterojunction solar cells  

DOE Patents [OSTI]

The present invention, in one aspect, relates to a solar cell. In one embodiment, the solar cell includes an anode, a p-type semiconductor layer formed on the anode, and an active organic layer formed on the p-type semiconductor layer, where the active organic layer has an electron-donating organic material and an electron-accepting organic material.

Irwin, Michael D; Buchholz, Donald B; Marks, Tobin J; Chang, Robert P. H.

2014-11-25T23:59:59.000Z

353

Front contact solar cell with formed emitter  

SciTech Connect (OSTI)

A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.

Cousins, Peter John

2014-11-04T23:59:59.000Z

354

Front contact solar cell with formed emitter  

DOE Patents [OSTI]

A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.

Cousins, Peter John (Menlo Park, CA)

2012-07-17T23:59:59.000Z

355

Experimental solar cells on the SUNSAT microsatellite  

SciTech Connect (OSTI)

SUNSAT is an experimental microsatellite, built by the University of Stellenbosch in South Africa. It is completely powered by 4 body-mounted GaAs solar panels, manufactured by EEV Ltd. One solar panel comprises 9 separate strings of experimental solar cells. This paper describes the design and manufacture of the experimental panel, data collection and analysis, and anticipates the experimental flight data.

Hardingham, C.; Simpson, J.; Wood, S.; Cross, T.A. [EEV Ltd., Chelmsford (United Kingdom); Uys, J.F. [Univ. of Stellenbosch (South Africa)

1997-12-31T23:59:59.000Z

356

Universality of non-Ohmic shunt leakage in thin-film solar cells S. Dongaonkar,1,a  

E-Print Network [OSTI]

Universality of non-Ohmic shunt leakage in thin-film solar cells S. Dongaonkar,1,a J. D. Servaites thin-film solar cell types: hydrogenated amorphous silicon a-Si:H p-i-n cells, organic bulk understanding of thin film solar cell device physics, including important module performance variability issues

Alam, Muhammad A.

357

Organizing and Strategizing a Local/Regional Solar Effort  

Broader source: Energy.gov [DOE]

This webinar, "Organizing and Strategizing A Local/Regional Solar Effort," was originally presented on June 14, 2013 as part of the DOE SunShot Initiative's Solar Action Webinar Series. This includes presentations by a number of the program's grant partners, including three cities and one corporate partner, to provide participants' perspectives and present their local solar strategies.

358

Method for processing silicon solar cells  

DOE Patents [OSTI]

The instant invention teaches a novel method for fabricating silicon solar cells utilizing concentrated solar radiation. The solar radiation is concentrated by use of a solar furnace which is used to form a front surface junction and back-surface field in one processing step. The present invention also provides a method of making multicrystalline silicon from amorphous silicon. The invention also teaches a method of texturing the surface of a wafer by forming a porous silicon layer on the surface of a silicon substrate and a method of gettering impurities. Also contemplated by the invention are methods of surface passivation, forming novel solar cell structures, and hydrogen passivation. 2 figs.

Tsuo, Y.S.; Landry, M.D.; Pitts, J.R.

1997-05-06T23:59:59.000Z

359

The role of a LiF layer on the performance of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/Si organic-inorganic hybrid solar cells  

SciTech Connect (OSTI)

We report an ultra-thin layer of lithium fluoride (LiF) between silicon (Si) and aluminum (Al) in a Si/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hybrid solar cell which resulted in a power conversion efficiency (PCE) of 11.09%. The insertion of a thin layer of LiF improved the contact between Si and Al, which decreased the contact resistance from 5.4?×?10{sup ?1} ? cm{sup 2} to 2.6?×?10{sup ?2} ? cm{sup 2}. Also, the electron transport from Si to Al was improved and charge carrier recombination was suppressed. As a result, the short circuit current density, the open circuit voltage, and the fill factor were all improved with the presence of the LiF layer. The solar cell with the LiF/Al bilayer as a cathode displayed a 14.45% enhancement on PCE when compared with the device using pristine Al as a cathode.

Zhang, Yunfang [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123 (China); Department of Mathematics and Physics, Jiangsu University of Science and Technology, Zhenjiang 212003 (China); Liu, Ruiyuan; Lee, Shuit-Tong; Sun, Baoquan, E-mail: bqsun@suda.edu.cn [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123 (China)

2014-02-24T23:59:59.000Z

360

Si concentrator solar cell development. [Final report  

SciTech Connect (OSTI)

This is the final report of a program to develop a commercial, high-efficiency, low-cost concentrator solar cell compatible with Spectrolab`s existing manufacturing infrastructure for space solar cells. The period covered is between 1991 and 1993. The program was funded through Sandia National Laboratories through the DOE concentrator initiative and, was also cost shared by Spectrolab. As a result of this program, Spectrolab implemented solar cells achieving an efficiency of over 19% at 200 to 300X concentration. The cells are compatible with DOE guidelines for a cell price necessary to achieve a cost of electricity of 12 cents a kilowatthour.

Krut, D.D. [Spectrolab, Inc., Sylmar, CA (United States)

1994-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Quantum Junction Solar Cells Jiang Tang,,  

E-Print Network [OSTI]

Quantum Junction Solar Cells Jiang Tang,, Huan Liu,, David Zhitomirsky,§ Sjoerd Hoogland,§ Xihua, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada *S Supporting Information-type and p-type materials to create the first quantum junction solar cells. We present a family

362

Photovoltaics: Cheap, colourful solar cells  

Science Journals Connector (OSTI)

... composed of lead; methylammonium; and iodine or bromine, or both. Semiconductors used in solar ...solarcells ...

2013-04-17T23:59:59.000Z

363

Engineering the Electronic Band Structure for Multiband Solar Cells  

E-Print Network [OSTI]

Band Structure for Multiband Solar Cells N. López 1 , L. A.a number of new concepts of solar cells have been proposed.successful approach several solar cells using semiconductors

Lopez, N.

2011-01-01T23:59:59.000Z

364

Oligo and Poly-thiophene/Zno Hybrid Nanowire Solar Cells  

E-Print Network [OSTI]

ZnO Hybrid Nanowire Solar Cells Alejandro L. Briseno, ThomasZnO Hybrid Nanowire Solar Cells Alejandro L. Briseno, Thomashybrid single nanowire solar cell. End-functionalized oligo-

Briseno, Alejandro L.

2010-01-01T23:59:59.000Z

365

Enabling Thin Silicon Solar Cell Technology  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Enabling Thin Silicon Solar Cell Enabling Thin Silicon Solar Cell Technology Enabling Thin Silicon Solar Cell Technology Print Friday, 21 June 2013 10:49 Generic silicon solar cells showing +45°, -45°, and dendritic crack patterns. The effort to shift U.S. energy reliance from fossil fuels to renewable sources has spurred companies to reduce the cost and increase the reliability of their solar photovoltaics (SPVs). The use of thinner silicon in SPV technologies is being widely adopted because it significantly reduces costs; however, silicon is brittle, and thinner silicon, coupled with other recent trends in SPV technologies (thinner glass, lighter or no metal frames, increased use of certain polymers for encapsulation of the silicon cells), is more susceptible to stress and cracking. When the thin

366

Nanowire-based All Oxide Solar Cells  

SciTech Connect (OSTI)

We present an all-oxide solar cell fabricated from vertically oriented zinc oxide nanowires and cuprous oxide nanoparticles. Our solar cell consists of vertically oriented n-type zinc oxide nanowires, surrounded by a film constructed from p-type cuprous oxide nanoparticles. Our solution-based synthesis of inexpensive and environmentally benign oxide materials in a solar cell would allow for the facile production of large-scale photovoltaic devices. We found that the solar cell performance is enhanced with the addition of an intermediate oxide insulating layer between the nanowires and the nanoparticles. This observation of the important dependence of the shunt resistance on the photovoltaic performance is widely applicable to any nanowire solar cell constructed with the nanowire array in direct contact with one electrode.

Yang*, Benjamin D. Yuhas and Peidong; Yang, Peidong

2008-12-07T23:59:59.000Z

367

Advanced Materials and Nano Technology for Solar Cells  

E-Print Network [OSTI]

MATERIALS AND NANO TECHNOLOGY FOR SOLAR CELLS A thesisADVANCED MATERIALS AND NANO TECHNOLOGY FOR SOLAR CELLS Insilicon layers. The technology to add the intrinsic layer

Han, Tao

2014-01-01T23:59:59.000Z

368

Coating for Silicon Solar Cell by Using Silvaco Software  

E-Print Network [OSTI]

efficiency of SiO 2/Si3N 4silicon solar cell. The solar cell structure was modelled by using Silvaco software

A. Lennie; H. Abdullah; Z. M. Shila; M. A. Hannan

369

Advanced Materials and Nano Technology for Solar Cells  

E-Print Network [OSTI]

CRUZ ADVANCED MATERIALS AND NANO TECHNOLOGY FOR SOLAR CELLS12 3.2 SILVER NANOHAN ADVANCED MATERIALS AND NANO TECHNOLOGY FOR SOLAR CELLS

Han, Tao

2014-01-01T23:59:59.000Z

370

Shiny quantum dots brighten future of solar cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Shiny quantum dots brighten future of solar cells Shiny quantum dots brighten future of solar cells The project demonstrates that superior light-emitting properties of quantum dots...

371

Silicon point contact concentrator solar cells  

SciTech Connect (OSTI)

Experimental results are presented for thin high resistivity concentrator silicon solar cells which use a back-side point-contact geometry. Cells of 130 and 233 micron thickness were fabricated and characterized. The thin cells were found to have efficiencies greater than 22 percent for incident solar intensities of 3 to 30 W/sq cm. Efficiency peaked at 23 percent at 11 W/sq cm measured at 22-25 C. Strategies for obtaining higher efficiencies with this solar cell design are discussed. 8 references.

Sinton, R.A.; Kwark, Y.; Swirhun, S.; Swanson, R.M.

