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1

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 -...

2

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

3

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

4

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...

5

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)

6

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

7

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

8

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

9

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

10

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

11

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

12

Hierarchically Structured ZnO Nanorods-Nanosheets for Improved Quantum-Dot-Sensitized Solar Cells  

E-Print Network [OSTI]

). This hierarchical structure had two advantages in improving the power conversion efficiency (PCE) of the solar cells. INTRODUCTION The establishment of low-cost and high-performance solar cells for sustainable energy sourcesHierarchically Structured ZnO Nanorods-Nanosheets for Improved Quantum-Dot-Sensitized Solar Cells

Cao, Guozhong

13

Efficiency improvement of silicon nanostructure-based solar cells  

Science Journals Connector (OSTI)

Solar cells based on a high-efficiency silicon nanostructure (SNS) were developed using a two-step metal-assisted electroless etching (MAEE) technique, phosphorus silicate glass (PSG) doping and screen printing. This process was used to produce solar cells with a silver nitrate (AgNO3) etching solution in different concentrations. Compared to cells produced using the single MAEE technique, SNS-based solar cells produced with the two-step MAEE technique showed an increase in silicon surface coverage of ~181.1% and a decrease in reflectivity of ~144.3%. The performance of the SNS-based solar cells was found to be optimized (~11.86%) in an SNS with a length of ~300 nm, an aspect ratio of ~5, surface coverage of ~84.9% and a reflectivity of ~6.1%. The ~16.8% increase in power conversion efficiency (PCE) for the SNS-based solar cell indicates good potential for mass production.

Bohr-Ran Huang; Ying-Kan Yang; Wen-Luh Yang

2014-01-01T23:59:59.000Z

14

Air-Stable High-Efficiency Solar Cells Using Improved Single-Walled Carbon Nanotube Films  

E-Print Network [OSTI]

1 Air-Stable High-Efficiency Solar Cells Using Improved Single-Walled Carbon Nanotube Films Kehang-3-5800-6983. #12;2 ABSTRACT We present the single-walled carbon nanotube/silicon (SWNT/Si) solar cells approaching, the PCEs of the fabricated solar cells slightly increased after six-month exposure in air without any

Maruyama, Shigeo

15

Negative refractive index materials for improved solar cells  

Science Journals Connector (OSTI)

Planar thin-film solar cells can exploit Fabry-Perot resonances in the spectral domain of weak absorption to make them more efficient. However, their spectral width decreases and their number increases for a thicker solar cell, both being detrimental. Here, we show that an optically complementary material, i.e., a material with a negative but otherwise identical refractive index to that of the solar cell material and with the same impedance, allows a single, spectrally immensely broad, Fabry-Perot resonance to be obtained. This is useful to enhance the absorption across the entire spectral domain of interest. If a material with the required optical response were available, a solar cell could be implemented that performs close to the Lambertian limit. However, since the idealistic material properties assumed herein cannot be achieved, an actual implementation may exploit nanostructures such as, e.g., dispersion engineered photonic crystals. In a reasonable spectral range their optical response can be close to that required.

Stephan Fahr; Carsten Rockstuhl; Falk Lederer

2013-09-03T23:59:59.000Z

16

Manipulating Light to Understand and Improve Solar Cells (494th Brookhaven Lecture)  

SciTech Connect (OSTI)

Energy consumption around the world is projected to approximately triple by the end of the century, according to the 2005 Report from the U.S. Department of Energy's Basic Energy Sciences Workshop on Solar Energy Utilization. Much will change in those next 86 years, but for all the power the world needs—for everything from manufacturing and transportation to air conditioning and charging cell phone batteries—improved solar cells will be crucial to meet this future energy demand with renewable energy sources. At Brookhaven Lab, scientists are probing solar cells and exploring variations within the cells—variations that are so small they are measured in billionths of a meter—in order to make increasingly efficient solar cells and ultimately help reduce the overall costs of deploying solar power plants. Dr. Eisaman will discuss DOE's Sunshot Initiative, which aims to reduce the cost of solar cell-generated electricity by 2020. He will also discuss how he and collaborators at Brookhaven Lab are probing different material compositions within solar cells, measuring how efficiently they collect electrical charge, helping to develop a new class of solar cells, and improving solar-cell manufacturing processes.

Eisaman, Matthew [BNL, Sustainable Energy Technologies Department

2014-04-16T23:59:59.000Z

17

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

18

Processing Additives for Improved Efficiency from Bulk Heterojunction Solar Cells  

Science Journals Connector (OSTI)

Add to ACS ChemWorx ... Herein, we clarify the mechanism by which processing additives control the morphology, and using the insight provided by the mechanism, we identify an entire class of processing additives which yields still higher efficiency solar cells than those fabricated with 1,8-octanedithiol as the processing additive. ... AFM images of the BHJ films processed with the additive exhibit larger interconnected regions of PCPDTBT and larger porous domains (the C71-PCBM regions prior to selective removal) compared with images of the BHJ film cast without using the processing additive. ...

Jae Kwan Lee; Wan Li Ma; Christoph J. Brabec; Jonathan Yuen; Ji Sun Moon; Jin Young Kim; Kwanghee Lee; Guillermo C. Bazan; Alan J. Heeger

2008-02-21T23:59:59.000Z

19

Recent improvements in materials for thin GaAs and multibandgap solar cells  

SciTech Connect (OSTI)

The High Efficiency Concepts Program at SERI supports research on III-V compound semiconductors with the objective of achieving the maximum attainable photovoltaic conversion efficiencies for terrestrial solar electric power. The outcome of this research may also affect the future of space photovoltaic cells. While the interest in thin-film, high-efficiency solar cells for terrestrial applications is driven principally by consideration of system costs, such cells would also improve the power density of space power arrays.

Benner, J.P.

1985-05-01T23:59:59.000Z

20

Improved amorphous silicon alloy solar cells for module fabrication  

SciTech Connect (OSTI)

An initial conversion efficiency of 13.5% has been obtained on a triple-junction triple-bandgap device fabricated in a large-area deposition reactor capable of producing one-square-foot modules. The intrinsic layer of the top cell is a wide bandgap amorphous silicon alloy. The middle and bottom cells employ high quality amorphous silicon-germanium alloy. The high efficiency of the triple-junction cell is attributed to the relative reduction of the optical loss in the top tunnel junction and the improvement in the quality of the middle and bottom component cells. Triple-junction devices with initial efficiency of 13.3% have shown saturation at 11.6% after light soaking. Modules of aperture area 909 cm{sup 2} have been fabricated using an assembly process similar to the one being currently used in their manufacturing line. The module design consists of one large-area, high-current monolithic multijunction device. The status of the small-area devices and modules is described.

Banerjee, A.; Yang, J.; Guha, S.

1997-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "improved solar cells" 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

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

22

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

23

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

24

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

25

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...

26

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

27

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

28

New Fabrication Method Improves the Efficiency and Economics of Solar Cells (Fact Sheet)  

SciTech Connect (OSTI)

Synthetic fabrication strategy optimizes the illumination geometry and transport properties of dye-sensitized solar cells. Using oriented titanium oxide (TiO{sub 2}) nanotube (NT) arrays has shown promise for dye-sensitized solar cells (DSSCs). High solar conversion efficiency requires that the incident light enters the cell from the photoelectrode side. However, for NT-based DSSCs, the light normally enters the cell through the counter electrode because a nontransparent titanium foil is typically used as the substrate for forming the aligned NTs and for making electrical contact with them. It has been synthetically challenging to prepare transparent TiO{sub 2} NT electrodes by directly anodizing Ti metal films on transparent conducting oxide (TCO) substrates because it is difficult to control the synthetic conditions. National Renewable Energy Laboratory (NREL) researchers have developed a general synthetic strategy for fabricating transparent TiO{sub 2} NT films on TCO substrates. With the aid of a conducting Nb-doped TiO{sub 2} (NTO) layer between the Ti film and TCO substrate, the Ti film can be anodized completely without degrading the TCO. The NTO layer protects the TCO from degradation through a self-terminating mechanism by arresting the electric field-assisted dissolution process at the NT-NTO interface. NREL researchers found that the illumination direction and wavelength of the light incident on the DSSCs strongly influenced the incident photon-to-current conversion efficiency, light-harvesting, and charge-collection properties, which, in turn, affect the photocurrent density, photovoltage, and solar energy conversion efficiency. Researchers also examined the effects of NT film thickness on the properties and performance of DSSCs and found that illuminating the cell from the photoelectrode side substantially increased the conversion efficiency compared with illuminating it from the counter-electrode side. This method solves a key challenge in fabricating NT-based DSSCs and determines an optimal illumination direction to use in these cells. The synthetic fabrication strategy will improve the economics and conversion efficiency of DSSCs.

Not Available

2012-07-01T23:59:59.000Z

29

Solar cell modules with improved backskin and methods for forming same  

DOE Patents [OSTI]

A laminated solar cell module with a backskin layer that reduces the materials and labor required during the manufacturing process. The solar cell module includes a rigid front support layer formed of light transmitting material having first and second surfaces. A transparent encapsulant layer has a first surface disposed adjacent the second surface of the front support layer. A plurality of interconnected solar cells have a first surface disposed adjacent a second surface of the transparent encapsulant layer. The backskin layer is formed of a thermoplastic olefin, which includes first ionomer, a second ionomer, glass fiber, and carbon black. A first surface of the backskin layer is disposed adjacent a second surface of the interconnected solar cells. The transparent encapsulant layer and the backskin layer, in combination, encapsulate the interconnected solar cells. An end portion of the backskin layer can be wrapped around the edge of the module for contacting the first surface of the front support layer to form an edge seal. A laminated solar cell module with a backskin layer that reduces the materials and labor required during the manufacturing process. The solar cell module includes a rigid front support layer formed of light transmitting material having first and second surfaces. A transparent encapsulant layer has a first surface disposed adjacent the second surface of the front support layer. A plurality of interconnected solar cells have a first surface disposed adjacent a second surface of the transparent encapsulant layer. The backskin layer is formed of a thermoplastic olefin, which includes first ionomer, a second ionomer, glass fiber, and carbon black. A first surface of the backskin layer is disposed adjacent a second surface of the interconnected solar cells. The transparent encapsulant layer and the backskin layer, in combination, encapsulate the interconnected solar cells. An end portion of the backskin layer can be wrapped around the edge of the module for contacting the first surface of the front support layer to form an edge seal.

Hanoka, Jack I. (Brookline, MA)

1998-04-21T23:59:59.000Z

30

Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance  

SciTech Connect (OSTI)

In this work, we demonstrate (1) a facile method to prepare Mn doped CdSe quantum dots (QDs) on Zn{sub 2}SnO{sub 4} photoanodes by pulsed laser deposition and (2) improved device performance of quantum dot sensitized solar cells of the Mn doped QDs (CdSe:Mn) compared to the undoped QDs (CdSe). The band diagram of photoanode Zn{sub 2}SnO{sub 4} and sensitizer CdSe:Mn QD is proposed based on the incident-photon-to-electron conversion efficiency (IPCE) data. Mn-modified band structure leads to absorption at longer wavelengths than the undoped CdSe QDs, which is due to the exchange splitting of the CdSe:Mn conduction band by the Mn dopant. Three-fold increase in the IPCE efficiency has also been observed for the Mn doped samples.

Dai, Qilin; Wang, Wenyong, E-mail: wwang5@uwyo.edu, E-mail: jtang2@uwyo.edu; Tang, Jinke, E-mail: wwang5@uwyo.edu, E-mail: jtang2@uwyo.edu [Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071 (United States); Sabio, Erwin M. [Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071 (United States)

2014-05-05T23:59:59.000Z

31

Understanding the Improved Stability of Hybrid Polymer Solar Cells Fabricated with Copper Electrodes  

Science Journals Connector (OSTI)

Hybrid polymer solar cells can become a commercial reality only if this degradation of photovolatic properties triggered by the dynamic changes taking place inside such devices in the absence of oxygen can be overcome. ...

B. Reeja-Jayan; Arumugam Manthiram

2011-03-30T23:59:59.000Z

32

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

33

Application of Vacancy Injection Gettering to Improve Efficiency of Solar Cells Produced by Millinet Solar: Cooperative Research and Development Final Report, CRADA Number CRD-10-417  

SciTech Connect (OSTI)

NREL will apply vacancy injection gettering (VIG) to Millinet solar cells and evaluate the performance improvement produced by this process step. The VIG will be done in conjunction with the formation of a back, Al-alloyed, contact. Millinet Solar will provide NREL with cells having AR coating on the front side and screen-printed Al on the backside, which will be processed in the NREL's optical furnace to perform simultaneous VIG and back contact alloying with deep BSF. These cells will be sent back to Millinet solar for a screen-printed front/side contact mask, followed by a second firing at NREL. Detailed analyses will be performed to determine improvements due to BSF and VIG.

Sopori, B.

2012-07-01T23:59:59.000Z

34

Improvement of pin-type amorphous silicon solar cell performance by employing double silicon-carbide p-layer structure  

E-Print Network [OSTI]

Improvement of pin-type amorphous silicon solar cell performance by employing double silicon-carbide Received 30 October 2003; accepted 18 November 2003 We investigated a double silicon-carbide p-layer structure consisting of a undiluted p-type amorphous silicon-carbide (p-a-SiC:H) window layer and a hydrogen

Kim, Yong Jung

35

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

36

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

37

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

38

Thin Metal Oxide Films to Modify a Window Layer in CdTe-Based Solar Cells for Improved Performance  

SciTech Connect (OSTI)

We report on CdS/CdTe photovoltaic devices that contain a thin Ta2O5 film deposited onto the CdS window layer by sputtering. We show that for thicknesses below 5 nm, Ta2O5 films between CdS and CdTe positively affect the solar cell performance, improving JSC, VOC, and the cell power conversion efficiency despite the insulating nature of the interlayer material. Using the Ta2O5 interlayer, a VOC gain of over 100 mV was demonstrated compared to a CdTe/CdS baseline. Application of a 1nm Ta2O5 interlayer enabled the fabrication of CdTe solar cells with extremely thin (less than 30 nm) CdS window layers. The efficiency of these cells exceeded that of a base line cell with 95 nm of CdS.

Lemmon, John P.; Polikarpov, Evgueni; Bennett, Wendy D.; Kovarik, Libor

2012-05-05T23:59:59.000Z

39

Improvement of CIGS thin-film solar cell performance by optimization of Zn(O,S) buffer layer parameters  

Science Journals Connector (OSTI)

The effects of Zn(O,S) buffer layer parameters on CuInGaSe (CIGS) cell performance are investigated using a physically based solar cell model. The key issue for CIGS solar cells is to remove destructive effec...

Samaneh Sharbati; Sayyed Hossein Keshmiri; J. Tyler McGoffin…

2014-10-01T23:59:59.000Z

40

California: TetraCell Silicon Solar Cell Improves Efficiency, Wins R&D 100 Award  

Office of Energy Efficiency and Renewable Energy (EERE)

TetraSun, in partnership with the National Renewable Energy Laboratory, developed a novel crystalline silicon photovoltaic (PV) cell architecture and manufacturing process that achieves efficiencies exceeding 21% with costs comparable to conventional crystalline PV cells.

