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1

Nontoxic quantum dot research improves solar cells  

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

Nontoxic quantum dot research improves solar cells Nontoxic quantum dot research improves solar cells Solar cells made with low-cost, nontoxic copper-based quantum dots can achieve...

2

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 -...

3

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

4

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

5

Solar Energy Materials & Solar Cells 91 (2007) 15991610 Improving solar cell efficiency using photonic band-gap materials  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 91 (2007) 1599­1610 Improving solar cell efficiency using) solar energy conversion systems (or solar cells) are the most widely used power systems. However and reliable solar-cell devices is presented. We show that due their ability to modify the spectral and angular

Dowling, Jonathan P.

6

Improving Solar-Cell Efficiency  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinementEtching.348 270 300 219Improvements toProjectsImprovingHow to

7

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

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

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

10

Limiting Emission Angle for Improved Solar Cell  

E-Print Network [OSTI]

cooling, waste heat recovery and solar electricity generation, low values of the thermoelectric figure. Phase Transition Enhanced Thermoelectrics While thermoelectric materials can be used for solid state of merit, zT, have led to an efficiency too low for widespread use. Thermoelectric effects

11

Research highlights potential for improved solar cells  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStories »Submitter A B C D E F G H I JDefenseandPotential

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

Hydroxamate Anchors for Improved Photoconversion in Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

Hydroxamate Anchors for Improved Photoconversion in Dye- Sensitized Solar Cells Timothy P. Brewster-polypyridyl dyes to TiO2 surfaces in dye-sensitized solar cells (DSSCs). The study provides fundamental insight materials such as dye-sensitized solar cells (DSSCs) made of sensitized nano- particulate thin-films.4 Since

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

Improving the efficiency of water splitting in dye-sensitized solar cells by using a biomimetic  

E-Print Network [OSTI]

Improving the efficiency of water splitting in dye-sensitized solar cells by using a biomimetic studied this problem in dye-sensitized solar cells where a molecular dye and a porous TiO2 electrode act been demonstrated using dye-sensitized electrodes. The quantum yield for water splitting in these dye

16

Methods For Improving Polymeric Materials For Use In Solar Cell Applications  

DOE Patents [OSTI]

A method of manufacturing a solar cell module includes the use of low cost polymeric materials with improved mechanical properties. A transparent encapsulant layer is placed adjacent a rear surface of a front support layer. Interconnected solar cells are positioned adjacent a rear surface of the transparent encapsulant layer to form a solar cell assembly. A backskin layer is placed adjacent a rear surface of the solar cell assembly. At least one of the transparent encapsulant layer and the backskin layer are predisposed to electron beam radiation.

Hanoka, Jack I. (Brookline, MA)

2001-11-20T23:59:59.000Z

17

Methods For Improving Polymeric Materials For Use In Solar Cell Applications  

DOE Patents [OSTI]

A method of manufacturing a solar cell module includes the use of low cost polymeric materials with improved mechanical properties. A transparent encapsulant layer is placed adjacent a rear surface of a front support layer. Interconnected solar cells are positioned adjacent a rear surface of the transparent encapsulant layer to form a solar cell assembly. A backskin layer is placed adjacent a rear surface of the solar cell assembly. At least one of the transparent encapsulant layer and the backskin layer are predisposed to electron beam radiation.

Hanoka, Jack I. (Brookline, MA)

2003-07-01T23:59:59.000Z

18

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 needsfor everything from manufacturing and transportation to air conditioning and charging cell phone batteriesimproved 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 cellsvariations that are so small they are measured in billionths of a meterin 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

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

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. Thebulk heterojunction organic solar cells, blends of a p-type

Armstrong, Paul Barber

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.


21

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

22

High-Surface-Area Architectures for Improved Charge Transfer Kinetics at the Dark Electrode in Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

ABSTRACT: Dye-sensitized solar cell (DSC) redox shuttles other than triiodide/iodide have exhibited: dark electrode, inverse opal, dye cell, fill factor INTRODUCTION Dye-sensitized solar cells (DSCsHigh-Surface-Area Architectures for Improved Charge Transfer Kinetics at the Dark Electrode in Dye-Sensitized

23

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

24

Nanocrystal Solar Cells  

E-Print Network [OSTI]

Nov, 2005). Chapter 4 Hybrid solar cells with 3-dimensionalinorganic nanocrystal solar cells 5.1 Introduction In recentoperation of organic based solar cells and distinguish them

Gur, Ilan

2006-01-01T23:59:59.000Z

25

Improved dye-sensitized solar cells by composite ionic liquid electrolyte incorporating layered titanium phosphate  

SciTech Connect (OSTI)

We reported a composite electrolyte prepared by incorporating layered {alpha}-titanium phosphate ({alpha}-TiP) into a binary ionic liquid of 1-propyl-3-methylimidazolium iodide (PMII) and 1-ethyl-3-methylimidazolium tetrafluoroborate (EmimBF{sub 4}) (volume ratio, 13:7) electrolyte. The addition of {alpha}-TiP markedly improved the photovoltaic properties of dye-sensitized solar cells (DSSCs) compared to that without {alpha}-TiP. The enhancement was explained by improved diffusion of tri-iodide (I{sub 3}{sup -}) ions, suppressed electron recombination with I{sub 3}{sup -} in the electrolyte and increased lifetime of electrons in mesoscopic TiO{sub 2} film. (author)

Cheng, Ping; Lan, Tian; Wang, Wanjun; Wu, Haixia; Yang, Haijun; Guo, Shouwu [National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240 (China); Deng, Changsheng; Dai, Xiaming [Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084 (China)

2010-05-15T23:59:59.000Z

26

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

27

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

28

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

29

Improved CNT-Si heterojunction solar cell with structured single-walled carbon nanotubes Shigeo Maruyama1  

E-Print Network [OSTI]

Improved CNT-Si heterojunction solar cell with structured single-walled carbon nanotubes Shigeo of Tokyo, Japan 113-8656 2 Department of Applied Physics, Aalto University School of Science, Finland 3, mechanical, and thermal properties are expected to be the most promising materials for next-generation energy

Maruyama, Shigeo

30

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

31

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

32

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

33

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. [IEK5Photovoltaik, Forschungszentrum Jlich GmbH, 52425 Jlich (Germany); Michaelis, D.; Waechter, C. [Fraunhofer Institut fr Angewandte Optik und Feinmechanik, Albert Einstein Str. 7, D-07745 Jena (Germany)

2014-03-31T23:59:59.000Z

34

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.

35

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

36

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

37

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

38

Improved solar heating systems  

DOE Patents [OSTI]

An improved solar heating system is described in which the incident radiation of the sun is absorbed on collector panels, transferred to a storage unit and then distributed as heat for a building and the like. The improvement is obtained by utilizing a storage unit comprising separate compartments containing an array of materials having different melting points ranging from 75 to 180/sup 0/F. The materials in the storage system are melted in accordance with the amount of heat absorbed from the sun and then transferred to the storage system. An efficient low volume storage system is provided by utilizing the latent heat of fusion of the materials as they change states in storing ad releasing heat for distribution.

Schreyer, J.M.; Dorsey, G.F.

1980-05-16T23:59:59.000Z

39

Nighttime solar cell  

SciTech Connect (OSTI)

Currently photovoltaic (PV) cells convert solar energy into electrical energy at an efficiency of about 18%, with the maximum conversion rate taking place around noon on a cloudless day. In many applications, the PV cells are utilized to recharge a stand-by battery pack that provides electrical energy at night or on cloudy days. Increasing the utilization of the panel array area by producing electrical power at night will reduce the amount of required electrical energy storage for a given array size and increase system reliability. Thermoelectric generators (TEG) are solid state devices that convert thermal energy into electrical energy. Using the nighttime sky, or deep space, with an effective temperature of 3.5 K as a cold sink, the TEG presented here can produce electrical power at night. The hot junction is supplied energy by the ambient air temperature or some other warm temperature source. The cold junction of the TEG is insulated from the surroundings by a vacuum cell, improving its overall effectiveness. Combining the TEG with the PV cell, a unique solid state device is developed that converts electromagnetic radiant energy into usable electrical energy. The thermoelectric-photovoltaic (TEPV) cell, or the Nighttime Solar Cell, is a direct energy conversion device that produces electrical energy both at night and during the day.

Parise, R.J.

1998-07-01T23:59:59.000Z

40

Thermal Management of Solar Cells  

E-Print Network [OSTI]

cells by cooling and concentration techniques," inheat. Different techniques of cooling solar cells have been

Saadah, Mohammed Ahmed

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.


41

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

42

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

43

Thermal Management of Solar Cells  

E-Print Network [OSTI]

Nanostructured Silicon- Based Solar Cells, 2013. X. C. Tong,heat exchangers, and solar cells," Sci-Tech News, vol. 65,in crystalline silicon solar cells," Renewable Energy, vol.

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

44

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

E-Print Network [OSTI]

of solid-state dye sensitized cells have previously beenon organic polymer and dye-sensitized cells. The detailedof a Typical Dye-Sensitized Cell12 Design of Dyes for Dye-

Armstrong, Paul Barber

2010-01-01T23:59:59.000Z

45

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

46

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

47

Solar cell array interconnects  

DOE Patents [OSTI]

Electrical interconnects 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.

Carey, Paul G. (Mountain View, CA); Thompson, Jesse B. (Brentwood, CA); Colella, Nicolas J. (Livermore, CA); Williams, Kenneth A. (Livermore, CA)

1995-01-01T23:59:59.000Z

48

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

49

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

50

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

51

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,...

52

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

53

Improving the efficiency of water splitting in dye-sensitized solar cells  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for planning experimentalPetroleum MarketingImproving

54

Thermal Management of Solar Cells  

E-Print Network [OSTI]

ratio of the solar cell output power to the incident lightpower to operate the fan. Natural cooling is preferred for solar

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

55

Thermal Management of Solar Cells  

E-Print Network [OSTI]

is the ratio of the solar cell output power to the incidentmaximum power output at: The fill factor of a solar cell FFsolar cell temperature by about 15C, which increases the output power

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

56

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

57

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.

58

NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL  

E-Print Network [OSTI]

efficiency in dye-sensitized solar cells based on Tio2Conversion by Dye-Sensitized Photovoltaic cells. InorganicConversion by Dye-Sensitized Photovoltaic Cells. Inorganic

Phuyal, Dibya

2012-01-01T23:59:59.000Z

59

Fabrication and Characterization of Organic Solar Cells  

E-Print Network [OSTI]

electrodes for dye? sensitizedsolarcells. Nanosolar cells and dye-sensitized solar cells. Figure 1-3 The

Yengel, Emre

2010-01-01T23:59:59.000Z

60

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, and (c) a second photoactive subcell on the first subcell. The first photoactive 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, Mark W. (Golden, CO)

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.


61

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

62

Mixed ternary heterojunction solar cell  

DOE Patents [OSTI]

A thin film heterojunction solar cell and a method of making it has a p-type layer of mixed ternary I-III-VI.sub.2 semiconductor material in contact with an n-type layer of mixed binary II-VI semiconductor material. The p-type semiconductor material includes a low resistivity copper-rich region adjacent the back metal contact of the cell and a composition gradient providing a minority carrier mirror that improves the photovoltaic performance of the cell. The p-type semiconductor material preferably is CuInGaSe.sub.2 or CuIn(SSe).sub.2.

Chen, Wen S. (Seattle, WA); Stewart, John M. (Seattle, WA)

1992-08-25T23:59:59.000Z

63

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.

64

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.

65

Compensated amorphous silicon solar cell  

DOE Patents [OSTI]

An amorphous silicon solar cell including an electrically conductive substrate, a layer of glow discharge deposited hydrogenated amorphous silicon over said substrate and having regions of differing conductivity with at least one region of intrinsic hydrogenated amorphous silicon. The layer of hydrogenated amorphous silicon has opposed first and second major surfaces where the first major surface contacts the electrically conductive substrate and an electrode for electrically contacting the second major surface. The intrinsic hydrogenated amorphous silicon region is deposited in a glow discharge with an atmosphere which includes not less than about 0.02 atom percent mono-atomic boron. An improved N.I.P. solar cell is disclosed using a BF.sub.3 doped intrinsic layer.

Devaud, Genevieve (629 S. Humphrey Ave., Oak Park, IL 60304)

1983-01-01T23:59:59.000Z

66

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

67

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

68

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.

69

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

70

Channeling of electron transport to improve collection efficiency in mesoporous titanium dioxide dye sensitized solar cell stacks  

SciTech Connect (OSTI)

Dye-sensitized solar cell (DSC) modules are generally made by interconnecting large photoelectrode strips with optimized thickness (?14??m) and show lower current density (J{sub SC}) compared with their single cells. We found out that the key to achieving higher J{sub SC} in large area devices is optimized photoelectrode volume (V{sub D}), viz., thickness and area which facilitate the electron channeling towards working electrode. By imposing constraints on electronic path in a DSC stack, we achieved >50% increased J{sub SC} and ?60% increment in photoelectric conversion efficiency in photoelectrodes of similar V{sub D} (?3.36??10{sup ?4} cm{sup 3}) without using any metallic grid or a special interconnections.

Fakharuddin, Azhar; Ahmed, Irfan; Yusoff, Mashitah M.; Jose, Rajan, E-mail: rjose@ump.edu.my, E-mail: joserajan@gmail.com [Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, 26300 Pahang (Malaysia); Khalidin, Zulkeflee [Faculty of Electrical and Electronics Engineering, Universiti Malaysia Pahang, 26300 Pahang (Malaysia)

2014-02-03T23:59:59.000Z

71

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

72

Solar cell module lamination process  

DOE Patents [OSTI]

A solar cell module lamination process using fluoropolymers to provide protection from adverse environmental conditions and thus enable more extended use of solar cells, particularly in space applications. A laminate of fluoropolymer material provides a hermetically sealed solar cell module structure that is flexible and very durable. The laminate is virtually chemically inert, highly transmissive in the visible spectrum, dimensionally stable at temperatures up to about 200.degree. C. highly abrasion resistant, and exhibits very little ultra-violet degradation.

Carey, Paul G. (Mountain View, CA); Thompson, Jesse B. (Brentwood, CA); Aceves, Randy C. (Tracy, CA)

2002-01-01T23:59:59.000Z

73

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

74

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.

Wanlass, Mark W. (Golden, CO)

1994-01-01T23:59:59.000Z

75

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

76

Hybrid structure of polyaniline/ZnO nanograss and its application in dye-sensitized solar cell with performance improvement  

SciTech Connect (OSTI)

Polyaniline (PANI) hybridized ZnO photoanode for dye-sensitized solar cell (DSSC) was primarily prepared via a two-step process which involved hydrothermal growth of ZnO nanograss on the fluorine-doped tin oxide (FTO) substrate and subsequently chemisorption of PANI on the surfaces of the ZnO nanorods. The PANI hybridized ZnO nanograss films were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectra (FT-IR), and the results indicated that there were chemical interactions between PANI and ZnO. Both pure ZnO nanograss and PANI hybridized ZnO nanograss were applied to DSSC. The results of photoelectrochemical measurement showed that the photocurrent density of PANI (100 mg/L) hybridized ZnO nanograss photoanode was significantly enhanced, and the overall light-conversion efficiency increased by 60%. The electrochemical impedance spectra (EIS) displayed that the electron densities in photoanodes of PANI hybridized ZnO nanograss were larger than that in pure ZnO nanograss. This is ascribed to more effective charge separation and faster interfacial charge transferring occurred in the hybrid photoanode. - Graphical abstract: Operational principle of the DSSC: the introduced hybridizing PANI layer performs effective charge separation and faster interfacial charge transferring. Highlights: Black-Right-Pointing-Pointer PANI/ZnO nanograss hybrid materials as photoanode in Dye-sensitized solar cell. Black-Right-Pointing-Pointer Photoelectric conversion efficiency after hybridization was enhanced by 60%. Black-Right-Pointing-Pointer PANI hybridizing ZnO nanograss induced a rapid charge separation.

Zhu Shibu; Wei Wei; Chen Xiangnan [Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031 (China); Jiang Man, E-mail: jiangman1021@163.com [Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031 (China); Zhou Zuowan, E-mail: zwzhou@at-c.net [Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031 (China)

2012-06-15T23:59:59.000Z

77

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

78

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

79

The challenges of organic polymer solar cells  

E-Print Network [OSTI]

The technical and commercial prospects of polymer solar cells were evaluated. Polymer solar cells are an attractive approach to fabricate and deploy roll-to-roll processed solar cells that are reasonably efficient (total ...

Saif Addin, Burhan K. (Burhan Khalid)

2011-01-01T23:59:59.000Z

80

Fabrication and Characterization of Organic Solar Cells  

E-Print Network [OSTI]

WrfelP. Physicsofsolarcells:fromprinciplestonewgeneration photovoltaics: solar cells for 2020 andSpitzer MB. INDIUM?PHOSPHIDE SOLAR?CELLS MADE BY ION?

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.


81

Commercialization of Novel Organic Solar Cells  

E-Print Network [OSTI]

Commercialization of Novel Organic Solar Cells Master of Engineering Final Report Shanel C. Miller................................................................................................................... 12 2.1 How do Solar Cells Work?.................................................................................................. 12 2.2 Types of Solar Cells that Exist Today

Kassegne, Samuel Kinde

82

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

83

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...

84

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

85

Triple-Junction a-Si Solar Cells Deposited With Improved Intrinsic Layers X. Deng, W. Wang, X.B. Liao, S. Han, H. Povolny, X.B. Xiang, and W. Du  

E-Print Network [OSTI]

-Si/a-SiGe/a-SiGe triple cells with 12.7% initial efficiency. Figure 1 shows the IV curve of the 12.7% triple cell, GD585.7%. Figure 1 IV curve of a UT fabricated triple cell, showing 12.7% initial, active-area efficiency. Figure 2Triple-Junction a-Si Solar Cells Deposited With Improved Intrinsic Layers X. Deng, W. Wang, X

Deng, Xunming

86

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

87

Un-Nanostructuring Solar Cells | ANSER Center | Argonne-Northwestern...  

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

Un-Nanostructuring Solar Cells Home > Research > ANSER Research Highlights > Un-Nanostructuring Solar Cells...

88

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

89

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,...

90

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

91

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.

92

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

93

Solar cells with a twist Comments ( 35)  

E-Print Network [OSTI]

Solar cells with a twist Article Comments ( 35) JULIE STEENHUYSEN REUTERS OCTOBER 7, 2008 AT 9:58 AM EDT CHICAGO -- U.S. researchers have found a way to make efficient silicon-based solar cells of buildings as opportunities for solar energy," Prof. Rogers said in a telephone interview. Solar cells, which

Rogers, John A.

94

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

95

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.