1985-08-01T23:59:59.000Z

372

Structure of All-Polymer Solar Cells Impedes Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Structure of All-Polymer Solar Structure of All-Polymer Solar Cells Impedes Efficiency Structure of All-Polymer Solar Cells Impedes Efficiency Print Wednesday, 27 October 2010 00:00 Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

373

E-Print Network 3.0 - alloy solar cells Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Kaiser Summary: 7212010 1 EE580 - Solar Cells Todd J. Kaiser Lecture 06 Solar Cell Materials & Structures 1... Montana State University: Solar Cells Lecture 6: Solar...

374

Piezo-phototronics effect on nano/microwire solar cells Yan Zhang, Ya Yang and Zhong Lin Wang*  

E-Print Network [OSTI]

Piezo-phototronics effect on nano/microwire solar cells Yan Zhang, Ya Yang and Zhong Lin Wang devices, especially flexible and printed organic/inorganic solar cells fabricated using piezoelectric semiconductor nano/microwires. In this paper, the current­voltage characteristics of a solar cell have been

Wang, Zhong L.

375

Application of Electrospun Nanofibers in Organic Photovoltaics  

Science Journals Connector (OSTI)

This chapter highlights the introduction of organic thin-film solar cells and organic–inorganic hybrid solar cells and the development of electrospun nanofibers for those applications. Organic solar cells need...

Surawut Chuangchote; Takashi Sagawa

2014-01-01T23:59:59.000Z

376

Dye?sensitized Solar Cells for Solar Energy Harvesting  

Science Journals Connector (OSTI)

Dye?sensitized solar cells (DSSCs) also known as Gratzel cells have attracted the interests of researchers to a great extent because of its cost effective and easy manufacturing process without involving highly sophisticated lithographic technique and high cost raw materials as usually seen in conventional solar cell. Based on simple photo?electrochemical process it has got immense potential in converting solar energy to electrical power in remote and desert area where the supply of conventional power is not possible. The overall peak power?production efficiency of dye?sensitized solar cells has been reported around 11 percent so they are best suited to low?density applications and the price?to?performance ratio obtained through these solar cells is superior to others. DSSCs have ability to absorb even diffused sunlight and therefore work in cloudy whether as well without much impact over the efficiency. The present communication deals with a review of our work on DSSCs wherein we have used cost effective natural dyes/pigments as a sensitizer of nc?TiO2 and discussed about various key factors affecting the conversion efficiency of DSSC.

M. S. Roy; Y. S. Deol; Manish Kumar; Narottam Prasad; Yojana Janu

2011-01-01T23:59:59.000Z

377

Nickel-Cathoded Perovskite Solar Cells  

Science Journals Connector (OSTI)

Nickel-Cathoded Perovskite Solar Cells ... Current lead halide perovskite solar cells use high work function (?) precious metals, such as gold (? = 5.1 eV), as the back cathode to maximize the attainable photovoltage. ... We report herein a set of perovskite-type solar cells that use nickel (? = 5.04 eV), an earth-abundant element and non-precious metal, as back cathode and achieve the same open-circuit voltage as gold and an efficiency of 10.4%. ...

Qinglong Jiang; Xia Sheng; Bing Shi; Xinjian Feng; Tao Xu

2014-10-22T23:59:59.000Z

378

Heterojunction solar cell with passivated emitter surface  

DOE Patents [OSTI]

A high-efficiency heterojunction solar cell is described wherein a thin emitter layer (preferably Ga[sub 0.52]In[sub 0.48]P) forms a heterojunction with a GaAs absorber layer. A passivating window layer of defined composition is disposed over the emitter layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the window layer. 1 fig.

Olson, J.M.; Kurtz, S.R.

1994-05-31T23:59:59.000Z

379

Bypass diode for a solar cell  

DOE Patents [OSTI]

Methods of fabricating bypass diodes for solar cells are described. In once embodiment, a method includes forming a first conductive region of a first conductivity type above a substrate of a solar cell. A second conductive region of a second conductivity type is formed on the first conductive region. In another embodiment, a method includes forming a first conductive region of a first conductivity type above a substrate of a solar cell. A second conductive region of a second conductivity type is formed within, and surrounded by, an uppermost portion of the first conductive region but is not formed in a lowermost portion of the first conductive region.

Rim, Seung Bum; Kim, Taeseok; Smith, David D; Cousins, Peter J

2013-11-12T23:59:59.000Z

380

LQ Energy LDK Solar Q Cells JV | Open Energy Information  

Open Energy Info (EERE)

LQ Energy LDK Solar Q Cells JV Jump to: navigation, search Name: LQ Energy (LDK Solar & Q-Cells JV) Place: Saxony-Anhalt, Germany Sector: Solar Product: Germany-based JV between...

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Indium oxide/n-silicon heterojunction solar cells  

DOE Patents [OSTI]

A high photo-conversion efficiency indium oxide/n-silicon heterojunction solar cell is spray deposited from a solution containing indium trichloride. The solar cell exhibits an Air Mass One solar conversion efficiency in excess of about 10%.

Feng, Tom (Morris Plains, NJ); Ghosh, Amal K. (New Providence, NJ)

1982-12-28T23:59:59.000Z

382

Simulation of the Buxton-Clarke Model for Organic Photovoltaic Cells  

E-Print Network [OSTI]

Simulation of the Buxton-Clarke Model for Organic Photovoltaic Cells J.W. Jerome Department 02912 USA Abstract--Modeling of organic photovoltaic (OPV) cells can be achieved by adaptation of drift-V curves and carrier current densities. I. INTRODUCTION Organic solar cells are the topic of extensive

Jerome, Joseph W.

383

Dye-sensitized solar cells  

DOE Patents [OSTI]

A low-cost dye-sensitized Schottky barrier solar cell comprised of a substrate of semiconductor with an ohmic contact on one face, a sensitizing dye adsorbed onto the opposite face of the semiconductor, a transparent thin-film layer of a reducing agent over the dye, and a thin-film layer of metal over the reducing agent. The ohmic contact and metal layer constitute electrodes for connection to an external circuit and one or the other or both are made transparent to permit light to penetrate to the dye and be absorbed therein for generating electric current. The semiconductor material chosen to be the substrate is one having a wide bandgap and which therefore is transparent; the dye selected is one having a ground state within the bandgap of the semiconductor to generate carriers in the semiconductor, and a first excited state above the conduction band edge of the semiconductor to readily conduct electrons from the dye to the semiconductor; the reducing agent selected is one having a ground state above the ground state of the sensitizer to provide a plentiful source of electrons to the dye during current generation and thereby enhance the generation; and the metal for the thin-film layer of metal is selected to have a Fermi level in the vicinity of or above the ground state of the reducing agent to thereby amply supply electrons to the reducing agent.

Skotheim, Terje A. [Berkeley, CA

1980-03-04T23:59:59.000Z

384

Dye-sensitized solar cells  

DOE Patents [OSTI]

A low-cost dye-sensitized Schottky barrier solar cell is comprised of a substrate of semiconductor with an ohmic contact on one face, a sensitizing dye adsorbed onto the opposite face of the semiconductor, a transparent thin-film layer of a reducing agent over the dye, and a thin-film layer of metal over the reducing agent. The ohmic contact and metal layer constitute electrodes for connection to an external circuit and one or the other or both are made transparent to permit light to penetrate to the dye and be absorbed therein for generating electric current. The semiconductor material chosen to be the substrate is one having a wide bandgap and which therefore is transparent; the dye selected is one having a ground state within the bandgap of the semiconductor to generate carriers in the semiconductor, and a first excited state above the conduction band edge of the semiconductor to readily conduct electrons from the dye to the semiconductor; the reducing agent selected is one having a ground state above the ground state of the sensitizer to provide a plentiful source of electrons to the dye during current generation and thereby enhance the generation; and the metal for the thin-film layer of metal is selected to have a Fermi level in the vicinity of or above the ground state of the reducing agent to thereby amply supply electrons to the reducing agent. 3 figs.

Skotheim, T.A.

1980-03-04T23:59:59.000Z

385

Modeling Light Trapping in Nanostructured Solar Cells  

Science Journals Connector (OSTI)

The integration of nanophotonic and plasmonic structures with solar cells offers the ability to control and confine light in nanoscale dimensions. These nanostructures can be used to couple incident sunlight into both localized and guided modes, enhancing ...

Vivian E. Ferry; Albert Polman; Harry A. Atwater

2011-11-14T23:59:59.000Z

386

Application of lasers in solar cell technologies  

Science Journals Connector (OSTI)

The possibilities for applying lasers to the fabrication of solar cells (the laser texturing of silicon surfaces and pulsed laser deposition of indium tin oxide (ITO) thin films) are demonstrated.

D. A. Zuev; A. A. Lotin; O. A. Novodvorsky…

2012-10-01T23:59:59.000Z

387

Enhanced Photon Recycling in Multijunction Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a nd J .A. R ogers, " Device A rchitectures f or E nhanced Photon Recycling in Thin---Film MulQjuncQon Solar Cells." Adv. Energy M ater. (2014). DOI: 1 0.1002aenm.201400919...

388

Structure of All-Polymer Solar Cells Impedes Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

389

Structure of All-Polymer Solar Cells Impedes Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

390

Structure of All-Polymer Solar Cells Impedes Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

391

Structure of All-Polymer Solar Cells Impedes Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

392

Structure of All-Polymer Solar Cells Impedes Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

393

Hybrid Silicon Nanocone-Polymer Solar Cells Sangmoo Jeong,  

E-Print Network [OSTI]

alternative energy solution. KEYWORDS: Nanotexture, solar cell, heterojunction, conductive polymer, light solar cell.1 Conventional Si solar cells have p-n junctions inside for an efficient extraction of lightHybrid Silicon Nanocone-Polymer Solar Cells Sangmoo Jeong, Erik C. Garnett, Shuang Wang, Zongfu Yu

Cui, Yi

394

Roll-to-Roll Nanomanufacturing Processes and Applications to Display and Solar Cell Devices  

E-Print Network [OSTI]

Roll-to-Roll Nanomanufacturing Processes and Applications to Display and Solar Cell Devices% enhanced the power efficiency in organic solar cells as compared with devices made by ITO. BIOGRAPHY L. Jay related to nanotechnologies and photonics, including symposium chair of two MRS topical conferences

Keaveny, Tony

395

Intertwined Aligned Carbon Nanotube Fiber Based Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

Two fibers are twined together to produce the fiber-shaped solar cell. ... Dye cations are reduced to their neutral state by I– ions with production of I3– ions, which are reverted to I– ions after acceptance of electrons at the counter electrode. ... Aligned Carbon Nanotube Sheets for the Electrodes of Organic Solar Cells ...