Note: This page contains sample records for the topic "improved solar cells" 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

Disorder improves nanophotonic light trapping in thin-film solar cells  

SciTech Connect (OSTI)

We present a systematic experimental study on the impact of disorder in advanced nanophotonic light-trapping concepts of thin-film solar cells. Thin-film solar cells made of hydrogenated amorphous silicon were prepared on imprint-textured glass superstrates. For periodically textured superstrates of periods below 500?nm, the nanophotonic light-trapping effect is already superior to state-of-the-art randomly textured front contacts. The nanophotonic light-trapping effect can be associated to light coupling to leaky waveguide modes causing resonances in the external quantum efficiency of only a few nanometer widths for wavelengths longer than 500?nm. With increasing disorder of the nanotextured front contact, these resonances broaden and their relative altitude decreases. Moreover, overall the external quantum efficiency, i.e., the light-trapping effect, increases incrementally with increasing disorder. Thereby, our study is a systematic experimental proof that disorder is conceptually an advantage for nanophotonic light-trapping concepts employing grating couplers in thin-film solar cells. The result is relevant for the large field of research on nanophotonic light trapping in thin-film solar cells which currently investigates and prototypes a number of new concepts including disordered periodic and quasi periodic textures.

Paetzold, U. W., E-mail: u.paetzold@fz-juelich.de; Smeets, M.; Meier, M.; Bittkau, K.; Merdzhanova, T.; Smirnov, V.; Carius, R.; Rau, U. [IEK5—Photovoltaik, Forschungszentrum Jülich GmbH, 52425 Jülich (Germany); Michaelis, D.; Waechter, C. [Fraunhofer Institut für Angewandte Optik und Feinmechanik, Albert Einstein Str. 7, D-07745 Jena (Germany)

2014-03-31T23:59:59.000Z

42

Nanoparticle-induced light scattering for improved performance of quantum-well solar cells  

E-Print Network [OSTI]

performance of InP/InGaAsP quantum-well waveguide solar cells via light scattering from deposited dielectric of quantum wells to ensure high photon absorption efficiency and increased short-circuit current den- sity homojunction device by extending the absorption spectrum to longer wavelengths.6,7 We show here that nor- mally

Yu, Edward T.

43

Improved Energy Conversion Efficiency in Wide-Bandgap Cu(In,Ga)Se2 Solar Cells: Preprint  

SciTech Connect (OSTI)

This report outlines improvements to the energy conversion efficiency in wide bandgap (Eg>1.2 eV) solar cells based on CuIn1-xGaxSe2. Using (a) alkaline containing high temperature glass substrates, (b) elevated substrate temperatures 600?C-650?C and (c) high vacuum evaporation from elemental sources following NREL's three-stage process, we have been able to improve the performance of wider bandgap solar cells with 1.218% for absorber bandgaps ~1.30 eV and efficiencies ~16% for bandgaps up to ~1.45 eV. In comparing J-V parameters in similar materials, we establish gains in the open-circuit voltage and, to a lesser degree, the fill factor value, as the reason for the improved performance. The higher voltages seen in these wide gap materials grown at high substrate temperatures may be due to reduced recombination at the grain boundary of such absorber films. Solar cell results, absorber materials characterization, and experimental details are reported.

Contreras, M.; Mansfield, L.; Egaas, B.; Li, J.; Romero, M.; Noufi, R.; Rudiger-Voigt, E.; Mannstadt, W.

2011-07-01T23:59:59.000Z

44

Fabrication of heterojunction solar cells by improved tin oxide deposition on insulating layer  

DOE Patents [OSTI]

Highly efficient tin oxide-silicon heterojunction solar cells are prepared by heating a silicon substrate, having an insulating layer thereon, to provide a substrate temperature in the range of about 300.degree. C. to about 400.degree. C. and thereafter spraying the so-heated substrate with a solution of tin tetrachloride in a organic ester boiling below about 250.degree. C. Preferably the insulating layer is naturally grown silicon oxide layer.

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

1980-01-01T23:59:59.000Z

45

Performance improvement of CdS/Cu(In,Ga)Se2 solar cells after rapid thermal annealing  

Science Journals Connector (OSTI)

In this paper, we investigated the effect of rapid thermal annealing (RTA) on solar cell performance. An opto-electric conversion efficiency of 11.75% (Voc = 0.64 V, Jsc = 25.88 mA/cm2, FF=72.08%) was obtained under AM 1.5G when the cell was annealed at 300 ?C for 30 s. The annealed solar cell showed an average absolute efficiency 1.5% higher than that of the as-deposited one. For the microstructure analysis and the physical phase confirmation, X-ray diffraction (XRD), Raman spectra, front surface reflection (FSR), internal quantum efficiency (IQE), and X-ray photoelectron spectroscopy (XPS) were respectively applied to distinguish the causes inducing the efficiency variation. All experimental results implied that the RTA eliminated recombination centers at the p?n junction, reduced the surface optical losses, enhanced the blue response of the CdS buffer layer, and improved the ohmic contact between Mo and Cu(In, Ga)Se2 (CIGS) layers. This leaded to the improved performance of CIGS solar cell.

Chen Dong-Sheng (???); Yang Jie (? ?); Xu Fei (? ?); Zhou Ping-Hua (???); Du Hui-Wei (???); Shi Jian-Wei (???); Yu Zheng-Shan (???); Zhang Yu-Hong (???); Brian Bartholomeusz; Ma Zhong-Quan (???)

2013-01-01T23:59:59.000Z

46

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

47

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

48

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

49

Improved Performance of CuInS2 Quantum Dot-Sensitized Solar Cells Based on a Multilayered Architecture  

Science Journals Connector (OSTI)

Dye-sensitized solar cells (DSSCs) are a promising renewable solar energy source because of their low cost, high durability, and low environmental impact. ... One of the important factors limiting solar-cell efficiency is that incident photons generate one electron-hole pair, irresp. of the photon energy. ... Among the third-generation photovoltaic devices, much attention is being paid to the so-called Quantum Dot sensitized Solar Cells (QDSCs). ...

Jia-Yaw Chang; Jie-Mo Lin; Li-Fong Su; Chia-Fu Chang

2013-08-12T23:59:59.000Z

50

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

51

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

52

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

53

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

54

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

55

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

56

Improved large-area, two-terminal InP/Ga{sub 0.47}In{sub 0.53}As tandem solar cells  

SciTech Connect (OSTI)

Progress in the development of high-efficiency, large-area, two-terminal InP/Ga{sub 0.47}In{sub 0.53}As tandem solar cells is reported. Five tandem cells with total areas of {approximately}4 cm{sup 2}, with 1-sun AM0 efficiencies ranging from 19.4% to 21.1%, were prepared for the STRV-1 satellite solar cell flight experiment. Additionally, an {approximately}1 cm{sup 2} tandem cell with a 1-sun AM0 efficiency of 22.2% has been confirmed. Possible further improvements and performance potential are discussed.

Wanlass, M.W.; Ward, J.S.; Emery, K.A.; Duda, A.; Coutts, T.J. [National Renewable Energy Lab., Golden, CO (United States)

1994-12-31T23:59:59.000Z

57

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

58

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

59

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

60

Nanoclay Gelation Approach toward Improved Dye-Sensitized Solar Cell Efficiencies: An Investigation of Charge Transport and Shift in the TiO2 Conduction Band  

Science Journals Connector (OSTI)

Nanoclay Gelation Approach toward Improved Dye-Sensitized Solar Cell Efficiencies: An Investigation of Charge Transport and Shift in the TiO2 Conduction Band ... Nanoclay minerals play a promising role as additives in the liquid electrolyte to form a gel electrolyte for quasi-solid-state dye-sensitized solar cells, because of the high chemical stability, unique swelling capability, ion exchange capacity, and rheological properties of nanoclays. ... The nanoclays used in previous studies were mainly of smectite/montmorillonite type, which belong to the family of cationic clays (hydroxides layers with negative charge). ...

Xiu Wang; Sneha A. Kulkarni; Bruno Ieiri Ito; Sudip K. Batabyal; Kazuteru Nonomura; Chee Cheong Wong; Michael Grätzel; Subodh G. Mhaisalkar; Satoshi Uchida

2012-12-19T23:59:59.000Z

Note: This page contains sample records for the topic "improved solar cells" 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.


61

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

62

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

63

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

64

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

65

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

66

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

67

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

68

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,...

69

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

70

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

71

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

72

Improvement of the Photogalvanic Cell for Solar Energy Conversion and Storage: Rose Bengal–Oxalic Acid -Tween 80 System  

Science Journals Connector (OSTI)

Abstract In our work, Rose Bengal was used as photosensitizer with Oxalic acid as reductant and Tween 80 as surfactant for the enhancement of the conversion efficiency and storage capacity of photogalvanic cell for its commercial viability. The observed value of the photogeneration of photopotential was 666 mV and photocurrent was 119.5 ?A whereas maximum power of the cell was 79.58 ?W. The observed power at power point was 22.308 ?W and the conversion efficiency was 0.258%. The fill factor 0.328 was experimentally determined at the power point of the cell. The photogalvanic cell so developed can work for 230 min in dark on irradiation for 72 min, i.e. the storage capacity of the photogalvanic cell is. The effects of different parameters on electrical output of the cell were observed and a tentative mechanism has also been proposed for the generation of photocurrent in photogalvanic cell.The photogalvanic cell was subjected to the solar energy in Egypt on summer. A higher photovoltage of 815 mv was obtained. The cell can keep the energy for a longer time. On the recycling using solar energy for seven days using the same cell solution, the same photovoltage and photocurrent was obtained.

Sawsan A. Mahmoud; Basma S. Mohamed; A.S. El-Tabei; M.A. Hegazy; Mohamed A. Betiha; H.M. Killa; Ebtisam K. Heikal; Salah A.K. Halil; Mamdouh Dohium; Samar B. Hosney

2014-01-01T23:59:59.000Z

73

Improved photovoltaic performance of InGaN/GaN solar cells with optimized transparent current spreading layers  

Science Journals Connector (OSTI)

In0.135Ga0.865N/GaN p–i–n solar cells are fabricated and investigated with three types of transparent current spreading layers (TCSLs): Ni/Au layer type (Ni/Au-L), Ni/Au grid type (Ni/Au-G), and ITO layer type (I...

X. M. Cai; Y. Wang; Z. D. Li; X. Q. Lv; J. Y. Zhang; L. Y. Ying…

2013-05-01T23:59:59.000Z

74

Fabrication of ZnO/Cu2O heterojunctions in atmospheric conditions: improved interface quality and solar cell performance  

E-Print Network [OSTI]

Zn_1-xMg_xO/Cu_2O heterojunctions were successfully fabricated in open-air at low temperatures via atmospheric atomic layer deposition of Zn_1-xMg_xO on thermally oxidized cuprous oxide. Solar cells employing these heterojunctions demonstrated a...

Ievskaya, Y.; Hoye, R. L. Z.; Sadhanala, A.; Musselman, K.; MacManus-Driscoll, J. L.

2014-01-01T23:59:59.000Z

75

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.

76

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

77

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

78

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

79

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

80

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

Note: This page contains sample records for the topic "improved solar cells" 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

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).

82

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

83

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

84

ADOPT-A-CELL PROGRAM Help support the success of the CalSol solar team by  

E-Print Network [OSTI]

ADOPT-A-CELL PROGRAM Help support the success of the CalSol solar team by adopting a small part. $20: Solar Encapsulation High-tech solar lamination improves solar energy collection and increases the durability of solar cells. The money will go towards laminating one single solar cell. $50: Solar Cell Solar

Mofrad, Mohammad R. K.

85

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.

86

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

87

Improved blue response and efficiency of A-Si:H solar cells deposited from disilane using a dual-chamber plasma system  

SciTech Connect (OSTI)

Thin film amorphous silicon solar cells with glass/SnO/sub 2//p/i/n/Al structures and 6 to 7% AM1 conversion efficiencies were fabricated at rapid deposition rates in a newly constructed dual-chamber glow discharge deposition system. The 500 nm thick intrinsic layer was deposited at the rate of 1.7 nm/s using disilane (Si/sub 2/H/sub 6/)-helium mixtures. This deposition rate is an order of magnitude greater than conventional high efficiency amorphous silicon solar cell depositions. Residual boron doping effects at the p/i interface can severely degrade cell performance particularly when the intrinsic layer is deposited in one chamber of the dual-chamber system and the intrinsic layer is deposited in the other chamber that is free of boron contaminants. Parameters such as electrode spacing, Si/sub 2/H/sub 6/ partial pressure and flow rate were optimized to produce uniform deposition over large areas. At the substrate temperature T/sub s/ selected for solar cell intrinsic layer deposition, the spin density was measured to be a minimum at 5 x 10/sup 15//cm/sup 3/. For a given T/sub s/, an intrinsic layer deposited from Si/sub 2/H/sub 6/ absorbs fewer photons and can generate less current under solar simulation than a similar film produced from monosilane. Identical solar cells were deposited in either the single-chamber mode or the dual-chamber mode for comparison. Single-chamber mode cells perform poorly over the visible wavelengths and hence produce low short circuit currents. The dual-chamber mode cells show a significant improvement in blue response and a factor of two increase in short circuit current over the single-chamber mode cells. Under short circuit conditions, 15 mA/cm/sup 2/ was generated from rapidly deposited (1.7 nm/s) cells from disilane and 18 mA/cm/sup 2/ from low deposition rate (0.18 nm/s) monosilane cells. These values are comparable to or better than those reported for similar cells by other groups.

Rajeswaran, G.; Vanier, P.E.; Corderman, R.R.; Kampas, F.J.

1985-01-01T23:59:59.000Z

88

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

89

Predicted roles of defects on band offsets and energetics at CIGS (Cu(In,Ga)Se2/CdS) solar cell interfaces and implications for improving performance  

E-Print Network [OSTI]

, and in- deed the global operating capacity for solar photovoltaics is increasing steadily.1 CurrentlyPredicted roles of defects on band offsets and energetics at CIGS (Cu(In,Ga)Se2/CdS) solar cell ZnO sputtering on the performance of Cu(In,Ga)Se2 thin film solar cells Appl. Phys. Lett. 105, 083906

Goddard III, William A.

90

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

91

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

92

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

93

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

94

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

95

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

96

Material and Device Analysis for Efficiency Improvement in Epitaxial Crystalline Solar Cells: Cooperative Research and Development Final Report, CRADA Number CRD-11-433  

SciTech Connect (OSTI)

Crystal Solar has a novel approach for producing low-cost, monocrystalline silicon wafers that are capable of yielding high-efficiency solar cells. The approach involves epitaxial growth of the substrate and a proprietary lift-off technology. Crystal Solar will send selected wafers and cells to NREL for characterization and analyses. NREL will apply a variety of techniques to help identify mechanism(s) that limit the cell efficiency and suggest suitable approaches for mitigation.

Sopori, B.

2014-01-01T23:59:59.000Z

97

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

98

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

99

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

100

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

Note: This page contains sample records for the topic "improved solar cells" 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.


101

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

102

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

103

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

104

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

105

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

106

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

107

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...

108

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

109

Expansion and Improvement of Solar Water Heating Technology in...  

Open Energy Info (EERE)

Expansion and Improvement of Solar Water Heating Technology in China Project Management Office Jump to: navigation, search Name: Expansion and Improvement of Solar Water Heating...

110

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

111

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

112

A Review of Thin Film Silicon for Solar Cell Applications  

E-Print Network [OSTI]

A Review of Thin Film Silicon for Solar Cell Applications May 99 Contents 1 Introduction 3 2 Low 2.2.3 Deposition onto foreign substrates with the intention of improving crystallographic nature Field Cells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 11

113

Thermal Sintering Improves the Short Circuit Current of Solar Cells Sensitized with CdTe/CdSe Core/Shell Nanocrystals  

Science Journals Connector (OSTI)

Aqueous colloidal solution of CdTe/CdSe core/shell nanocrystals used in this sensitized solar cells were synthesized using a wet chemical method. These colloidal nanocrystals were capped with Mercapto-Succinic...

Padmashri Patil

2014-01-01T23:59:59.000Z

114

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

115

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

116

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,...

117

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

118

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

119

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.