96

Modifying the organic/electrode interface in Organic Solar Cells (OSCs) and improving the efficiency of solution-processed phosphorescent Organic Light-Emitting Diodes (OLEDs)  

SciTech Connect (OSTI)

Organic semiconductors devices, such as, organic solar cells (OSCs), organic light-emitting diodes (OLEDs) and organic field-effect transistors (OFETs) have drawn increasing interest in recent decades. As organic materials are flexible, light weight, and potentially low-cost, organic semiconductor devices are considered to be an alternative to their inorganic counterparts. This dissertation will focus mainly on OSCs and OLEDs. As a clean and renewable energy source, the development of OSCs is very promising. Cells with 9.2% power conversion efficiency (PCE) were reported this year, compared to < 8% two years ago. OSCs belong to the so-called third generation solar cells and are still under development. While OLEDs are a more mature and better studied field, with commercial products already launched in the market, there are still several key issues: (1) the cost of OSCs/OLEDs is still high, largely due to the costly manufacturing processes; (2) the efficiency of OSCs/OLEDs needs to be improved; (3) the lifetime of OSCs/OLEDs is not sufficient compared to their inorganic counterparts; (4) the physics models of the behavior of the devices are not satisfactory. All these limitations invoke the demand for new organic materials, improved device architectures, low-cost fabrication methods, and better understanding of device physics. For OSCs, we attempted to improve the PCE by modifying the interlayer between active layer/metal. We found that ethylene glycol (EG) treated poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT: PSS) improves hole collection at the metal/polymer interface, furthermore it also affects the growth of the poly(3- hexylthiophene) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) blends, making the phase segregation more favorable for charge collection. We then studied organic/inorganic tandem cells. We also investigated the effect of a thin LiF layer on the hole-collection of copper phthalocyanine (CuPc)/C70-based small molecular OSCs. A thin LiF layer serves typically as the electron injection layer in OLEDs and electron collection interlayer in the OSCs. However, several reports showed that it can also assist in holeinjection in OLEDs. Here we first demonstrate that it assists hole-collection in OSCs, which is more obvious after air-plasma treatment, and explore this intriguing dual role. For OLEDs, we focus on solution processing methods to fabricate highly efficient phosphorescent OLEDs. First, we investigated OLEDs with a polymer host matrix, and enhanced charge injection by adding hole- and electron-transport materials into the system. We also applied a hole-blocking and electron-transport material to prevent luminescence quenching by the cathode. Finally, we substituted the polymer host by a small molecule, to achieve more efficient solution processed small molecular OLEDs (SMOLEDs); this approach is cost-effective in comparison to the more common vacuum thermal evaporation. All these studies help us to better understand the underlying relationship between the organic semiconductor materials and the OSCs and OLEDs performance and will subsequently assist in further enhancing the efficiencies of OSCs and OLEDs. With better efficiency and longer lifetime, the OSCs and OLEDs will be competitive with their inorganic counterparts.

Xiao, Teng

2012-04-27T23:59:59.000Z

97

Oligo and Poly-thiophene/Zno Hybrid Nanowire Solar Cells  

E-Print Network [OSTI]

ZnO Hybrid Nanowire Solar Cells Alejandro L. Briseno, Thomashybrid single nanowire solar cell. End-functionalized oligo-Individual nanowire solar cell devices exhibited well-

Briseno, Alejandro L.

2010-01-01T23:59:59.000Z

98

(Melanin-Sensitized Solar Cell) : 696220016  

E-Print Network [OSTI]

the majority dye-sensitized solar cell research all uses the Ruthenium-complex as a light harvester. Dye-sensitized solar cell, DSSC 1991GrätzelDSSC[1] DSSCGrätzel cellDSSC polypyridyl complexes (Melanin-Sensitized Solar Cell) : : : 696220016 #12; #12;#12; #12;I PLD

99

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

100

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.


101

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

102

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.

103

Process of making solar cell module  

DOE Patents [OSTI]

A process is presented for the manufacture of solar cell modules. A solution comprising a highly plasticized polyvinyl butyral is applied to a solar cell array. The coated array is dried and sandwiched between at last two sheets of polyvinyl butyral and at least two sheets of a rigid transparent member. The sandwich is laminated by the application of heat and pressure to cause fusion and bonding of the solar cell array with the rigid transparent members to produce a solar cell module.

Packer, M.; Coyle, P.J.

1981-03-09T23:59:59.000Z

104

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

105

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.

106

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.

107

Nanowire-based All Oxide Solar Cells  

E-Print Network [OSTI]

7: 471. 6) Rai, B.P. Solar Cells, 1988, 25, 265. 7) Minami,1999, 2) Green, M.A. , Solar Cells, 1982, Prentice-Hall,of ZnO nanowire array used in solar cells, prior to Cu 2 O

Yang, Peidong

2009-01-01T23:59:59.000Z

108

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

7/21/2010 1 EE580 Solar Cells Todd J. Kaiser Lecture 04 Semiconductor Materials Chapter 1 1Montana State University: Solar Cells Lecture 4: Semiconductor Materials Semiconductor Bond Model Bohr electrons interact to form bonds 2Montana State University: Solar Cells Lecture 4: Semiconductor Materials

Kaiser, Todd J.

109

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

7/21/2010 1 EE580 Solar Cells Todd J. Kaiser Lecture 03 Nature of Sunlight 1Montana State University: Solar Cells Lecture 3: Nature of Sunlight Wave-Particle Duality Light acts as Waves University: Solar Cells Lecture 3: Nature of Sunlight Properties of Light Sunlight contains photons of many

Kaiser, Todd J.

110

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

E-Print Network [OSTI]

Monocrystalline silicon solar cells, polycrystalline silicon solar cells, and amorphous silicon (thin-film) solar

Tu, Bor-An Clayton

2013-01-01T23:59:59.000Z

111

When Function Follows Form: Plastic Solar Cells | ANSER Center...  

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

When Function Follows Form: Plastic Solar Cells Home > Research > ANSER Research Highlights > When Function Follows Form: Plastic Solar Cells...

112

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network [OSTI]

electrodes for dye-sensitized solar cells, Nano Lett. 8 (electrodes for dye-sensitized solar cells, Nano Letters 8,

Shao, Qinghui

2009-01-01T23:59:59.000Z

113

NANO REVIEW Enhancing Solar Cell Efficiencies through 1-D Nanostructures  

E-Print Network [OSTI]

include dye-sensitized solar cells, quantum- dot-sensitized solar cells, and p-n junction solar cells their efficiencies more practical. Now the third-generation solar cells, such as dye-sensitized solar cells (DSSCsNANO REVIEW Enhancing Solar Cell Efficiencies through 1-D Nanostructures Kehan Yu ? Junhong Chen

Chen, Junhong

114

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

115

Compensated amorphous-silicon solar cell  

DOE Patents [OSTI]

An amorphous silicon solar cell including an electrically conductive substrate, a layer of glow discharge deposited hydrogenated amorphous silicon having regions of differing conductivity with at least one region of intrinsic hydrogenated amorphous silicon. The layer of hydrogenated amorphous silicon has opposed first and second major surfaces where the first major surface contacts the elecrically conductive substrate and an electrode for electrically contacting the second major surface. The intrinsic hydrogenated amorphous silicon region is deposited in a glow discharge with an atmosphere which includes not less than about 0.02 atom percent mono-atomic boron. An improved N.I.P. solar cell is disclosed using a BF/sub 3/ doped intrinsic layer.

Devaud, G.

1982-06-21T23:59:59.000Z

116

Solar Cells, 3 (1981) 337 -340 337 HIGH EFFICIENCY BIFACIAL BACK SURFACE FIELD SOLAR CELLS  

E-Print Network [OSTI]

. CUEVAS, A. LUQUE, J. EGUREN and J. DEL ALAMO Instituto de Energia Solar, Escuela Tdcnica Superior deSolar Cells, 3 (1981) 337 - 340 337 HIGH EFFICIENCY BIFACIAL BACK SURFACE FIELD SOLAR CELLS A solar cells are presented. Effi- ciencies of 15.7% and 13.6% were measured under front and back air mass

del Alamo, Jesús A.

117

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

118

Detailed balance analysis of nanophotonic solar cells  

E-Print Network [OSTI]

, "Demonstration of enhanced absorption in thin film si solar cells with textured photonic crystal back reflector. R. A. Pala, J. White, E. Barnard, J. Liu, and M. L. Brongersma, "Design of plasmonic thin-film solar of surface textures for thin-film si solar cells," Opt. Express 19, A841­A850 (2011). 15. A. Raman, Z. Yu

Fan, Shanhui

119

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

120

Spectroscopy of Donor--Acceptor Porphyrins for Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

Spectroscopy of Donor--Acceptor Porphyrins for Dye-Sensitized Solar Cells Ioannis Zegkinoglou improvement in the design of dye- sensitized solar cells has been the combination of light- absorbing the energy conversion efficiency. INTRODUCTION Dye-sensitized solar cells (DSSCs) are promising alternatives

Himpsel, Franz J.

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

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

122

METAL BLACKS AS SCATTERING CENTERS TO INCREASE THE EFFICIENCY OF THIN FILM SOLAR CELLS  

E-Print Network [OSTI]

METAL BLACKS AS SCATTERING CENTERS TO INCREASE THE EFFICIENCY OF THIN FILM SOLAR CELLS by DEEP R surface of thin-film solar cells to improve efficiency. The principle is that scattering, which film solar cell. The particular types of particles investigated here are known as "metal-black", well

Peale, Robert E.

123

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

124

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

125

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

126

TRANSPARENT COATINGS FOR SOLAR CELLS RESEARCH  

SciTech Connect (OSTI)

Todays solar cells are fabricated using metal oxide based transparent conductive coatings (TCC) or metal wires with optoelectronic performance exceeding that currently possible with Carbon Nanotube (CNT) based TCCs. The motivation for replacing current TCC is their inherent brittleness, high deposition cost, and high deposition temperatures; leading to reduced performance on thin substrates. With improved processing, application and characterization techniques Nanofiber and/or CNT based TCCs can overcome these shortcomings while offering the ability to be applied in atmospheric conditions using low cost coating processes At todays level of development, CNT based TCC are nearing commercial use in touch screens, some types of information displays (i.e. electronic paper), and certain military applications. However, the resistivity and transparency requirements for use in current commercial solar cells are more stringent than in many of these applications. Therefore, significant research on fundamental nanotube composition, dispersion and deposition are required to reach the required performance commanded by photovoltaic devices. The objective of this project was to research and develop transparent conductive coatings based on novel nanomaterial composite coatings, which comprise nanotubes, nanofibers, and other nanostructured materials along with binder materials. One objective was to show that these new nanomaterials perform at an electrical resistivity and optical transparency suitable for use in solar cells and other energy-related applications. A second objective was to generate new structures and chemistries with improved resistivity and transparency performance. The materials also included the binders and surface treatments that facilitate the utility of the electrically conductive portion of these composites in solar photovoltaic devices. Performance enhancement venues included: CNT purification and metallic tube separation techniques, chemical doping, CNT patterning and alignment, advances in commercial and research materials and field effect schemes. In addition, Eikos continued to develop improved efficiency coating materials and transfer methods suitable for batch and continuous roll-to-roll fabrication requirements. Finally, Eikos collaborated with NREL and the PV-community at large in fabricating and characterizing Invisicon???® enabled solar cells.

Glatkowski, P.J.; Landis, D.A.

2013-04-16T23:59:59.000Z

127

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

128

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

129

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

130

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

131

Moon's Radiation Environment and Expected Performance of Solar Cells during Future Lunar Missions  

E-Print Network [OSTI]

Several lunar missions are planned ahead and there is an increasing demand for efficient photovoltaic power generation in the moon. The knowledge of solar cell operation in the lunar surface obtained during early seventies need to be updated considering current views on solar variability and emerging space solar cell technologies. In this paper some aspects of the solar cell performance expected under variable lunar radiation environment during future space missions to moon are addressed. We have calculated relative power expected from different types of solar cells under extreme solar proton irradiation conditions and high lunar daytime temperature. It is also estimated that 2-3 % of annual solar cell degradation is most probable during the future lunar missions. We have also discussed photovoltaic power generation in long term lunar bases emphasizing technological needs such as sunlight concentration, solar cell cooling and magnetic shielding of radiation for improving the efficiency of solar cells in the l...

Girish, T E

2010-01-01T23:59:59.000Z

132

Moon's Radiation Environment and Expected Performance of Solar Cells during Future Lunar Missions  

E-Print Network [OSTI]

Several lunar missions are planned ahead and there is an increasing demand for efficient photovoltaic power generation in the moon. The knowledge of solar cell operation in the lunar surface obtained during early seventies need to be updated considering current views on solar variability and emerging space solar cell technologies. In this paper some aspects of the solar cell performance expected under variable lunar radiation environment during future space missions to moon are addressed. We have calculated relative power expected from different types of solar cells under extreme solar proton irradiation conditions and high lunar daytime temperature. It is also estimated that 2-3 % of annual solar cell degradation is most probable during the future lunar missions. We have also discussed photovoltaic power generation in long term lunar bases emphasizing technological needs such as sunlight concentration, solar cell cooling and magnetic shielding of radiation for improving the efficiency of solar cells in the lunar environment.

T. E Girish; S Aranya

2010-12-03T23:59:59.000Z

133

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

E-Print Network [OSTI]

organic, hybrid and dye sensitized solar cells took place insolar cells, dye-sensitized solar cells, solar inks using

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

134

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

135

Pennsylvania Company Develops Solar Cell Printing Technology  

Broader source: Energy.gov [DOE]

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.

136

COLLOIDAL SEMICONDUCTOR NANOCRYSTALS BASED SOLAR CELLS  

E-Print Network [OSTI]

-II heterojunction bi-layer structure in solar-cells based on CdTe and CdSe nanocrystals. Submitted to ACS NANO. 2011

Tessler, Nir

137

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.ltoreq.X.ltoreq.0.515) top cell semiconductor lattice matched to a GaAs bottom cell semiconductor at a low-resistance heterojunction, preferably a p+/n+ 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, Jerry M. (Lakewood, CO)

1987-01-01T23:59:59.000Z

138

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

139

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

140

Solar Power in the Desert: Are the current large-scale solar developments really improving Californias 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 Californias

Allen, Michael F.; McHughen, Alan

2011-01-01T23:59:59.000Z

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.


141

EELE408 Photovoltaics Lecture 10 Solar Cell Operation  

E-Print Network [OSTI]

@ece.montana.edu Department of Electrical and Computer Engineering Montana State University - Bozeman P-N Junction Solar Cell of the number of carriers collected by the solar cell to the number of photons of a given energy incident energy is not utilized by the solar cell and instead goes to heating the solar cell 12 solar cell

Kaiser, Todd J.

142

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

143

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

144

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 multicrystallline 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.

Tsuo, Y. Simon (Golden, CO); Landry, Marc D. (Lafayette, CO); Pitts, John R. (Lakewood, CO)

1997-01-01T23:59:59.000Z

145

Imprinted large-scale high density polymer nanopillars for organic solar cells  

E-Print Network [OSTI]

Imprinted large-scale high density polymer nanopillars for organic solar cells Mukti Aryal used to make bulk heterojunction solar cells by depositing PCBM on top of the pillars. Imprinting provides a way to precisely control the interdigitized heterojunction morphology, leading to improved solar

Gao, Jinming

146

Enhanced light absorption of solar cells and photodetectors by diffraction  

DOE Patents [OSTI]

Enhanced light absorption of solar cells and photodetectors by diffraction is described. Triangular, rectangular, and blazed subwavelength periodic structures are shown to improve performance of solar cells. Surface reflection can be tailored for either broadband, or narrow-band spectral absorption. Enhanced absorption is achieved by efficient optical coupling into obliquely propagating transmitted diffraction orders. Subwavelength one-dimensional structures are designed for polarization-dependent, wavelength-selective absorption in solar cells and photodetectors, while two-dimensional structures are designed for polarization-independent, wavelength-selective absorption therein. Suitable one and two-dimensional subwavelength periodic structures can also be designed for broadband spectral absorption in solar cells and photodetectors. If reactive ion etching (RIE) processes are used to form the grating, RIE-induced surface damage in subwavelength structures can be repaired by forming junctions using ion implantation methods. RIE-induced surface damage can also be removed by post RIE wet-chemical etching treatments.

Zaidi, Saleem H.; Gee, James M.

2005-02-22T23:59:59.000Z

147

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

148

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

149

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

E-Print Network [OSTI]

1.6 Schematic of a solar panel with PV cells connected inand installation cost of solar panels and enhance PV cell1.6 Schematic of a solar panel with PV cells connected in

Leow, Shin Woei

2014-01-01T23:59:59.000Z

150

Quantum Junction Solar Cells Jiang Tang,,  

E-Print Network [OSTI]

Quantum Junction Solar Cells Jiang Tang,, Huan Liu,, David Zhitomirsky, Sjoerd Hoogland, Xihua, 1037 Luoyu Road, Wuhan, Hubei 430074, China Department of Electrical and Computer Engineering-type and p-type materials to create the first quantum junction solar cells. We present a family

151

CRADA Final Report: Process development for hybrid solar cells  

E-Print Network [OSTI]

development for hybrid solar cells Summary of the specific20 wafers with full tandem solar cell test structure perNitride/Silicon Tandem Solar Cell, Appl. Phys. Express 2

Ager, Joel W

2011-01-01T23:59:59.000Z

152

Thermodynamics, Entropy, Information and the Efficiency of Solar Cells  

E-Print Network [OSTI]

91, 43. T. Markvart, Solar cell as a heat engine: energyTiedje, Physical Limits to Solar Cell Efficiency, in EnergyThe Carnot Factor in Solar-Cell Theory. Solid State

Abrams, Zeev R.

2012-01-01T23:59:59.000Z

153

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network [OSTI]

the intermediate band solar cell under nonideal space chargeInGaP/GaAs tandem solar cells, Appl. Phys. Lett. 70, 381 (band impact ionization and solar cell efficiency, J. Appl.

Shao, Qinghui

2009-01-01T23:59:59.000Z

154

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

155

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

156

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

157

Understanding Collection-Related Losses in Organic Solar Cells...  

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

Understanding Collection-Related Losses in Organic Solar Cells Home > Research > ANSER Research Highlights > Understanding Collection-Related Losses in Organic Solar Cells...

158

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...

159

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...

160

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

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

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

E-Print Network [OSTI]

Monocrystalline silicon solar cells, polycrystalline silicon solar cells, and amorphous silicon (thin-film)

Tu, Bor-An Clayton

2013-01-01T23:59:59.000Z

162

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

163

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

164

Heterojunction solar cell with passivated emitter surface  

DOE Patents [OSTI]

A high-efficiency heterojunction solar cell 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.