Tao Chen; Longbin Qiu; Zhenbo Cai; Feng Gong; Zhibin Yang; Zhongsheng Wang; Huisheng Peng

2012-04-13T23:59:59.000Z

396

High-efficiency solar cell and method for fabrication  

DOE Patents [OSTI]

A high-efficiency 3- or 4-junction solar cell is disclosed with a theoretical AM0 energy conversion efficiency of about 40%. The solar cell includes p-n junctions formed from indium gallium arsenide nitride (InGaAsN), gallium arsenide (GaAs) and indium gallium aluminum phosphide (InGaAlP) separated by n-p tunnel junctions. An optional germanium (Ge) p-n junction can be formed in the substrate upon which the other p-n junctions are grown. The bandgap energies for each p-n junction are tailored to provide substantially equal short-circuit currents for each p-n junction, thereby eliminating current bottlenecks and improving the overall energy conversion efficiency of the solar cell. Additionally, the use of an InGaAsN p-n junction overcomes super-bandgap energy losses that are present in conventional multi-junction solar cells. A method is also disclosed for fabricating the high-efficiency 3- or 4-junction solar cell by metal-organic chemical vapor deposition (MOCVD).

Hou, Hong Q. (Albuquerque, NM); Reinhardt, Kitt C. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

397

High-efficiency solar cell and method for fabrication  

DOE Patents [OSTI]

A high-efficiency 3- or 4-junction solar cell is disclosed with a theoretical AM0 energy conversion efficiency of about 40%. The solar cell includes p-n junctions formed from indium gallium arsenide nitride (InGaAsN), gallium arsenide (GaAs) and indium gallium aluminum phosphide (InGaAlP) separated by n-p tunnel junctions. An optional germanium (Ge) p-n junction can be formed in the substrate upon which the other p-n junctions are grown. The bandgap energies for each p-n junction are tailored to provide substantially equal short-circuit currents for each p-n junction, thereby eliminating current bottlenecks and improving the overall energy conversion efficiency of the solar cell. Additionally, the use of an InGaAsN p-n junction overcomes super-bandgap energy losses that are present in conventional multi-junction solar cells. A method is also disclosed for fabricating the high-efficiency 3- or 4-junction solar cell by metal-organic chemical vapor deposition (MOCVD). 4 figs.

Hou, H.Q.; Reinhardt, K.C.

1999-08-31T23:59:59.000Z

398

Development efforts on silicon solar cells  

SciTech Connect (OSTI)

This report presents a summary of the major results from the silicon high-concentration solar cell program at Stanford University from the period 1983--1990. Following a detailed design study, efforts were focused upon experimental verification of the modeled results that predicted 28% efficiencies for a new 500X concentrator solar cell design. A history of the research progress is given detailing the critical experiments that enabled the demonstration of 19.6% cells in 1983, then subsequent improvements culminating in efficiencies over 28% by 1987. In addition to laboratory efficiency improvements, the report details advances in the understanding of the fundamental device physics and modeling of silicon solar cell operation. The latter stages of the program included the development of module-ready cells in large quantity for the EPRI prototype 500X concentrator modules. Several of these 48-cell modules are currently in the field under test.

Sinton, R.A.; Swanson, R.M. (Stanford Univ., CA (United States))

1992-02-01T23:59:59.000Z

399

Argonne CNM Highlight: New equation could advance research in solar cell  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

nanoscale organic semiconductor junctions nanoscale organic semiconductor junctions Current-voltage characteristics and energetics of coulombically bound charge carrier pairs (copper phthalocyanine and boron subphthalocyanine chloride donors, and a fullerene acceptor) at the heterojunction in organic semiconductor junctions. New equation could advance research in solar cell materials Scientists in the Nanophotonics Group, the University of Michigan, and Northwestern University have developed a ground-breaking equation for organic semiconductor junctions. Organic, or "plastic" electronics, are a relatively new technology with the prospect of providing ultracheap, lightweight, and flexible electronic applications such as organic solar cells. Their model is successfully applied to two archetype, planar

400

ZnO-TiO2 Core-Shell Nanorod/P3HT Solar Cells Lori E. Greene, Matt Law, Benjamin D. Yuhas, and Peidong Yang*  

E-Print Network [OSTI]

diffusion bottleneck, has been addressed in organic and organic-inorganic hybrid solar cells by adoptingZnO-TiO2 Core-Shell Nanorod/P3HT Solar Cells Lori E. Greene, Matt Law, Benjamin D. Yuhas-inorganic solar cell architecture based on ZnO-TiO2 core-shell nanorod arrays encased in the hole

Yang, Peidong

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Cheap solar cells tempt businesses  

Science Journals Connector (OSTI)

... of Valencia in Spain, first heard about perovskites, the latest hope for low-cost solar power, in April last year. Unlike the slabs of purified silicon at the heart ... in April last year. Unlike the slabs of purified silicon at the heart of the solar ...

Richard Van Noorden

2014-09-24T23:59:59.000Z

402

NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL  

E-Print Network [OSTI]

by Dye-Sensitized Photovoltaic cells. Inorganic Chemistry,by Dye-Sensitized Photovoltaic Cells. Inorganic ChemistryThe characteristics of a photovoltaic cell. Generally,

Phuyal, Dibya

2012-01-01T23:59:59.000Z

403

Cheaper Silicon Found Effective for Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cheaper Silicon Found Effective for Solar Cells Cheaper Silicon Found Effective for Solar Cells A research team from the University of California at Berkeley, Lawrence Berkeley National Laboratory, Argonne National Laboratory, and Pacific Northwest National Laboratory, using U.S. Department of Energy (DOE) synchrotron light sources, has successfully shown that inexpensive silicon has the potential to be used for photovoltaic (PV) devices, commonly known as solar cells. In a new approach-whose findings were published online in Nature Materials (August 14, 2005)-the researchers used nanodefect engineering to control transition metal contamination in order to produce impurity-rich, performance-enhanced multicrystalline silicon (mc-Si) material. "Solar energy is often touted as the most promising and secure energy

404

Solar Energy Materials & Solar Cells 88 (2005) 6573 Investigation of pulsed non-melt laser annealing  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 88 (2005) 65­73 Investigation of pulsed non-melt laser annealing on the film properties and performance of Cu(In,Ga)Se2 solar cells Xuege Wanga , Sheng S. Lia,�, C time to modify near- surface defects and related junction properties in Cu(In,Ga)Se2 (CIGS) solar cells

Anderson, Timothy J.

405

* Corresponding author. Solar Energy Materials & Solar Cells 58 (1999) 209}218  

E-Print Network [OSTI]

* Corresponding author. Solar Energy Materials & Solar Cells 58 (1999) 209}218 A highly e solar cells based on the CdTe/CdS heterojunction still exhibits quite a few open problems$cient and stable CdTe/CdS thin "lm solar cell N. Romeo, A. Bosio, R. Tedeschi*, A. Romeo, V. Canevari Dipartimento

Romeo, Alessandro

406

Laboratory experiments with silicon solar cells  

Science Journals Connector (OSTI)

The uses of silicon solar cells as subjects of experiments in undergraduate teaching laboratories are discussed. The basic theory of these cells is presented including equivalent circuits and characteristic equations. Fundamental experiments on the power output and efficiency which are appropriate for non?science majors’ courses are detailed as well as more advanced experiments on cell parameters. Experimental results and agreement with theory are presented for a typical inexpensive cell.

D. W. Kammer; M. A. Ludington

1977-01-01T23:59:59.000Z

407

NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL  

E-Print Network [OSTI]

technologies. Silicon photovoltaic module cost have continuegeneration photovoltaic panels due to their low cost, easycost-efficient multiple junction solar devices with remarkably high efficiency should be the direction and objective of photovoltaic

Phuyal, Dibya

2012-01-01T23:59:59.000Z

408

Improving Solar-Cell Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

films with different PID2 contents. From L. Lu et al., Nat. Photonics 8, 716 (2014). New light has been shed on solar power generation using devices made with polymers, thanks to...

409

Sandia National Laboratories: high-efficiency solar cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

cells Sandia and EMCORE: Solar Photovoltaics, Fiber Optics, MODE, and Energy Efficiency On March 29, 2013, in Concentrating Solar Power, Energy, Partnership, Photovoltaic,...

410

Investigation of the Role of Trap States in Solar Cell Reliability using Photothermal Deflection Spectroscopy  

E-Print Network [OSTI]

solar cell efficiencies for various photovoltaic technologiessolar cells use luminescent solar concentrator technology tosolar cell efficiencies for various photovoltaic technologies

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

411

Fuzzy-Logic Based Computation for Parameters Identification of Solar Cell Models  

Science Journals Connector (OSTI)

During the last few years, the production of the organic solar cells is rising in photovoltaic domain; it is due to the simple production technology such as: roll-to-roll or ... This fact by itself can reduce the...

Toufik Bendib; Fayçal Djeffal

2014-01-01T23:59:59.000Z

412

DOI: 10.1002/adfm.200600489 Accurate Measurement and Characterization of Organic Solar  

E-Print Network [OSTI]

source for clean and renewable energy.[1­6] Organic solar cells are divided into two main categories where they could be put into commercial applications. For the healthy development of this technology set up in Germany, Japan, and elsewhere. In the 1980s US and international standards were developed

413

Investigating the efficiency of Silicon Solar cells at  

E-Print Network [OSTI]

Investigating the efficiency of Silicon Solar cells at different temperatures and wavelengths to study the characteristics of silicon photovoltaic cells (solar cells). We vary the wavelength of light as well as the temperature of the solar cell to investigate how the open voltage across the cell varies

Attari, Shahzeen Z.