120

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

Note: This page contains sample records for the topic "improved solar cells" 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

Improving PbS Quantum Dot Solar Cell Power Conversion Efficiency to an NREL-Certified 4.4% (Fact Sheet)  

SciTech Connect (OSTI)

Transition metal oxide improves overall efficiency and maintains performance with inexpensive metals. A research team at the National Renewable Energy Laboratory (NREL) has demonstrated that inserting a transition metal oxide (TMO) between the lead sulfide (PbS) quantum dot (QD) layer and the metal electrode eliminates the Schottky barrier that impedes efficient hole extraction and thereby improves the overall conversion efficiency. This allows for inexpensive metals such as Al to be employed without loss of performance. n-type TMOs consisting of molybdenum oxide (MoO{sub x}) and vanadium oxide (V{sub 2}O{sub x}) were used as an efficient hole extraction layer (HEL) in heterojunction ZnO/PbS QD solar cells. A 4.4% NREL-certified device was reported based on the MoO{sub x} HEL with Al as the back contact material, representing a more than 65% efficiency improvement compared with the case of Au contacting the PbS QD layer directly. The team finds the acting mechanism of the HEL to be a dipole formed at the MoO{sub x} and PbS interface, which enhances band bending to allow efficient hole extraction from the valence band of the PbS layer by MoO{sub x}. The carrier transport to the metal anode is likely enhanced through shallow gap states in the MoO{sub x} layer.

Not Available

2012-01-01T23:59:59.000Z

122

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

123

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

124

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...

125

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

126

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

127

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.

128

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...

129

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

130

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

131

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

132

Impurity and back contact effects on CdTe/CdS thin film solar cells.  

E-Print Network [OSTI]

??CdTe/CdS thin film solar cells are the most promising cost-effective solar cells. The goal of this project is to improve the performance for CdS/CdTe devices… (more)

Zhao, Hehong

2008-01-01T23:59:59.000Z

133

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

134

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

135

Plasmonic Scattering Enhancement of Quantum Well Solar Cells  

Science Journals Connector (OSTI)

Quantum-well solar cells offer a route to photovoltaic power conversion with predicted efficiencies of 45-63%. We discuss methods of improving their performance by engineering photon...

Yu, Edward T

136

Efficient light-trapping nanostructures in thin silicon solar cells  

E-Print Network [OSTI]

We examine light-trapping in thin crystalline silicon periodic nanostructures for solar cell applications. Using group theory, we show that light-trapping can be improved over a broad band when structural mirror symmetry ...

Han, Sang Eon

137

Advanced cost-effective crystalline silicon solar cell technologies  

Science Journals Connector (OSTI)

An overview is given concerning current industrial technologies, near future improvements and medium-term developments in the field of industrially viable crystalline silicon terrestrial solar cell fabrication (without concentration).

J.F Nijs; J Szlufcik; J Poortmans; S Sivoththaman; R.P Mertens

2001-01-01T23:59:59.000Z

138

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

139

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

140

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

Note: This page contains sample records for the topic "improved solar cells" 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

Microbial Fuel Cells -Solar Times http://solar.rain-barrel.net/microbial-fuel-cells/ 1 of 3 6/28/2006 11:32 AM  

E-Print Network [OSTI]

.com Hydrogen Fuel Cells Buy Commercial & Educational Stacks PEM, Fuel Cell Generators & More! www.TheHydrogenCompany.com Hydrogen Fuel Cell Improve Your Fuel Economy 20 to 50% Begin Saving Fuel Now www.SaveMoreWithHydrogenMicrobial Fuel Cells - Solar Times http://solar.rain-barrel.net/microbial-fuel-cells/ 1 of 3 6

Lovley, Derek

142

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.

143

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

144

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

145

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

146

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.

147

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.

148

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

149

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

150

Graphene composite for improvement in the conversion efficiency of flexible poly 3-hexyl-thiophene:[6,6]-phenyl C{sub 71} butyric acid methyl ester polymer solar cells  

SciTech Connect (OSTI)

The solution of thin graphene-sheets obtained from a simple ultrasonic exfoliation process was found to chemically interact with [6,6]-phenyl C{sub 71} butyric acid methyl ester (PCBM) molecules. The thinner graphene-sheets have significantly altered the positions of highest occupied molecular orbital and lowest unoccupied molecular orbital of PCBM, which is beneficial for the enhancement of the open circuit voltage of the solar cells. Flexible bulk heterojunction solar cells fabricated using poly 3-hexylthiophene (P3HT):PCBM-graphene exhibited a power conversion efficiency of 2.51%, which is a ?2-fold increase as compared to those fabricated using P3HT:PCBM. Inclusion of graphene-sheets not only improved the open-circuit voltage but also enhanced the short-circuit current density owing to an improved electron transport.

Chauhan, A. K., E-mail: akchau@barc.gov.in, E-mail: akc.barc@gmail.com; Gusain, Abhay; Jha, P.; Koiry, S. P.; Saxena, Vibha; Veerender, P.; Aswal, D. K.; Gupta, S. K. [Technical Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085 (India)

2014-03-31T23:59:59.000Z

151

Improved Solar Cell Efficiency Through the Use of an Additive Nanostructure-Based Optical Downshifter: Final Subcontract Report, January 28, 2010 -- February 28, 2011  

SciTech Connect (OSTI)

This final report summarizes all SpectraWatt's progress in achieving a boost in solar cell efficiency using an optical downshifter. Spectrawatt's downshifting technology is based on a nanostructured material system which absorbs high energy (short wavelength) light and reemits it at a lower energy (long wavelength) with high efficiency. This system has shown unprecedented performance parameters including near unity quantum yield and high thermal stability.

Kurtin, J.

2011-05-01T23:59:59.000Z

152

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

153

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

154

Eumelanin Dye-sensitized Solar Cell Grown with Matrix-assisted Pulsed Laser  

E-Print Network [OSTI]

Eumelanin Dye-sensitized Solar Cell Grown with Matrix-assisted Pulsed Laser Evaporation~4 DHICA DHICA #12; III Abstract At present the majority dye-sensitized solar cell research all, and besides provides and does not have other uses for the dye-sensitized solar cell use. In order to improve

155

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

156

Absorption Enhancement in Ultrathin Crystalline Silicon Solar Cells with Antireflection and Light-Trapping Nanocone Gratings  

E-Print Network [OSTI]

Absorption Enhancement in Ultrathin Crystalline Silicon Solar Cells with Antireflection and Light ABSTRACT: Enhancing the light absorption in ultrathin-film silicon solar cells is important for improving in the back reflector. KEYWORDS: Solar cells, light trapping, antireflection, crystalline silicon, absorption

Fan, Shanhui

157

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

158

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

159

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

160

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

Note: This page contains sample records for the topic "improved solar cells" 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

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

162

Technique Reveals Critical Physics in Deep Regions of Solar Cells (Fact Sheet)  

SciTech Connect (OSTI)

NREL's improved time-resolved photoluminescence method measures minority-carrier lifetime deep within photovoltaic samples to help develop more efficient solar cells.

Not Available

2014-01-01T23:59:59.000Z

163

Evaluating thermal imaging for identification and characterization of solar cell defects.  

E-Print Network [OSTI]

??Solar cells have become a primary technology in today's world for harvesting clean and renewable energy. Progress has been made towards improving the performance and… (more)

Chen, Jiahao

2014-01-01T23:59:59.000Z

164

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

165

Solar Power in the Desert: Are the current large-scale solar developments really improving California’s environment?  

E-Print Network [OSTI]

large scale solar developments in California will impactpoorly placed solar arrays in California leads to the losslarge-scale solar developments really improving California’s

Allen, Michael F.; McHughen, Alan

2011-01-01T23:59:59.000Z

166

Efficiency of silicon solar cells containing chromium  

DOE Patents [OSTI]

Efficiency of silicon solar cells containing about 10.sup.15 atoms/cm.sup.3 of chromium is improved about 26% by thermal annealing of the silicon wafer at a temperature of 200.degree. C. to form chromium precipitates having a diameter of less than 1 Angstrom. Further improvement in efficiency is achieved by scribing laser lines onto the back surface of the wafer at a spacing of at least 0.5 mm and at a depth of less than 13 micrometers to preferentially precipitate chromium near the back surface and away from the junction region of the device. This provides an economical way to improve the deleterious effects of chromium, one of the impurities present in metallurgical grade silicon material.

Frosch, Robert A. Administrator of the National Aeronautics and Space (New Port Beach, CA); Salama, Amal M. (New Port Beach, CA)

1982-01-01T23:59:59.000Z

167

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

168

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

169

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

170

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

171

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

172

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

173

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

174

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

175

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...

176

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

177

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

178

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

179

Mode Splitting for Efficient Plasmoinc Thin-film Solar Cell  

E-Print Network [OSTI]

We propose an efficient plasmonic structure consisting of metal strips and thin-film silicon for solar energy absorption. We numerically demonstrate the absorption enhancement in symmetrical structure based on the mode coupling between the localized plasmonic mode in Ag strip pair and the excited waveguide mode in silicon slab. Then we explore the method of symmetry-breaking to excite the dark modes that can further enhance the absorption ability. We compare our structure with bare thin-film Si solar cell, and results show that the integrated quantum efficiency is improved by nearly 90% in such thin geometry. It is a promising way for the solar cell.

Li, Tong; Jiang, Chun

2010-01-01T23:59:59.000Z

180

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

Note: This page contains sample records for the topic "improved solar cells" 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

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

182

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

183

Improving the performance of floating solar pool covers  

SciTech Connect (OSTI)

Experimental and analytical analyses are presented for the evaluation of heat transfer through floating solar swimming pool covers. Two improved floating solar swimming pool cover designs are proposed and investigated in this paper. The results conclusively show that both new cover designs should have significantly better performance than conventional floating solar swimming pool covers.

Cole, M.A.; Lowrey, P. (San Diego State Univ., CA (United States). Dept. of Mechanical Engineering)

1992-11-01T23:59:59.000Z

184

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

185

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

186

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

187

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

188

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

189

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

190

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

191

Florida Solar Energy Center (Building America Partnership for Improved  

Open Energy Info (EERE)

(Building America Partnership for Improved (Building America Partnership for Improved Residential Construction Jump to: navigation, search Name Florida Solar Energy Center (Building America Partnership for Improved Residential Construction Place Orlando, FL Website http://www.floridasolarenergyc References Florida Solar Energy Center (Building America Partnership for Improved Residential Construction[1] Information About Partnership with NREL Partnership with NREL Yes Partnership Type Incubator Partnering Center within NREL Electricity Resources & Building Systems Integration LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! Florida Solar Energy Center (Building America Partnership for Improved Residential Construction is a company located in Orlando, FL. References

192

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

193

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

194

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

195

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...

196

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...

197

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...

198

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

199

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...

200

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.

Note: This page contains sample records for the topic "improved solar cells" 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

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.

202

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.

203

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.

204

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.

205

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.

206

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

207

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

208

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.

209

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

210

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

211

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

212

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

213

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...

214

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

215

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

216

Comparison of the device physics principles of planar and radial p-n junction nanorod solar cells  

E-Print Network [OSTI]

Comparison of the device physics principles of planar and radial p-n junction nanorod solar cells been developed for radial p-n junction nanorod solar cells, in which densely packed nanorods, each improvements in efficiency relative to a conventional planar geometry p-n junction solar cell, provided

Atwater, Harry

217

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

218

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

219

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

220

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

Note: This page contains sample records for the topic "improved solar cells" 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

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

222

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

223

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...

224

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

225

DOE Outlines Research Needed to Improve Solar Energy Technologies |  

Broader source: Energy.gov (indexed) [DOE]

Outlines Research Needed to Improve Solar Energy Technologies Outlines Research Needed to Improve Solar Energy Technologies DOE Outlines Research Needed to Improve Solar Energy Technologies August 12, 2005 - 2:39pm Addthis WASHINGTON, D.C. - To help achieve the Bush Administration's goal of increased use of solar and other renewable forms of energy, the Department of Energy's (DOE) Office of Science has released a report describing the basic research needed to produce "revolutionary progress in bringing solar energy to its full potential in the energy marketplace." The report resulted from a workshop of 200 scientists held earlier this year. "The tax credits contained in the historic energy bill signed by President Bush will greatly help expand the use of renewable energy," said Dr. Raymond L. Orbach, Director of DOE's Office of Science. "This research

226

Suggested improvements to solar system maintenance based on field experience  

SciTech Connect (OSTI)

Field experience has shown that maintenance is a critical factor in determining the overall success of a solar system. This paper summarizes the field experience with the maintenance of over 30 solar installations, three of which contain more than 500 individual solar systems for residential housing. The field results show several severe problems, and an analysis indicates that a number of improvements can be made to help avoid them. These include (1) improving solar designs, (2) producing service documents, and (3) providing training for maintenance personnel. Specific technical improvements to solar designs are presented in this paper, the number and content of service documents are outlined, and suggestions for training of maintenance personnel are presented.

Johnson, D.L.; Hittle, D.C.; Joncich, D.M.

1983-06-01T23:59:59.000Z

227

Improving Air Quality with Solar Energy  

SciTech Connect (OSTI)

This fact sheet series highlights how renewable energy and energy efficiency technologies can and are being used to reduce air emissions and meet environmental goals, showcasing case studies and technology-specific topics. This one focus on solar energy technologies.

Not Available

2008-04-01T23:59:59.000Z

228

Improving Air Quality with Solar Energy  

DOE R&D Accomplishments [OSTI]

This fact sheet series highlights how renewable energy and energy efficiency technologies can and are being used to reduce air emissions and meet environmental goals, showcasing case studies and technology-specific topics. This one focus on solar energy technologies.

2008-04-00T23:59:59.000Z

229

Copper doped polycrystalline silicon solar cell  

DOE Patents [OSTI]

Photovoltaic cells having improved performance are fabricated from polycrystalline silicon containing copper segregated at the grain boundaries.

Lovelace, Alan M. Administrator of the National Aeronautics and Space (La Canada, CA); Koliwad, Krishna M. (La Canada, CA); Daud, Taher (La Crescenta, CA)

1981-01-01T23:59:59.000Z

230

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

231

Energy Level Alignment in PCDTBT:PC70BM Solar Cells: Solution Processed NiOx for Improved Hole Collection and Efficiency  

SciTech Connect (OSTI)

Solution-based NiO{sub x} outperforms PEDOT:PSS in device performance and stability when used as a hole-collection layer in bulk-heterojunction (BHJ) solar cells formed with poly[N-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT) and PC70BM. The origin of the enhancement is clarified by studying the interfacial energy level alignment between PCDTBT or the 1:4 blended heterojunctions and PEDOT:PSS or NiO{sub x} using ultraviolet and inverse photoemission spectroscopies. The 1.6 eV electronic gap of PEDOT:PSS and energy level alignment with the BHJ result in poor hole selectivity of PEDOT:PSS and allows electron recombination at the PEDOT:PSS/BHJ interface. Conversely, the large band gap (3.7 eV) of NiO{sub x} and interfacial dipole (0.6 eV) with the organic active layer leads to a hole-selective interface. This interfacial dipole yields enhanced electron blocking properties by increasing the barrier to electron injection. The presence of such a strong dipole is predicted to further promote hole collection from the organic layer into the oxide, resulting in increased fill factor and short circuit current. An overall decrease in recombination is manifested in an increase in open circuit voltage and power conversion efficiency of the device on NiO{sub x} versus PEDOT:PSS interlayers.

Ratcliff, E. L.; Meyer, J.; Steirer, K. X.; Armstrong, N. R.; Olson, D.; Kahn, A.

2012-05-01T23:59:59.000Z

232

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

233

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

234

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

235

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

236

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.