Olson, Jerry M. (Lakewood, CO); Kurtz, Sarah R. (Golden, CO)

1994-01-01T23:59:59.000Z

165

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

166

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

167

Effects of Dye Loading Conditions on the Energy Conversion Efficiency of ZnO and TiO2 Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

light conversion efficiency of zinc oxide (ZnO) film electrodes in dye-sensitized solar cellsO) has been explored as an alternative material in dye-sensitized solar cells. The use of Zn as an alternative material for improving the solar cell performance in dye-sensitized solar cells due to (1) Zn

Cao, Guozhong

168

Solar Energy Materials & Solar Cells 71 (2002) 261271 Photoelectric behavior of nanocrystalline TiO2  

E-Print Network [OSTI]

. A sandwich-type solar cell fabricated by this dye-sensitized nanocrystalline TiO2 film generated 6:1 mA cm?2; Nanocrystalline TiO2; Dye sensitized solar cell; Terpyridyl ruthenium dyes; Photoelectrochemical solar cells unmatched performance in dye staff studied as solar cell sensitizer before 1997. Only recently, a black dye

Huang, Yanyi

169

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

170

Rational design of hybrid organic solar cells  

E-Print Network [OSTI]

In this thesis, we will present a novel design for a nano-structured organic-inorganic hybrid photovoltaic material that will address current challenges in bulk heterojunction (BHJ) organic-based solar cell materials. ...

Lentz, Levi (Levi Carl)

2014-01-01T23:59:59.000Z

171

Colloidal cluster phases and solar cells  

E-Print Network [OSTI]

The arrangement of soft materials through solution processing techniques is a topic of profound importance for next generation solar cells; the resulting morphology has a major influence on construction, performance and ...

Mailer, Alastair George

2012-11-28T23:59:59.000Z

172

Texturization of multicrystalline silicon solar cells  

E-Print Network [OSTI]

A significant efficiency gain for crystalline silicon solar cells can be achieved by surface texturization. This research was directed at developing a low-cost, high-throughput and reliable texturing method that can create ...

Li, Dai-Yin

2010-01-01T23:59:59.000Z

173

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

174

Fabricating amorphous silicon solar cells by varying the temperature _of the substrate during deposition of the amorphous silicon layer  

DOE Patents [OSTI]

An improved process for fabricating amorphous silicon solar cells in which the temperature of the substrate is varied during the deposition of the amorphous silicon layer is described. Solar cells manufactured in accordance with this process are shown to have increased efficiencies and fill factors when compared to solar cells manufactured with a constant substrate temperature during deposition of the amorphous silicon layer.

Carlson, David E. (Yardley, PA)

1982-01-01T23:59:59.000Z

175

DOI: 10.1002/asia.201200349 Dye-Sensitized TiO2 Nanotube Solar Cells: Rational Structural and Surface  

E-Print Network [OSTI]

DOI: 10.1002/asia.201200349 Dye-Sensitized TiO2 Nanotube Solar Cells: Rational Structural employed to substitute TiO2 nanoparticles for use in dye-sensitized solar cells. To fur- ther improve the performance of dye-sensitized TiO2 nanotube solar cells, efforts have been directed toward the optimization

Lin, Zhiqun

176

OPTIMIZATION OF GaN WINDOW LAYER FOR InGaN SOLAR CELLS USING POLARIZATION EFFECT  

E-Print Network [OSTI]

on the design of wide-band gap GaN window layers for InGaN solar cells. Window layers serve to passivate the top into account during design of the solar cell to improve its collection efficiency. Previously, we have. The present work is a subset of the design optimization process for such solar cells, where we focus

Honsberg, Christiana

177

Microstructured surface design for omnidirectional antireflection coatings on solar cells  

E-Print Network [OSTI]

to current crystalline silicon solar cells, as well as future thin film, quantum dot, and organic solar cells as the precise control of film thick- ness. In solar cell applications, a single layer thin film AR coating, e.g., silicon nitride SiNx thin film for silicon Si solar cells, is often used as a cost effective approach

Zhou, Weidong

178

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

179

Limit of light coupling into solar cells  

E-Print Network [OSTI]

We introduce a limit for the strength of coupling light into the modes of solar cells. This limit depends on both a cell's thickness and its modal properties. For a cell with refractive index n and thickness d, we obtain a maximal coupling rate of 2c*sqrt(n^2-1)/d where c is speed of light. Our method can be used in the design of solar cells and in calculating their efficiency limits; besides, it can be applied to a broad variety of resonant phenomena and devices.

Naqavi, A; Ballif, C; Scharf, T; Herzig, H P

2013-01-01T23:59:59.000Z

180

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

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

Reducing the Cost of Solar Cells  

SciTech Connect (OSTI)

Solar-powered electricity prices could soon approach those of power from coal or natural gas thanks to collaborative research with solar startup Ampulse Corporation at the National Renewable Energy Laboratory. Silicon wafers account for almost half the cost of today's solar photovoltaic panels, so reducing or eliminating wafer costs is essential to bringing prices down. Current crystalline silicon technology converts energy in a highly efficient manner; however, that technology is manufactured with processes that could stand some improvement. The industry needs a method that is less complex, creates less waste and uses less energy. First, half the refined silicon is lost as dust in the wafer-sawing process, driving module costs higher. Wafers are sawn off of large cylindrical ingots, or boules, of silicon. A typical 2-meter boule loses as many as 6,000 potential wafers during sawing. Second, the wafers produced are much thicker than necessary. To efficiently convert sunlight into electricity, the wafers need be only one-tenth the typical thickness. NREL, the Oak Ridge National Laboratory and Ampulse have partnered on an approach to eliminate this waste and dramatically lower the cost of the finished solar panels. By using a chemical vapor deposition process to grow the silicon on inexpensive foil, Ampulse is able to make the solar cells just thick enough to convert most of the solar energy into electricity. No more sawdust - and no more wasting refined silicon materials. NREL developed the technology to grow high-quality silicon and ORNL developed the metal foil that has the correct crystal structure to support that growth. Ampulse is installing a pilot manufacturing line in NREL's Process Development Integration Laboratory, where solar companies can work closely with lab scientists on integrated equipment to answer pressing questions related to their technology development, as well as rapidly overcoming R and D challenges and risk. NREL's program is focused on transformative innovation in the domestic PV industry. With knowledge and expertise acquired from the PDIL pilot production line tools, Ampulse plans to design a full-scale production line to accommodate long rolls of metal foil. The Ampulse process 'goes straight from pure silicon-containing gas to high-quality crystal silicon film,' said Brent Nelson, the operational manager for the Process Development Integration Laboratory. 'The advantage is you can make the wafer just as thin as you need it - 10 microns or less.' Most of today's solar cells are made out of wafer crystalline silicon, though thin-film cells made of more exotic elements such as copper, indium, gallium, arsenic, cadmium, tellurium and others are making a strong push into the market. The advantage of silicon is its abundance, because it is derived from sand. Silicon's disadvantage is that purifying it into wafers suitable for solar cells can be expensive and energy intensive. Manufacturers add carbon and heat to sand to produce metallurgical-grade silicon, which is useful in other industries, but not yet suitable for making solar cells. So this metallurgical-grade silicon is then converted to pure trichlorosilane (SiCl3) or silane (SiH4) gas. Typically, the purified gas is then converted to create a silicon feedstock at 1,000 degrees Celsius. This feedstock is melted at 1,414 C and recrystallized into crystal ingots that are finally sawed into wafers. The Ampulse method differs in that it eliminates the last two steps in the traditional process and works directly with the silane gas growing only the needed silicon right onto a foil substrate. A team of NREL scientists had developed a way to use a process called hot-wire chemical vapor deposition to thicken silicon wafers with near perfect crystal structure. Using a hot tungsten filament much like the one found in an incandescent light bulb, the silane gas molecules are broken apart and deposited onto the wafer using the chemical vapor deposition technique at about 700 C - a much lower temperature than needed to make the wafer. The hot filament dec

Scanlon, B.

2012-04-01T23:59:59.000Z

182

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

183

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

184

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

185

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

186

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

187

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.

188

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-weighted thin-film indium phosphide solar cell and its computer simulation Guohua Lia, *, Qingfen Yanga+ -i-p+ InP solar cell is developed. The total thickness of its epitaxial layer is only 0.22 mm

Woodall, Jerry M.

189

* 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

190

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

191

Questions I will answer What is a solar cell?  

E-Print Network [OSTI]

grid 4 #12;5 #12;Solar panels on the Interna9onal Space Sta9on 6 #12;Area#12;Questions I will answer · What is a solar cell? · How are solar cells are solar cells made? · How do they work? · How efficient can they be? · How

McGehee, Michael

192

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.

193

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

194

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

195

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

196

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

197

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

198

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.

199

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

200

NREL scientists develop robust, high-performance IZO transparent contact for CIGS solar cells.  

E-Print Network [OSTI]

NREL scientists develop robust, high-performance IZO transparent contact for CIGS solar cells indium gallium diselenide (CIGS) solar cell is zinc oxide (ZnO). The problem is that unprotected Zn is a lifetime-limiting problem that is currently addressed solely through encapsulation. Fundamentally improving

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

Improved photovoltaic cells and electrodes  

DOE Patents [OSTI]

Improved photovoltaic cells and electrodes for use therein, particularly electrodes employing amorphous silicon or polyacetylene coating are produced by a process which includes filling pinholes or porous openings in the coatings by electrochemical oxidation of selected monomers to deposit insulating polymer in the openings.

Skotheim, T.A.

1983-06-29T23:59:59.000Z

202

Towards III-V solar cells on Si: Improvement in the crystalline quality of Ge-on-Si virtual substrates through low porosity porous silicon buffer layer and annealing  

SciTech Connect (OSTI)

A comparison between the crystalline quality of Ge grown on bulk Si and on a low porosity porous Si (pSi) buffer layer using low energy plasma enhanced chemical vapor deposition is reported. Omega/2Theta coupled scans around the Ge and Si (004) diffraction peaks show a reduction of the Ge full-width at half maximum (FWHM) of 22.4% in presence of the pSi buffer layer, indicating it is effective in improving the epilayer crystalline quality. At the same time atomic force microscopy analysis shows an increase in root means square roughness for Ge grown on pSi from 38.5 nm to 48.0 nm, as a consequence of the larger surface roughness of pSi compared to bulk Si. The effect of 20 minutes vacuum annealing at 580C is also investigated. The annealing leads to a FWHM reduction of 23% for Ge grown on Si and of 36.5% for Ge on pSi, resulting in a FWHM of 101 arcsec in the latter case. At the same time, the RMS roughness is reduced of 8.8% and of 46.5% for Ge grown on bulk Si and on pSi, respectively. The biggest improvement in the crystalline quality of Ge grown on pSi with respect to Ge grown on bulk Si observed after annealing is a consequence of the simultaneous reorganization of the Ge epilayer and the buffer layer driven by energy minimization. A low porosity buffer layer can thus be used for the growth of low defect density Ge on Si virtual substrates for the successive integration of III-V multijunction solar cells on Si. The suggested approach is simple and fast thus allowing for high throughput-, moreover is cost effective and fully compatible with subsequent wafer processing. Finally it does not introduce new chemicals in the solar cell fabrication process and can be scaled to large area silicon wafers.

Calabrese, Gabriele; Baricordi, Stefano; Bernardoni, Paolo; Fin, Samuele; Guidi, Vincenzo; Vincenzi, Donato [University of Ferrara - Physics and Earth Science Department, Via Saragat 1, 44122 Ferrara (Italy)

2014-09-26T23:59:59.000Z

203

Method of fabricating a solar cell array  

DOE Patents [OSTI]

A first set of pre-tabbed solar cells are assembled in a predetermined array with at least part of each tab facing upward, each tab being fixed to a bonding pad on one cell and abutting a bonding pad on an adjacent cell. The cells are held in place with a first vacuum support. The array is then inverted onto a second vacuum support which holds the tabs firmly against the cell pads they abut. The cells are exposed to radiation to melt and reflow the solder pads for bonding the tab portions not already fixed to bonding pads to these pads.

Lazzery, Angelo G. (Oaklyn, NJ); Crouthamel, Marvin S. (Pennsauken, NJ); Coyle, Peter J. (Oaklyn, NJ)

1982-01-01T23:59:59.000Z

204

The Kanatzidis - Chang Cell: dye sensitized all solid state solar...  

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

The Kanatzidis - Chang Cell: dye sensitized all solid state solar cell Home > Research > ANSER Research Highlights > The Kanatzidis - Chang Cell: dye sensitized all solid state...

205

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

206

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

207

Hybrid Solar Cells with Prescribed Nanoscale Morphologies Based on Hyperbranched Semiconductor Nanocrystals  

E-Print Network [OSTI]

polymer bulk heterojunction solar cells. Journal of PhysicalS. & Meissner, D. Hybrid solar cells based on nanoparticlesmodelling of organic solar cells: The dependence of internal

Gur, Ilan; Fromer, Neil A.; Chen, Chih-Ping; Kanaras, Antonios G.; Alivisatos, A. Paul

2006-01-01T23:59:59.000Z

208

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

E-Print Network [OSTI]

Nanocrystalline dye-sensitized solar cell/copper indium3, pp. M. Grtzel, Dye-sensitized solar cells, Journal ofefficiency solar cell based on dye- sensitized colloidal

Tu, Bor-An Clayton

2013-01-01T23:59:59.000Z

209

Charge Transport Properties in TiO2 Network with Different Particle Sizes for Dye Sensitized Solar Cells  

E-Print Network [OSTI]

the large improvement in performance of dye sensitized solar cells (DSCs) achieved in 1991, mesoporousCharge Transport Properties in TiO2 Network with Different Particle Sizes for Dye Sensitized Solar sensitized solar cells, nanoparticle size, impedance, charge transport properties INTRODUCTION Since

Cao, Guozhong

210

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 by Efficiency 22 Rear Panel before Lamination 23 Buried Contact Solar Cells · High Efficiency · Laser groved1 EELE408 Photovoltaics Lecture 16: Silicon Solar Cell Fabrication Techniques Dr. Todd J. Kaiser

Kaiser, Todd J.

211

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

212

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

213

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

214

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

215

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

216

Multi-junction solar cell device  

DOE Patents [OSTI]

A multi-junction solar cell device (10) is provided. The multi-junction solar cell device (10) comprises either two or three active solar cells connected in series in a monolithic structure. The multi-junction device (10) comprises a bottom active cell (20) having a single-crystal silicon substrate base and an emitter layer (23). The multi-junction device (10) further comprises one or two subsequent active cells each having a base layer (32) and an emitter layer (23) with interconnecting tunnel junctions between each active cell. At least one layer that forms each of the top and middle active cells is composed of a single-crystal III-V semiconductor alloy that is substantially lattice-matched to the silicon substrate (22). The polarity of the active p-n junction cells is either p-on-n or n-on-p. The present invention further includes a method for substantially lattice matching single-crystal III-V semiconductor layers with the silicon substrate (22) by including boron and/or nitrogen in the chemical structure of these layers.

Friedman, Daniel J. (Lakewood, CO); Geisz, John F. (Wheat Ridge, CO)

2007-12-18T23:59:59.000Z

217

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

218

November 21, 2000 PV Lesson Plan 1 Solar Cells  

E-Print Network [OSTI]

November 21, 2000 PV Lesson Plan 1 Solar Cells Prepared for the Oregon Million Solar Roofs Coalition By Frank Vignola University of Oregon Solar Radiation Monitoring Lab John Hocken South Eugene High School Gary Grace South Eugene High School In Schools #12;1 Solar Cells Lesson Plan Content

Oregon, University of

219

Colloidal PbS Quantum Dot Solar Cells with High Fill Factor  

E-Print Network [OSTI]

much progress in improving the power conversion efficiency (PCE) of nano- structured solar cells is that the open-circuit voltage (VOC), an important metric that directly affects the PCE, is ex- pected

220

Electrical overstress failure in silicon solar cells  

SciTech Connect (OSTI)

A solar-cell electrical-overstress-failure model and the results of experimental measurements of threshold pulsed failure currents on four types of silicon solar cells are presented. The transient EMP field surrounding a lightning stroke has been identified as a potential threat to a photovoltaic array, yet failure analysis of solar cells in a pulsed environment had not previously been reported. Failure in the low-resistivity concentrator cells at pulse widths between 1 ..mu..s and 1 ms occurred initially in the junction. Finger damage in the form of silver melting occurs at currents only slightly greater than that required for junction damage. The result of reverse-bias transient-overstress tests on high-resistivity (10 ..cap omega..cm) cells demonstrated that the predominant failure mode was due to edge currents. These flat-plate cells failed at currents of only 4 to 20 A, which is one or two orders of magnitude below the model predictions. It thus appears that high-resistivity flat-plate cells are quite vulnerable to electrical overstress which could be produced by a variety of mechanisms.

Pease, R.L.; Barnum, J.R.; van Lint, V.A.J.; Vulliet, W.V.; Wrobel, T.F.

1982-11-01T23:59:59.000Z

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

Unraveling the Role of Morphology on Organic Solar Cell Performance  

E-Print Network [OSTI]

Polymer based organic photovoltaic (OPV) technology offers a relatively inexpensive option for solar energy conversion provided its efficiency increases beyond the current level (6-7%) along with significant improvements in operational lifetime. The critical aspect of such solar cells is the complex morphology of distributed bulk heterojunctions, which plays the central role in the conversion of photo-generated excitons to electron-hole pairs. However, the fabrication conditions that can produce the optimal morphology are still unknown due to the lack of quantitative understanding of the effects of process variables on the cell morphology. In this article, we develop a unique process-device co-simulation framework based on phase-field model for phase separation coupled with self-consistent drift-diffusion transport to quantitatively explore the effects of the process conditions (e.g., annealing temperature, mixing ratio, anneal duration) on the organic solar cell performance. Our results explain experimentally observed trends of open circuit voltage and short circuit current that would otherwise be deemed anomalous from the perspective of conventional solar cells. In addition to providing an optimization framework for OPV technology, our morphology-aware modeling approach is ideally suited for a wide class of problems involving porous materials, block co-polymers, polymer colloids, OLED devices etc.

Biswajit Ray; Pradeep R. Nair; Muhammad A. Alam

2010-11-03T23:59:59.000Z

222

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

223

Photovoltaic nanocrystal scintillators hybridized on Si solar cells  

E-Print Network [OSTI]

Photovoltaic nanocrystal scintillators hybridized on Si solar cells for enhanced conversion@bilkent.edu.tr Abstract: We propose and demonstrate semiconductor nanocrystal based photovoltaic scintillators integrated on solar cells to enhance photovoltaic device parameters including spectral responsivity, open circuit

Demir, Hilmi Volkan

224

High temperature investigations of crystalline silicon solar cell materials  

E-Print Network [OSTI]

Crystalline silicon solar cells are a promising candidate to provide a sustainable, clean energy source for the future. In order to bring about widespread adoption of solar cells, much work is needed to reduce their cost. ...