414

High-efficiency concentrator silicon solar cells  

SciTech Connect (OSTI)

This report presents results from extensive process development in high-efficiency Si solar cells. An advanced design for a 1.56-cm{sup 2} cell with front grids achieved 26% efficiency at 90 suns. This is especially significant since this cell does not require a prismatic cover glass. New designs for simplified backside-contact solar cells were advanced from a status of near-nonfunctionality to demonstrated 21--22% for one-sun cells in sizes up to 37.5 cm{sup 2}. An efficiency of 26% was achieved for similar 0.64-cm{sup 2} concentrator cells at 150 suns. More fundamental work on dopant-diffused regions is also presented here. The recombination vs. various process and physical parameters was studied in detail for boron and phosphorous diffusions. Emitter-design studies based solidly upon these new data indicate the performance vs design parameters for a variety of the cases of most interest to solar cell designers. Extractions of p-type bandgap narrowing and the surface recombination for p- and n-type regions from these studies have a generality that extends beyond solar cells into basic device modeling. 68 refs., 50 figs.

Sinton, R.A.; Cuevas, A.; King, R.R.; Swanson, R.M. (Stanford Univ., CA (USA). Solid-State Electronics Lab.)

1990-11-01T23:59:59.000Z

415

Liquid cooled, linear focus solar cell receiver  

DOE Patents [OSTI]

Separate structures for electrical insulation and thermal conduction are established within a liquid cooled, linear focus solar cell receiver for use with parabolic or Fresnel optical concentrators. The receiver includes a V-shaped aluminum extrusion having a pair of outer faces each formed with a channel receiving a string of solar cells in thermal contact with the extrusion. Each cell string is attached to a continuous glass cover secured within the channel with spring clips to isolate the string from the external environment. Repair or replacement of solar cells is effected simply by detaching the spring clips to remove the cover/cell assembly without interrupting circulation of coolant fluid through the receiver. The lower surface of the channel in thermal contact with the cells of the string is anodized to establish a suitable standoff voltage capability between the cells and the extrusion. Primary electrical insulation is provided by a dielectric tape disposed between the coolant tube and extrusion. Adjacent solar cells are soldered to interconnect members designed to accommodate thermal expansion and mismatches. The coolant tube is clamped into the extrusion channel with a releasably attachable clamping strip to facilitate easy removal of the receiver from the coolant circuit.

Kirpich, Aaron S. (Broomall, PA)

1985-01-01T23:59:59.000Z

416

Liquid cooled, linear focus solar cell receiver  

DOE Patents [OSTI]

Separate structures for electrical insulation and thermal conduction are established within a liquid cooled, linear focus solar cell receiver for use with parabolic or Fresnel optical concentrators. The receiver includes a V-shaped aluminum extrusion having a pair of outer faces each formed with a channel receiving a string of solar cells in thermal contact with the extrusion. Each cell string is attached to a continuous glass cover secured within the channel with spring clips to isolate the string from the external environment. Repair or replacement of solar cells is effected simply by detaching the spring clips to remove the cover/cell assembly without interrupting circulation of coolant fluid through the receiver. The lower surface of the channel in thermal contact with the cells of the string is anodized to establish a suitable standoff voltage capability between the cells and the extrusion. Primary electrical insulation is provided by a dielectric tape disposed between the coolant tube and extrusion. Adjacent solar cells are soldered to interconnect members designed to accommodate thermal expansion and mismatches. The coolant tube is clamped into the extrusion channel with a releasably attachable clamping strip to facilitate easy removal of the receiver from the coolant circuit.

Kirpich, A.S.

1983-12-08T23:59:59.000Z

417

Method of restoring degraded solar cells  

DOE Patents [OSTI]

Amorphous silicon solar cells have been shown to have efficiencies which degrade as a result of long exposure to light. Annealing such cells in air at a temperature of about 200 C for at least 30 minutes restores their efficiency. 2 figs.

Staebler, D.L.

1983-02-01T23:59:59.000Z

418

Method of restoring degraded solar cells  

DOE Patents [OSTI]

Amorphous silicon solar cells have been shown to have efficiencies which degrade as a result of long exposure to light. Annealing such cells in air at a temperature of about 200.degree. C. for at least 30 minutes restores their efficiency.

Staebler, David L. (Lawrenceville, NJ)

1983-01-01T23:59:59.000Z

419

Solar thermal organic rankine cycle for micro-generation  

Science Journals Connector (OSTI)

The conceptual design of an Organic Rankine Cycle (ORC) driven by solar thermal energy is developed for the decentralized production of electricity of up to 50 kW. Conventional Rankine Cycle uses water as the working fluid whereas ORC uses organic compound as the working fluid and it is particularly suitable for low temperature applications. The ORC and the solar collector will be sized according to the solar flux distribution in the Republic of Yemen for the required power output of 50 kW. This will be a micro power generation system that consists of two cycles the solar thermal cycle that harness solar energy and the power cycle which is the ORC that generates electricity. As for the solar thermal cycle heat transfer fluid (HTF) circulates the cycle while absorbing thermal energy from the sun through a parabolic trough collector and then storing it in a thermal storage to increase system efficiency and maintains system operation during low radiation. The heat is then transferred to the organic fluid in the ORC via a heat exchanger. The organic fluids to be used and analyzed in the ORC are hydrocarbons R600a and R290.

2012-01-01T23:59:59.000Z

420

The Importance of Domain Size and Purity in High-Efficiency Organic Solar  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Importance of Domain Size and Purity in High-Efficiency Organic Solar Cells Print The Importance of Domain Size and Purity in High-Efficiency Organic Solar Cells Print The efficiency of polymer/organic photovoltaic cells hinges on excitons-electron/hole pairs energized by sunlight-getting to the interfaces of donor and acceptor domains quickly, before recombining. At the interfaces, they become free charges that must then reach device electrodes. With the discovery of mixed domains of donor and acceptor molecules, many have pictured the excitons' journey as easy (interfaces are everywhere) but the charges' journey as precarious (interfaces are everywhere). Instead, using a combination of x-ray scattering and microscopy techniques, researchers have found that excitons may actually not fare so well in mixed domains but need access to pure aggregates to efficiently convert into charges. The smaller the aggregates, the better, allowing increased interfacial area and dramatic increases in device performance.

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

The Importance of Domain Size and Purity in High-Efficiency Organic Solar  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Importance of Domain Size and Purity in High-Efficiency Organic Solar Cells Print The Importance of Domain Size and Purity in High-Efficiency Organic Solar Cells Print The efficiency of polymer/organic photovoltaic cells hinges on excitons-electron/hole pairs energized by sunlight-getting to the interfaces of donor and acceptor domains quickly, before recombining. At the interfaces, they become free charges that must then reach device electrodes. With the discovery of mixed domains of donor and acceptor molecules, many have pictured the excitons' journey as easy (interfaces are everywhere) but the charges' journey as precarious (interfaces are everywhere). Instead, using a combination of x-ray scattering and microscopy techniques, researchers have found that excitons may actually not fare so well in mixed domains but need access to pure aggregates to efficiently convert into charges. The smaller the aggregates, the better, allowing increased interfacial area and dramatic increases in device performance.

422

The Importance of Domain Size and Purity in High-Efficiency Organic Solar  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Importance of Domain Size and Purity in High-Efficiency Organic Solar Cells Print The Importance of Domain Size and Purity in High-Efficiency Organic Solar Cells Print The efficiency of polymer/organic photovoltaic cells hinges on excitons-electron/hole pairs energized by sunlight-getting to the interfaces of donor and acceptor domains quickly, before recombining. At the interfaces, they become free charges that must then reach device electrodes. With the discovery of mixed domains of donor and acceptor molecules, many have pictured the excitons' journey as easy (interfaces are everywhere) but the charges' journey as precarious (interfaces are everywhere). Instead, using a combination of x-ray scattering and microscopy techniques, researchers have found that excitons may actually not fare so well in mixed domains but need access to pure aggregates to efficiently convert into charges. The smaller the aggregates, the better, allowing increased interfacial area and dramatic increases in device performance.

423

Photonic Design: From Fundamental Solar Cell Physics to Computational Inverse Design  

E-Print Network [OSTI]

limit for any solar cell technology will require lightof next-generation solar cell technologies, examining thes prospects as a solar cell technology. There is a well-

Miller, Owen Dennis

2012-01-01T23:59:59.000Z

424

Core/Shell heterojunction nanowire solar cell fabricated by lithographically patterned nanowire electrodeposition method  

E-Print Network [OSTI]

in state of the art solar cell technology and how we canand second generation solar cell technology and currentof the present solar cell technology by synthesizing metal/

Ghosh, Somnath

2012-01-01T23:59:59.000Z

425

The Silicon Solar Cell Turns 50  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Daryl Chapin, Calvin Fuller, and Gerald Daryl Chapin, Calvin Fuller, and Gerald Pearson likely never imagined inventing a solar cell that would revolutionize the photovoltaics industry. There wasn't even a photovoltaics industry to revolu- tionize in 1952. The three scientists were simply trying to solve problems within the Bell tele- phone system. Traditional dry cell batteries, which worked fine in mild climates, degraded too rapidly in the tropics and ceased to work when needed. The company therefore asked its famous research arm-Bell Laboratories-to explore alternative sources of freestand- ing power. Daryl Chapin got the assign- ment. At that time, his job was to test wind machines, thermoelectric gensets, and steam engines. Being a solar energy enthusiast, he suggested that the investi- gation include solar cells. His supervisor

426

Fabricating solar cells with silicon nanoparticles  

DOE Patents [OSTI]

A laser contact process is employed to form contact holes to emitters of a solar cell. Doped silicon nanoparticles are formed over a substrate of the solar cell. The surface of individual or clusters of silicon nanoparticles is coated with a nanoparticle passivation film. Contact holes to emitters of the solar cell are formed by impinging a laser beam on the passivated silicon nanoparticles. For example, the laser contact process may be a laser ablation process. In that case, the emitters may be formed by diffusing dopants from the silicon nanoparticles prior to forming the contact holes to the emitters. As another example, the laser contact process may be a laser melting process whereby portions of the silicon nanoparticles are melted to form the emitters and contact holes to the emitters.