237

* 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

238

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network [OSTI]

for Improvement of Photovoltaic Solar Energy Converters,”drastic improvement in photovoltaic (PV) energy conversionwith photovoltaic devices to improve the energy conversion

Shao, Qinghui

2009-01-01T23:59:59.000Z

239

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

240

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

Note: This page contains sample records for the topic "improved solar cells" 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

Modeling of InGaN/Si tandem solar cells  

Science Journals Connector (OSTI)

We investigate theoretically the characteristics of monolithic InGaN/Si two-junction series-connected solar cells using the air mass 1.5 global irradiance spectrum. The addition of an InGaN junction is found to produce significant increases in the energy conversion efficiency of the solar cell over that of one-junction Si cells. Even when Si is not of high quality such two-junction cells could achieve efficiencies high enough to be practically feasible. We also show that further though smaller improvements of the efficiency can be achieved by adding another junction to form an InGaN/InGaN/Si three-junction cell.

L. Hsu; W. Walukiewicz

2008-01-01T23:59:59.000Z

242

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

243

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,...

244

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...

245

Optical system for determining physical characteristics of a solar cell  

DOE Patents [OSTI]

The invention provides an improved optical system for determining the physical characteristics of a solar cell. The system comprises a lamp means for projecting light in a wide solid-angle onto the surface of the cell; a chamber for receiving the light through an entrance port, the chamber having an interior light absorbing spherical surface, an exit port for receiving a beam of light reflected substantially normal to the cell, a cell support, and an lower aperture for releasing light into a light absorbing baffle; a means for dispersing the reflection into monochromatic components; a means for detecting an intensity of the components; and a means for reporting the determination.

Sopori, Bhushan L. (Denver, CO)

2001-01-01T23:59:59.000Z

246

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

247

LBIC ANALYSIS OF THIN-FILM POLYCRYSTALLINE SOLAR CELLS James R. Sites and Timothy J. Nagle  

E-Print Network [OSTI]

LBIC ANALYSIS OF THIN-FILM POLYCRYSTALLINE SOLAR CELLS James R. Sites and Timothy J. Nagle Physics response map, was developed and used to map defects in thin-film solar cells [4]. Improvements to the two) measurements are providing a direct link between the spatial non-uniformities inherent in thin-film

Sites, James R.

248

Plasmonic nanoparticle enhanced light absorption in GaAs solar cells Keisuke Nakayama,a  

E-Print Network [OSTI]

Plasmonic nanoparticle enhanced light absorption in GaAs solar cells Keisuke Nakayama,a Katsuaki 22 September 2008 We demonstrate an improvement in efficiency of optically thin GaAs solar cells-ratio nanoparticles effectively increases the optical path of the incident light in the absorber layers resulting

Atwater, Harry

249

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.

250

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

251

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

252

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

253

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

254

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

255

Measuring and Improving Cell Capability  

E-Print Network [OSTI]

Measuring and Improving Cell Capability by Tom Bering Rate Parts / Hour Parts / Car Good Parts 1000 ppm defects/part 1 ppm defects/part 0.1 ppm defects/part 0.001 ppm defects/part 3600 Good Parts / Hour Defect Every 20 Min. Defect Every 2 Weeks Defect Every 20 Weeks Defect Every 40 Years 5000 Good Parts = 1

Bone, Gary

256

Design criteria for Si point-contact concentrator solar cells  

SciTech Connect (OSTI)

Design criteria for concentrator solar cells are presented for the highly three-dimensional case of backside point-contact solar cells. A recent new experimental result, a 28-percent efficient cell (25/sup 0/C, 15-Wcm/sup 2/ incident power) is used as a case study of the dependences of the recombination components and the carrier density gradients on the geometrical design parameters. The optimum geometry is found to depend upon the intended design power density as well as the attainable physical parameters allowed by the fabrication techniques utilized. Modeling projections indicate that an ultimate efficiency of 30.6 percent (36 Wcm/sup 2/, 300 K) is achievable using the diffused emitters presently employed on these cells. Incorporation of results from the study pf polycrystalline emitters could improve these efficiencies toward 31.7 percent.

Sinton, R.A.; Swanson, R.M.

1987-10-01T23:59:59.000Z

257

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

258

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

259

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

260

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 "improved solar cells" 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

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

262

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

263

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

264

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

265

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.

266

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

267

Local Option - Renewable Energy Financing District/Solar Energy Improvement  

Broader source: Energy.gov (indexed) [DOE]

Local Option - Renewable Energy Financing District/Solar Energy Local Option - Renewable Energy Financing District/Solar Energy Improvement Special Assessments Local Option - Renewable Energy Financing District/Solar Energy Improvement Special Assessments < Back Eligibility Commercial Residential Savings Category Buying & Making Electricity Solar Heating & Cooling Commercial Heating & Cooling Heating Water Heating Wind Program Info Start Date 07/01/2009 State New Mexico Program Type PACE Financing Provider New Mexico Energy, Minerals and Natural Resources Department '''''Note: The Federal Housing Financing Agency (FHFA) issued a [http://www.fhfa.gov/webfiles/15884/PACESTMT7610.pdf statement] in July 2010 concerning the senior lien status associated with most PACE programs. In response to the FHFA statement, most local PACE programs have been

268

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

269

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

270

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

271

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

272

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

273

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

274

Highly Mismatched Alloys for Intermediate Band Solar Cells  

SciTech Connect (OSTI)

It has long been recognized that the introduction of a narrow band of states in a semiconductor band gap could be used to achieve improved power conversion efficiency in semiconductor-based solar cells. The intermediate band would serve as a ''stepping stone'' for photons of different energy to excite electrons from the valence to the conduction band. An important advantage of this design is that it requires formation of only a single p-n junction, which is a crucial simplification in comparison to multijunction solar cells. A detailed balance analysis predicts a limiting efficiency of more than 50% for an optimized, single intermediate band solar cell. This is higher than the efficiency of an optimized two junction solar cell. Using ion beam implantation and pulsed laser melting we have synthesized Zn{sub 1-y}Mn{sub y}O{sub x}Te{sub 1-x} alloys with x<0.03. These highly mismatched alloys have a unique electronic structure with a narrow oxygen-derived intermediate band. The width and the location of the band is described by the Band Anticrossing model and can be varied by controlling the oxygen content. This provides a unique opportunity to optimize the absorption of solar photons for best solar cell performance. We have carried out systematic studies of the effects of the intermediate band on the optical and electrical properties of Zn{sub 1-y}Mn{sub y}O{sub x}Te{sub 1-x} alloys. We observe an extension of the photovoltaic response towards lower photon energies, which is a clear indication of optical transitions from the valence to the intermediate band.

Walukiewicz, W.; Yu, K.M.; Wu, J.; Ager III, J.W.; Shan, W.; Scrapulla, M.A.; Dubon, O.D.; Becla, P.

2005-03-21T23:59:59.000Z

275

High Efficiency Silicon Solar Cells  

Science Journals Connector (OSTI)

Conversion efficiency has emerged as an important contributor to further reducing photovoltaic system cost. This presentation will discuss the various improvements that have increased...

Swanson, Richard

276

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

277

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

278

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

279

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

280

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...

Note: This page contains sample records for the topic "improved solar cells" 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

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

282

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

283

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

284

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

285

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

286

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

287

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

288

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

289

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

290

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

291

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

292

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

293

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

294

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

295

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.

296

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

297

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.

298

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.

299

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

300

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

Note: This page contains sample records for the topic "improved solar cells" 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

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

302

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

303

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

304

Expansion and Improvement of Solar Water Heating Technology in China  

Open Energy Info (EERE)

Improvement of Solar Water Heating Technology in China Improvement of Solar Water Heating Technology in China Project Management Office Jump to: navigation, search Name Expansion and Improvement of Solar Water Heating Technology in China Project Management Office Place Beijing, Beijing Municipality, China Zip 100038 Sector Buildings, Solar Product The programme focuses on the development of high-quality and attractive-looking model designs for integrating solar water heaters (SWH) into buildings in China. Coordinates 39.90601°, 116.387909° 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":39.90601,"lon":116.387909,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

305

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

306

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

307

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

308

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

309

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

310

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

311

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...

312

SunShot Initiative: Solar Power Tower Improvements with the Potential to  

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

Solar Power Tower Improvements Solar Power Tower Improvements with the Potential to Reduce Costs to someone by E-mail Share SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Facebook Tweet about SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Twitter Bookmark SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Google Bookmark SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Delicious Rank SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Digg Find More places to share SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on AddThis.com... Concentrating Solar Power

313

High Rate Laser Pitting Technique for Solar Cell Texturing  

SciTech Connect (OSTI)

High rate laser pitting technique for solar cell texturing Efficiency of crystalline silicon solar cells can be improved by creating a texture on the surface to increase optical absorption. Different techniques have been developed for texturing, with the current state-of-the-art (SOA) being wet chemical etching. The process has poor optical performance, produces surfaces that are difficult to passivate or contact and is relatively expensive due to the use of hazardous chemicals. This project shall develop an alternative process for texturing mc-Si using laser micromachining. It will have the following features compared to the current SOA texturing process: -Superior optical surfaces for reduced front-surface reflection and enhanced optical absorption in thin mc-Si substrates -Improved surface passivation -More easily integrated into advanced back-contact cell concepts -Reduced use of hazardous chemicals and waste treatment -Similar or lower cost The process is based on laser pitting. The objective is to develop and demonstrate a high rate laser pitting process which will exceed the rate of former laser texturing processes by a factor of ten. The laser and scanning technologies will be demonstrated on a laboratory scale, but will use inherently technologies that can easily be scaled to production rates. The drastic increase in process velocity is required for the process to be implemented as an in-line process in PV manufacturing. The project includes laser process development, development of advanced optical systems for beam manipulation and cell reflectivity and efficiency testing. An improvement of over 0.5% absolute in efficiency is anticipated after laser-based texturing. The surface textures will be characterized optically, and solar cells will be fabricated with the new laser texturing to ensure that the new process is compatible with high-efficiency cell processing. The result will be demonstration of a prototype process that is suitable for scale-up to a production tool and process. The developed technique will have an reducing impact on product pricing. As efficiency has a substantial impact on the economics of solar cell production due to the high material cost content; in essence, improved efficiency through cost-effective texturing reduces the material cost component since the product is priced in terms of $/W. The project is a collaboration between Fraunhofer USA, Inc. and a c-Si PV manufacturer.

Hans J. Herfurth; Henrikki Pantsar

2013-01-10T23:59:59.000Z

314

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

315

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

316

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.

317

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

318

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

319

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":""}]}

320

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

Note: This page contains sample records for the topic "improved solar cells" 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

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

322

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

323

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

324

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

325

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

326

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

327

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

328

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.

329

Analysis of strategies to improve heliostat tracking at Solar Two  

SciTech Connect (OSTI)

This paper investigates different strategies that can be used to improve the tracking accuracy of heliostats at Solar Two. The different strategies are analyzed using a geometrical error model to determine their performance over the course of a day. By using the performance of heliostats in representative locations of the field and on representative days of the year, an estimate of the annual performance of each strategy is presented.

Jones, S.A.; Stone, K.W.

1999-07-01T23:59:59.000Z

330

Analysis of Strategies to Improve Heliostat Tracking at Solar Two  

SciTech Connect (OSTI)

This paper investigates dhlerent strategies that can be used to improve the tracking accuracy of heliostats at Solar Two. The different strategies are analyzed using a geometrical error model to determine their performance over the course of a day. By using the performance of heliostats in representative locations of the field aad on representative days of the year, an estimate of the annual performance of each strategy is presented.

Jones, S.A.; Stone, K.W.

1999-01-14T23:59:59.000Z

331

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

332

'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.

333

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

334

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

335

Improved high temperature solar absorbers for use in Concentrating Solar Power central receiver applications.  

SciTech Connect (OSTI)

Concentrating solar power (CSP) systems use solar absorbers to convert the heat from sunlight to electric power. Increased operating temperatures are necessary to lower the cost of solar-generated electricity by improving efficiencies and reducing thermal energy storage costs. Durable new materials are needed to cope with operating temperatures >600 C. The current coating technology (Pyromark High Temperature paint) has a solar absorptance in excess of 0.95 but a thermal emittance greater than 0.8, which results in large thermal losses at high temperatures. In addition, because solar receivers operate in air, these coatings have long term stability issues that add to the operating costs of CSP facilities. Ideal absorbers must have high solar absorptance (>0.95) and low thermal emittance (<0.05) in the IR region, be stable in air, and be low-cost and readily manufacturable. We propose to utilize solution-based synthesis techniques to prepare intrinsic absorbers for use in central receiver applications.

Stechel, Ellen Beth; Ambrosini, Andrea; Hall, Aaron Christopher; Lambert, Timothy L.; Staiger, Chad Lynn; Bencomo, Marlene

2010-09-01T23:59:59.000Z

336

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.

337

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

338

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

339

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

340

NREL Designs Promising New Oxides for Solar Cells (Fact Sheet)  

SciTech Connect (OSTI)

High-efficiency, thin-film solar cells require electrical contacts with high electrical conductivity, and the top contact must also have high optical transparency. This need is currently met by transparent conducting oxides (TCOs), which conduct electricity but are 90% transparent to visible light. Scientists at the National Renewable Energy Laboratory (NREL) have derived three key design principles for selecting promising materials for TCO contacts. NREL's application of these design principles has resulted in a 10,000-fold improvement in conductivity for one TCO material.

Not Available

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "improved solar cells" 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

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

342

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

343

Solar Cell Modules With Improved Backskin  

DOE Patents [OSTI]

The present invention relates to gas turbines and more particularly to a device for controlling the flow of cooling air through a flowpath in a turbine blade. The device can be inserted in the inlet opening of the blade flowpath and be retained therein. The device comprises a plug member for adjusting the flow of cooling air through the flowpath. The plug member comprises a retaining portion for retaining the plug member at the inlet opening of the flowpath and a blocking portion inserted within the flowpath for reducing the cross-sectional area of the inlet opening. Such a device is inexpensive and can be easily inserted in the inlet opening of a blade flowpath and retained therein.

Chevrefils, Andre (Chateauguay, CA); Grigore, Daniel Gheorghe (Pointe Claire, CA)

2001-01-23T23:59:59.000Z

344

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

345

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

346

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

347

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

348

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

349

Broadband Diffractive Optics for Enhancing the Efficiency of Solar Cells  

Science Journals Connector (OSTI)

We propose a broadband diffractive optics based spectrum splitting approach to enhance the efficiency of solar cells. Numerical simulations indicate ~27% and ~45% increase in output...

Menon, Rajesh; Wang, Peng; Mohammed, Nabil

350

Nanoarrays for Light Management in Thin Film Solar Cells  

Science Journals Connector (OSTI)

We report the use of plasmonic and photonic nanoarray to achieve light management in thin film solar cells. Theoretical and experimental data will be presented.

Ji, Jin; Nasr, Magued B; McCutcheon, Murray W; Herring, Cy

351

Ultrafast Carrier RelaxationProcesses in Advanced Concept Solar Cells  

Science Journals Connector (OSTI)

We discuss short time carrier relaxation in advanced concept solar cells conditions using ensemble Monte Carlo (EMC) simulation coupled with rate equation and thermodynamic models, to...

Goodnick, Stephen M; Honsberg, Christiana; Zou, Yongjie

352

Device Physics of Nanoscale Interdigitated Solar Cells: Preprint  

SciTech Connect (OSTI)

This paper uses multidimensional device simulation to explore the physics and solar cell performance of interdigitated p-n junctions for material parameters relevant to the postulated conditions.

Metzger, W. K.; Levi, D.

2008-05-01T23:59:59.000Z

353

Award-Winning Etching Process Cuts Solar Cell Costs  

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

into electricity. Manufacturers have tried to minimize the reflection of sunlight off of solar cells by first chemically etching micrometers-deep structures into the surface of...

354

OPVs and Solar Cells: The Basics | University of Texas Energy...  

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

environmental crises emanating from greenhouse gas production. Current solar cell technologies are largely silicon-based. Devices used for human energy consumption yield...