Hudelson, George David Stephen, III

2009-01-01T23:59:59.000Z

225

Metal electrode for amorphous silicon solar cells  

DOE Patents [OSTI]

An amorphous silicon solar cell having an N-type region wherein the contact to the N-type region is composed of a material having a work function of about 3.7 electron volts or less. Suitable materials include strontium, barium and magnesium and rare earth metals such as gadolinium and yttrium.

Williams, Richard (Princeton, NJ)

1983-01-01T23:59:59.000Z

226

EE580 Solar Cells Todd J. Kaiser  

E-Print Network [OSTI]

­ Unleashes electrical energy ­ Unpredictable ­ Destructive · Harnesses electrical energy for human· Harnesses of Electrical Principles · Electric Charge · Electric Current · Electric Fields · Electric Potential Difference University: Solar Cells Lecture 7: EE Fundamentals Electric Potential Difference (Voltage) · Charges

Kaiser, Todd J.

227

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

228

An Unconventional Route to High-Efficiency Dye-Sensitized Solar Cells via Embedding Graphitic Thin Films into TiO2 Nanoparticle  

E-Print Network [OSTI]

An Unconventional Route to High-Efficiency Dye-Sensitized Solar Cells via Embedding Graphitic Thin into the conventional dye- sensitized solar cells (DSSCs), resulting in a remarkably improved cell efficiency due to its followed by direct carbonization. For dye-sensitized TiO2 based solar cells containing carbon/TiO2 thin

Lin, Zhiqun

229

Assessing Possibilities & Limits for Solar Cells  

E-Print Network [OSTI]

What are the solar cell efficiencies that we can strive towards? We show here that several simple criteria, based on cell and module performance data, serve to evaluate and compare all types of today's solar cells. Analyzing these data allows to gauge in how far significant progress can be expected for the various cell types and, most importantly from both the science and technology points of view, if basic bounds, beyond those known today, may exist, that can limit such progress. This is important, because half a century after Shockley and Queisser (SQ) presented limits, based on detailed balance calculations for single absorber solar cells, those are still held to be the only ones, we need to consider; most efforts to go beyond SQ are directed towards attempts to circumvent them, primarily via smart optics, or optoelectronics. After formulating the criteria and analyzing known loss mechanisms, use of such criteria suggests - additional limits for newer types of cells, Organic and Dye-Sensitized ones, and th...

Nayak, Pabitra K; Cahen, David

2011-01-01T23:59:59.000Z

230

Light Trapping for High Efficiency Heterojunction Crystalline Si Solar Cells: Preprint  

SciTech Connect (OSTI)

Light trapping plays an important role to achieve high short circuit current density (Jsc) and high efficiency for amorphous/crystalline Si heterojunction solar cells. Si heterojunction uses hydrogenated amorphous Si for emitter and back contact. This structure of solar cell posses highest open circuit voltage of 0.747 V at one sun for c-Si based solar cells. It also suggests that over 25% record-high efficiency is possible with further improvement of Jsc. Light trapping has two important tasks. The first one is to reduce the surface reflectance of light to zero for the solar spectrum that Si has a response. The second one is to increase the effective absorption length to capture all the photon. For Si heterojunction solar cell, surface texturing, anti-reflectance indium tin oxides (ITO) layer at the front and back are the key area to improve the light trapping.

Wang, Q.; Xu, Y.; Iwaniczko, E.; Page, M.

2011-04-01T23:59:59.000Z

231

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

232

ZnO Nanotube Based Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

ZnO Nanotube Based Dye-Sensitized Solar Cells Alex B. F. Martinson,, Jeffrey W. Elam, Joseph T templated by anodic aluminum oxide for use in dye-sensitized solar cells (DSSCs). Atomic layer deposition of the best dye- sensitized solar cells (DSSCs) is the product of a dye with moderate extinction

233

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.

234

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

235

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

236

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

237

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

238

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

239

Nanopillar Photovoltaics: Photon Management and Junction Engineering for Next-Generation Solar Cells  

E-Print Network [OSTI]

plasmon-enhanced dye- sensitized solar cells through metalnanostructure- based or dye-sensitized solar cells represent

Mariani, Giacomo

2013-01-01T23:59:59.000Z

240

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

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

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

242

Low cost manufacturing of light trapping features on multi-crystalline silicon solar cells : jet etching method and cost analysis  

E-Print Network [OSTI]

An experimental study was conducted in order to determine low cost methods to improve the light trapping ability of multi-crystalline solar cells. We focused our work on improving current wet etching methods to achieve the ...

Berrada Sounni, Amine

2010-01-01T23:59:59.000Z

243

Deng & Schiff, Amorphous Silicon Based Solar Cells rev. 7/30/2002, Page 1 Amorphous Silicon Based Solar Cells  

E-Print Network [OSTI]

Deng & Schiff, Amorphous Silicon Based Solar Cells rev. 7/30/2002, Page 1 Amorphous Silicon Based Solar Cells Xunming Deng and Eric A. Schiff Table of Contents 1 Overview 3 1.1 Amorphous Silicon: The First Bipolar Amorphous Semiconductor 3 1.2 Designs for Amorphous Silicon Solar Cells: A Guided Tour 6

Deng, Xunming

244

ELEG620: Solar Electric Systems University of Delaware, ECE Spring 2008 C. Honsberg Solar Cell Operation  

E-Print Network [OSTI]

is lost as heat. energy Eg 2 31 Absorption process #12;ELEG620: Solar Electric Systems UniversityELEG620: Solar Electric Systems University of Delaware, ECE Spring 2008 C. Honsberg Solar Cell and shunt resistance). #12;ELEG620: Solar Electric Systems University of Delaware, ECE Spring 2008 C

Honsberg, Christiana

245

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...

246

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

247

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 materials­2077). Given the proposed scales of PV adoption, the health and environmental impacts of PV technology should also be considered. This project would examine the proposed solar cell materials and designs and create

Iglesia, Enrique

248

US polycrystalline thin film solar cells program  

SciTech Connect (OSTI)

The Polycrystalline Thin Film Solar Cells Program, part of the United States National Photovoltaic Program, performs R D on copper indium diselenide and cadmium telluride thin films. The objective of the Program is to support research to develop cells and modules that meet the US Department of Energy's long-term goals by achieving high efficiencies (15%-20%), low-cost ($50/m{sup 2}), and long-time reliability (30 years). The importance of work in this area is due to the fact that the polycrystalline thin-film CuInSe{sub 2} and CdTe solar cells and modules have made rapid advances. They have become the leading thin films for PV in terms of efficiency and stability. The US Department of Energy has increased its funding through an initiative through the Solar Energy Research Institute in CuInSe{sub 2} and CdTe with subcontracts to start in Spring 1990. 23 refs., 5 figs.

Ullal, H.S.; Zweibel, K.; Mitchell, R.L. (Solar Energy Research Inst., Golden, CO (USA)) [Solar Energy Research Inst., Golden, CO (USA)

1989-11-01T23:59:59.000Z

249

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

250

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

251

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

252

Bifacial solar cell with SnS absorber by vapor transport deposition  

SciTech Connect (OSTI)

The SnS absorber layer in solar cell devices was produced by vapor transport deposition (VTD), which is a low-cost manufacturing method for solar modules. The performance of solar cells consisting of Si/Mo/SnS/ZnO/indium tin oxide (ITO) was limited by the SnS layer's surface texture and field-dependent carrier collection. For improved performance, a fluorine doped tin oxide (FTO) substrate was used in place of the Mo to smooth the topography of the VTD SnS and to make bifacial solar cells, which are potentially useful for multijunction applications. A bifacial SnS solar cell consisting of glass/FTO/SnS/CdS/ZnO/ITO demonstrated front- and back-side power conversion efficiencies of 1.2% and 0.2%, respectively.

Wangperawong, Artit [Stanford University, Stanford, California 94305 (United States); Department of Electrical Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Bangkok 10140 (Thailand); Hsu, Po-Chun; Yee, Yesheng; Herron, Steven M.; Clemens, Bruce M.; Cui, Yi; Bent, Stacey F., E-mail: sbent@stanford.edu [Stanford University, Stanford, California 94305 (United States)

2014-10-27T23:59:59.000Z

253

Enhanced efficiency of graphene-silicon Schottky junction solar cells by doping with Au nanoparticles  

SciTech Connect (OSTI)

We have reported a method to enhance the performance of graphene-Si (Gr/Si) Schottky junction solar cells by introducing Au nanoparticles (NPs) onto the monolayer graphene and few-layer graphene. The electron transfer between Au NPs and graphene leads to the increased work function and enhanced electrical conductivity of graphene, resulting in a remarkable improvement of device efficiency. By optimizing the initial thickness of Au layers, the power conversion efficiency of Gr/Si solar cells can be increased by more than three times, with a maximum value of 7.34%. These results show a route for fabricating efficient and stable Gr/Si solar cells.

Liu, X.; Zhang, X. W., E-mail: xwzhang@semi.ac.cn; Yin, Z. G.; Meng, J. H.; Gao, H. L.; Zhang, L. Q.; Zhao, Y. J.; Wang, H. L. [Key Lab of Semiconductor Materials Science, Institute of Semiconductors, CAS, Beijing 100083 (China)

2014-11-03T23:59:59.000Z

254

Enhanced performance of polymer:fullerene bulk heterojunction solar cells upon graphene addition  

SciTech Connect (OSTI)

Graphene has potential for applications in solar cells. We show that the short circuit current density of P3HT (Poly(3-hexylthiophene-2,5-diyl):PCBM((6,6)-Phenyl C61 butyric acid methyl ester) solar cells is enhanced by 10% upon the addition of graphene, with a 15% increase in the photon to electric conversion efficiency. We discuss the performance enhancement by studying the crystallization of P3HT, as well as the electrical transport properties. We show that graphene improves the balance between electron and hole mobilities with respect to a standard P3HT:PCBM solar cell.

Robaeys, Pieter, E-mail: pieter.robaeys@uhasselt.be; Dierckx, Wouter; Dexters, Wim; Spoltore, Donato; Drijkoningen, Jeroen [Institute for Materials Research (IMO), Hasselt University (Belgium); Bonaccorso, Francesco [Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, Cambridge (United Kingdom); Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, 16163 Genova (Italy); Bourgeois, Emilie; D'Haen, Jan; Haenen, Ken; Manca, Jean V.; Nesladek, Milos [Institute for Materials Research (IMO), Hasselt University (Belgium); IMOMEC, IMEC vzw (Belgium); Liesenborgs, Jori; Van Reeth, Frank [Expertise centre for Digital Media (EDM), Hasselt University (Belgium); Lombardo, Antonio; Ferrari, Andrea C. [Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, Cambridge (United Kingdom)

2014-08-25T23:59:59.000Z

255

Evaluation of concentration solar cells for terrestrial applications  

E-Print Network [OSTI]

Solar energy has become a hot prospect for the future replacement of fossil fuels, which have limited reserves and cause environmental problems. Solar cell is such a device to directly generate electricity from this clean ...

An, Tao, M. Eng. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

256

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network [OSTI]

efficiency of solar panels and power to weight ratio insolar cells, there exist two basic processes to convert sunlight power topower to a load connected when charged by Sun. The typical output voltage of a silicon based solar

Shao, Qinghui

2009-01-01T23:59:59.000Z

257

End-Capping Effect of a Narrow Bandgap Conjugated Polymer on Bulk Heterojunction Solar Cells  

SciTech Connect (OSTI)

Device performances of BHJ solar cells based on poly[(4,4-didodecyldithieno[3,2-b:2,3-d]silole)-2,6-diyl-alt-(2,1,3-benzoxadiazole)-4,7-diyl]and PC??BM improve by capping the chain ends with thiophene fragments. This structural modification yields materials that are more thermally robust and that can be used in devices with thicker films important considerations for enabling the mass production of plastic solar cells.

Park, Jin Kuen [Univ. of California, Santa Barbara, CA (United States); Jo, Jang [Univ. of California, Santa Barbara, CA (United States); Seo, Jung Hwa [Univ. of California, Santa Barbara, CA (United States); Moon, Ji Seo [Univ. of California, Santa Barbara, CA (United States); Park, Yeong Don [Univ. of California, Santa Barbara, CA (United States); Lee, Kwanghee [Gwangiu Inst. of Science and Technology (Korea); Heeger, Alan J. [Univ. of California, Santa Barbara, CA (United States); Bazan, Guillermo C. [Univ. of California, Santa Barbara, CA (United States)

2011-06-03T23:59:59.000Z

258

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

259

TOWARDS AN IMPROVED HIGH RESOLUTION GLOBAL LONG-TERM SOLAR RESOURCE DATABASE  

E-Print Network [OSTI]

TOWARDS AN IMPROVED HIGH RESOLUTION GLOBAL LONG- TERM SOLAR RESOURCE DATABASE Paul W. Stackhouse and test an improved production system that will enable the longest-term global solar resource database

Perez, Richard R.

260

Novel Approach for Selective Emitter Formation and Front Side Metallization of Crystalline Silicon Solar Cells  

SciTech Connect (OSTI)

In this project we will explore the possibility of forming the front side metallization and selective emitter layer for the crystalline silicon solar cells through using selective laser ablation to create contact openings on the front surface and a screen printer to make connections with conductive paste. Using this novel approach we expect to reduce the specific contact resistance of the silver gridlines by about one order of magnitude compared to the state-of-art industrial crystalline silicon solar cells to below 1 m??cm2, and use lightly doped n+ emitter layer with sheet resistance of not smaller than 100 ?/?. This represents an enabling improvement on crystalline silicon solar cell performance and can increase the absolute efficiency of the solar cell by about 1%. In this scientific report we first present our result on the selective laser ablation of the nitride layer to make contact openings. Then we report our work on the solar cell fabrication by using the laser ablated contact openings with self-doping paste. Through various electrical property characterization and SIMS analysis, the factors limiting the cell performance have been discussed. While through this proof-of-concept project we could not reach the target on cell efficiency improvement, the process to fabricate 125mm full-sized silicon solar cells using laser ablation and self-doping paste has been developed, and a much better understanding of technical challenges has been achieved. Future direction to realize the potential of the new technology has been clearly defined.

Baomin Xu

2010-07-28T23:59:59.000Z

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

Light trapping in solar cells at the extreme coupling limit  

E-Print Network [OSTI]

We calculate the maximal absorption enhancement obtainable by guided mode excitation in a weakly absorbing dielectric slab over wide wavelength ranges. The slab mimics thin film silicon solar cells in the low absorption regime. We consider simultaneously wavelength-scale periodicity of the texture, small thickness of the film, modal properties of the guided waves and their confinement to the film. Also we investigate the effect of the incident angle on the absorption enhancement. Our calculations provide tighter bounds for the absorption enhancement but still significant improvement is possible. Our explanation of the absorption enhancement can help better exploitation of the guided modes in thin film devices.

Naqavi, Ali; Battaglia, Corsin; Herzig, Hans Peter; Ballif, Christophe

2012-01-01T23:59:59.000Z

262

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

263

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

264

Valuing the Time-Varying Electricity Production of Solar Photovoltaic Cells  

E-Print Network [OSTI]

Production of Solar Photovoltaic Cells Severin BorensteinProduction of Solar Photovoltaic Cells Severin Borenstein 1concerns is so- lar photovoltaic cells (PVs), which capture

Borenstein, Severin

2005-01-01T23:59:59.000Z

265

Si3AlP: A New Promising Material for Solar Cell Absorber Ji-Hui Yang,  

E-Print Network [OSTI]

Si3AlP: A New Promising Material for Solar Cell Absorber Ji-Hui Yang, Yingteng Zhai, Hengrui Liu, Shanghai 200433, P. R. China National Renewable Energy Laboratory, Golden, Colorado 80401, United States candidate for improving the performance of the existing Si-based solar cells. The understanding

Gong, Xingao

266

Nontoxic quantum dot research improves solar cells  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recoveryLaboratory | NationalJohnSecurity Complex Non-destructivePolicyNontoxic

267

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

268

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 cells stability and performance.en.wikipedia.org/wiki/Solar_cell_efficiency, accessed 10) J.

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

269

Enhancing solar cells with plasmonic nanovoids  

E-Print Network [OSTI]

E (2.13) Here m? is an approximation of the effective mass of each electron incor- porating the effects of the lattice potential and electron-electron interactions alongside ? the characteristic damping term. Considering a harmonic in- cident electric... of plasmonic electric field enhance- ments at 3.3 eV (a) and 2.5 eV (b) in spherical silver nanovoids surrounded by a non-absorbing dielectric. Nanovoid plasmonic solar cells are placed on top of these silver structures, harnessing the electric field...

Lal, Niraj Narsey

2012-07-03T23:59:59.000Z

270

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

271

Boosting Accuracy of Testing Multijunction Solar Cells (Fact Sheet)  

SciTech Connect (OSTI)

This NREL Highlight describes research into a more precise technology for measuring efficiency of concentrating solar cells, which will enable the industry to advance.

Not Available

2015-01-01T23:59:59.000Z

272

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

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

physical understanding, and performance-oriented engineering of colloidal quantum dot solar cells and light sensors. Bio: Ted Sargent received the B.Sc.Eng. (Engineering...

273

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,...

274

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

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

Center News Research Highlights Center Research News Media about Center Center Video Library Bisfuel Picture Gallery Putting together the full solar tandem cell 24 Oct 2012 Ben...

275

arsenide solar cells: Topics by E-print Network  

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

Pankaj J Edla; Dr. Bhupendra Gupta 92 Fully Solution-Processed Copper Chalcopyrite Thin Film Solar Cells: Materials Chemistry, Processing, and Device Physics University of...

276

arsenide solar cell: Topics by E-print Network  

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

Pankaj J Edla; Dr. Bhupendra Gupta 92 Fully Solution-Processed Copper Chalcopyrite Thin Film Solar Cells: Materials Chemistry, Processing, and Device Physics University of...

277

alloy solar cells: Topics by E-print Network  

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

Pankaj J Edla; Dr. Bhupendra Gupta 91 Fully Solution-Processed Copper Chalcopyrite Thin Film Solar Cells: Materials Chemistry, Processing, and Device Physics University of...

278

Simple Method Quantifies Recombination Pathways in Solar Cells (Fact Sheet)  

SciTech Connect (OSTI)

NREL's analytic equation uses open-circuit voltage data to determine how much recombination occurs via different channels in a solar cell.