Loscutoff, Paul; Molesa, Steve; Kim, Taeseok

2014-09-02T23:59:59.000Z

427

EELE408 Photovoltaics Lecture 16: Silicon Solar Cell Fabrication Techniques  

E-Print Network [OSTI]

;3 Screen Printed Solar Cells · Firing the contacts ­ The furnace heats the cell to a high temperature & Metal Closeup 14 Front and Back of Screen Printed Solar Cell 15 Crystallization Furnace for Ingot1 EELE408 Photovoltaics Lecture 16: Silicon Solar Cell Fabrication Techniques Dr. Todd J. Kaiser

Kaiser, Todd J.

428

Experiment Based Teaching of Solar Cell Operation and Characterization Using the SolarLab Platform  

E-Print Network [OSTI]

(MSc and PhD level) taught at the Department of Energy Technology, Aalborg University. SOLAR CELLExperiment Based Teaching of Solar Cell Operation and Characterization Using the SolarLab Platform and interested in almost any topic. This paper presents such a hands-on approach for teaching solar cell

Sera, Dezso

429

Origami-enabled deformable silicon solar cells  

SciTech Connect (OSTI)

Deformable electronics have found various applications and elastomeric materials have been widely used to reach flexibility and stretchability. In this Letter, we report an alternative approach to enable deformability through origami. In this approach, the deformability is achieved through folding and unfolding at the creases while the functional devices do not experience strain. We have demonstrated an example of origami-enabled silicon solar cells and showed that this solar cell can reach up to 644% areal compactness while maintaining reasonable good performance upon cyclic folding/unfolding. This approach opens an alternative direction of producing flexible, stretchable, and deformable electronics.

Tang, Rui; Huang, Hai; Liang, Hanshuang; Liang, Mengbing [School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287 (United States); Tu, Hongen; Xu, Yong [Electrical and Computer Engineering, Wayne State University, 5050 Anthony Wayne Dr., Detroit, Michigan 48202 (United States); Song, Zeming; Jiang, Hanqing, E-mail: hanqing.jiang@asu.edu [School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287 (United States); Yu, Hongyu, E-mail: hongyu.yu@asu.edu [School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287 (United States); School of Earth and Space Exploration, Arizona State University, Tempe, Arizona 85287 (United States)

2014-02-24T23:59:59.000Z

430

High throughput solar cell ablation system  

DOE Patents [OSTI]

A solar cell is formed using a solar cell ablation system. The ablation system includes a single laser source and several laser scanners. The laser scanners include a master laser scanner, with the rest of the laser scanners being slaved to the master laser scanner. A laser beam from the laser source is split into several laser beams, with the laser beams being scanned onto corresponding wafers using the laser scanners in accordance with one or more patterns. The laser beams may be scanned on the wafers using the same or different power levels of the laser source.

Harley, Gabriel; Pass, Thomas; Cousins, Peter John; Viatella, John

2012-09-11T23:59:59.000Z

431

High throughput solar cell ablation system  

DOE Patents [OSTI]

A solar cell is formed using a solar cell ablation system. The ablation system includes a single laser source and several laser scanners. The laser scanners include a master laser scanner, with the rest of the laser scanners being slaved to the master laser scanner. A laser beam from the laser source is split into several laser beams, with the laser beams being scanned onto corresponding wafers using the laser scanners in accordance with one or more patterns. The laser beams may be scanned on the wafers using the same or different power levels of the laser source.

Harley, Gabriel; Pass, Thomas; Cousins, Peter John; Viatella, John

2014-10-14T23:59:59.000Z

432

Solar cell contact formation using laser ablation  

DOE Patents [OSTI]

The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes.

Harley, Gabriel; Smith, David; Cousins, Peter

2012-12-04T23:59:59.000Z

433

Solar cell contact formation using laser ablation  

DOE Patents [OSTI]

The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline materiat layer; and forming conductive contacts in the plurality of contact holes.

Harley, Gabriel; Smith, David D.; Cousins, Peter John

2014-07-22T23:59:59.000Z

434

The influence of molecular orientation on organic bulk heterojunction...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The influence of molecular orientation on organic bulk heterojunction solar cells The influence of molecular orientation on organic bulk heterojunction solar cells Print Monday, 28...

435

Electroabsorption measurements and built-in potentials in amorphous silicon pin solar cells  

E-Print Network [OSTI]

and the capacitance of such devices. We apply this technique to hydrogenated amorphous silicon a-Si:H -based solar-6951 96 04246-5 The internal electric fields of amporphous silicon a- Si:H -based p­i­n solar cells on electroluminescent organic heterostructure diodes . We con- firmed this interpretation by studying a-Si:H n

Schiff, Eric A.

436

Tuning of Plasmonic Nanoparticles for Enhancing Solar Cell Efficiency  

Science Journals Connector (OSTI)

Plasmonic nanoparticles based thin film solar cells plays a crucial role in designing the current breed of third generation solar cells. To decrease the material cost for economic viability without compromising o...

Somik Chakravarty; Lingeswaran Arunagiri…

2014-01-01T23:59:59.000Z

437

III-V Compound Semiconductor Nanowire Solar Cells  

Science Journals Connector (OSTI)

Nanowire-array solar cells with core-multi-shell and axial junction were fabricated using selective-area MOVPE. Advantages are efficient light trapping and flexible solar cell by...

Fukui, Takashi; Nakai, Eiji; Chen, MuYi; Tomioka, Katsuhiro

438

Metal Nanoparticles Enhanced Optical Absorption in Thin Film Solar Cells  

Science Journals Connector (OSTI)

The plasmonic enhanced absorption for thin film solar cells with silver nanoparticles (NPs) deposited on top of the amorphous silicon film (a-Si:H) solar cells and embedded inside the...

Xie, Wanlu; Liu, Fang; Qu, Di; Xu, Qi; Huang, Yidong

439

3D Photonic Crystals for Photon Management in Solar Cells  

Science Journals Connector (OSTI)

Photon management is a key element to optimize the optical and electro-optical performance of solar cells. The potential of 3D photonic crystals for photon management in solar cells...

Wehrspohn, Ralf; Sprafke, Alexander

440

Heterojunction solar cells produced by porous silicon layer transfer technology  

Science Journals Connector (OSTI)

In this paper, we present the result of heterojunction solar cells based on porous silicon layer transfer technology. a-Si/c-Si structured solar cells were prepared in which the c-Si ... was investigated. The spe...

Zhihao Yue; Honglie Shen; Lei Zhang; Bin Liu; Chao Gao; Hongjie Lv

2012-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Alternative technology used to manufacture semitransparent monocrystalline silicon solar cells  

Science Journals Connector (OSTI)

This paper presents the manufacturing technology of a new semitransparent solar cell that can be used for building integrated ... anisotropic etching. The efficiency of the semitransparent solar cell is 6.12 % in...

Enik? Bándy; Márta Rencz

2013-06-01T23:59:59.000Z

442

Method of fabricating a solar cell  

DOE Patents [OSTI]

Methods of fabricating solar cells are described. A porous layer may be formed on a surface of a substrate, the porous layer including a plurality of particles and a plurality of voids. A solution may be dispensed into one or more regions of the porous layer to provide a patterned composite layer. The substrate may then be heated.

Pass, Thomas; Rogers, Robert

2014-02-25T23:59:59.000Z

443

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network [OSTI]

energy conversion efficiency of solar cells increased steadily in the last decade through enhanced photon absorption and charge carrier

Shao, Qinghui

2009-01-01T23:59:59.000Z

444

Hydrogen-Evolving Solar Cells  

Science Journals Connector (OSTI)

...PHOTOELECTROLYSIS OF WATER IN CELLS WITH SRTIO3 ANODES, APPLIED PHYSICS LETTERS 28 : 241...PHOTOELECTROLYSIS OF WATER IN CELLS WITH TIO2 ANODES, MATERIALS RESEARCH BULLETIN 10...WATER USING SINGLE-CRYSTAL ALPHA-FE2O3 ANODES, MATERIALS RESEARCH BULLETIN 11...

Adam Heller

1984-03-16T23:59:59.000Z

445

AgBiS2 Semiconductor-Sensitized Solar Cells  

Science Journals Connector (OSTI)

AgBiS2 Semiconductor-Sensitized Solar Cells ... We present a new ternary semiconductor sensitizer-AgBiS2 for solar cells. ... Liquid-junction semiconductor-sensitized solar cells were fabricated from the synthesized AgBiS2 semiconductor. ...

Pen-Chi Huang; Wei-Chih Yang; Ming-Way Lee

2013-08-16T23:59:59.000Z

446

Hole Selective MoOx Contact for Silicon Solar Cells  

Science Journals Connector (OSTI)

Hole Selective MoOx Contact for Silicon Solar Cells ... This work has important implications toward enabling a novel class of junctionless devices with applications for solar cells, light-emitting diodes, photodetectors, and transistors. ... Junctionless solar cells; silicon photovoltaics; heterojunctions; dopant-free contact; molybdenum trioxide ...

Corsin Battaglia; Xingtian Yin; Maxwell Zheng; Ian D. Sharp; Teresa Chen; Stephen McDonnell; Angelica Azcatl; Carlo Carraro; Biwu Ma; Roya Maboudian; Robert. M. Wallace; Ali Javey

2014-01-07T23:59:59.000Z

447

Flexible thermal cycle test equipment for concentrator solar cells  

DOE Patents [OSTI]

A system and method for performing thermal stress testing of photovoltaic solar cells is presented. The system and method allows rapid testing of photovoltaic solar cells under controllable thermal conditions. The system and method presents a means of rapidly applying thermal stresses to one or more photovoltaic solar cells in a consistent and repeatable manner.