355

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

356

Polymer solar cell as an emerging PV technology  

Science Journals Connector (OSTI)

In the presentation, I will present progresses in polymer solar cell in recent years. Advances in material, device structure, morphology are the focus of the talk. ...

Li, Gang

357

Reliable and economical circuit I V characterization solar cells  

Science Journals Connector (OSTI)

A transistorized circuit for solar cells which is easy to assemble and use for undergraduate teaching laboratories is described.(AIP)

Y. H. Muoy; J. P. Charles; M. Adbelkrim

1981-01-01T23:59:59.000Z

358

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

359

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

360

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

Note: This page contains sample records for the topic "improved solar cells" 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

Solution-Processed Solar Cells using Colloidal Quantum Dots ...  

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

of solar cells and light sensors based on solution-processed semiconductors." He is a Fellow of the IEEE "... for contributions to colloidal quantum dot optoelectronic devices."...

362

Structure of All-Polymer Solar Cells Impedes Efficiency  

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

thin films of semiconducting polymers as a possible alternative to silicon-based solar cells. Such devices would have the advantages of being cheap to produce,...

363

Diffraction: Enhanced Light Absorption of Solar Cells and Photodetecto...  

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

Materials Advanced Materials Find More Like This Return to Search Diffraction: Enhanced Light Absorption of Solar Cells and Photodetectors Sandia National Laboratories Contact...

364

Molecular Weight Effect on the Efficiency of Polymer Solar Cells  

Science Journals Connector (OSTI)

Molecular Weight Effect on the Efficiency of Polymer Solar Cells ... § 1-Material Inc., 2290 Chemin St-François, Dorval, Quebec, H9P 1K2, Canada ...

Chang Liu; Kai Wang; Xiaowen Hu; Yali Yang; Chih-Hao Hsu; Wei Zhang; Steven Xiao; Xiong Gong; Yong Cao

2013-11-01T23:59:59.000Z

365

Quantum theory of operation for rectenna solar cells  

Science Journals Connector (OSTI)

Optical rectennas, sub-micrometre antenna-coupled diodes, can directly rectify solar and thermal electromagnetic radiation, and have been proposed as an alternative to conventional semiconductor photovoltaics. We develop a comprehensive description of the operating principle of rectenna solar cells. In prior work classical concepts from microwave rectenna theory have been applied to the analysis of photovoltaic power generation using these ultra-high frequency rectifiers. Because of their high photon energy the interaction of petahertz frequency waves with fast-responding diodes requires a semiclassical analysis. We use the theory of photon-assisted transport to derive the current–voltage [I(V)] characteristics of metal/insulator/metal tunnel diodes under illumination. We show how power is generated in the second quadrant of the I(V) characteristic, derive solar cell parameters, and analyse the key variables that influence the performance under monochromatic radiation and to a first order approximation. The efficiency improves with reduced dark current under reverse bias and increasing incident electromagnetic power.

Sachit Grover; Saumil Joshi; Garret Moddel

2013-01-01T23:59:59.000Z

366

An Overview of Solar Cell Technology Mike McGehee  

E-Print Network [OSTI]

An Overview of Solar Cell Technology Mike McGehee Materials Science and Engineering Global ClimateWatt and Evergreen Solar went bankrupt Jon Stewart, The Daily Show Solyndra, SpectraWatt and Evergreen Solar went provide 20 % of that. It takes a panel rated at 5 W, to average 1 W of power through the day and year, sog

McGehee, Michael

367

Folded-Light-Path Colloidal Quantum Dot Solar Cells  

E-Print Network [OSTI]

Folded-Light-Path Colloidal Quantum Dot Solar Cells Ghada I. Koleilat*, Illan J. Kramer*, Chris T, Canada. Colloidal quantum dot photovoltaics combine low-cost solution processing with quantum size-effect tuning to match absorption to the solar spectrum. Rapid advances have led to certified solar power

368

Photonic Design: From Fundamental Solar Cell Physics to Computational Inverse Design  

E-Print Network [OSTI]

of next-generation solar technologies. Part II approachesfor next-generation solar technologies. Conclusions Thislimit for any solar cell technology will require light

Miller, Owen Dennis

2012-01-01T23:59:59.000Z

369

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

370

Numerical simulation: Toward the design of high-efficiency planar perovskite solar cells  

SciTech Connect (OSTI)

Organo-metal halide perovskite solar cells based on planar architecture have been reported to achieve remarkably high power conversion efficiency (PCE, >16%), rendering them highly competitive to the conventional silicon based solar cells. A thorough understanding of the role of each component in solar cells and their effects as a whole is still required for further improvement in PCE. In this work, the planar heterojunction-based perovskite solar cells were simulated with the program AMPS (analysis of microelectronic and photonic structures)-1D. Simulation results revealed a great dependence of PCE on the thickness and defect density of the perovskite layer. Meanwhile, parameters including the work function of the back contact as well as the hole mobility and acceptor density in hole transport materials were identified to significantly influence the performance of the device. Strikingly, an efficiency over 20% was obtained under the moderate simulation conditions.

Liu, Feng; Zhu, Jun, E-mail: zhujzhu@gmail.com, E-mail: sydai@ipp.ac.cn; Wei, Junfeng; Li, Yi; Lv, Mei [Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China); Yang, Shangfeng [Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026 (China); Zhang, Bing; Yao, Jianxi [State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206 (China); Dai, Songyuan, E-mail: zhujzhu@gmail.com, E-mail: sydai@ipp.ac.cn [Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China); State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206 (China)

2014-06-23T23:59:59.000Z

371

Broadband omnidirectional antireflection coatings for metal-backed solar cells optimized using simulated annealing algorithm incorporated with solar spectrum  

Science Journals Connector (OSTI)

Broadband omnidirectional antireflection (AR) coatings for solar cells optimized using simulated annealing (SA) algorithm incorporated with the solar (irradiance) spectrum at Earth’s...

Chang, Yin-Jung; Chen, Yu-Ting

2011-01-01T23:59:59.000Z

372

Laser beam apparatus and method for analyzing solar cells  

DOE Patents [OSTI]

A laser beam apparatus and method for analyzing, inter alia, the current versus voltage curve at the point of illumination on a solar cell and the open circuit voltage of a solar cell. The apparatus incorporates a lock-in amplifier, and a laser beam light chopper which permits the measurement of the AC current of the solar cell at an applied DC voltage at the position on the solar cell where the cell is illuminated and a feedback scheme which permits the direct scanning measurements of the open circuit voltage. The accuracy of the measurement is a function of the intensity and wavelength of the laser light with respect to the intensity and wavelength distribution of sunlight and the percentage the dark current is at the open circuit voltage to the short circuit current of the solar cell.

Staebler, David L. (Lawrenceville, NJ)

1980-01-01T23:59:59.000Z

373

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

374

Physics and technologies of superhigh-efficiency tandem solar cells  

Science Journals Connector (OSTI)

The present status of superhigh-efficiency tandem solar cells has been reviewed and the key issues for realizing superhigh-efficiency have been discussed. The mechanical, stacked, three-junction cells of monol...

M. Yamaguchi

1999-09-01T23:59:59.000Z

375

Experimental analysis of I–V characteristics of solar cells  

Science Journals Connector (OSTI)

This paper describes a simple experiment that can be performed by undergraduate students to derive the values of solar cell parameters from the plot of the output load current versus the voltage at the terminals of the cell.

P. Mialhe; J. Charette

1983-01-01T23:59:59.000Z

376

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

377

Film Si Solar Cells with Nano Si: Cooperative Research and Development Final Report, CRADA Number CRD-09-00356  

SciTech Connect (OSTI)

Nevada Nanotechnology Center and Si group at NREL will work together to develop a-Si based solar cells with nano-Si technique. We will explore the existing a-Si based film solar cell technology at NREL and nano scale Si technology at Nevada Nanotechnology Center. By exchanging information, we will come; up with some new cell structures using nano-Si. We expect the new a-Si based cells will have optical enhancement or better electronic or optical properties of absorber layer to improve solar cell performance.

Wang, Q.

2011-05-01T23:59:59.000Z

378

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

379

CRADA Final Report: Process development for hybrid solar cells  

SciTech Connect (OSTI)

TCF funding of a CRADA between LBNL and RSLE leveraged RSLE's original $1M investment in LBNL research and led to development of a solar cell fabrication process that will bring the high efficiency, high voltage hybrid tandem solar cell closer to commercialization. RSLE has already built a pilot line at its Phoenix, Arizona site.

Ager, Joel W

2011-02-14T23:59:59.000Z

380

CURRENT NEWS Sandwich Solar Cells May See Off Silicon  

E-Print Network [OSTI]

CURRENT NEWS Sandwich Solar Cells May See Off Silicon May 24, 2010 A new manufacturing technique of devices using GaAs chips manufactured in multilayer stacks: light sensors, high-speed transistors and solar cells. The authors also provide a detailed cost comparison. Another advantage of the multilayer

Rogers, John A.

Note: This page contains sample records for the topic "improved solar cells" 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

Fundamental limit of nanophotonic light trapping in solar cells  

E-Print Network [OSTI]

Fundamental limit of nanophotonic light trapping in solar cells Zongfu Yu1 , Aaswath Raman and is becoming increasingly urgent for current solar cell research. The standard theory of light trapping) Establishing the fundamental limit of nanophotonic light-trapping schemes is of paramount importance

Fan, Shanhui

382

An expression for the bridge-mediated electron transfer rate in dye-sensitized solar cells  

Science Journals Connector (OSTI)

...transfer rate in dye-sensitized solar cells Emanuele Maggio Alessandro Troisi...CR) process in dye-sensitized solar cells, where the dye is often connected...tunnelling|dye-sensitized solar cell| 1. Introduction Dye-sensitized...

2014-01-01T23:59:59.000Z

383

FABRICATION AND CHARACTERIZATION OF 3-D ALL POLYMER FLEXIBLE SOLAR CELL  

E-Print Network [OSTI]

....................................................................................3 2 LITERATURE SURVEY ON THIN FILM ANDORGANIC/TANDEM SOLAR CELL........................................................................7 2.3 Thin Film Solar CellFABRICATION AND CHARACTERIZATION OF 3-D ALL POLYMER FLEXIBLE SOLAR CELL _______________ A Thesis

Kassegne, Samuel Kinde

384

Fundamental understanding and development of low-cost, high-efficiency silicon solar cells  

SciTech Connect (OSTI)

The overall objectives of this program are (1) to develop rapid and low-cost processes for manufacturing that can improve yield, throughput, and performance of silicon photovoltaic devices, (2) to design and fabricate high-efficiency solar cells on promising low-cost materials, and (3) to improve the fundamental understanding of advanced photovoltaic devices. Several rapid and potentially low-cost technologies are described in this report that were developed and applied toward the fabrication of high-efficiency silicon solar cells.

ROHATGI,A.; NARASIMHA,S.; MOSCHER,J.; EBONG,A.; KAMRA,S.; KRYGOWSKI,T.; DOSHI,P.; RISTOW,A.; YELUNDUR,V.; RUBY,DOUGLAS S.

2000-05-01T23:59:59.000Z

385

Solar system having improved heliostat and sensor mountings  

SciTech Connect (OSTI)

This specification discloses an improvement in a solar system having one or more collectors for receiving and using radiant energy from the sun and at least one and preferably a plurality of respective reflector means for reflecting the radiant energy onto the collectors. The improvement is characterized by having each reflector in the form of a heliostat that can be moved to maximize the radiant energy reflected onto its collector, driving motor for so moving each heliostat; firmly anchored support structure carrying each heliostat; and sensor connected by suitable controls with each drive motor for so moving each heliostat; the respective sensor being mounted on the same support structure as the heliostat and aligned in a straight line from the heliostat to its collector. With this construction, the sensor does not require an expensive and firmly anchored separate support structure to prevent receiving small surface movements different from those received by the heliostat.

Blake, F.A.; Northrup, L.L.

1980-10-14T23:59:59.000Z

386

NANOSTRUCTURED SOLAR CELLS FOR HIGH EFFICIENCY PHOTOVOLTAICS Christiana B. Honsberg1  

E-Print Network [OSTI]

for solar energy conversion. NANOSTRUCTURED SOLAR CELLS Nanostructured solar cells offer several advantages to contribute to high efficiency devices NEW CONCEPTS FOR SOLAR CELLS An important advantage for nanostructuredNANOSTRUCTURED SOLAR CELLS FOR HIGH EFFICIENCY PHOTOVOLTAICS Christiana B. Honsberg1 , Allen M

Honsberg, Christiana

387

Engineering Metal Impurities in Multicrystalline Silicon Solar Cells  

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

Engineering Metal Impurities in Multicrystalline Silicon Solar Cells Print Engineering Metal Impurities in Multicrystalline Silicon Solar Cells Print Transition metals are one of the main culprits in degrading the efficiency of multicrystalline solar cells. With a suite of x-ray microprobe techniques, a multi-institutional collaboration led by researchers from the University of California, Berkeley, and Berkeley Lab studied the distribution of metal clusters in a variety of multicrystalline solar cells before and after processing. Their discovery that the size, spatial distribution, and chemical binding of metals within clusters is just as important as the total metal concentration in limiting the performance of multicrystalline silicon solar cells led to the concept of defect engineering by optimizing growth and processing sequences to trap metals in their least harmful state.

388

High-Efficiency Solar Cell Concepts: Physics, Materials, and Devices  

SciTech Connect (OSTI)

Over the past three decades, significant progress has been made in the area of high-efficiency multijunction solar cells, with the effort primarily directed at current-matched solar cells in tandem. The key materials issues here have been obtaining semiconductors with the required bandgaps for sequential absorption of light in the solar spectrum and that are lattice matched to readily available substrates. The GaInP/GaAs/Ge cell is a striking example of success achieved in this area. Recently, several new approaches for high-efficiency solar cell design have emerged, that involve novel methods for tailoring alloy bandgaps, as well as alternate technologies for hetero-epitaxy of III-V's on Si. The advantages and difficulties expected to be encountered with each approach will be discussed, addressing both the materials issues and device physics whilst contrasting them with other fourth-generation solar cell concepts.

Mascarenhas, A.; Francoeur, S.; Seong, M. J.; Fluegel, B.; Zhang, Y.; Wanlass, M. W.

2005-01-01T23:59:59.000Z

389

Engineering Metal Impurities in Multicrystalline Silicon Solar Cells  

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

Engineering Metal Impurities in Multicrystalline Silicon Solar Cells Print Engineering Metal Impurities in Multicrystalline Silicon Solar Cells Print Transition metals are one of the main culprits in degrading the efficiency of multicrystalline solar cells. With a suite of x-ray microprobe techniques, a multi-institutional collaboration led by researchers from the University of California, Berkeley, and Berkeley Lab studied the distribution of metal clusters in a variety of multicrystalline solar cells before and after processing. Their discovery that the size, spatial distribution, and chemical binding of metals within clusters is just as important as the total metal concentration in limiting the performance of multicrystalline silicon solar cells led to the concept of defect engineering by optimizing growth and processing sequences to trap metals in their least harmful state.

390

Improving Solar Dryers’ Performances Using Design and Thermal Heat Storage  

Science Journals Connector (OSTI)

Solar drying is one of the most important ... , at the same time as using free solar energy permits to reduce the cost of ... face or to limit the intermittent character of solar energy, storage is proposed as a ...