Not Available

2013-09-01T23:59:59.000Z

279

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

280

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

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

Efficiency limits of quantum well solar cells  

E-Print Network [OSTI]

The quantum well solar cell (QWSC) has been proposed as a flexible means to ensuring current matching for tandem cells. This paper explores the further advantage afforded by the indication that QWSCs operate in the radiative limit because radiative contribution to the dark current is seen to dominate in experimental data at biases corresponding to operation under concentration. The dark currents of QWSCs are analysed in terms of a light and dark current model. The model calculates the spectral response (QE) from field bearing regions and charge neutral layers and from the quantum wells by calculating the confined densities of states and absorption coefficient, and solving transport equations analytically. The total dark current is expressed as the sum of depletion layer and charge neutral radiative and non radiative currents consistent with parameter values extracted from QE fits to data. The depletion layer dark current is a sum of Shockley-Read-Hall non radiative, and radiative contributions. The charge neu...

Connolly, J P; Barnham, K W J; Bushnell, D B; Tibbits, T N D; Roberts, J S

2010-01-01T23:59:59.000Z

282

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

283

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

284

Gallium arsenide-based ternary compounds and multi-band-gap solar cell research  

SciTech Connect (OSTI)

Aim of this contract is the achievement of a high-efficiency, low-cost solar cell. The basic approach to the problem is centered upon the heteroepitaxial growth of a III-V compound material onto a single-crystal silicon wafer. The growth technique employed is metalorganic chemical vapor deposition. The silicon wafer may serve as a mechanical substrate and ohmic contact for a single-junction device, or may contain a p-n junction of its own and form the bottom cell of a two junction tandem solar cell structure. The III-V material for the single-junction case is GaAs and for the two-junction case is either GaAlAs or GaAsP, either material having the proper composition to yield a band gap of approximately 1.7 eV. Results achieved in this contract include the following: (1) a 17.6% efficient GaAs-on-Si solar cell; (2) an 18.5% efficient GaAs-on-Si concentrator solar cell at 400 suns; (3) a 24.8% efficient GaAs-on-GaAs solar cell; (4) a 28.7% efficient GaAs-on-GaAs concentrator solar cell at 200 suns; (5) measurement of the effects of dislocation density and emitter doping on GaAs cells; and (6) improvements in the growth process to achieve reproducible thin AlGaAs window layers with low recombination velocities and environmental stability.

Vernon, S. (Spire Corp., Bedford, MA (United States))

1993-02-01T23:59:59.000Z

285

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

286

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

287

Emerging High-Efficiency Low-Cost Solar Cell Technologies  

E-Print Network [OSTI]

. A Manufacturing Cost Analysis Relevant to Photovoltaic Cells Fabricated with IIIEmerging High-Efficiency Low-Cost Solar Cell Technologies Mike McGehee Materials Science and Engineering Center for Advanced Molecular Photovoltaics Bay Area Photovoltaic Consortium Precourt Institute

McGehee, Michael

288

Hierarchically structured photoelectrodes for dye-sensitized solar cells  

E-Print Network [OSTI]

Hierarchically structured photoelectrodes for dye-sensitized solar cells Qifeng Zhang and Guozhong or one-dimensional assemblies. Introduction Dye-sensitized solar cells (DSCs) are a category Cao* DOI: 10.1039/c0jm04345a This paper highlights several significant achievements in dye-sensitized

Cao, Guozhong

289

Radial Electron Collection in Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

Radial Electron Collection in Dye-Sensitized Solar Cells Alex B. F. Martinson,, Jeffrey W. Elam photoelectrode architecture consisting of concentric conducting and semiconducting nanotubes for use in dye-sensitized solar cells (DSSCs). Atomic layer deposition is employed to grow indium tin oxide (ITO) within a porous

290

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

291

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.

292

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

293

Analysis of Solar Cell Quality Using Voltage Metrics: Preprint  

SciTech Connect (OSTI)

The highest efficiency solar cells provide both excellent voltage and current. Of these, the open-circuit voltage (Voc) is more frequently viewed as an indicator of the material quality. However, since the Voc also depends on the band gap of the material, the difference between the band gap and the Voc is a better metric for comparing material quality of unlike materials. To take this one step further, since Voc also depends on the shape of the absorption edge, we propose to use the ultimate metric: the difference between the measured Voc and the Voc calculated from the external quantum efficiency using a detailed balance approach. This metric is less sensitive to changes in cell design and definition of band gap. The paper defines how to implement this metric and demonstrates how it can be useful in tracking improvements in Voc, especially as Voc approaches its theoretical maximum.

Toberer, E. S.; Tamboli, A. C.; Steiner, M.; Kurtz, S.

2012-06-01T23:59:59.000Z

294

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

295

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

296

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

297

Kelvin Probe Force Microscopy for in situ Electrical Characterization of Organic Solar Cells  

E-Print Network [OSTI]

Kelvin Probe Force Microscopy for in situ Electrical Characterization of Organic Solar Cells., University of Pittsburgh The most efficient organic solar cell today is made from blending conjugated donors and acceptors in bulk heterojunction organic solar cells. Most microscopic characterization

Fisher, Frank

298

In Situ X-Ray Scattering Helps Optimize Printed Solar Cells  

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

In Situ X-Ray Scattering Helps Optimize Printed Solar Cells In Situ X-Ray Scattering Helps Optimize Printed Solar Cells Print Wednesday, 25 February 2015 00:00 Plastic solar cells...

299

Nanopillar Photovoltaics: Photon Management and Junction Engineering for Next-Generation Solar Cells  

E-Print Network [OSTI]

Towards efficient hybrid solar cells based on fully polymerSariciftci, N. S. Hybrid solar cells, Inorg. Chim. Acta 361,Y. , Warta, W. , Dunlop, E.D. Solar cell efficiency table (

Mariani, Giacomo

2013-01-01T23:59:59.000Z

300

Modeling and control of thin film surface morphology: application to thin film solar cells  

E-Print Network [OSTI]

of a p-i-n thin-film solar cell with front transparent con-for thin-film a-si:h solar cells. Progress in Photovoltaics,in thin-film silicon solar cells. Optics Communications,

Huang, Jianqiao

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.


301

Performance of Hydrogenated a-Si:H Solar Cells with Downshifting Coating: Preprint  

SciTech Connect (OSTI)

We apply a thin luminescent downshifting (LDS) coating to a hydrogenated amorphous Si (a-Si:H) solar cell and study the mechanism of possible current enhancement. The conversion material used in this study converts wavelengths below 400 nm to a narrow line around 615 nm. This material is coated on the front of the glass of the a-Si:H solar cell with a glass/TCO/p/i/n/Ag superstrate configuration. The initial efficiency of the solar cell without the LDS coating is above 9.0 % with open circuit voltage of 0.84 V. Typically, the spectral response below 400 nm of an a-Si:H solar cell is weaker than that at 615 nm. By converting ultraviolet (UV) light to red light, the solar cell will receive more red photons; therefore, solar cell performance is expected to improve. We observe evidence of downshifting in reflectance spectra. The cell Jsc decreases by 0.13 mA/cm2, and loss mechanisms are identified.

Nemeth, B.; Xu, Y.; Wang, H.; Sun, T.; Lee, B. G.; Duda, A.; Wang, Q.

2011-05-01T23:59:59.000Z

302

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

303

Review paper: Toward highly efficient quantum-dot-and dye-sensitized solar cells  

E-Print Network [OSTI]

Review paper: Toward highly efficient quantum-dot- and dye-sensitized solar cells Hongsik Choi Interface control Light harvesting Tandem solar cell a b s t r a c t Dye- and quantum-dot-sensitized solar technologies of silicon-based solar cells should be resolved [7]. Dye-sensitized solar cells (DSSCs) have been

Park, Byungwoo

304

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

305

Amorphous silicon/crystalline silicon heterojunctions: The future of high-efficiency silicon solar cells  

E-Print Network [OSTI]

;5 Record efficiencies #12;6 Diffused-junction solar cells Diffused-junction solar cell Chemical passivation to ~650 mV #12;7 Silicon heterojunction solar cells a-Si:H provides excellent passivation of c-Si surface Heterojunction solar cell Chemical passivation Chemical passivation #12;8 Voc and silicon heterojunction solar

Firestone, Jeremy

306

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: ##EQU1## 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.; Meyer, Gerald J.

2003-07-22T23:59:59.000Z

307

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

308

The analysis and optimization of a spherical silicon solar cell  

E-Print Network [OSTI]

silicon solar cell has been estimated using a cylindrical solar cell with some modifications as an approximate model. Calculations were made for both the cylindrical model and the conventional planar cell with the aid of a Fortran IV computer program... ln the p nnd n layers, respect lvely (cm I) N(X) monochromatic photon flux incident on the solar cell (cm g sec ~ o ) N 0 number of photons/cm sec with wavelengths shorter than l. lp (cm sec ) n po' no thermal equilibrium concentration...

McKee, William Randall

1976-01-01T23:59:59.000Z

309

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...

310

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

311

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

312

Effects of cell area on the performance of dye sensitized solar cell  

SciTech Connect (OSTI)

Dye sensitized solar cells (DSCs) have significant advantage over the current silicon cells by having low manufacturing cost and potentially high conversion efficiency. Therefore, DSCs are expected to be used as the next generation solar cell device that covers wide range of new applications. In order to achieve highly efficient DSCs for practical application, study on the effect of increasing the cells area on the performance of dye sensitized solar need to be carried out. Three different DSC cell areas namely, 1, 12.96 and 93.5 cm{sup 2} respectively were fabricated and analyzed through solar simulator and electrochemical impedance spectroscopy (EIS). From the analysis of electrochemical impedance spectroscopy (EIS), it was observed that the cells electron lifetime was influenced significantly by the cells area. Although the collection efficiency of all cells recorded to be approximately 100% but higher recombination rate with increased cell area reduced the performance of the cell.

Khatani, Mehboob, E-mail: mkhatani@hotmail.com, E-mail: noranimuti-mohamed@petronas.com.my, E-mail: hishmid@petronas.com.my, E-mail: azclement@yahoo.com, E-mail: aeska07@gmail.com; Mohamed, Norani Muti, E-mail: mkhatani@hotmail.com, E-mail: noranimuti-mohamed@petronas.com.my, E-mail: hishmid@petronas.com.my, E-mail: azclement@yahoo.com, E-mail: aeska07@gmail.com; Hamid, Nor Hisham, E-mail: mkhatani@hotmail.com, E-mail: noranimuti-mohamed@petronas.com.my, E-mail: hishmid@petronas.com.my, E-mail: azclement@yahoo.com, E-mail: aeska07@gmail.com; Sahmer, Ahmad Zahrin, E-mail: mkhatani@hotmail.com, E-mail: noranimuti-mohamed@petronas.com.my, E-mail: hishmid@petronas.com.my, E-mail: azclement@yahoo.com, E-mail: aeska07@gmail.com; Samsudin, Adel, E-mail: mkhatani@hotmail.com, E-mail: noranimuti-mohamed@petronas.com.my, E-mail: hishmid@petronas.com.my, E-mail: azclement@yahoo.com, E-mail: aeska07@gmail.com [Centre of Innovative Nanostructures and Nanodevices (COINN), UTP (Malaysia)

2014-10-24T23:59:59.000Z

313

Experiment Based Teaching of Solar Cell Operation and Characterization Using the SolarLab Platform  

E-Print Network [OSTI]

of Energy Technology, Aalborg University. Keywords: characterization, experiment based, modelling, solar (MSc and PhD level) taught at the Department of Energy Technology, Aalborg University. SOLAR CELL S. V. Spataru, D. Sera, T. Kerekes, R. Teodorescu Department of Energy Technology Aalborg University

Sera, Dezso

314

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

315

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

316

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

317

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

318

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

319

Advanced Nanomaterials for High-Efficiency Solar Cells  

SciTech Connect (OSTI)

Energy supply has arguably become one of the most important problems facing humankind. The exponential demand for energy is evidenced by dwindling fossil fuel supplies and record-high oil and gas prices due to global population growth and economic development. This energy shortage has significant implications to the future of our society, in addition to the greenhouse gas emission burden due to consumption of fossil fuels. Solar energy seems to be the most viable choice to meet our clean energy demand given its large scale and clean/renewable nature. However, existing methods to convert sun light into electricity are not efficient enough to become a practical alternative to fossil fuels. This DOE project aims to develop advanced hybrid nanomaterials consisting of semiconductor nanoparticles (quantum dots or QDs) supported on graphene for cost-effective solar cells with improved conversion efficiency for harvesting abundant, renewable, clean solar energy to relieve our global energy challenge. Expected outcomes of the project include new methods for low-cost manufacturing of hybrid nanostructures, systematic understanding of their properties that can be tailored for desired applications, and novel photovoltaic cells. Through this project, we have successfully synthesized a number of novel nanomaterials, including vertically-oriented graphene (VG) sheets, three-dimensional (3D) carbon nanostructures comprising few-layer graphene (FLG) sheets inherently connected with CNTs through sp{sup 2} carbons, crumpled graphene (CG)-nanocrystal hybrids, CdSe nanoparticles (NPs), CdS NPs, nanohybrids of metal nitride decorated on nitrogen-doped graphene (NG), QD-carbon nanotube (CNT) and QD-VG-CNT structures, TiO{sub 2}-CdS NPs, and reduced graphene oxide (RGO)-SnO{sub 2} NPs. We further assembled CdSe NPs onto graphene sheets and investigated physical and electronic interactions between CdSe NPs and the graphene. Finally we have demonstrated various applications of these nanomaterials in solar cells (both as photoanodes and counter electrodes), gas sensors, and energy storage devices. This research is potentially transformative since the availability of affordable hybrid nanostructures and their fundamental properties will enable various innovative applications of the multifunctional hybrid nanostructures and thus will accelerate new discoveries and inventions in nanoscience and nanotechnology.

Chen, Junhong [University of Wisconsin-Milwaukee] [University of Wisconsin-Milwaukee

2013-11-29T23:59:59.000Z

320

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

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

Strongly Correlated Electron Systems Functionalized for Solar Cells and Memristors  

E-Print Network [OSTI]

" #12;Grand Energy Challenge Gap between production and demand: ~14TW by 2050 Install one 1GW new power Demand total industrial developing US ee/fsu Energy source World Capacity Solar Geothermal Biomass Hydro Optimization of gap: max efficiency: 31% (Shockley Queisser 1961) In real PV cells 80-85% of incident solar

322

Infrared modulation spectroscopy of interfaces in amorphous silicon solar cells  

E-Print Network [OSTI]

Infrared modulation spectroscopy of interfaces in amorphous silicon solar cells Kai Zhu a,1 , E Solar, Toano, VA 23168, USA Abstract We report infrared depletion modulation spectra for near an infrared modulation spectroscopy technique that probes the optical spectra of dopants and defects

Schiff, Eric A.

323

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

324

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

325

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

326

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

E-Print Network [OSTI]

Solution-processed hybrid solar cells, a blend of conjugated polymers and semiconducting nanocrystals, are a promising candidate for next-generation energy-conversion devices. The renaissance of this field in recent years has yielded a much deeper...

Feng, Gao; Ren, Shenqiang; Jianpu, Wang

2013-06-12T23:59:59.000Z

327

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

328

Nanostructured architectures for colloidal quantum dot solar cells  

E-Print Network [OSTI]

This thesis introduces a novel ordered bulk heterojunction architecture for colloidal quantum dot (QD) solar cells. Quantum dots are solution-processed nanocrystals whose tunable bandgap energies make them a promising ...

Jean, Joel, S.M. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

329

Pokeberries Provide Boost for Solar Cells | Department of Energy  

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

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...

330

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

331

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

332

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...

333

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

334

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

E-Print Network [OSTI]

solar cell lead to a higher fill factor, therefore resulting in greater efficiency value, and bringing the cell's output power

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

335

Laser processing of nanocrystalline TiO2 films for dye-sensitized solar cells  

E-Print Network [OSTI]

Laser processing of nanocrystalline TiO2 films for dye-sensitized solar cells H. Kim,a) G. P­20 m thick) layers incorporated in dye-sensitized solar cells. Laser direct-write is a laser techniques to produce porous nc- TiO2 films required for dye-sensitized solar cells. The dye solar cells

Arnold, Craig B.

336

Planar Waveguide-Nanowire Integrated Three-Dimensional Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

Planar Waveguide-Nanowire Integrated Three-Dimensional Dye-Sensitized Solar Cells Yaguang Wei, Chen to fabricate three-dimensional (3D) dye-sensitized solar cells (DSSCs) by integrating planar optical waveguide cells that can be expanded to organic- and inorganic-based solar cells. KEYWORDS Dye-sensitized solar

Wang, Zhong L.

337

Increased light harvesting in dye-sensitized solar cells with energy relay dyes  

E-Print Network [OSTI]

Increased light harvesting in dye-sensitized solar cells with energy relay dyes Brian E. Hardin1 factors. However, dye-sensitized solar cells do not completely absorb all of the photons from the visible pathway to develop more efficient dye-sensitized solar cells. D ye-sensitized solar cells (DSCs) work

McGehee, Michael

338

The construction of tandem dye-sensitized solar cells from chemically-derived nanoporous photoelectrodes  

E-Print Network [OSTI]

The construction of tandem dye-sensitized solar cells from chemically-derived nanoporous Available online 24 October 2014 Keywords: Tandem solar cell Selective etching Dye-sensitized solar cell Nanoporous electrode a b s t r a c t A tandem dye-sensitized solar cell (tandem-DSSC) was synthesized

Park, Byungwoo

339

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

E-Print Network [OSTI]

Rational design of hybrid dye-sensitized solar cells composed of double-layered photoanodes,a Bailiang Xue,b Wei Liu,c Zhiqun Lina and Yulin Deng*bc A uniquely structured dye-sensitized solar cell tandem solar cells, leading to higher power conversion efficiency. Dye-sensitized solar cells (DSSCs

Lin, Zhiqun

340

Enhanced Photovoltaic Performance of Nanostructured Hybrid Solar Cell Using Highly Oriented TiO2 Nanotubes  

E-Print Network [OSTI]

-called third generation of solar cells including dye-sensitized solar cells, DSCs2,3 and organic phoEnhanced Photovoltaic Performance of Nanostructured Hybrid Solar Cell Using Highly Oriented TiO2 nanotubes can be effectively controlled for the suitable use for a hybrid solar cell by varying the diameter

Cao, Guozhong

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

Organic solar cells: An overview focusing on active layer morphology Travis L. Benanti & D. Venkataraman*  

E-Print Network [OSTI]

Review Organic solar cells: An overview focusing on active layer morphology Travis L. Benanti & D/acceptor blend, morphology, photovoltaic devices, plastic solar cells, thin films Abstract Solar cells heterojunction concept. This review provides an overview of organic solar cells. Topics covered include: a brief

Venkataraman, Dhandapani "DV"

342

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.

343

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.

344

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.