Hebert, Peter H. (Glendale, CA); Brandt, Randolph J. (Palmdale, CA)

2012-06-19T23:59:59.000Z

448

MORPHOLOGY DEPENDENT SHORT CIRCUIT CURRENT IN BULK HETEROJUNCTION SOLAR CELL  

E-Print Network [OSTI]

a relatively inexpensive option for the future solar cell technology, provided its efficiency increases beyondMORPHOLOGY DEPENDENT SHORT CIRCUIT CURRENT IN BULK HETEROJUNCTION SOLAR CELL Biswajit Ray, Pradeep, West Lafayette, Indiana, USA ABSTRACT Polymer based bulk heterostructure (BH) solar cell offers

Alam, Muhammad A.

449

Simulations of solar cell absorption enhancement using resonant modes  

E-Print Network [OSTI]

Simulations of solar cell absorption enhancement using resonant modes of a nanosphere array Jonathan Grandidier Michael G. Deceglie Dennis M. Callahan Harry A. Atwater #12;Simulations of solar cell for enhancing the absorption of thin-film amorphous silicon solar cells using periodic arrangements of resonant

Grandidier, Jonathan

450

Solar Cells DOI: 10.1002/anie.200904492  

E-Print Network [OSTI]

* Renewable and green energy are the technological drivers of the future economy. Solar cells (SCs) are one-sensitized solar cells (DSSCs) that have a significantly enhanced energy conversion efficiency. The ZnO NWs grow. This research demonstrates a new approach from 2D to 3D solar cells with advantages of high efficiency, expanded

Wang, Zhong L.

451

Light Trapping in Solar Cells Using Resonant Nanostructures P. Spinelli  

E-Print Network [OSTI]

Light Trapping in Solar Cells Using Resonant Nanostructures P. Spinelli #12;Summary Photovoltaics solar cell is reduced, due to incomplete absorption of light. In this thesis, we investigate new ways of enhancing light absorption in Si solar cells by using nanostructures that show resonant interaction

van Rooij, Robert

452

Solar cell efficiency enhancement via light trapping in printable resonant  

E-Print Network [OSTI]

Solar cell efficiency enhancement via light trapping in printable resonant dielectric nanosphere for addressing the key challenge of light trapping in thin-film solar cells. We experimentally and theoretically the absorber, junction, and passivation layers. Recently, a number of innovative solar cell light

Atwater, Harry

453

Plasmonic Nanostructure Design for Efficient Light Coupling into Solar Cells  

E-Print Network [OSTI]

Plasmonic Nanostructure Design for Efficient Light Coupling into Solar Cells Vivian E. Ferry, Luke in thin film solar cells. In particular, the ability of plasmonic structures to localize light sunlight into guided modes in thin film Si and GaAs plasmonic solar cells whose back interface is coated

Atwater, Harry

454

Solar cell efficiency enhancement via light trapping in printable resonant  

E-Print Network [OSTI]

Solar cell efficiency enhancement via light trapping in printable resonant dielectric nanosphere for addressing the key challenge of light trapping in thin-film solar cells. We experimentally and theoretically, photovoltaics, resonant dielectric structures, solar cells * Corresponding author: e-mail jgrandid

Grandidier, Jonathan

455

Lead selenide nanowire solar cells via LPNE and its new found derivatives  

E-Print Network [OSTI]

type of solar cell in this third generation technology thatgeneration solar technology based on thick silicon cells,

Hujdic, Justin

2012-01-01T23:59:59.000Z

456

Modeling and control of thin film surface morphology: application to thin film solar cells  

E-Print Network [OSTI]

materials, thin film solar cell technology stands to benefitThin-film solar cells: Review of materials, technologies and

Huang, Jianqiao

2012-01-01T23:59:59.000Z

457

Achieving High Performance Polymer Tandem Solar Cells via Novel Materials Design  

E-Print Network [OSTI]

polymer solar cell could be a viable technology for spacetechnology must utilize the uniqueness of polymer solar cells.

Dou, Letian

2014-01-01T23:59:59.000Z

458

Method of fabricating a solar cell with a tunnel dielectric layer  

DOE Patents [OSTI]

Methods of fabricating solar cells with tunnel dielectric layers are described. Solar cells with tunnel dielectric layers are also described.

Dennis, Tim; Harrington, Scott; Manning, Jane; Smith, David; Waldhauer, Ann

2012-12-18T23:59:59.000Z

459

Method of fabricating a solar cell with a tunnel dielectric layer  

DOE Patents [OSTI]

Methods of fabricating solar cells with tunnel dielectric layers are described. Solar cells with tunnel dielectric layers are also described.

Dennis, Tim; Harrington, Scott; Manning, Jane; Smith, David D; Waldhauer, Ann

2014-04-29T23:59:59.000Z

460

Effects of Mg composition on open circuit voltage of Cu2OMgxZn1xO heterojunction solar cells  

E-Print Network [OSTI]

(ZnO) Cuprous oxide (Cu2O) Solar cells Electrodeposition MOCVD (metal-organic chemical vapor solar cells, where Ag and FTO are used as top and bottom electrodes, respectively. An enhancement on the MgxZn1�xO (x¼10%) based solar cell. & 2011 Elsevier B.V. All rights reserved. 1. Introduction Zn

Garfunkel, Eric

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Kelvin Probe Force Microscopic Imaging of the Energy Barrier and Energetically Favorable Offset of Interfaces in Double-Junction Organic Solar Cells  

Science Journals Connector (OSTI)

Organic photovoltaics (OPVs) have potential as a low-cost renewable energy source. ... This work benefited from the U.S.–Egypt Joint Program, NSF CAREER Program (ECCS-0950731), NSF/EPSCoR program (Grant 0903804), and SD BoR Competitive Research Grant Program (CRGP). ...

Mahbube K. Siddiki; Swaminathan Venkatesan; David Galipeau; Qiquan Qiao

2013-01-04T23:59:59.000Z

462

Hafnium nitride for hot carrier solar cells  

Science Journals Connector (OSTI)

Abstract Hot carrier solar cells is an attractive technology with the potential of reaching high energy conversion efficiencies approaching the thermodynamic limit of infinitely stacked multi-junction solar cells: 65% under one sun and 86% under maximally concentrated. The hot carrier solar cell is conceptually simple consisting of two key components: absorber and energy selective contacts. High efficiencies are achieved by minimising the energy lost to thermalisaton of hot photo-generated carriers while absorbing majority of the solar spectrum. For this to be achieved, energy selective contacts are required to allow the extraction of carriers fast enough at an energy level above the electronic band edge. It is critical for the absorber to be able to maintain a hot carrier population for a sufficiently long time period for the extraction of carriers while they are ‘hot’. Bulk materials with a large gap between acoustic and optical branches in the phonon dispersion are predicted to exhibit slow hot carrier thermalisation rates. Hafnium nitride is such a material with a large gap in its phonon dispersion and is identified as a potential material to be used as a hot carrier absorber. Hafnium nitride has been deposited using reactive sputtering and characterised to investigate material properties and carrier cooling rates.

Simon Chung; Santosh Shrestha; Xiaoming Wen; Yu Feng; Neeti Gupta; Hongze Xia; Pyng Yu; Jau Tang; Gavin Conibeer

2014-01-01T23:59:59.000Z

463

27. 5-percent silicon concentrator solar cells  

SciTech Connect (OSTI)

Recent advances in silicon solar cells using the backside point-contact configuration have been extended resulting in 27.5-percent efficiencies at 10 W/sq cm (100 suns, 24 C), making these the most efficient solar cells reported to date. The one-sun efficiencies under an AM1.5 spectrum normalized to 100 mW/sq cm are 22 percent at 24 C based on the design area of the concentrator cell. The improvements reported here are largely due to the incorportation of optical light trapping to enhance the absorption of weakly absorbed near bandgap light. These results approach the projected efficiencies for a mature technology which are 23-24 percent at one sun and 29 percent in the 100-350-sun (10-35 W/sq cm) range. 10 references.

Sinton, R.A.; Kwark, Y.; Gan, J.Y.; Swanson, R.M.

1986-10-01T23:59:59.000Z

464

Efficient indium-tin-oxide free inverted organic solar cells based on aluminum-doped zinc oxide cathode and low-temperature aqueous solution processed zinc oxide electron extraction layer  

SciTech Connect (OSTI)

Indium-tin-oxide (ITO) free inverted organic solar cells (IOSCs) based on aluminum-doped zinc oxide (AZO) cathode, low-temperature aqueous solution processed zinc oxide (ZnO) electron extraction layer, and poly(3-hexylthiophene-2, 5-diyl):[6, 6]-phenyl C{sub 61} butyric acid methyl ester blend were realized in this work. The resulted IOSC with ZnO annealed at 150?°C shows the superior power conversion efficiency (PCE) of 3.01%, if decreasing the ZnO annealing temperature to 100?°C, the obtained IOSC also shows a PCE of 2.76%, and no light soaking issue is observed. It is found that this ZnO film not only acts as an effective buffer layer but also slightly improves the optical transmittance of AZO substrates. Further, despite the relatively inferior air-stability, these un-encapsulated AZO/ZnO IOSCs show comparable PCEs to the referenced ITO/ZnO IOSCs, which demonstrates that the AZO cathode is a potential alternative to ITO in IOSCs. Meanwhile, this simple ZnO process is compatible with large area deposition and plastic substrates, and is promising to be widely used in IOSCs and other relative fields.

Chen, Dazheng; Zhang, Chunfu, E-mail: cfzhang@xidian.edu.cn; Wang, Zhizhe; Zhang, Jincheng; Tang, Shi; Wei, Wei; Sun, Li; Hao, Yue, E-mail: yhao@xidian.edu.cn [State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, School of Microelectronics, Xidian University, No. 2 South Taibai Road, Xi'an 710071 (China)

2014-06-16T23:59:59.000Z

465

E-Print Network 3.0 - area solar cells Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

<< < 1 2 3 4 5 > >> 1 24th European Photovoltaic Solar Energy Conference, Hamburg, Germany, Sept. 2009 THE BURIED EMITTER SOLAR CELL CONCEPT Summary: back contacted solar cell...