Lyes Bennamoun

2013-12-01T23:59:59.000Z

391

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

392

Solar cells incorporating light harvesting arrays  

DOE Patents [OSTI]

A solar cell incorporates a light harvesting array that comprises: (a) a first substrate comprising a first electrode; and (b) a layer of light harvesting rods electrically coupled to the first electrode, each of the light harvesting rods comprising a polymer of Formula I: X.sup.1.paren open-st.X.sup.m+1).sub.m (I) wherein m is at least 1, and may be from two, three or four to 20 or more; X.sup.1 is a charge separation group (and preferably a porphyrinic macrocycle, which may be one ligand of a double-decker sandwich compound) having an excited-state of energy equal to or lower than that of X.sup.2 ; and X.sup.2 through X.sup.m+1 are chromophores (and again are preferably porphyrinic macrocycles).

Lindsey, Jonathan S. (Raleigh, NC); Meyer, Gerald J. (Baltimore, MD)

2002-01-01T23:59:59.000Z

393

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

394

Passive cooling of concentrated solar cells using phase change material thermal storage.  

E-Print Network [OSTI]

??High solar cell temperature has always been a major concern when designing a concentrated solar power (CSP) system. Exceeding the operational cell temperature can result… (more)

Tan, L

2013-01-01T23:59:59.000Z

395

E-Print Network 3.0 - aluminium arsenide solar cells Sample Search...  

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

manufacturing technique holds Summary: arsenide chips manufactured in multilayer stacks: light sensors, high-speed transistors and solar cells... the photovoltaic cells that solar...

396

Solar Energy Materials & Solar Cells 58 (1999) 199}208 The behaviour of Na implanted into Mo thin "lms  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 58 (1999) 199}208 The behaviour of Na implanted into Mo thin, As ngstro( m Solar Center, P.O. Box 534, SE-751 21 Uppsala, Sweden Department of Materials Science Mo thin "lms used as back contacts for Cu(In,Ga)Se solar cells. The samples were analysed

Rockett, Angus

397

Pennsylvania Company Develops Solar Cell Printing Technology | Department  

Broader source: Energy.gov (indexed) [DOE]

Pennsylvania Company Develops Solar Cell Printing Technology Pennsylvania Company Develops Solar Cell Printing Technology Pennsylvania Company Develops Solar Cell Printing Technology April 15, 2010 - 4:20pm Addthis Joshua DeLung What does this project do? The technology uses Plextronics' conductive inks that can be printed by manufacturers worldwide to make solar cells, potentially as easily as they might print a newspaper. This method is much less expensive than many others in terms of raw materials and manufacturing costs. Pittsburgh-based Plextronics, plans to commercialize low-cost solar power globally with its conductive ink technologies, a goal that has been helped by a government incubator program focused on finding marketable prototypes by 2012. "For any technology to be truly successful, you have to enable a new

398

Photo of the Week: Butterflies, Crystal Nanostructures and Solar Cell  

Broader source: Energy.gov (indexed) [DOE]

Butterflies, Crystal Nanostructures and Solar Butterflies, Crystal Nanostructures and Solar Cell Research Photo of the Week: Butterflies, Crystal Nanostructures and Solar Cell Research October 26, 2012 - 11:44am Addthis What do butterflies and solar cell research have in common? Both have been developing tiny crystals that selectively reflect colors. Over millions of years of evolution, butterfly wings have developed the tiny crystal nanostructures that give butterflies their vivid colors. At Argonne National Laboratory, scientists are working to manufacture these crystals, which could one day be used to create "greener" and more efficient paints, fiber optics and solar cells. In this photo, the iridescent scales of an emerald-patched Cattleheart butterfly are magnified 20 times to highlight the crystals that selectively reflect green colors. | Photo courtesy of Argonne National Laboratory.

399

Bright future for liquid electrolyte solar cells?  

Science Journals Connector (OSTI)

... development into a technology that could rival the more familiar solid-state p-n junction solar ...solarcells ...

A. Hamnett; S. Dennison

1982-12-23T23:59:59.000Z

400

Engineering: See-through solar cells  

Science Journals Connector (OSTI)

... windows of houses and skyscrapers could one day be harvested thanks to the creation of solar ...solarcells ...

2011-05-25T23:59:59.000Z

Note: This page contains sample records for the topic "improved solar cells" 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

Enhanced performance of solar cells with optimized surface recombination and efficient photon capturing via anisotropic-etching of black silicon  

SciTech Connect (OSTI)

We report an enhanced conversion efficiency of femtosecond-laser treated silicon solar cells by surface modification of anisotropic-etching. The etching improves minority carrier lifetime inside modified black silicon area substantially; moreover, after the etching, an inverted pyramids/upright pyramids mixed texture surface is obtained, which shows better photon capturing capability than that of conventional pyramid texture. Combing of these two merits, the reformed solar cells show higher conversion efficiency than that of conventional pyramid textured cells. This work presents a way for fabricating high performance silicon solar cells, which can be easily applied to mass-production.

Chen, H. Y.; Peng, Y., E-mail: gdyuan@semi.ac.cn, E-mail: py@usst.edu.cn; Hong, M.; Zhang, Y. B.; Cai, Bin; Zhu, Y. M. [Shanghai Key Lab of Modern Optical System and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for Science and Technology, Shanghai 200093 (China); Yuan, G. D., E-mail: gdyuan@semi.ac.cn, E-mail: py@usst.edu.cn; Zhang, Y.; Liu, Z. Q.; Wang, J. X.; Li, J. M. [Semiconductor Lighting R and D Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China)

2014-05-12T23:59:59.000Z

402

Performance of Ultra High Efficiency Thin Germanium P-N Junction Solar Cells Intended for Solar Thermophotovoltaic Application  

Science Journals Connector (OSTI)

The theoretical upper limit conversion efficiency as a function of cell thickness and ... is calculated for a germanium p-n junction solar cell intended for solar thermophotovoltaic energy conversion which incorp...

E. S. Vera; J. J. Loferski; M. Spitzer…

1981-01-01T23:59:59.000Z

403

Solar Energy Materials & Solar Cells 91 (2007) 17261732 Optical and structural properties of Ta2O5CeO2 thin films  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 91 (2007) 1726­1732 Optical and structural properties of Ta2O5

Thirumalai, Devarajan

404

Phase-change materials to improve solar panel's performance Pascal Biwole1,2,*  

E-Print Network [OSTI]

-change materials to improve solar panel's performance Pascal Biwole1,2,* , Pierre Eclache3 , Frederic Kuznik3 1-mail:phbiwole@unice.fr Abstract: High operating temperatures induce a loss of efficiency in solar photovoltaic and thermal panels set-up. Results show that adding a PCM on the back of a solar panel can maintain the panel

405

The Shockley-Queisser limit for nanostructured solar cells  

E-Print Network [OSTI]

The Shockley-Queisser limit describes the maximum solar energy conversion efficiency achievable for a particular material and is the standard by which new photovoltaic technologies are compared. This limit is based on the principle of detailed balance, which equates the photon flux into a device to the particle flux (photons or electrons) out of that device. Nanostructured solar cells represent a new class of photovoltaic devices, and questions have been raised about whether or not they can exceed the Shockley-Queisser limit. Here we show that single-junction nanostructured solar cells have a theoretical maximum efficiency of 42% under AM 1.5 solar illumination. While this exceeds the efficiency of a non- concentrating planar device, it does not exceed the Shockley-Queisser limit for a planar device with optical concentration. We conclude that nanostructured solar cells offer an important route towards higher efficiency photovoltaic devices through a built-in optical concentration.

Xu, Yunlu; Munday, Jeremy N

2014-01-01T23:59:59.000Z

406

Effective Panchromatic Sensitization of Electrochemical Solar Cells: Strategy and Organizational Rules for Spatial Separation of  

E-Print Network [OSTI]

Effective Panchromatic Sensitization of Electrochemical Solar Cells: Strategy and Organizational efficiencies. In only a few cases, however, have significant overall improvements been obtained. In most other (JSC = 14.6 mA cm-2 ) and double the efficiency of randomly mixed dyes, once the dyes were optimally

407

INITIAL TEST BED FOR VERY HIGH EFFICIENCY SOLAR CELLS Allen Barnett  

E-Print Network [OSTI]

multiple benefits, including increased theoretical efficiency, new architectures that circumvent material/cost choices. An integrated optical/solar cell allows efficiency improvements while retaining low area costs, multiple-junction III-Vs for the high and low energy photons while circumventing existing cost drivers

Honsberg, Christiana

408

Method for forming 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)

1984-03-13T23:59:59.000Z

409

Fully Solution-Processed Copper Chalcopyrite Thin Film Solar Cells: Materials Chemistry, Processing, and Device Physics  

E-Print Network [OSTI]

energy sources, the potential of solar energy is the mostuse of solar cells as an energy source [2]. Therefore, thinspread use of solar cells as a renewable energy source [2].

Chung, Choong-Heui

2012-01-01T23:59:59.000Z

410

Preparation Of Copper Indium Gallium Diselenide Films For Solar Cells  

DOE Patents [OSTI]

High quality thin films of copper-indium-gallium-diselenide useful in the production of solar cells are prepared by electrodepositing at least one of the constituent metals onto a glass/Mo substrate, followed by physical vapor deposition of copper and selenium or indium and selenium to adjust the final stoichiometry of the thin film to approximately Cu(In,Ga)Se.sub.2. Using an AC voltage of 1-100 KHz in combination with a DC voltage for electrodeposition improves the morphology and growth rate of the deposited thin film. An electrodeposition solution comprising at least in part an organic solvent may be used in conjunction with an increased cathodic potential to increase the gallium content of the electrodeposited thin film.

Bhattacharya, Raghu N. (Littleton, CO); Contreras, Miguel A. (Golden, CO); Keane, James (Lakewood, CO); Tennant, Andrew L. (Denver, CO), Tuttle, John R. (Denver, CO); Ramanathan, Kannan (Lakewood, CO); Noufi, Rommel (Golden, CO)

1998-08-08T23:59:59.000Z

411

Depleted-Heterojunction Colloidal Quantum Dot Solar Cells  

E-Print Network [OSTI]

Depleted-Heterojunction Colloidal Quantum Dot Solar Cells Andras G. Pattantyus-Abraham,, Illan J and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada-circuit voltage (Voc) and fill factor (FF). The power conversion efficiency ( ) for an in- put solar intensity

412

Current- and lattice-matched tandem solar cell  

DOE Patents [OSTI]

A multijunction (cascade) tandem photovoltaic solar cell device is fabricated of a Ga/sub x/In/sub 1-x/P (0.505 equal to or less than x equal to or less than 0.515) top cell semiconductor lattice-matched to a GaAs bottom cell semiconductor at a low resistance heterojunction, preferably a p/sup +//n/sup +/ heterojunction between the cells. The top and bottom cells are both lattice-matched and current-matched for high efficiency solar radiation conversion to electrical energy.

Olson, J.M.

1985-10-21T23:59:59.000Z

413

Project Profile: Solar Power Tower Improvements with the Potential...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

with its baseline solar tower configuration, which is well represented by the System Advisor Model template for a 100-MW solar tower. This mature system-level design is the...

414

Numerical simulations for high efficiency HIT solar cells using microcrystalline silicon as emitter and back surface field (BSF) layers  

Science Journals Connector (OSTI)

Abstract In present article the influence of thickness and band gap of microcrystalline silicon emitter layer, amorphous silicon front and back intrinsic layers and p-type crystalline silicon (c-Si) wafer thickness on the performance of TCO/?c-Si:H(n)/a-Si:H(i)/c-Si(p)/a-Si:H(i)/?c-Si:H(p+)/Ag Heterojunction with thin intrinsic layer (HIT) solar cell along with other structural possibilities were investigated through computer simulations using AFORS-HET software. These simulations revealed the importance of inclusion of intrinsic a-Si:H thin layer in improving the performance of solar cell with the help of interface passivation. Also microcrystalline BSF can raise the conversion efficiency more than 4% compared to HIT solar cell having no BSF layer. Highest stable efficiency of 24.12% for p-type substrate based HITBSF (HIT with back surface field) solar cells was observed. Furthermore the effect of textured transparent conductive oxide (TCO) on solar cells was investigated where the enhanced light trapping was observed with the use of textured TCO surface which raised the performance of solar cells. These optimizations may help in fabricating ?c-Si emitter and BSF based HIT solar cells with stable efficiencies compared to possibly degraded efficiencies as in case of a-Si:H based HIT solar cell structures studied so far.

Arti Rawat; Mansi Sharma; Deepika Chaudhary; S. Sudhakar; Sushil Kumar

2014-01-01T23:59:59.000Z

415

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

416

Dispersion, Wave Propagation and Efficiency Analysis of Nanowire Solar Cells  

Science Journals Connector (OSTI)

We analyze the electromagnetic properties of InP/InAs nanowire solar cells for different geometries. We address both eigenvalue calculations to determine the wave propagation as well...

Kupec, J; Witzigmann, B

2009-01-01T23:59:59.000Z

417

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

418

Laser scribing of CIGS based thin films solar cells  

Science Journals Connector (OSTI)

Laser scribing tests on CIGS based thin films solar cells have been performed. The obtained high quality incisions show that laser scribing is a valuable tool for producing low-cost...

Sozzi, Michele; Menossi, Daniele; Bosio, Alessio; Cucinotta, Annamaria; Romeo, Nicola; Selleri, Stefano

419

GaAs solar cells close to the thermodynamic limit  

Science Journals Connector (OSTI)

The efficiency of GaAs solar cells can be increased by applying angularly selective filters. It is shown in terms of detailed balance model, why this happens and the concept is proven...

Hoehn, Oliver; Kraus, Tobias; Bauhuis, Gerard; Schwarz, Ulrich T; Bläsi, Benedikt

420

Morphology and Performance of Polymer-Based Solar Cells  

Science Journals Connector (OSTI)

Excitons in polymer-based solar cells are short lived placing great emphasis on construction of a nanoscale morphology of electron donor and acceptor. Here we discuss how processing...

Mackay, Michael E

Note: This page contains sample records for the topic "improved solar cells" from the National Library of EnergyBeta (NLEBeta).
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421

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

422

Holographic Thin Film System for Multijunction Solar Cells  

Science Journals Connector (OSTI)

The efficiency of photovoltaic generators based on different semiconductor materials with optimized band gaps can achieve considerably higher values than those obtained with single junction solar cells. For th...

W. H. Bloss; M. Griesinger; E. R. Reinhardt

1983-01-01T23:59:59.000Z

423

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

424

Putting together the full solar tandem cell | Center for Bio...  

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

Center Video Library Bisfuel Picture Gallery Putting together the full solar tandem cell 24 Oct 2012 Ben Sherman is a graduate student working in the Gust-Moore-Moore...

425

Simulation of iron impurity gettering in crystalline silicon solar cells  

E-Print Network [OSTI]

This work discusses the Impurity-to-Efficiency (12E) simulation tool and applet. The 12E simulator models the physics of iron impurity gettering in silicon solar cells during high temperature processing. The tool also ...

Powell, Douglas M. (Douglas Michael)

2012-01-01T23:59:59.000Z

426

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

427

Development of Inorganic Solar Cells by Nano-technology  

Science Journals Connector (OSTI)

Inorganic solar cells, as durable photovoltaic devices for harvesting electric energy from sun light, have received tremendous attention due to the fear of exhausting the earth’s energy resources and damaging ...

Yafei Zhang; Huijuan Geng; Zhihua Zhou; Jiang Wu; Zhiming Wang…

2012-06-01T23:59:59.000Z

428

New Wire Silicon Slicing Technology for Solar Cell  

Science Journals Connector (OSTI)

Firstly a prototype machine using Multicutting wire technology (MCWT) is described. The influence of ... and damaged layer are suitable for the present solar cell technology. Further decreasing cost steps are com...

H. Lauvray; A. Talpied; J. P. Besselere

1981-01-01T23:59:59.000Z

429

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

430

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

431

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

432

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

433

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

434

Requisites for Highly Efficient Hot-Carrier Solar Cells  

Science Journals Connector (OSTI)

We have constructed new models based on detailed balance of particle and energy fluxes to clarify the operating principle of hot-carrier solar cells (HC-SCs) and find the requisites for high conversion efficiency...