345

Molecular Packing and Solar Cell Performance in Blends of Polymers with a Bisadduct Fullerene  

E-Print Network [OSTI]

as the electron acceptor in some BHJ solar cells but not in others. We first determine the solar cell performanceMolecular Packing and Solar Cell Performance in Blends of Polymers with a Bisadduct Fullerene States *S Supporting Information ABSTRACT: We compare the solar cell performance of several polymers

McGehee, Michael

346

Microstructured anti-reflection surface design for the omni-directional solar cells  

E-Print Network [OSTI]

Microstructured anti-reflection surface design for the omni-directional solar cells Li Chen for the formation of hemispherical structures as an omni-directional anti-reflection (omni-AR) coating in solar cell current in such hemispherical solar cells hence enhanced to 1.5 times of bulk silicon solar cells

Zhou, Weidong

347

DISSERTATION Investigation of Spatial Variations in Collection Efficiency of Solar Cells  

E-Print Network [OSTI]

DISSERTATION Investigation of Spatial Variations in Collection Efficiency of Solar Cells Submitted BY JASON F. HILTNER ENTITLED INVESTIGATION OF SPATIAL VARIATIONS IN COLLECTION EFFICIENCY OF SOLAR CELLS OF SOLAR CELLS In an effort to investigate spatial variations in solar cells, an apparatus which is capable

Sites, James R.

348

Design and fabrication of photonic crystals in epitaxial free silicon for ultrathin solar cells  

E-Print Network [OSTI]

Design and fabrication of photonic crystals in epitaxial free silicon for ultrathin solar cells photovoltaic solar cell. Optical simulations performed on a complete solar cell revealed that patterning to obtain ultrathin patterned solar cells. Keywords: Photonic crystals; Epitaxial crystalline silicon; Thin

Paris-Sud XI, Université de

349

DESIGN APPROACHES AND MATERIALS PROCESSES FOR ULTRAHIGH EFFICIENCY LATTICE MISMATCHED MULTI-JUNCTION SOLAR CELLS  

E-Print Network [OSTI]

-JUNCTION SOLAR CELLS Melissa J. Griggs 1 , Daniel C. Law 2 , Richard R. King 2 , Arthur C. Ackerman 3 , James M heterostructures grown in a multi-junction solar cell-like structure by MOCVD. Initial solar cell data are also of the minority carrier lifetime. INTRODUCTION High efficiency triple junction solar cells have recently been

Atwater, Harry

350

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

351

X-ray absorption spectroscopy of biomimetic dye molecules for solar cells Peter L. Cook,1  

E-Print Network [OSTI]

X-ray absorption spectroscopy of biomimetic dye molecules for solar cells Peter L. Cook,1 Xiaosong November 2009 Dye-sensitized solar cells are potentially inexpensive alternatives to traditional semiconductor solar cells. In order to optimize dyes for solar cells we systematically investigate

Himpsel, Franz J.

352

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

353

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

354

Enhanced performance of quantum dot solar cells based on type II quantum dots  

SciTech Connect (OSTI)

The characteristics of quantum dot solar cells (QDSCs) based on type II QDs are investigated theoretically. Based on a drift-diffusion model, we obtained a much higher open circuit voltage (V{sub oc}) as well as conversion efficiency in a type II QDSC, compared to type I QDSCs. The improved V{sub oc} and efficiency are mainly attributed to the much longer Auger recombination lifetime in type II QDs. Moreover, the influence of the carrier lifetime on devices' performance is discussed and clarified. In addition, an explicit criterion to determine the role of quantum dots in solar cells is put forward.

Xu, Feng; Yang, Xiao-Guang; Luo, Shuai; Lv, Zun-Ren; Yang, Tao, E-mail: tyang@semi.ac.cn [Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083 (China)

2014-10-07T23:59:59.000Z

355

Recent technological advances in thin film solar cells  

SciTech Connect (OSTI)

High-efficiency, low-cost thin film solar cells are an exciting photovoltaic technology option for generating cost-effective electricity in 1995 and beyond. This paper reviews the substantial advances made by several thin film solar cell technologies, namely, amorphous silicon, copper indium diselenide, cadmium telluride, and polycrystalline silicon. Recent examples of utility demonstration projects of these emerging materials are also discussed. 8 refs., 4 figs.

Ullal, H.S.; Zwelbel, K.; Surek, T.

1990-03-01T23:59:59.000Z

356

Nanoantennas for enhanced light trapping in transparent organic solar cells  

E-Print Network [OSTI]

We propose a light-trapping structure offering a significant enhancement of photovoltaic absorption in transparent organic solar cells operating at infrared while the visible light transmission keeps sufficiently high. The main mechanism of light trapping is related with the excitation of collective oscillations of the metal nanoantenna arrays, characterized by advantageous field distribution in the volume of the solar cell. It allows more than triple increase of infrared photovoltaic absorption.

Voroshilov, Pavel M; Belov, Pavel A

2014-01-01T23:59:59.000Z

357

Thermodynamics of photon-enhanced thermionic emission solar cells  

SciTech Connect (OSTI)

Photon-enhanced thermionic emission (PETE) cells in which direct photon energy as well as thermal energy can be harvested have recently been suggested as a new candidate for high efficiency solar cells. Here, we present an analytic thermodynamical model for evaluation of the efficiency of PETE solar cells including an analysis of the entropy production due to thermionic emission of general validity. The model is applied to find the maximum efficiency of a PETE cell for given cathode and anode work functions and temperatures.

Reck, Kasper, E-mail: kasper.reck@nanotech.dtu.dk [Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech Building 345E, Kgs. Lyngby 2800 (Denmark); Hansen, Ole, E-mail: ole.hansen@nanotech.dtu.dk [Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech Building 345E, Kgs. Lyngby 2800 (Denmark); CINF Center for Individual Nanoparticle Functionality, Technical University of Denmark, Kgs. Lyngby 2800 (Denmark)

2014-01-13T23:59:59.000Z

358

Fabrication and Characterization of Organic Solar Cells  

E-Print Network [OSTI]

processablepolymerphotovoltaiccellsbyself?organizationPhotodiodes, and Photovoltaic Cells. AppliedPhysicsF, Heeger AJ. Polymer Photovoltaic Cells ? Enhanced

Yengel, Emre

2010-01-01T23:59:59.000Z

359

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

360

High-performance porous silicon solar cell development. Final report, October 1, 1993--September 30, 1995  

SciTech Connect (OSTI)

The goal of the program was to demonstrate use of porous silicon in new solar cell structures. Porous silicon technology has been developed at Spire for producing visible light-emitting diodes (LEDs). The major aspects that they have demonstrated are the following: porous silicon active layers have been made to show photovoltaic action; porous silicon surface layers can act as antireflection coatings to improve the performance of single-crystal silicon solar cells; and porous silicon surface layers can act as antireflection coatings on polycrystalline silicon solar cells. One problem with the use of porous silicon is to achieve good lateral conduction of electrons and holes through the material. This shows up in terms of poor blue response and photocurrents which increase with increasing reverse bias applied to the diode.

Maruska, P. [Spire Corp., Bedford, MA (United States)] [Spire Corp., Bedford, MA (United States)

1996-09-01T23:59:59.000Z

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.


361

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

362

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 PV coatings based on CdTe. ...for transparent window PV:...for transparent window PV: , p g · The X26 for ultrathin CdTe · X26 PV window coatings (250 500 nm of CdTe) are attractive very low cost and· X26 PV window

Rollins, Andrew M.

363

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

364

The mission of the UC Davis Solar Collaborative is simple: to find ways to make solar cells more efficient. Even in theory, the efficiency of conventional solar cells is limited to a disappointing 31%. However, this limit is based  

E-Print Network [OSTI]

Mission The mission of the UC Davis Solar Collaborative is simple: to find ways to make solar cells more efficient. Even in theory, the efficiency of conventional solar cells is limited to a disappointing 31%. However, this limit is based on the traditional operation of solar cells, where an incoming

365

Real time intelligent process control system for thin film solar cell manufacturing  

SciTech Connect (OSTI)

This project addresses the problem of lower solar conversion efficiency and waste in the typical solar cell manufacturing process. The work from the proposed development will lead toward developing a system which should be able to increase solar panel conversion efficiency by an additional 12-15% resulting in lower cost panels, increased solar technology adoption, reduced carbon emissions and reduced dependency on foreign oil. All solar cell manufacturing processes today suffer from manufacturing inefficiencies that currently lead to lower product quality and lower conversion efficiency, increased product cost and greater material and energy consumption. This results in slower solar energy adoption and extends the time solar cells will reach grid parity with traditional energy sources. The thin film solar panel manufacturers struggle on a daily basis with the problem of thin film thickness non-uniformity and other parameters variances over the deposited substrates, which significantly degrade their manufacturing yield and quality. Optical monitoring of the thin films during the process of the film deposition is widely perceived as a necessary step towards resolving the non-uniformity and non-homogeneity problem. In order to enable the development of an optical control system for solar cell manufacturing, a new type of low cost optical sensor is needed, able to acquire local information about the panel under deposition and measure its local characteristics, including the light scattering in very close proximity to the surface of the film. This information cannot be obtained by monitoring from outside the deposition chamber (as traditional monitoring systems do) due to the significant signal attenuation and loss of its scattering component before the reflected beam reaches the detector. In addition, it would be too costly to install traditional external in-situ monitoring systems to perform any real-time monitoring over large solar panels, since it would require significant equipment refurbishing needed for installation of multiple separate ellipsometric systems, and development of customized software to control all of them simultaneously. The proposed optical monitoring system comprises AccuStratas fiber optics sensors installed inside the thin film deposition equipment, a hardware module of different components (beyond the scope of this project) and our software program with iterative predicting capability able to control material bandgap and surface roughness as films are deposited. Our miniature fiber optics monitoring sensors are installed inside the vacuum chamber compartments in very close proximity where the independent layers are deposited (an option patented by us in 2003). The optical monitoring system measures two of the most important parameters of the photovoltaic thin films during deposition on a moving solar panel - material bandgap and surface roughness. In this program each sensor array consists of two fiber optics sensors monitoring two independent areas of the panel under deposition. Based on the monitored parameters and their change in time and from position to position on the panel, the system is able to provide to the equipment operator immediate information about the thin films as they are deposited. This DoE Supply Chain program is considered the first step towards the development of intelligent optical control system capable of dynamically adjusting the manufacturing process on-the-fly in order to achieve better performance. The proposed system will improve the thin film solar cell manufacturing by improving the quality of the individual solar cells and will allow for the manufacturing of more consistent and uniform products resulting in higher solar conversion efficiency and manufacturing yield. It will have a significant impact on the multibillion-dollar thin film solar market. We estimate that the financial impact of these improvements if adopted by only 10% of the industry ($7.7 Billion) would result in about $1.5 Billion in savings by 2015 (at the assumed 20% improvement). This can b

George Atanasoff

2010-10-29T23:59:59.000Z

366

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. 15 figs.

Rockett, A.A.; Yang, L.C.

1995-12-19T23:59:59.000Z

367

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

368

Method Of Making Solar Collectors By In-Situ Encapsulation Of Solar Cells  

DOE Patents [OSTI]

A method of making solar collectors by encapsulating photovoltaic cells within a base of an elongated solar collector wherein heat and pressure are applied to the cells in-situ, after an encapsulating material has been applied. A tool is fashioned having a bladder expandable under gas pressure, filling a region of the collector where the cells are mounted. At the same time, negative pressure is applied outside of the bladder, enhancing its expansion. The bladder presses against a platen which contacts the encapsulated cells, causing outgassing of the encapsulant, while heat cures the encapsulant. After curing, the bladder is deflated and the tool may be removed from the collector and base and reflective panels put into place, if not already there, thereby allowing the solar collector to be ready for use.

Carrie, Peter J. (Toronto, CA); Chen, Kingsley D. D. (Markham, CA)

2000-10-24T23:59:59.000Z

369

Molten carbonate fuel cell technology improvement  

SciTech Connect (OSTI)

This report summarizes the work performed under Department of Energy Contract DEAC21-87MC23270, Molten Carbonate Fuel Cell Technology Improvement.'' This work was conducted over a three year period and consisted of three major efforts. The first major effort was the power plant system study which reviewed the competitive requirements for a coal gasifier/molten carbonate fuel cell power plant, produced a conceptual design of a CG/MCFC, and defined the technology development requirements. This effort is discussed in Section 1 of the report. The second major effort involved the design and development of a new MCFC cell configuration which reduced the material content of the cell to a level competitive with competing power plants, simplified the cell configuration to make the components more manufacturable and adaptable to continuous low cost processing techniques, and introduced new-low-pressure drop flow fields for both reactant gases. The new flow fields permitted the incorporation of recirculation systems in both reactant gas systems, permitting simplified cooling techniques and the ability to operate on both natural gas and a wide variety of gasifier fuels. This cell technology improvement is discussed in Section 2. The third major effort involved the scaleup of the new cell configuration to the full-area, 8-sq-ft size and resulted in components used for a 25-kW, 20-cell stack verification test. The verification test was completed with a run of 2200 hours, exceeding the goal of 2000 hours and verifying the new cell design. TWs test, in turn, provided the confidence to proceed to a 100-kW demonstration which is the goal of the subsequent DOE program. The scaleup and stack verification tests are discussed in Sections 3, 4, 5, and 6 of this report.

Not Available

1991-06-01T23:59:59.000Z

370

Plasmonic Enhancement of Dye-Sensitized Solar Cells Using Core-Shell-Shell Nanostructures  

E-Print Network [OSTI]

Plasmonic Enhancement of Dye-Sensitized Solar Cells Using Core- Shell-Shell Nanostructures Stafford and demonstrate near-field plasmonic enhancement of dye-sensitized solar cells (DSSCs) incorporating them being researched, dye-sensitized solar cells (DSSCs) are a promising alternative to traditional solar

371

Dye-Sensitized Solar Cells DOI: 10.1002/anie.201300070  

E-Print Network [OSTI]

Dye-Sensitized Solar Cells DOI: 10.1002/anie.201300070 Stable Dye-Sensitized Solar Cell,* and Udo Bach* Dye-sensitized solar cells (DSCs) can be fabricated from low- cost components with simple fields, including renewable energy research focusing on DSCs and solar-driven hydrogen generation from

372

NREL scientists develop near-field optical microscopy techniques for imaging solar cell junctions and identify  

E-Print Network [OSTI]

and Characterization team examined local junction breakdown in silicon and thin-film solar cells by electroluminescenceNREL scientists develop near-field optical microscopy techniques for imaging solar cell junctions is an increasingly important issue for silicon solar cells. The issue has taken center stage now that the solar

373

Identification, Characterization, and Implications of Shadow Degradation in Thin Film Solar Cells  

E-Print Network [OSTI]

cells [4]. The problem of shadowing of solar panels has been studied for quite some time; however of a solar cell, showing the dark and light current components. (b) The series connection in a solar panelIdentification, Characterization, and Implications of Shadow Degradation in Thin Film Solar Cells

Alam, Muhammad A.

374

The ultra-thin solar cells that could generate power through windows  

E-Print Network [OSTI]

The ultra-thin solar cells that could generate power through windows By Claire Bates Last updated, generating enough electricity to power the GPS or air conditioning. Solar cells, which convert solar energy into tinted windows Page 1 of 3The ultra-thin solar cells that could generate power through windows | Mail

Rogers, John A.

375

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

376

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

377

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

378

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

379

Electronic structure of QD arrays: Application to intermediate-band solar cells  

E-Print Network [OSTI]

)Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK Abstract-Intermediate band solar cells (IBSC) have the thermodynamic efficiency limits of solar energy conversion. While tandem solar cells can the- oretically exceedNUSOD 2007 Electronic structure of QD arrays: Application to intermediate-band solar cells S

380

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.


381

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

382

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...

383

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

384

Three dimensional amorphous silicon/microcrystalline silicon solar cells  

DOE Patents [OSTI]

Three dimensional deep contact amorphous silicon/microcrystalline silicon (a-Si/.mu.c-Si) solar cells 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.

Kaschmitter, James L. (Pleasanton, CA)

1996-01-01T23:59:59.000Z

385

Laminated photovoltaic modules using back-contact solar cells  

DOE Patents [OSTI]

Photovoltaic modules which comprise back-contact solar cells, such as back-contact crystalline silicon solar cells, positioned atop electrically conductive circuit elements affixed to a planar support so that a circuit capable of generating electric power is created. The modules are encapsulated using encapsulant materials such as EVA which are commonly used in photovoltaic module manufacture. The module designs allow multiple cells to be electrically connected in a single encapsulation step rather than by sequential soldering which characterizes the currently used commercial practices.

Gee, James M. (Albuquerque, NM); Garrett, Stephen E. (Albuquerque, NM); Morgan, William P. (Albuquerque, NM); Worobey, Walter (Albuquerque, NM)

1999-09-14T23:59:59.000Z

386

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

387

Single nanowire solar cells beyond the Shockley-Queisser limit  

E-Print Network [OSTI]

Light management is of great importance to photovoltaic cells, as it determines the fraction of incident light entering the device. An optimal pn-junction combined with an optimal light absorption can lead to a solar cell efficiency above the Shockley-Queisser limit. Here, we show how this is possible by studying photocurrent generation for a single core-shell p-i-n junction GaAs nanowire solar cell grown on a silicon substrate. At one sun illumination a short circuit current of 180 mA/cm^2 is obtained, which is more than one order of magnitude higher than what would be predicted from Lambert-Beer law. The enhanced light absorption is shown to be due to a light concentrating property of the standing nanowire as shown by photocurrent maps of the device. The results imply new limits for the maximum efficiency obtainable with III-V based nanowire solar cells under one sun illumination.

Krogstrup, Peter; Heiss, Martin; Demichel, Olivier; Holm, Jeppe V; Aagesen, Martin; Nygard, Jesper; Morral, Anna Fontcuberta i

2013-01-01T23:59:59.000Z

388

Optical design and efficiency improvement for organic luminescent solar concentrators  

E-Print Network [OSTI]

and hybrid photovoltaic/thermal solar conversation systems1 . Generally, an organic LSC is a piece of highly solar energy. We designed, fabricated organic LSCs at different sizes and characterized their optical and electrical properties. The output efficiency enhancement methods for LSCs photovoltaics (PVs) are explored

Hirst, Linda

389

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

390

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

391

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

392

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

393

Method of making quasi-grain boundary-free polycrystalline solar cell structure and solar cell structure obtained thereby  

DOE Patents [OSTI]

A new solar cell structure is provided which will increase the efficiency of polycrystalline solar cells by suppressing or completely eliminating the recombination losses due to the presence of grain boundaries. This is achieved by avoiding the formation of the p-n junction (or other types of junctions) in the grain boundaries and by eliminating the grain boundaries from the active area of the cell. This basic concept can be applied to any polycrystalline material; however, it will be most beneficial for cost-effective materials having small grains, including thin film materials.