466

Absorption-Enhanced Organic Photovoltaic By Incorporating Metallic Nano Pyramid Particles  

E-Print Network [OSTI]

Device Physics of Organic Solar Cells," 2011/12/21/ 2011. S.photogeneration in organic solar cells," Chemical reviews,for High Performance Inverted Organic Solar Cells," Advanced

Qasem, Hussamaldeen S.

2014-01-01T23:59:59.000Z

467

Synthesis of CdSe quantum dots for quantum dot sensitized solar cell  

SciTech Connect (OSTI)

CdSe Quantum Dots (QDs) of size 0.85 nm were synthesized using chemical route. ZnO based Quantum Dot Sensitized Solar Cell (QDSSC) was fabricated using CdSe QDs as sensitizer. The Pre-synthesized QDs were found to be successfully adsorbed on front ZnO electrode and had potential to replace organic dyes in Dye Sensitized Solar Cells (DSSCs). The efficiency of QDSSC was obtained to be 2.06 % at AM 1.5.

Singh, Neetu, E-mail: singh.neetu1985@gmail.com; Kapoor, Avinashi [Department of Electronic Science, University of Delhi South Campus, New Delhi-110 021 (India); Kumar, Vinod [Department of Physics, University of the Free State, Bloemfontein, ZA9300 (South Africa); Mehra, R. M. [School of Engineering and Technology, Sharda University, Greater Noida-201 306, U.P. (India)

2014-04-24T23:59:59.000Z

468

Solar Energy Materials & Solar Cells 71 (2002) 261271 Photoelectric behavior of nanocrystalline TiO2  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 71 (2002) 261­271 Photoelectric behavior of nanocrystalline Ti 100101, People's Republic of China e Synchrotron Radiation Laboratory at Institute of High Energy Physics. A sandwich-type solar cell fabricated by this dye-sensitized nanocrystalline TiO2 film generated 6:1 mA cm�2

Huang, Yanyi

469

Green Solar In 2009 researchers at Berkeley helped shift research into new solar cell materials by  

E-Print Network [OSTI]

Green Solar In 2009 researchers at Berkeley helped shift research into new solar cell materials also be considered. This project would examine the proposed solar cell materials and designs and create­2077). Given the proposed scales of PV adoption, the health and environmental impacts of PV technology should

Iglesia, Enrique

470

Solar Energy Materials & Solar Cells 75 (2003) 307312 Extreme radiation hardness and light-weighted  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 75 (2003) 307­312 Extreme radiation hardness and light annealing and minority-carrier injection-enhanced annealing are responsible for the recovery of photovoltaic of InP solar cells with much higher radiation resistance, conversion efficiency and power/weight ratio

Woodall, Jerry M.

471

Fabrication and Characterization of Organic/Inorganic Photovoltaic Devices  

E-Print Network [OSTI]

called ‘thin-film’ solar cell technology was first made byOrganic solar cells are a relatively novel technology, yettechnology development: A perspective from patent growth analysis, Solar Energy Materials and Solar Cells

Guvenc, Ali Bilge

2012-01-01T23:59:59.000Z

472

Influence of the Position of the Side Chain on Crystallization and Solar Cell Performance of DPP-Based Small Molecules  

Science Journals Connector (OSTI)

Three isomeric ?-conjugated molecules based on diketopyrrolopyrrole and bithiophene (DPP2T) substituted with hexyl side chains in different positions are investigated for use in solution-processed organic solar cells. ... Solution-processed organic photovoltaic cells are considered to be a viable option in meeting the future global energy demand when high efficiencies can be combined with fast printing production techniques. ... solar cell based on merocyanine dyes - traditional colorants that can easily be mass-produced and purified - is presented. ...

Veronique S. Gevaerts; Eva M. Herzig; Mindaugas Kirkus; Koen H. Hendriks; Martijn M. Wienk; Jan Perlich; Peter Müller-Buschbaum; René A. J. Janssen

2013-12-12T23:59:59.000Z

473

WORKING QUANTUM EFFICIENCY OF CDTE SOLAR CELL Zimeng Cheng  

E-Print Network [OSTI]

in -Si thin film solar cells because there are more defects and surface effects. Figure 1. The diode darkWORKING QUANTUM EFFICIENCY OF CDTE SOLAR CELL Zimeng Cheng 1 , Kwok Lo 2 , Jingong Pan 1 , Dongguo Chen 1 , Tao Zhou 2 , Qi Wang 3 , George E. Georgiou 1 , Ken K. Chin 1 1 Apollo CdTe Solar Energy

474

Controlling the Texture and Crystallinity of Evaporated Lead Phthalocyanine Thin Films for Near-Infrared Sensitive Solar Cells  

E-Print Network [OSTI]

Controlling the Texture and Crystallinity of Evaporated Lead Phthalocyanine Thin Films for Near-Infrared Sensitive Solar Cells Karolien Vasseur,, Katharina Broch,§ Alexander L. Ayzner, Barry P. Rand, David Cheyns: To achieve organic solar cells with a broadened spectral absorption, we aim to promote the growth of the near

Schreiber, Frank

475

PHOTOVOLTAIC PROPERTIES OF METAL-MEROCYANINE-TiO2 SANDWICH CELLS  

E-Print Network [OSTI]

known in inorganic solar cell technology. but this approachin inorganic solar cell technology. For organic sys- tems,

Skotheim, Terje Asbjorn

2011-01-01T23:59:59.000Z

476

Innotech Solar AS formerly known as Solar Cell Repower | Open Energy  

Open Energy Info (EERE)

Innotech Solar AS formerly known as Solar Cell Repower Innotech Solar AS formerly known as Solar Cell Repower Jump to: navigation, search Name Innotech Solar AS (formerly known as Solar Cell Repower) Place Narvik, Norway Zip 8512 Sector Solar Product Norway-based developer of repowering technologies for solar cells. Coordinates 68.439515°, 17.43015° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":68.439515,"lon":17.43015,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

477

Solar Energy Materials & Solar Cells 71 (2002) 511522 In situ Raman spectroscopy of the  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 71 (2002) 511­522 In situ Raman spectroscopy. In this situation, a low energy excitation (e.g. visible light) is needed to excite an electron to a neighboring

Nabben, Reinhard

478

Thermal behaviour of new crystalline semitransparent solar cell structure  

Science Journals Connector (OSTI)

This paper presents the structure of a novel semitransparent solar cell and its thermal behaviour, which cell can be used for building integrated applications. The crystalline self-made test cells can be manufactured using basic semiconductor technological ... Keywords: Building integrated photovoltaics, Semitransparent solar cell and thermal characteristics

Enik Bándy; Márta Rencz,

2013-11-01T23:59:59.000Z

479

CVD amorphous silicon solar cells  

SciTech Connect (OSTI)

Development of all-CVD TCO/p-i-n/metal/substrate a-Si devices made by CVD from disilane is reported. The reactor and conditions for depositing device quality CVD a-Si at growth rates up to 10 A/sec are described. Conductivity, optical properties and density of states of CVD i layers are described. Photovoltaic device characteristics of all - CVD and hybrid (CVD/GD) pin and nip devices are compared. Efficiencies up to 4% were achieved. An analysis of collection efficiency indicates a hole ..mu../tau/ of 1 - 4 X 10/sup -9/ cm/sup 2//V. Cell performance is consistent with a series connected double junction model.

Hegedus, S.S.; Baron, B.N.; Rocheleau, R.E.

1984-05-01T23:59:59.000Z

480

High-efficiency third-generation silicon solar cells  

Science Journals Connector (OSTI)

The results of investigating third-generation matrix silicon solar cells with an efficiency of more than 25% during conversion of concentrated solar radiation are given. Electrical and optical characteristics ......

D. S. Strebkov; V. I. Polyakov

2011-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic solar cell" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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481

A High Efficiency Silicon Solar Cell Production Technology  

Science Journals Connector (OSTI)

BP Solar have developed a cost-effective production technology for the manufacture of high efficiency laser grooved buried grid (LGBG) crystalline silicon solar cells. The process has demonstrated 17–18% ... a ne...

N. B. Mason; D. Jordan; J. G. Summers

1991-01-01T23:59:59.000Z

482

Multijunction solar cells for conversion of concentrated sunlight to electricity  

Science Journals Connector (OSTI)

Solar-cell efficiencies have exceeded 40% in recent years. The keys to achieving these high efficiencies include: 1) use of multiple materials that span the solar spectrum, 2) growth...

Kurtz, Sarah; Geisz, John

2010-01-01T23:59:59.000Z

483

Light harvesting enhancement in solar cells with quasicrystalline plasmonic structures  

Science Journals Connector (OSTI)

Solar cells are important in the area of renewable energies. Since it is expensive to produce solar-grade silicon [Electrochem. Soc. Interface 17, 30 (2008)], especially thin-film...

Bauer, Christina; Giessen, Harald

2013-01-01T23:59:59.000Z

484

Utilization of Direct and Diffuse Sunlight in a Dye-Sensitized Solar Cell — Silicon Photovoltaic Hybrid Concentrator System  

Science Journals Connector (OSTI)

Nanocrystalline dye-sensitized solar cells (DSSCs) and organic photovoltaics (OPV) are two families of low-cost solar devices that absorb light in the visible part of the spectrum. ... del Cueto, J. A.Comparison of Energy Production and Performance from Flat-Plate Photovoltaic Module Technologies Deployed at Fixed Tilt. ... dye-sensitized solar cell as a top cell for high-energy photons, and a Cu In Ga selenide thin-film bottom cell for lower-energy photons, produces AM 1.5 solar to elec. ...

Greg D. Barber; Paul G. Hoertz; Seung-Hyun Anna Lee; Neal M. Abrams; Janine Mikulca; Thomas E. Mallouk; Paul Liska; Shaik M. Zakeeruddin; Michael Grätzel; Anita Ho-Baillie; Martin A. Green

2011-02-28T23:59:59.000Z

485

Semitransparent ultrathin CdTe solar cells Semitransparent ultrathin CdTe solar cells and durabilityand durability  

E-Print Network [OSTI]

Semitransparent ultrathin CdTe solar cells Semitransparent ultrathin CdTe solar cells core technology is built around · sputter deposition · CdS/CdTe cell structure · Extensive IPTe cellsultrathin CdTe cells X26 stateoftheart compared with other CdTe deposition: [X26 technology has been

Rollins, Andrew M.