Yasuhiko Takeda

2014-01-01T23:59:59.000Z

435

High-Efficiency, Self-Concentrating Nanoscale Solar Cell - Energy...  

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

provided the right combination of high-efficiency and low-cost. For example, conventional solar cells are designed to absorb light through an antireflective layer, and through a...

436

NREL Invention Speeds Solar Cell Quality Testing for Industry  

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

Energy within the U.S. Department of Energy. QE is a measurement of how cells respond to light across the solar spectrum, but traditional methods for measuring QE had been too...

437

Light trapping limits in plasmonic solar cells: an analytical investigation  

E-Print Network [OSTI]

We analytically investigate the light trapping performance in plasmonic solar cells with Si/metallic structures. We consider absorption enhancements for surface plasmon polaritons (SPPs) at planar Si/metal interfaces and ...

Sheng, Xing

438

Efficient light trapping structure in thin film silicon solar cells  

E-Print Network [OSTI]

Thin film silicon solar cells are believed to be promising candidates for continuing cost reduction in photovoltaic panels because silicon usage could be greatly reduced. Since silicon is an indirect bandgap semiconductor, ...

Sheng, Xing

439

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...

440

Heterojunction for Multi-Junction Solar Cells - Energy Innovation...  

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

for use in forming a photodetector that has applications for use in a multi-junction solar cell and detecting light at an energy greater than 0.95-1.2 eV. DescriptionThis...

Note: This page contains sample records for the topic "improved solar cells" 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

Selenophene–Thiophene Block Copolymer Solar Cells with Thermostable Nanostructures  

Science Journals Connector (OSTI)

Selenophene–Thiophene Block Copolymer Solar Cells with Thermostable Nanostructures ... Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada ...

Dong Gao; Jon Hollinger; Dwight S. Seferos

2012-07-05T23:59:59.000Z

442

Mass production of high efficiency selective emitter crystalline silicon solar cells employing phosphorus ink technology  

Science Journals Connector (OSTI)

Abstract Phosphorus ink technology has been demonstrated as a simple and cheap method to realize selective emitter (SE) crystalline silicon solar cells through mass production in a professional photovoltaic company. We have achieved an average conversion efficiency (?) of 19.01% with peak ? of 19.27% for the SE solar cells based on commercial-grade p-type silicon substrate, much higher than that of the homogeneous emitter counterparts whose average ? is 18.56%. The standard deviation of the performance for these SE solar cells is also smaller, indicating better repeatability of the phosphorus ink SE technology. Moreover, the SE silicon solar cells can well adapt to various Ag pastes while preserving high cell performance, which offers an opportunity to choose a cheap Ag paste as front metallization material. With the aid of PC1D, we have shown that the ? of the SE solar cells can be further improved as the sheet resistance in the illuminated area increases from the present value of 70 to 120 ?/?.

Sihua Zhong; Wenzhong Shen; Feng Liu; Xiang Li

2013-01-01T23:59:59.000Z

443

Rational design of hybrid dye-sensitized solar cells composed of double-layered photoanodes with  

E-Print Network [OSTI]

tandem solar cells, leading to higher power conversion efficiency. Dye-sensitized solar cells (DSSCs based solar cells.2�12 Different methods have been adopted to realize better power conversion efficiency energy, leading to low efficiency. Yamaguchi et al. fabricated tandem dye-sensitized solar cells

Lin, Zhiqun

444

Configuration Optimization of a Nanosphere Array on Top of a Thin Film Solar Cell  

E-Print Network [OSTI]

Configuration Optimization of a Nanosphere Array on Top of a Thin Film Solar Cell J. Grandidier on top of a solar cell can enhance light absorption and therefore increase its efficiency. Freely photocurrent of the solar cell. On a typical thin film amorphous silicon solar cell, a parametric analysis

Atwater, Harry

445

Design of Nanostructured Solar Cells Using Coupled Optical and Electrical Modeling  

E-Print Network [OSTI]

solar   cells:   modeling,   materials  and  device  technology.  Kluwer  Academic  Publishers:  Norwell,  Massachusetts  

Deceglie, Michael G

2014-01-01T23:59:59.000Z

446

RANDOM DEPOSITION MODEL OF CDS LAYER IN CDS/CDTE THINFILM SOLAR CELLS  

E-Print Network [OSTI]

THESIS RANDOM DEPOSITION MODEL OF CDS LAYER IN CDS/CDTE THIN­FILM SOLAR CELLS Submitted by Lei Chen LAYER IN CDS/CDTE THIN­FILM SOLAR CELLS BE AC- CEPTED AS FULFILLING IN PART REQUIREMENTS FOR THE DEGREE MODEL OF CDS LAYER IN CDS/CDTE THIN­FILM SOLAR CELLS Thin­film solar cells are developing dramatically

Sites, James R.

447

DISSERTATION ELECTRON-REFLECTOR STRATEGY FOR CdTe THIN-FILM SOLAR CELLS  

E-Print Network [OSTI]

DISSERTATION ELECTRON-REFLECTOR STRATEGY FOR CdTe THIN-FILM SOLAR CELLS Submitted by Kuo-Jui Hsiao ELECTRON- REFLECTOR STRATEGY FOR CdTe THIN-FILM SOLAR CELLS BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS SOLAR CELLS The CdTe thin-film solar cell has a large absorption coefficient and high theoretical

Sites, James R.

448

DISSERTATION DEVICE PHYSICS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS  

E-Print Network [OSTI]

DISSERTATION DEVICE PHYSICS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS Submitted by Markus Gloeckler PHYSICS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS Thin-film solar cells have the potential to be an important

Sites, James R.

449

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

450

An investigation of solar radiation induced cell death in a human keratinocyte cell line  

Science Journals Connector (OSTI)

...Molecular Biology 64: Cell Death Regulators...investigation of solar radiation induced cell death in a human...Dublin Institute of Technology, Dublin, Ireland...basal and squamous cell carcinomas) accounting...radiation from non-solar type UV lamp sources...

Alanna Maguire; James Walsh; and Fiona M. Lyng

2006-04-15T23:59:59.000Z

451

Silicon solar cells made by a self-aligned, selective-emitter, plasma-etchback process  

DOE Patents [OSTI]

A potentially low-cost process for forming and passivating a selective emitter. The process uses a plasma etch of the heavily doped emitter to improve its performance. The grids of the solar cell are used to mask the plasma etch so that only the emitter in the region between the grids is etched, while the region beneath the grids remains heavily doped for low contact resistance. This process is potentially low-cost because it requires no alignment. After the emitter etch, a silicon nitride layer is deposited by plasma-enhanced, chemical vapor deposition, and the solar cell is annealed in a forming gas.

Ruby, Douglas S. (Albuquerque, NM); Schubert, William K. (Albuquerque, NM); Gee, James M. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

452

Silicon solar cells made by a self-aligned, selective-emitter, plasma-etchback process  

DOE Patents [OSTI]

A potentially low-cost process for forming and passivating a selective emitter. The process uses a plasma etch of the heavily doped emitter to improve its performance. The grids of the solar cell are used to mask the plasma etch so that only the emitter in the region between the grids is etched, while the region beneath the grids remains heavily doped for low contact resistance. This process is potentially low-cost because it requires no alignment. After the emitter etch, a silicon nitride layer is deposited by plasma-enhanced, chemical vapor deposition, and the solar cell is annealed in a forming gas. 5 figs.

Ruby, D.S.; Schubert, W.K.; Gee, J.M.

1999-02-16T23:59:59.000Z

453

One-sun, single-crystalline silicon solar cell research  

SciTech Connect (OSTI)

The point-contact solar cell design, the most efficient silicon concentrator solar cell design to date, is explored for use in one-sun applications. The necessary modifications to backside-contact concentrator cell design for operation at one-sun are explored and implemented. Large-area, point-contact solar cells were fabricated on n- and p-type substrates in low-level injection (LLI). The characteristics of these LLI cells were compared to those of four different architectures of cells with substrates in high-level injection (HLI). Both types of cell achieved open-circuit voltages over 700 mV at one-sun, LLI cells had higher fill factors, and HLI cells had substantially higher short-circuit currents. The mechanisms responsible for these observations are discussed. The high V{sub oc} and J{sub sc} of the HLI cells combine to make them more efficient than the LLI cells, with efficiencies measured at Sandia up to 22.7% for a 37.5-cm{sup 2} cell at one sun. This is the highest one-sun efficiency for a silicon cell larger than 4 cm{sup 2}. Simplified, backside-contact solar cell processes were also developed, which have nearly 100% yield. Over 80 such cells, each with a 35-cm{sup 2} area or greater, were delivered to Sandia. Cells made with these simplified processes had efficiencies up to 21.3% for a 37.5-cm{sup 2} cell. The recombination properties of Si{sub 3}N{sub 4} layers over SiO{sub 2} were characterized, since Si{sub 3}N{sub 4} is an excellent antireflection coating for cells laminated under glass. Several prototype flat-plate modules of backside-contact cells were built, with up to 24 cells and efficiencies up to 19%. 26 refs., 16 figs., 4 tabs.

King, R.R.; Sinton, R.A.; Swanson, R.M. (Stanford Univ., CA (USA). Solid-State Electronics Lab.)

1991-06-01T23:59:59.000Z

454

Solar/hydrogen fuel cell car crosses Australia  

Science Journals Connector (OSTI)

A team of students from Tamagawa University in Tokyo have become the first people to cross Australia in a solar hydrogen-powered vehicle, which runs on a combination of solar cells and fuel cells. The engineering students – led by Professor Hiroyuki Obara – left the University of Western Australia in Perth in their Apollondine vehicle on December 19, and travelled 4084 km (2538 miles) to Sydney in just eight days.

2004-01-01T23:59:59.000Z

455

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

456

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)

457

Engineering Schottky Contacts in Open-Air Fabricated Heterojunction Solar Cells to Enable High Performance and Ohmic Charge Transport  

E-Print Network [OSTI]

Te Solar Cells. Thin Solid Films 2006, 510, 320?324. (2) Chuang, C.-H. M.; Brown, P. R.; Bulovic,? V.; Bawendi, M. G. Improved Performance and Stability in Quantum Dot Solar Cells through Band Alignment Engineering. Nat. Mater. 2014, 13, 796?801. (3) Marin... . Mater. 2010, 22, E254?E258. (10) Sarkar, K.; Braden, E. V.; Pogorzalek, S.; Yu, S.; Roth, S. V.; Mu?ller-Buschbaum, P. Monitoring Structural Dynamics of in Situ Spray-Deposited Zinc Oxide Films for Application in Dye-Sensitized Solar Cells. Chem...

Hoye, Robert L. Z.; Heffernan, Shane; Ievskaya, Yulia; Sadhanala, Aditya; Flewitt, Andrew; Friend, Richard H.; MacManus-Driscol, Judith L.; Musselman, Kevin P.

2014-11-24T23:59:59.000Z

458

Photo of the Week: Record-Breaking Solar Cells | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Photo of the Week: Record-Breaking Solar Cells Photo of the Week: Record-Breaking Solar Cells Photo of the Week: Record-Breaking Solar Cells December 7, 2012 - 2:27pm Addthis Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography tool used to manufacture these solar cells. | Photo by Daniel Derkacs/SolarJunction. Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography

459

Photo of the Week: Record-Breaking Solar Cells | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Record-Breaking Solar Cells Record-Breaking Solar Cells Photo of the Week: Record-Breaking Solar Cells December 7, 2012 - 2:27pm Addthis Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography tool used to manufacture these solar cells. | Photo by Daniel Derkacs/SolarJunction. Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography

460

Quantum-Dot Intermediate-Band Solar Cells with Inverted Band Alignment  

SciTech Connect (OSTI)

The intermediate-band concept was proposed over a decade ago as a possible route to increase the efficiency of single-junction solar cells. Despite a number of experimental attempts to realize this concept, no efficiency improvement over conventional single-junction solar cells has so far been demonstrated. This is likely due to the fact that the intermediate band itself acts to enhance electron-hole recombination. In this work we propose a novel intermediate-band solar-cell architecture based on doped semiconductor nanostructures having an inverted type-I band alignment with the surrounding host. The recombination of carriers in the nanostructures is prevented by ultra-fast charge transfer to the host, thereby removing the main obstacle to achieve high conversion efficiency.

Francheschetti, A.; Lany, S.; Bester, G.

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improved solar cells" 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

High open circuit voltages of solar cells based on quantum dot and dye hybrid-sensitization  

SciTech Connect (OSTI)

A type of solar cell based on quantum dot (QD) and dye hybrid-sensitized mesoporous TiO{sub 2} film electrode was designed and reported. The electrode was consisted of a TiO{sub 2} nanoparticle (NP) thin film layer sensitized with CdS quantum dot (QD) and an amorphous TiO{sub 2} coated TiO{sub 2} NP thin film layer that sensitized with C106 dye. The amorphous TiO{sub 2} layer was obtained by TiCl{sub 4} post-treatment to improve the properties of solar cells. Research showed that the solar cells fabricated with as-prepared hybrid-sensitized electrode exhibited excellent photovoltaic performances and a fairly high open circuit voltage of 796?mV was achieved.

Zhao, Yujie; Zhao, Wanyu; Chen, Jingkuo; Li, Huayang; Fu, Wuyou, E-mail: hari@hpu.edu.cn, E-mail: fuwy56@163.com; Sun, Guang; Cao, Jianliang; Zhang, Zhanying [School of Materials Science and Engineering and Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000 (China)] [School of Materials Science and Engineering and Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000 (China); Bala, Hari, E-mail: hari@hpu.edu.cn, E-mail: fuwy56@163.com [School of Materials Science and Engineering and Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000 (China) [School of Materials Science and Engineering and Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000 (China); College of Chemistry and Chemical Engineering, Inner Mongolia University for the Nationalities, Tongliao 028043 (China)

2014-01-06T23:59:59.000Z

462

A review on plasma-assisted VLS synthesis of silicon nanowires and radial junction solar cells  

Science Journals Connector (OSTI)

Incorporation of nanostructures is a recent trend in the photovoltaic community, aimed at improving light absorption and consequently cell efficiency. In this regard, semiconductor nanowires provide an attractive research platform for a new generation of cost-effective and efficient solar cells. Thanks to their unique geometry, silicon nanowires enhance light trapping and anti-reflection effects by means of multiple scattering between individual nanowires, and by coupling the light into confined eigenmodes over a broad range of the solar spectrum. Moreover, radial junction solar cells built around nanowires decouple the light absorption and carrier collection directions, which allows for a higher internal field and better carrier collection. Thus, arrays of radial junction solar cells bring advantages of high efficiency with reduced material amount. This is particularly attractive for devices based on hydrogenated amorphous and microcrystalline silicon thin films. In this paper, after reviewing different approaches to fabricate silicon nanowires, we focus on nanowires grown using the plasma-assisted vapour–liquid–solid method because of the simplicity and compatibility with current silicon thin-film technology. Their application to a-Si?:?H based radial junction solar cells has already resulted in ~8% of stable devices with an absorber layer thickness of only 100 nm. Moreover, current challenges and perspectives such as the use of a microcrystalline silicon absorber are also reviewed.

Soumyadeep Misra; Linwei Yu; Wanghua Chen; Martin Foldyna; Pere Roca i Cabarrocas

2014-01-01T23:59:59.000Z

463

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

464

Solar Cells, Wound Repair Winning GVC Technologies | ornl.gov  

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

Solar Cells, Wound Repair Winning GVC Technologies Solar Cells, Wound Repair Winning GVC Technologies March 26, 2010 Graduate student teams from the University of Arkansas and the University of Maryland earned first place in the energy and security categories at the 2010 GVC hosted by ORNL March 24-26. The competition, in its fourth year, attracts students developing new technologies and venture investors with expertise in the market. The first-prize winners each received $25,000. Douglas Hutchings, Stephen Ritterbush, and Seth Shumate from Arkansas won first place in the energy division for Silicon Solar Solutions. "Our method replaces the expensive top layer of solar cells with a thinner, large-grain polysilicon at lower temperatures, which reduces cost and is appealing to manufacturers," said Ritterbush.