Gonzalez, Franklin N. (Gainesville, FL); Neugroschel, Arnost (Gainesville, FL)

1984-02-14T23:59:59.000Z

394

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

395

A model to determine financial indicators for organic solar cells  

SciTech Connect (OSTI)

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

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

2009-11-15T23:59:59.000Z

396

Method of making a back contacted solar cell  

DOE Patents [OSTI]

A back-contacted solar cell is described having laser-drilled vias connecting the front-surface carrier-collector junction to an electrode grid on the back surface. The structure may also include a rear surface carrier-collector junction connected to the same grid. The substrate is connected to a second grid which is interdigitated with the first. Both grids are configured for easy series connection with neighboring cells. Several processes are disclosed to produce the cell. 2 figs.

Gee, J.M.

1995-11-21T23:59:59.000Z

397

Method of making a back contacted solar cell  

DOE Patents [OSTI]

A back-contacted solar cell having laser-drilled vias connecting the front-surface carrier-collector junction to an electrode grid on the back surface. The structure may also include a rear surface carrier-collector junction connected to the same grid. The substrate is connected to a second grid which is interdigitated with the first. Both grids are configured for easy series connection with neighboring cells. Several processes are disclosed to produce the cell.

Gee, James M. (Albuquerque, NM)

1995-01-01T23:59:59.000Z

398

Optimized scalable stack of fluorescent solar concentrator systems with bifacial silicon solar cells  

SciTech Connect (OSTI)

In this paper, we present a concentrator system based on a stack of fluorescent concentrators (FCs) and a bifacial solar cell. Coupling bifacial solar cells to a stack of FCs increases the performance of the system and preserves its efficiency when scaled. We used an approach to optimize a fluorescent solar concentrator system design based on a stack of multiple fluorescent concentrators (FC). Seven individual fluorescent collectors (20?mm??20?mm??2?mm) were realized by in-situ polymerization and optically characterized in regard to their ability to guide light to the edges. Then, an optimization procedure based on the experimental data of the individual FCs was carried out to determine the stack configuration that maximizes the total number of photons leaving edges. Finally, two fluorescent concentrator systems were realized by attaching bifacial silicon solar cells to the optimized FC stacks: a conventional system, where FC were attached to one side of the solar cell as a reference, and the proposed bifacial configuration. It was found that for the same overall FC area, the bifacial configuration increases the short-circuit current by a factor of 2.2, which is also in agreement with theoretical considerations.

Martnez Dez, Ana Luisa, E-mail: a.martinez@itma.es [Fundacin ITMA, Parque Empresarial Principado de Asturias, C/Calafates, Parcela L-3.4, 33417 Avils (Spain); Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg (Germany); Gutmann, Johannes; Posdziech, Janina; Rist, Tim; Goldschmidt, Jan Christoph [Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg (Germany); Plaza, David Gmez [Fundacin ITMA, Parque Empresarial Principado de Asturias, C/Calafates, Parcela L-3.4, 33417 Avils (Spain)

2014-10-21T23:59:59.000Z

399

Structured SWNTs and Graphene for Solar Cells Kehang Cui, Takaaki Chiba, Xiao Chen, Shohei Chiashi and Shigeo Maruyama*  

E-Print Network [OSTI]

of heterojunction solar cells and dye-sensitized solar cells (DSSCs). The structure of SWNTs was controlled nanotubes, Micro-honeycomb, SWNT-Si solar cell, Dye-sensitized solar cell, Graphene 1. Introduction Single and structural simplicity. Dye-sensitized solar cells (DSSCs)6 have the advantages of relatively high PCE values

Maruyama, Shigeo

400

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

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

Improvements to solar thermoelectric generators through device design  

E-Print Network [OSTI]

A solar thermoelectric generator (STEG) is a device which converts sunlight into electricity through the thermoelectric effect. A STEG is nominally formed when a thermoelectric generator (TEG), a type of solid state heat ...

Weinstein, Lee A. (Lee Adragon)

2013-01-01T23:59:59.000Z

402

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

Open Energy Info (EERE)

development of high-quality and attractive-looking model designs for integrating solar water heaters (SWH) into buildings in China. Coordinates: 39.90601, 116.387909 Show...

403

Light-trapping in dye-sensitized solar cells Stephen Foster* and Sajeev John  

E-Print Network [OSTI]

Light-trapping in dye-sensitized solar cells Stephen Foster* and Sajeev John We demonstrate numerically that photonic crystal dye-sensitized solar cells (DSSCs) can provide at least a factor of one researched is the dye-sensitized solar cell (DSSC). These cells are inexpensive to make and boast power

John, Sajeev

404

N-PERT BACK JUNCTION SOLAR CELLS: AN OPTION FOR THE NEXT INDUSTRIAL TECHNOLOGY GENERATION?  

E-Print Network [OSTI]

are introducing a new solar cell design: the Passivated Emitter and Rear Cell (PERC), which features a full-PERT (Passivated Emitter, Rear Totally Diffused) solar cells with a processing sequence based on an industrialN-PERT BACK JUNCTION SOLAR CELLS: AN OPTION FOR THE NEXT INDUSTRIAL TECHNOLOGY GENERATION? Bianca

405

Preprint 24th EU PVSEC, 2009, Hamburg FITTING OF LATERAL RESISTANCES IN SILICON SOLAR CELLS  

E-Print Network [OSTI]

Preprint 24th EU PVSEC, 2009, Hamburg FITTING OF LATERAL RESISTANCES IN SILICON SOLAR CELLS cell from electroluminescence (EL) is introduced. A two-dimensional model of the solar cell screen printed monocrystalline silicon solar cell are shown and the influence of lateral diffusion

Junk, Michael

406

Nanodome Solar Cells with Efficient Light Management and Self-Cleaning  

E-Print Network [OSTI]

Nanodome Solar Cells with Efficient Light Management and Self-Cleaning Jia Zhu, Ching-Mei Hsu Nanocone, nanodome, solar cell, light trapping, photovoltaics S olar cells of nanostructures 94305 ABSTRACT Here for the first time, we demonstrate novel nanodome solar cells, which have periodic

Cui, Yi

407

Solar Cell Light Trapping beyond the Ray Optic Limit Dennis M. Callahan,* Jeremy N. Munday,  

E-Print Network [OSTI]

Solar Cell Light Trapping beyond the Ray Optic Limit Dennis M. Callahan,* Jeremy N. Munday: Photovoltaic cell, solar cell, local density of optical states (LDOS), light trapping, plasmonic, nanophotonic light trapping, as the solar cell absorber layer thickness is reduced, absorption is also reduced

Atwater, Harry

408

Solar-Hydrogen Fuel-Cell Vehicles  

E-Print Network [OSTI]

is ter for PEM fuel cells: thinner membranes cost less andPEM fuel cells, the extra yearly mineproduc- ciency, environmental impacts and Iife-cycle costcost air-separation or COz- removal methods are found, alkaline fuel cells could prove to be superior to PEM

DeLuchi, Mark A.; Ogden, Joan M.

1993-01-01T23:59:59.000Z

409

Fabrication of solar cells with counter doping prevention  

DOE Patents [OSTI]

A solar cell fabrication process includes printing of dopant sources over a polysilicon layer over backside of a solar cell substrate. The dopant sources are cured to diffuse dopants from the dopant sources into the polysilicon layer to form diffusion regions, and to crosslink the dopant sources to make them resistant to a subsequently performed texturing process. To prevent counter doping, dopants from one of the dopant sources are prevented from outgassing and diffusing into the other dopant source. For example, phosphorus from an N-type dopant source is prevented from diffusing to a P-type dopant source comprising boron.

Dennis, Timothy D; Li, Bo; Cousins, Peter John

2013-02-19T23:59:59.000Z

410

Thin film solar cell including a spatially modulated intrinsic layer  

DOE Patents [OSTI]

One or more thin film solar cells in which the intrinsic layer of substantially amorphous semiconductor alloy material thereof includes at least a first band gap portion and a narrower band gap portion. The band gap of the intrinsic layer is spatially graded through a portion of the bulk thickness, said graded portion including a region removed from the intrinsic layer-dopant layer interfaces. The band gap of the intrinsic layer is always less than the band gap of the doped layers. The gradation of the intrinsic layer is effected such that the open circuit voltage and/or the fill factor of the one or plural solar cell structure is enhanced.

Guha, Subhendu (Troy, MI); Yang, Chi-Chung (Troy, MI); Ovshinsky, Stanford R. (Bloomfield Hills, MI)

1989-03-28T23:59:59.000Z

411

Process Development for High Voc CdTe Solar Cells  

SciTech Connect (OSTI)

This is a cumulative and final report for Phases I, II and III of this NREL funded project (subcontract # XXL-5-44205-10). The main research activities of this project focused on the open-circuit voltage of the CdTe thin film solar cells. Although, thin film CdTe continues to be one of the leading materials for large-scale cost-effective production of photovoltaics, the efficiency of the CdTe solar cells have been stagnant for the last few years. This report describes and summarizes the results for this 3-year research project.

Ferekides, C. S.; Morel, D. L.

2011-05-01T23:59:59.000Z

412

Design of Semiconductor-Based Back Reflectors for High Voc Monolithic Multijunction Solar Cells: Preprint  

SciTech Connect (OSTI)

State-of-the-art multijunction cell designs have the potential for significant improvement before going to higher number of junctions. For example, the Voc can be substantially increased if the photon recycling taking place in the junctions is enhanced. This has already been demonstrated (by Alta Devices) for a GaAs single-junction cell. For this, the loss of re-emitted photons by absorption in the underlying layers or substrate must be minimized. Selective back surface reflectors are needed for this purpose. In this work, different architectures of semiconductor distributed Bragg reflectors (DBR) are assessed as the appropriate choice for application in monolithic multijunction solar cells. Since the photon re-emission in the photon recycling process is spatially isotropic, the effect of the incident angle on the reflectance spectrum is of central importance. In addition, the DBR structure must be designed taking into account its integration into the monolithic multijunction solar cells, concerning series resistance, growth economics, and other issues. We analyze the tradeoffs in DBR design complexity with all these requirements to determine if such a reflector is suitable to improve multijunction solar cells.

Garcia, I.; Geisz, J.; Steiner, M.; Olson, J.; Friedman, D.; Kurtz, S.

2012-06-01T23:59:59.000Z

413

IMPROVING THE EFFICIENCY OF THERMOELECTRIC GENERATORS BY USING SOLAR HEAT CONCENTRATORS  

E-Print Network [OSTI]

IMPROVING THE EFFICIENCY OF THERMOELECTRIC GENERATORS BY USING SOLAR HEAT CONCENTRATORS M. T. de : Thermoelectric generator, Solar heat concentrator, Carnot efficiency I - Introduction The global energy crisis the junctions of two different materials. For a TEG to supply a significant amount of power, several thermo

414

An Improved MPPT Interleaved Boost Converter for Solar Electric Vehicle Application  

E-Print Network [OSTI]

during transient and instantaneous peak power demands of an electric vehicle (EV) and to recover energyAn Improved MPPT Interleaved Boost Converter for Solar Electric Vehicle Application F. Khoucha, A and lower device stress than conventional designs, for solar electric vehicle (SEV) applications

Boyer, Edmond

415

CAB-DWTM for 5 μm trace-width deposition of solar cell metallization top-contacts  

SciTech Connect (OSTI)

This paper reviews methods for creating solar cell grid contacts and explores how cell efficiency can be increased using CAB-DW{trademark}. Specifically, the efficiency of p-i-n structure solar cells built in-house with 90 {micro}m sputtered lines and 5 {micro}m CAB-DW lines were compared. Preliminary results of the comparison show a marked improvement in solar cell efficiency using CAB-DW. In addition to this, a theoretical and experimental analysis of the dynamics of particle impaction on a substrate (i.e. whether particle stick or bounce) will be discussed including how this analysis may lead to further improvement of CAB-DW.

Justin Hoey; Drew Thompson; Matt Robinson; Zakaria Mahmud; Orven F. Swenson; Iskander S. Akhatov; Douglas L. Schulz

2009-06-08T23:59:59.000Z

416

Substrate for thin silicon solar cells  

DOE Patents [OSTI]

A photovoltaic device for converting solar energy into electrical signals comprises a substrate, a layer of photoconductive semiconductor material grown on said substrate, wherein the substrate comprises an alloy of boron and silicon, the boron being present in a range of from 0.1 to 1.3 atomic percent, the alloy having a lattice constant substantially matched to that of the photoconductive semiconductor material and a resistivity of less than 1{times}10{sup {minus}3} ohm-cm. 4 figures.

Ciszek, T.F.

1995-03-28T23:59:59.000Z

417

Substrate for thin silicon solar cells  

DOE Patents [OSTI]

A photovoltaic device for converting solar energy into electrical signals comprises a substrate, a layer of photoconductive semiconductor material grown on said substrate, wherein the substrate comprises an alloy of boron and silicon, the boron being present in a range of from 0.1 to 1.3 atomic percent, the alloy having a lattice constant substantially matched to that of the photoconductive semiconductor material and a resistivity of less than 1.times.10.sup.-3 ohm-cm.

Ciszek, Theodore F. (Evergreen, CO)

1995-01-01T23:59:59.000Z

418

Solar Cell Simulation | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage » SearchEnergyDepartmentScoping Study |4 Solar Background Document 4

419

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

E-Print Network [OSTI]

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

Kassegne, Samuel Kinde

420

Study of molybdenum oxide as a back contact buffer for thin film n-CdS/p-CdTe solar cells.  

E-Print Network [OSTI]

??Back contact improvement is one of the most crucial issues for the realization of highly efficient n-CdS/p-CdTe solar cells. Conventional methods for making a sufficiently (more)

Lin, Hao

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.


421

Angular constraint on light-trapping absorption enhancement in solar cells  

E-Print Network [OSTI]

Light trapping for solar cells can reduce production cost and improve energy conversion efficiency. Understanding some of the basic theoretical constraints on light trapping is therefore of fundamental importance. Here, we develop a general angular constraint on the absorption enhancement in light trapping. We show that there is an upper limit for the angular integration of absorption enhancement factors. This limit is determined by the number of accessible resonances supported by an absorber.

Yu, Zongfu

2010-01-01T23:59:59.000Z

422

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

E-Print Network [OSTI]

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

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

2013-01-01T23:59:59.000Z

423

Lithography-free sub-100nm nanocone array antireflection layer for low-cost silicon solar cell  

E-Print Network [OSTI]

High density and uniformity sub-100nm surface oxidized silicon nanocone forest structure is created and integrated onto the existing texturization microstructures on photovoltaic device surface by a one-step high throughput plasma enhanced texturization method. We suppressed the broadband optical reflection on chemically textured grade-B silicon solar cells for up to 70.25% through this nanomanufacturing method. The performance of the solar cell is improved with the short circuit current increased by 7.1%, fill factor increased by 7.0%, conversion efficiency increased by 14.66%. Our method demonstrates the potential to improve the photovoltaic device performance with low cost high and throughput nanomanufacturing technology.

Xu, Zhida

2014-01-01T23:59:59.000Z

424

Improved Modeling Tools Development for High Penetration Solar  

SciTech Connect (OSTI)

One of the significant objectives of the High Penetration solar research is to help the DOE understand, anticipate, and minimize grid operation impacts as more solar resources are added to the electric power system. For Task 2.2, an effective, reliable approach to predicting solar energy availability for energy generation forecasts using the University of California, San Diego (UCSD) Sky Imager technology has been demonstrated. Granular cloud and ramp forecasts for the next 5 to 20 minutes over an area of 10 square miles were developed. Sky images taken every 30 seconds are processed to determine cloud locations and cloud motion vectors yielding future cloud shadow locations respective to distributed generation or utility solar power plants in the area. The performance of the method depends on cloud characteristics. On days with more advective cloud conditions, the developed method outperforms persistence forecasts by up to 30% (based on mean absolute error). On days with dynamic conditions, the method performs worse than persistence. Sky Imagers hold promise for ramp forecasting and ramp mitigation in conjunction with inverter controls and energy storage. The pre-commercial Sky Imager solar forecasting algorithm was documented with licensing information and was a Sunshot website highlight

Washom, Byron

2014-12-11T23:59:59.000Z

425

Enabling Thin Silicon Solar Cell Technology  

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

cracking problem in silicon cell technology," says Budiman. "The ALS provides us with a light that allows us to measure and characterize molecular stress in a very quantitative...

426

Eighth Workshop on Crystalline Silicon Solar Cell Materials and Processes; Summary Discussion Sessions  

SciTech Connect (OSTI)

This report is a summary of the panel discussions included with the Eighth Workshop on Crystalline Silicon Solar Cell Materials and Processes. The theme of the workshop was ''Supporting the Transition to World Class Manufacturing.'' This workshop provided a forum for an informal exchange of information between researchers in the photovoltaic and nonphotovoltaic fields on various aspects of impurities and defects in silicon, their dynamics during device processing, and their application in defect engineering. This interaction helped establish a knowledge base that can be used for improving device-fabrication processes to enhance solar-cell performance and reduce cell costs. It also provided an excellent opportunity for researchers from industry and universities to recognize mutual needs for future joint research.

Sopori, B.; Swanson, D.; Sinton, R.; Stavola, M.; Tan, T.

1998-12-08T23:59:59.000Z

427

Development of low-temperature solution-processed colloidal quantum dot-based solar cells  

E-Print Network [OSTI]

Solution-processed solar cells incorporating organic semiconductors and inorganic colloidal quantum dots (QDs) are potential alternatives to conventional solar cells fabricated via vacuum or high-temperature sintering ...

Chang, Liang-Yi, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

428

a-si solar cells: Topics by E-print Network  

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

for the development of amorphous Si solar cells Seung May 2010 Keywords: a-Si:H Thin film Si solar cell Spectroscopic ellipsometry (SE) a b s t r a c t We Park, Byungwoo...

429

a-si solar cell: Topics by E-print Network  

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

for the development of amorphous Si solar cells Seung May 2010 Keywords: a-Si:H Thin film Si solar cell Spectroscopic ellipsometry (SE) a b s t r a c t We Park, Byungwoo...

430

NREL Success Stories - Quest for Inexpensive Silicon Solar Cells  

ScienceCinema (OSTI)

Scientists at the National Renewable Energy Laboratory (NREL) share their story about a successful partnership with Oak Ridge National Laboratory and the Ampulse Corporation and how support from the US Department of Energy's Technology Commercialization & Deployment Fund has helped it and their silicon solar cell research thrive.

Branz, Howard

2013-05-29T23:59:59.000Z

431

Polyaniline on crystalline silicon heterojunction solar cells Weining Wanga  

E-Print Network [OSTI]

-Si have long been of fundamental interest, and amorphous silicon a-Si:H /c-Si heterojunctions are now is about the current limit achieved with a-Si:H/c-Si heterojunctions. The largest VOC we ob- tained was 0Polyaniline on crystalline silicon heterojunction solar cells Weining Wanga and E. A. Schiff

Schiff, Eric A.