486

'Nano'tubes, Surface Area & NanoSolar Cells  

K-12 Energy Lesson Plans and Activities Web site (EERE)

This unit takes students through several introductory lessons designed to gain a better understanding of the 'nano' scale as it relates to the creation of a (dye-sensitized) solar cell (DSSC). The introductory lessons guide students through activities covering volume, surface area and density and exploration of the relationship between these factors. The unit culminates with students building a Gratzel cell, a solar cell employing a layer of nanospheres of TiO2 as the semiconductor and blackberry juice as the light absorber in a non-Si-based solar cell. Students are able to build a small solar cell and test its efficiency.

487

Solar module having reflector between cells  

DOE Patents [OSTI]

A photovoltaic module comprising an array of electrically interconnected photovoltaic cells disposed in a planar and mutually spaced relationship between a light-transparent front cover member in sheet form and a back sheet structure is provided with a novel light-reflecting means disposed between adjacent cells for reflecting light falling in the areas between cells back toward said transparent cover member for further internal reflection onto the solar cells. The light-reflecting comprises a flexible plastic film that has been embossed so as to have a plurality of small V-shaped grooves in its front surface, and a thin light-reflecting coating on said front surface, the portions of said coating along the sides of said grooves forming light-reflecting facets, said grooves being formed so that said facets will reflect light impinging thereon back into said transparent cover sheet with an angle of incidence greater than the critical angle, whereby substantially all of the reflected light will be internally reflected from said cover sheet back to said solar modules, thereby increasing the current output of the module.

Kardauskas, Michael J. (Billerica, MA)

1999-01-01T23:59:59.000Z

488

Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell  

Office of Energy Efficiency and Renewable Energy (EERE)

EERE supported the development of Solar Junction's concentrated photovoltaic technology that set a world record for conversion efficiency.

489

Computational Modeling of Plasmon-Enhanced Light Absorption in a Multicomponent Dye Sensitized Solar Cell  

Science Journals Connector (OSTI)

Argonne-Northwestern Solar Energy Research Center Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States ... Fortunately, both the economical and the environmental issues associated with semiconductor based solar cells can be mitigated by using dye-sensitized solar cells (DSSCs),(4) which use organic dye molecules coated on TiO2 particles as the photoactive component to reduce fabrication expenses and eliminate expensive and toxic ingredients. ... for a given incident wavelength by combining this Hamiltonian coupling with free energy changes and ground state reorganization energies that are obtained using an implicit solvation simulation, physicochem. ...

Hanning Chen; Martin G. Blaber; Stacey D. Standridge; Erica J. DeMarco; Joseph T. Hupp; Mark A. Ratner; George C. Schatz

2012-04-11T23:59:59.000Z

490

Pokeberries Provide Boost for Solar Cells | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Pokeberries Provide Boost for Solar Cells Pokeberries Provide Boost for Solar Cells Pokeberries Provide Boost for Solar Cells May 20, 2010 - 2:41pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? When the red dye from the pokeberries is spread over solar cells, it acts as a light absorber, boosting the technology's efficiency by about seven percent. The dye helps the cell's fibers capture more sunlight to convert into power. A weed Civil War soldiers used to write letters home may hold the secret to cheaper and more efficient solar energy today. Researchers at Wake Forest University's Center for Nanotechnology and Molecular Materials in North Carolina have discovered that red dye from the pokeberry weed makes their low-cost, fiber-based solar cells even more

491

Solare Cell Roof Tile And Method Of Forming Same  

DOE Patents [OSTI]

A solar cell roof tile includes a front support layer, a transparent encapsulant layer, a plurality of interconnected solar cells and a backskin layer. The front support layer is formed of light transmitting material and has first and second surfaces. The transparent encapsulant layer is disposed adjacent the second surface of the front support layer. The interconnected solar cells has a first surface disposed adjacent the transparent encapsulant layer. The backskin layer has a first surface disposed adjacent a second surface of the interconnected solar cells, wherein a portion of the backskin layer wraps around and contacts the first surface of the front support layer to form the border region. A portion of the border region has an extended width. The solar cell roof tile may have stand-offs disposed on the extended width border region for providing vertical spacing with respect to an adjacent solar cell roof tile.

Hanoka, Jack I. (Brookline, MA); Real, Markus (Oberberg, CH)

1999-11-16T23:59:59.000Z

492

Accounting for Localized Defects in the Optoelectronic Design of Thin-Film Solar Cells  

E-Print Network [OSTI]

Thin-film silicon solar cell technology," Progress insolar cells: modeling, materials and device technology.technologies competitive with traditional wafer based solar cells,

Deceglie, Michael G.

2014-01-01T23:59:59.000Z

493

Investigation of the Role of Trap States in Solar Cell Reliability using Photothermal Deflection Spectroscopy  

E-Print Network [OSTI]

of degradation of solar cells, since a material structure,higher effect on the solar cell’s stability and performance.en.wikipedia.org/wiki/Solar_cell_efficiency, accessed 10) J.

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

494

Electrochemical Investigation of a Microbial Solar Cell Reveals a Nonphotosynthetic Biocathode Catalyst  

Science Journals Connector (OSTI)

...Electrochemical Investigation of a Microbial Solar Cell Reveals a Nonphotosynthetic Biocathode...Jose, California, USA c Microbial solar cells (MSCs) are microbial fuel cells...been hypothesized that microbial solar cells (MSCs) can continuously generate...

Sarah M. Strycharz-Glaven; Richard H. Glaven; Zheng Wang; Jing Zhou; Gary J. Vora; Leonard M. Tender

2013-04-19T23:59:59.000Z

495

Elongated nanostructures for radial junction solar cells  

Science Journals Connector (OSTI)

In solar cell technology, the current trend is to thin down the active absorber layer. The main advantage of a thinner absorber is primarily the reduced consumption of material and energy during production. For thin film silicon (Si) technology, thinning down the absorber layer is of particular interest since both the device throughput of vacuum deposition systems and the stability of the devices are significantly enhanced. These features lead to lower cost per installed watt peak for solar cells, provided that the (stabilized) efficiency is the same as for thicker devices. However, merely thinning down inevitably leads to a reduced light absorption. Therefore, advanced light trapping schemes are crucial to increase the light path length. The use of elongated nanostructures is a promising method for advanced light trapping. The enhanced optical performance originates from orthogonalization of the light's travel path with respect to the direction of carrier collection due to the radial junction, an improved anti-reflection effect thanks to the three-dimensional geometric configuration and the multiple scattering between individual nanostructures. These advantages potentially allow for high efficiency at a significantly reduced quantity and even at a reduced material quality, of the semiconductor material. In this article, several types of elongated nanostructures with the high potential to improve the device performance are reviewed. First, we briefly introduce the conventional solar cells with emphasis on thin film technology, following the most commonly used fabrication techniques for creating nanostructures with a high aspect ratio. Subsequently, several representative applications of elongated nanostructures, such as Si nanowires in realistic photovoltaic (PV) devices, are reviewed. Finally, the scientific challenges and an outlook for nanostructured PV devices are presented.

Yinghuan Kuang; Marcel Di Vece; Jatindra K Rath; Lourens van Dijk; Ruud E I Schropp

2013-01-01T23:59:59.000Z

496

Electron Microscopical Investigations of Organic Solar Cells.  

E-Print Network [OSTI]

??Diese Arbeit behandelt die Analyse der Nanomorphologie von organischen Solarzellen, welchen einen großen Einfluss auf die Effizienz der Zelle hat. Ein breites Spektrum elektronenmikroskopischer Techniken… (more)

Pfaff, Marina

2013-01-01T23:59:59.000Z

497

Solar Energy Materials & Solar Cells 77 (2003) 319330 Structure and photoelectrochemical properties  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 77 (2003) 319­330 Letters Structure and photoelectrochemical a promis- ing strategy for solar energy conversion, with energy conversion efficiency as high monochromatic photon to current conversion efficiency, overall energy conversion yield (Z) and transient

Huang, Yanyi

498

Method of fabricating bifacial tandem solar cells  

DOE Patents [OSTI]

A method of fabricating on a semiconductor substrate bifacial tandem solar cells with semiconductor subcells having a lower bandgap than the substrate bandgap on one side of the substrate and with subcells having a higher bandgap than the substrate on the other including, first, growing a lower bandgap subcell on one substrate side that uses only the same periodic table group V material in the dislocation-reducing grading layers and bottom subcells as is present in the substrate and after the initial growth is complete and then flipping the substrate and growing the higher bandgap subcells on the opposite substrate side which can be of different group V material.

Wojtczuk, Steven J; Chiu, Philip T; Zhang, Xuebing; Gagnon, Edward; Timmons, Michael

2014-10-07T23:59:59.000Z

499

Computational Challenges for Nanostructure Solar Cells Project at NERSC  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Challenges for Challenges for Nanostructure Solar Cells Computational Challenges for Nanostructure Solar Cells ZZ2.jpg Key Challenges: Current nanostructure solar cells often have energy efficiencies well below that of traditional solar cells. To understand why, one must understand the complete photoelectron dynamics in a nanostructure - the photon absorption, exciton generation, exciton dissociation, carrier transport and carrier collection. However, the large number of surface states, the strong exciton binding energies, the nano-interfaces, the lack of doping, and the possibility of unintended internal electric fields make this a daunting task that requires a suite of techniques and computer codes offering different electronic structure methods and varying levels of

500

Dielectric microconcentrators for efficiency enhancement in concentrator solar cells  

Science Journals Connector (OSTI)

Metal fingers typically cover more than 10% of the active area of concentrator solar cells. Microfabricated dielectric optical designs that can completely eliminate front contact...

Korech, Omer; Gordon, Jeffrey M; Katz, Eugene A; Feuermann, Daniel; Eisenberg, Naftali

2007-01-01T23:59:59.000Z