465

Monolithically interconnected GaAs solar cells: A new interconnection technology for high voltage solar cell output  

SciTech Connect (OSTI)

Photovoltaic linear concentrator arrays can benefit from high performance solar cell technologies being developed at AstroPower. Specifically, these are the integration of thin GaAs solar cell and epitaxial lateral overgrowth technologies with the application of monolithically interconnected solar cell (MISC) techniques. This MISC array has several advantages which make it ideal for space concentrator systems. These are high system voltage, reliable low cost monolithically formed interconnections, design flexibility, costs that are independent of array voltage, and low power loss from shorts, opens, and impact damage. This concentrator solar cell will incorporate the benefits of light trapping by growing the device active layers over a low-cost, simple, PECVD deposited silicon/silicon dioxide Bragg reflector. The high voltage-low current output results in minimal 12R losses while properly designing the device allows for minimal shading and resistance losses. It is possible to obtain open circuit voltages as high as 67 volts/cm of solar cell length with existing technology. The projected power density for the high performance device is 5 kW/m for an AMO efficiency of 26% at 1 5X. Concentrator solar cell arrays are necessary to meet the power requirements of specific mission platforms and can supply high voltage power for electric propulsion systems. It is anticipated that the high efficiency, GaAs monolithically interconnected linear concentrator solar cell array will enjoy widespread application for space based solar power needs. Additional applications include remote man-portable or ultra-light unmanned air vehicle (UAV) power supplies where high power per area, high radiation hardness and a high bus voltage or low bus current are important. The monolithic approach has a number of inherent advantages, including reduced cost per interconnect and increased reliability of array connections. There is also a high potential for a large number of consumer products.

Dinetta, L.C.; Hannon, M.H.

1995-10-01T23:59:59.000Z

466

24th European Photovoltaic Solar Energy Conference, Hamburg, Germany, Sept. 2009 THE BURIED EMITTER SOLAR CELL CONCEPT  

E-Print Network [OSTI]

of 79.8% indicates that trap-assisted tunneling is not a relevant loss mechanism of this solar cell24th European Photovoltaic Solar Energy Conference, Hamburg, Germany, Sept. 2009 1 THE BURIED EMITTER SOLAR CELL CONCEPT: INTERDIGITATED BACK-JUNCTION STRUCUTRE WITH VIRTUALLY 100% EMITTER COVERAGE

467

Solar Power in the Desert: Are the current large-scale solar developments really improving California’s environment?  

E-Print Network [OSTI]

expectancy of a thermal solar energy development? A commontowards solar energy: Photovoltaic vs Solar Thermal. In:

Allen, Michael F.; McHughen, Alan

2011-01-01T23:59:59.000Z

468

Low-cost, Efficient, Flexible Solar Cells with 3D Nanopillar...  

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

Photovoltaic Solar Photovoltaic Find More Like This Return to Search Low-cost, Efficient, Flexible Solar Cells with 3D Nanopillar Arrays Lawrence Berkeley National Laboratory...

469

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

E-Print Network [OSTI]

??Stability and reliability of solar cells are crucial for utilizing them for solar energy technology. In this dissertation work photothermal deflection spectroscopy (PDS) technique was… (more)

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

470

Fabrication of ultra thin CdS/CdTe solar cells by magnetron sputtering.  

E-Print Network [OSTI]

?? CdTe is a nearly perfect absorber material for second generation polycrystalline solar cells because the bandgap closely matches the peak of the solar spectrum,… (more)

Plotnikov, Victor

2009-01-01T23:59:59.000Z

471

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

472

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

E-Print Network [OSTI]

Roadmaps. Solar photovoltaic energy”, IEA, (Corlet, France,no longer showed any photovoltaic energy conversion. With 1Photovoltaic (PV) cells convert solar energy (photons) into

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

473

New solar cell technology captures high-energy photons more efficientl...  

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

spectrum inefficiently. This is because blue photons - incoming particles of light that strike the solar cell - actually have excess energy that a conventional solar...

474

E-Print Network 3.0 - alingap solar cell Sample Search Results  

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

Solar Radiation Monitoring Laboratory Summary: an electrical current when illuminated by light- also called a solar cell Photovoltaic Module A group... produced when plotting...

475

Assembly and characterization of colloid-based antireflective coatings on multicrystalline silicon solar cells  

E-Print Network [OSTI]

make them superhydrophobic and/or self-cleaning. 1 Introduction Photovoltaic (PV) devices such as solar solar cells Brian G. Prevo,{ Emily W. Hon and Orlin D. Velev* Received 4th September 2006, Accepted 10th solar cells. The nanocoatings reduced the reflectance of the solar cells by approximately 10% across

Velev, Orlin D.

476

Light trapping in solar cells at the extreme coupling limit Ali Naqavi,1,2,  

E-Print Network [OSTI]

Light trapping in solar cells at the extreme coupling limit Ali Naqavi,1,2, * Franz-Josef Haug,1.1950, 130.2790. 1. INTRODUCTION Enhancing light absorption in solar cells has been a topic of research to enhance absorption in the solar cells and the extent to which they can increase light absorption in solar

Petitpierre, Claude

477

CARRIER COLLECTION IN THIN-FILM CDTE SOLAR CELLS: THEORY AND EXPERIMENT  

E-Print Network [OSTI]

-n junction solar cell theory predicts that the total solar cell current in the light, JLCARRIER COLLECTION IN THIN-FILM CDTE SOLAR CELLS: THEORY AND EXPERIMENT A.E. Delahoy, Z. Cheng and K.K. Chin Department of Physics, Apollo Solar Energy Research Center, New Jersey Institute

478

ORIGINAL ARTICLE Highly efficient GaAs solar cells by limiting light emission  

E-Print Network [OSTI]

ORIGINAL ARTICLE Highly efficient GaAs solar cells by limiting light emission angle Emily D Kosten1 solar cell under direct sunlight, light is received from the solar disk, but is re-emitted isotropically.1038/lsa.2013.1; published online 4 January 2013 Keywords: detailed balance; GaAs solar cell; light

Atwater, Harry

479

1. INTRODUCTION Polycrystalline CdTe thin films solar cells have shown long  

E-Print Network [OSTI]

to the solar panel that can be adapted to any kind of shape and is easy to deploy in space. We have developed1. INTRODUCTION Polycrystalline CdTe thin films solar cells have shown long term stable performance for the solar cell, therefore high specific power (ratio of out- put power to the weight) solar cells

Romeo, Alessandro

480

Development of an electronic device quality aluminum antimonide (AlSb) semiconductor for solar cell applications  

DOE Patents [OSTI]

Electronic device quality Aluminum Antimonide (AlSb)-based single crystals produced by controlled atmospheric annealing are utilized in various configurations for solar cell applications. Like that of a GaAs-based solar cell devices, the AlSb-based solar cell devices as disclosed herein provides direct conversion of solar energy to electrical power.

Sherohman, John W; Yee, Jick Hong; Combs, III, Arthur W

2014-11-11T23:59:59.000Z

Note: This page contains sample records for the topic "improved solar cells" 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.


481

Multi-phase back contacts for CIS solar cells  

DOE Patents [OSTI]

Multi-phase, single layer, non-interdiffusing M-Mo back contact metallized films, where M is selected from Cu, Ga, or mixtures thereof, for CIS cells are deposited by a sputtering process on suitable substrates, preferably glass or alumina, to prevent delamination of the CIS from the back contact layer. Typical CIS compositions include CuXSe.sub.2 where X is In or/and Ga. The multi-phase mixture is deposited on the substrate in a manner to provide a columnar microstructure, with micro-vein Cu or/and Ga regions which partially or fully vertically penetrate the entire back contact layer. The CIS semiconductor layer is then deposited by hybrid sputtering and evaporation process. The Cu/Ga-Mo deposition is controlled to produce the single layer two-phase columnar morphology with controllable Cu or Ga vein size less than about 0.01 microns in width. During the subsequent deposition of the CIS layer, the columnar Cu/Ga regions within the molybdenum of the Cu/Ga-Mo back layer tend to partially leach out, and are replaced by columns of CIS. Narrower Cu and/or Ga regions, and those with fewer inner connections between regions, leach out more slowly during the subsequent CIS deposition. This gives a good mechanical and electrical interlock of the CIS layer into the Cu/Ga-Mo back layer. Solar cells employing In-rich CIS semiconductors bonded to the multi-phase columnar microstructure back layer of this invention exhibit vastly improved photo-electrical conversion on the order of 17% greater than Mo alone, improved uniformity of output across the face of the cell, and greater Fill Factor.

Rockett, Angus A. (505 Park Haven Ct., Champaign, IL 61820); Yang, Li-Chung (1107 W. Green St. #328, Urbana, IL 61801)

1995-01-01T23:59:59.000Z

482

Three dimensional amorphous silicon/microcrystalline silicon solar cells  

DOE Patents [OSTI]

Three dimensional deep contact amorphous silicon/microcrystalline silicon (a-Si/{micro}c-Si) solar cells are disclosed which use deep (high aspect ratio) p and n contacts to create high electric fields within the carrier collection volume material of the cell. The deep contacts are fabricated using repetitive pulsed laser doping so as to create the high aspect p and n contacts. By the provision of the deep contacts which penetrate the electric field deep into the material where the high strength of the field can collect many of the carriers, thereby resulting in a high efficiency solar cell. 4 figs.

Kaschmitter, J.L.

1996-07-23T23:59:59.000Z

483

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

484

Status, Technology and Development of Silicon Solar Cells at Iner  

Science Journals Connector (OSTI)

The current solar cells processing at INER are single crystal silicon with 1.2–2.8 ?-cm resistivity. They are thermal diffused n on p or p on n type cells with Ti/Pd/Ag metallization and Ta2O5 AR coating. Some wo...

S. S. Jao; H. H. Tseng; C. Cheng; Y. C. Tzeng…

1981-01-01T23:59:59.000Z

485

Solar Cells, 14 (1985) 289 -291 289 Short Communication  

E-Print Network [OSTI]

for CdS/CuInSe2 thin film solar cells by electron beam assisted chemical vapor deposition B. J. STANBERYSolar Cells, 14 (1985) 289 - 291 289 Short Communication Silicon nitride anti-reflection coatings; accepted January 2, 1985) The electron beam assisted chemical vapor deposition of silicon nitride anti

Rocca, Jorge J.

486

Doped surfaces in one sun, point-contact solar cells  

SciTech Connect (OSTI)

This letter reports two new types of large-area (>8.5 cm/sup 2/), backside, point-contact solar cells with doped surfaces, designed for use in unconcentrated sunlight. One type was fabricated on an intrinsic substrate with an optimized phosphorus diffusion on the sunward surface. The apertured-area efficiency was independently measured to be 22.3% at 1 sun (0.100 W/cm/sup 2/), 25 /sup 0/C, the highest reported for a silicon solar cell. The other type is constructed on a doped substrate, and has an apertured-area efficiency of 20.9%, the highest reported for a point-contact solar cell with a base in low-level injection. Both cells have record open-circuit voltages above 700 mV.

King, R.R.; Sinton, R.A.; Swanson, R.M.

1989-04-10T23:59:59.000Z

487

Influence of solar heating on the performance of integrated solar cell microstrip patch antennas  

SciTech Connect (OSTI)

The integration of microstrip patch antennas with photovoltaics has been proposed for applications in autonomous wireless communication systems located on building facades. Full integration was achieved using polycrystalline silicon solar cells as both antenna ground plane and direct current power generation in the same device. An overview of the proposed photovoltaic antenna designs is provided and the variation characterised of the electromagnetic properties of the device with temperature and solar radiation. Measurements for both copper and solar antennas are reported on three different commercial laminates with contrasting values for thermal coefficient of the dielectric constant. (author)

Roo-Ons, M.J.; Shynu, S.V.; Ammann, M.J. [Antenna and High Frequency Research Centre, School of Electronic and Communications Engineering, Dublin Institute of Technology (Ireland); Seredynski, M. [Institute of Heat Engineering, Warsaw University of Technology (Poland); McCormack, S.J. [Dept. of Civil, Structural and Environmental Engineering, Trinity College Dublin (Ireland); Norton, B. [Dublin Energy Lab., Focas Institute, Dublin Institute of Technology (Ireland)

2010-09-15T23:59:59.000Z

488

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

E-Print Network [OSTI]

as coal or oil. The photovoltaic cells which constitute mostand conventional inorganic photovoltaic cells is that lightand Characterization Photovoltaic (PV) cells convert solar

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

489

Core-Shell Nanopillar Array Solar Cells using Cadmium Sulfide Coating on Indium Phosphide Nanopillars  

E-Print Network [OSTI]

for efficient photovoltaic cells. ,” Nature Nanotechnology,Part II – Photovoltaic Cell I-V Characterization Theory andof the photovoltaic effect in the 19 th century, solar cells

Tu, Bor-An Clayton

2013-01-01T23:59:59.000Z

490

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.

491

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.

492

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.

493

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.

494

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.

495

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

496

Upside-Down Solar Cell Achieves Record Efficiencies (Fact Sheet)  

SciTech Connect (OSTI)

The inverted metamorphic multijunction (IMM) solar cell is an exercise in efficient innovation - literally, as the technology boasted the highest demonstrated efficiency for converting sunlight into electrical energy at its debut in 2005. Scientists at the National Renewable Energy Laboratory (NREL) inverted the conventional photovoltaic (PV) structure to revolutionary effect, achieving solar conversion efficiencies of 33.8% and 40.8% under one-sun and concentrated conditions, respectively.

Not Available

2010-12-01T23:59:59.000Z

497

Electron Transfer Dynamics in Efficient Molecular Solar Cells  

SciTech Connect (OSTI)

This research provided new mechanistic insights into surface mediated photochemical processes relevant to solar energy conversion. In this past three years our research has focused on oxidation photo-redox chemistry and on the role surface electric fields play on basic spectroscopic properties of molecular-semiconductor interfaces. Although this research as purely fundamental science, the results and their interpretation have relevance to applications in dye sensitized and photogalvanic solar cells as well as in the storage of solar energy in the form of chemical bonds.

Meyer, Gerald John

2014-10-01T23:59:59.000Z

498

INCREASED CELL EFFICIENCY IN InGaAs THIN FILM SOLAR CELLS WITH DIELECTRIC AND METAL BACK REFLECTORS  

E-Print Network [OSTI]

INCREASED CELL EFFICIENCY IN InGaAs THIN FILM SOLAR CELLS WITH DIELECTRIC AND METAL BACK REFLECTORS solar cells using back reflectors. We studied absorption enhancement in InGaAs and InGaAsP thin film and metal, on InGaAs thin film solar cell performance by device modeling and nu- merical simulations. DEVICE

Atwater, Harry

499

Impact of Improved Solar Forecasts on Bulk Power System Operations in ISO-NE: Preprint  

SciTech Connect (OSTI)

The diurnal nature of solar power is made uncertain by variable cloud cover and the influence of atmospheric conditions on irradiance scattering processes. Its forecasting has become increasingly important to the unit commitment and dispatch process for efficient scheduling of generators in power system operations. This study examines the value of improved solar power forecasting for the Independent System Operator-New England system. The results show how 25% solar power penetration reduces net electricity generation costs by 22.9%.

Brancucci Martinez-Anido, C.; Florita, A.; Hodge, B. M.

2014-09-01T23:59:59.000Z

500

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