432

MORPHOLOGY DEPENDENT SHORT CIRCUIT CURRENT IN BULK HETEROJUNCTION SOLAR CELL  

E-Print Network [OSTI]

of the coupled exciton/electron/hole flow in the disordered polymer network, but also guarantees to connect kinetics appears complex and final structure is randomly interpenetrating clusters of polymer and fullerene, West Lafayette, Indiana, USA ABSTRACT Polymer based bulk heterostructure (BH) solar cell offers

Alam, Muhammad A.

433

Enhanced regeneration of degraded polymer solar cells by thermal annealing  

SciTech Connect (OSTI)

The degradation and thermal regeneration of poly(3-hexylethiophene) (P3HT):[6,6]-phenyl-C{sub 61}-butyric acid methyl ester (PCBM) and P3HT:indene-C{sub 60} bisadduct (ICBA) polymer solar cells, with Ca/Al and Ca/Ag cathodes and indium tin oxide/poly(ethylene-dioxythiophene):polystyrene sulfonate anode have been investigated. Degradation occurs via a combination of three primary pathways: (1) cathodic oxidation, (2) active layer phase segregation, and (3) anodic diffusion. Fully degraded devices were subjected to thermal annealing under inert atmosphere. Degraded solar cells possessing Ca/Ag electrodes were observed to regenerate their performance, whereas solar cells having Ca/Al electrodes exhibited no significant regeneration of device characteristics after thermal annealing. Moreover, the solar cells with a P3HT:ICBA active layer exhibited enhanced regeneration compared to P3HT:PCBM active layer devices as a result of reduced changes to the active layer morphology. Devices combining a Ca/Ag cathode and P3HT:ICBA active layer demonstrated ?50% performance restoration over several degradation/regeneration cycles.

Kumar, Pankaj, E-mail: pankaj@mail.nplindia.ernet.in [CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012 (India); Centre for Organic Electronics, Physics, University of Newcastle, Callaghan NSW-2308 (Australia); Bilen, Chhinder; Zhou, Xiaojing; Belcher, Warwick J.; Dastoor, Paul C., E-mail: Paul.Dastoor@newcastle.edu.au [Centre for Organic Electronics, Physics, University of Newcastle, Callaghan NSW-2308 (Australia); Feron, Krishna [Centre for Organic Electronics, Physics, University of Newcastle, Callaghan NSW-2308 (Australia); CSIRO Energy Technology, P. O. Box 330, Newcastle NSW 2300 (Australia)

2014-05-12T23:59:59.000Z

434

Photovoltaic Measurements in Single-Nanowire Silicon Solar Cells  

E-Print Network [OSTI]

Photovoltaic Measurements in Single-Nanowire Silicon Solar Cells Michael D. Kelzenberg, Daniel B-voltage measurements were made under simulated Air Mass 1.5 global illumination. Photovoltaic spectral response work by our group has shown that macroscopic Si wire arrays (>1 cm2 in area) suitable for photovoltaic

Atwater, Harry

435

EELE408 Photovoltaics Lecture 11: Solar Cell Parameters  

E-Print Network [OSTI]

mV Commercial silicon solar cells 500-600 mV 11 Power & IV Curve Power (Watts) is the rate The power output by a source is the product of the current supplied and the voltage at which the current was supplied 12 Power output = Source voltage x Source current P=V x I (Watts = Joules/second) = (Volts

Kaiser, Todd J.

436

Aerogel tempelated ZnO dye-sensitized solar cells.  

SciTech Connect (OSTI)

Atomic layer deposition is employed to conformally coat low density, high surface area aerogel films with ZnO. The ZnO/aerogel membranes are incorporated as photoanodes in dye-sensitized solar cells, which exhibit excellent power efficiencies of up to 2.4% under 100 mW cm{sup -2} light intensity.

Hamann, T. W.; Martinson , A. B. E.; Elam, J. W.; Pellin, M. J.; Hupp, J. T.; Materials Science Division; Northwestern Univ.

2008-01-01T23:59:59.000Z

437

In-Line Crack and Stress Detection in Silicon Solar Cells Using Resonance Ultrasonic Vibrations  

SciTech Connect (OSTI)

Statement of Problem and Objectives. Wafer breakage in automated solar cell production lines is identified as a major technical problem and a barrier for further cost reduction of silicon solar module manufacturing. To the best of our knowledge, there are no commercial systems addressing critical needs for in-line inspection of the mechanical quality of solar wafers and cells. The principal objective of the SBIR program is to validate through experiments and computer modeling the applicability of the Resonance Ultrasonic Vibrations system, which ultimately can be used as a real-time in-line manufacturing quality control tool for fast detection of mechanically unstable silicon solar cells caused by cracks. The specific objective of Phase II is to move the technology of in-line crack detection from the laboratory level to commercial demonstration through development of a system prototype. The fragility of silicon wafers possessing low mechanical strength is attributed to peripheral and bulk millimeter-length cracks. The research program is based on feasibility results obtained during Phase I, which established that: (i) the Resonance Ultrasonic Vibrations method is applicable to as-cut, processed wafers and finished cells; (ii) the method sensitivity depends on the specific processing step; it is highest in as-cut wafers and lowest in wafers with metallization pattern and grid contacts; (iii) the system is capable of matching the 2.0 seconds per wafer throughput rate of state-of-art solar cell production lines; (iv) finite element modeling provides vibration mode analysis along with peak shift versus crack length and crack location dependence; (v) a high 91% crack rejection rate was confirmed through experimentation and statistical analysis. The Phase II project has the following specific tasks: (i) specify optimal configurations of the in-line system?¢????s component hardware and software; (ii) develop and justify a system prototype that meets major specifications for an in-line crack detection unit, such as high throughput rate, high level of stability, reproducibility of data acquisition and analysis, and high sensitivity with respect to crack length and crack location; (iii) design a system platform that allows easy integration within and adaptation to various solar cell belt-type production lines; (iv) develop a testing protocol providing quality certification of the production-grade system. Commercial Application of the proposed activity consists of bringing to the solar market a new high-tech product based on an innovative solution and patented methodology to contribute to cost reduction of silicon solar module production. The solar industry, with crystalline silicon as a dominant segment, shows outstanding performance, with approximately 25% yearly growth during the last years. Despite a slowdown with only 5.6 GW installations in 2009, solar module production for the 2010 and 2011 years was recovered. According to European Photonics Industry Consortium new solar PV installations grow by 56% compared to 2010 reached 64.7 GW in 2011. Revenues in the PV industry reached a record high of $93 billion in 2011, a 13.4 percent gain over 2010 â?? and 150 percent over 2009. This growth was forecasted to continue in 2013 with double digits growth. The solar industry is economically driven to make solar panels of the highest conversion efficiency and reliability at the lowest production cost. The Resonance Ultrasonic Vibration system addresses critical needs of the silicon-based solar industry by providing a quality control method and tool, which will improve productivity, increase reliability of products and reduce manufacturing cost of solar panels.

Ostapenko, Sergei

2013-04-03T23:59:59.000Z

438

1. INTRODUCTION CdTe/CdS solar cells are among the most promising  

E-Print Network [OSTI]

Te/CdS SOLAR CELLS A.Romeo, A.N. Tiwari, and H. Zogg Thin Films Physics Group, Institute of Quantum ElectronicsTe/CdS thin film solar cells. The merits of different TCOs and the properties of the CdTe/CdS solar cells1. INTRODUCTION CdTe/CdS solar cells are among the most promising devices for low cost and high

Romeo, Alessandro

439

Panoramic view of electrochemical pseudocapacitor and organic solar cell research in molecularly engineered energy materials (MEEM)  

E-Print Network [OSTI]

Photodiodes from Interpenetrating Polymer Networks. NaturePolymer Solar Cells with Nanoscale Control of the Interpenetrating Network

2014-01-01T23:59:59.000Z

440

High throughput parallel backside contacting and periodic texturing for high-efficiency solar cells  

SciTech Connect (OSTI)

Disclosed are configurations of long-range ordered features of solar cell materials, and methods for forming same. Some features include electrical access openings through a backing layer to a photovoltaic material in the solar cell. Some features include textured features disposed adjacent a surface of a solar cell material. Typically the long-range ordered features are formed by ablating the solar cell material with a laser interference pattern from at least two laser beams.

Daniel, Claus; Blue, Craig A.; Ott, Ronald D.

2014-08-19T23:59:59.000Z

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.


441

Manufacturing-Friendly Advance Seen in CIGS Solar Cell Processing (Fact Sheet)  

SciTech Connect (OSTI)

Scientists developed a robust, high-performance amorphous InZnO transparent contact for CIGS solar cells.

Not Available

2011-05-01T23:59:59.000Z

442

21.9% efficient silicon bifacial solar cells  

SciTech Connect (OSTI)

This paper reports the efficiency of bifacial silicon solar cells and mini-modules fabricated at SunPower Corp. The best cell has AM1.5G front efficiency of 21.9% and rear efficiency of 13.9%. The mini-modules, each containing 20 bifacial cells, attain efficiency as high as the average efficiency of their individual cells. The best module has AM1.5G front efficiency of 20.66% and rear efficiency of 10.54%. Optical properties of the bifacial cells have also been measured and analyzed. The results show that bifacial cells, compared to monofacial cells, absorb less infrared light and thus they can operate at lower temperature in space.

Zhou, C.Z.; Verlinden, P.J.; Crane, R.A.; Swanson, R.M. [SunPower Corp., Sunnyvale, CA (United States); Sinton, R.A. [Sinton Consulting, San Jose, CA (United States)

1997-12-31T23:59:59.000Z

443

SOLAR CELL BASED PYRANOMETERS: EVALUATION OF THE DIFFUSE RESPONSE Frank Vignola  

E-Print Network [OSTI]

260 SOLAR CELL BASED PYRANOMETERS: EVALUATION OF THE DIFFUSE RESPONSE Frank Vignola Department The responsivity to diffuse radiation of a solar cell based pyranometer is studied. Diffuse measurements are made of the LiCor pyranometer is presented. Implication of the spectral dependence of the solar cell based

Oregon, University of

444

CVD growth control and solar cell application of single-walled carbon nanotubes  

E-Print Network [OSTI]

demonstrated the air-stable SWNT/Si solar cells with power conversion efficiency (PCE) approaching 11% for the first time. The PCE of the solar cell slightly increases after 10-month ambient #12;ii exposure-HN to the SWNT-Si solar cell results in both high PCE and high fill factor. Note that the achieved PCE

Maruyama, Shigeo

445

Intermediate-band solar cells based on quantum dot supracrystals Q. Shao and A. A. Balandina  

E-Print Network [OSTI]

parameter in the photovoltaic PV solar cell technology. It is defined as = FFVocJsc Pin , 1 where FFIntermediate-band solar cells based on quantum dot supracrystals Q. Shao and A. A. Balandina Nano to implement the intermediate-band solar cell with the efficiency exceeding the Shockley-Queisser limit

446

Advancing beyond current generation dye-sensitized solar cells Thomas W. Hamann,ab  

E-Print Network [OSTI]

Advancing beyond current generation dye-sensitized solar cells Thomas W. Hamann,ab Rebecca A The most efficient dye-sensitized solar cells (DSSCs) have had essentially the same configuration on the fabrication and character- ization of new architectures for dye-sensitized solar cells. He now holds

447

Nanomaterials-Enabled Dye-Sensitized Solar Cells and Jun Lou1  

E-Print Network [OSTI]

O-7 Nanomaterials-Enabled Dye-Sensitized Solar Cells Pei Dong1 and Jun Lou1 1 sensitized solar cells (DSCs), the third generation of solar cells, have attracted more and more attention Department of Mechanical Engineering and Materials Science, Rice University, Houston, Texas, U.S.A. Dye

448

New Architectures for Dye-Sensitized Solar Cells Alex B. F. Martinson,[a, b  

E-Print Network [OSTI]

New Architectures for Dye-Sensitized Solar Cells Alex B. F. Martinson,[a, b] Thomas W. Hamann of magnitude such as depicted in Figure 1. Abstract: Modern dye-sensitized solar cell (DSSC) tech- nology steadily climbing, one class--dye-sensi- tized solar cells (DSSCs)--has notably plateaued. After

449

Dye-Sensitized Solar Cells DOI: 10.1002/anie.201104786  

E-Print Network [OSTI]

Dye-Sensitized Solar Cells DOI: 10.1002/anie.201104786 Low-Cost Copper Zinc Tin Sulfide Counter Electrodes for High- Efficiency Dye-Sensitized Solar Cells** Xukai Xin, Ming He, Wei Han, Jaehan Jung, and Zhiqun Lin* Dye-sensitized solar cells (DSSCs) are among the most promising photovoltaic devices for low

Lin, Zhiqun

450

Dye-Sensitized Solar Cells DOI: 10.1002/anie.200704919  

E-Print Network [OSTI]

Dye-Sensitized Solar Cells DOI: 10.1002/anie.200704919 Aggregation of ZnO Nanocrystallites for High Conversion Efficiency in Dye-Sensitized Solar Cells** Qifeng Zhang, Tammy P. Chou, Bryan Russo, Samson A system consisting of a dye-sensitized semiconductor film and an electrolyte, dye-sensitized solar cells

Cao, Guozhong

451

Determining the locus for photocarrier recombination in dye-sensitized solar cells  

E-Print Network [OSTI]

Determining the locus for photocarrier recombination in dye-sensitized solar cells Kai Zhua) and E and infrared transmittance measurements on dye-sensitized solar cells based on a mesoporous titania (TiO2. © 2002 American Institute of Physics. DOI: 10.1063/1.1436533 Dye-sensitized solar cells based

Schiff, Eric A.

452

Graphene Materials and Their Use in Dye-Sensitized Solar Cells Joseph D. Roy-Mayhew,  

E-Print Network [OSTI]

Graphene Materials and Their Use in Dye-Sensitized Solar Cells Joseph D. Roy-Mayhew, and Ilhan A References 6345 1. INTRODUCTION Dye-sensitized solar cells (DSSCs) have taken up broad interest. Graphene Applications in Other Types of Solar Cells 6343 7. Conclusions and Outlook 6343 Author Information

Aksay, Ilhan A.

453

Dye-sensitized solar cells using laser processing techniques A. Piqu, a  

E-Print Network [OSTI]

Dye-sensitized solar cells using laser processing techniques H. Kim,a A. Piqué, a G. P. Kushto,a R in dye-sensitized solar cells. LDW enables the fabrication of conformal structures containing metals that is ideally suited for dye-sensitized solar cells. In this experiment, a pulsed UV laser (355nm) is used

Arnold, Craig B.

454

Functionalized Graphene Sheets as a Versatile Replacement for Platinum in Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

) electrodes were tested for catalytic performance in dye-sensitized solar cells (DSSCs). By using ethyl) this residue must not disperse in the electrolyte. KEYWORDS: graphene, dye-sensitized solar cell, cobalt redox mediator, triiodide, sacrificial binder 1. INTRODUCTION Dye-sensitized solar cells (DSSCs

Aksay, Ilhan A.

455

ZnO nanoparticles and nanowire array hybrid photoanodes for dye-sensitized solar cells  

E-Print Network [OSTI]

ZnO nanoparticles and nanowire array hybrid photoanodes for dye-sensitized solar cells Supan for dye-sensitized solar cell DSC with NW arrays to serve as a direct pathway for fast electron transport Institute of Physics. doi:10.1063/1.3327339 Dye-sensitized solar cells DSCs have attracted a lot

Cao, Guozhong

456

Dye Sensitized Solar Cells Efforts at Ris National Laboratory Matteo Biancardo, Keld West, Frederik C. Krebs  

E-Print Network [OSTI]

Dye Sensitized Solar Cells Efforts at Risø National Laboratory Matteo Biancardo, Keld West solar cells (http://www.risoe.dk/solarcells/). In this contribution we address optimizations of Dye Sensitized Solar Cells (DSSCs) through the combination of important issues like semitransparency, quasi

457

High Excitation Transfer Efficiency from Energy Relay Dyes in Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

High Excitation Transfer Efficiency from Energy Relay Dyes in Dye-Sensitized Solar Cells Brian E, TT1, to increase the overall power conversion efficiency of a dye-sensitized solar cell (DSC) from 3 be efficiently implemented in optimized dye-sensitized solar cells, but also highlights the need to design highly

McGehee, Michael

458

Bulk Heterojunction Organic Solar Cells utilizing a Benzothiadiazole-based Oligomer  

E-Print Network [OSTI]

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

Collins, Gary S.

459

Nanowire Solar Cells Erik C. Garnett, Mark L. Brongersma, Yi Cui,  

E-Print Network [OSTI]

, nanoscience, light trapping, energy, solar cells Abstract The nanowire geometry provides potential advantages of vertical nanowires with radial junctions take advantage of all these effects, although solar cells madeNanowire Solar Cells Erik C. Garnett, Mark L. Brongersma, Yi Cui, and Michael D. McGehee Department

Cui, Yi

460

Hybrid solar cells based on porous Si and copper phthalocyanine derivatives  

E-Print Network [OSTI]

Hybrid solar cells based on porous Si and copper phthalocyanine derivatives I. A. Levitskya 25 October 2004) We demonstrate a solar cell based on n-type nanoporous Si (PSi) filled with copper of the PSi structure and pore filling on the solar cell performance is discussed. 2004 American Institute

Euler, William B.

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

Thin crystalline silicon solar cells based on epitaxial films grown at 165C by RF PECVD  

E-Print Network [OSTI]

1 Thin crystalline silicon solar cells based on epitaxial films grown at 165°C by RF PECVD Romain temperatures. Keywords : Low temperature, epitaxy, PECVD, Si thin film, Solar cell hal-00749873,version1-25Nov shortage until 2010. Research on epitaxial growth for thin film crystalline silicon solar cells has gained

462

Mechanics of thin-film transistors and solar cells on flexible substrates Helena Gleskova*  

E-Print Network [OSTI]

1 Mechanics of thin-film transistors and solar cells on flexible substrates Helena Gleskova* , I be minimized throughout the fabrication process. Amorphous silicon thin-film transistors and solar cells, thin-film transistor, solar cell, flexible electronics Phone: (609) 258-4626, Fax: (609) 258-3585, E

463

CNT-SI HETEROJUNCTION SOLAR CELLS WITH STRUCTURE-CONTROLLED SINGLE-WALL CARBON NANOTUBE FILMS  

E-Print Network [OSTI]

CNT-SI HETEROJUNCTION SOLAR CELLS WITH STRUCTURE- CONTROLLED SINGLE-WALL CARBON NANOTUBE FILMS. The heterojunction solar cell was fabricated by dry depositing the SWNT film to the 3 mm by 3 mm n-type silicon solar cells. We proposed a water-vapor treatment to build up SWNTs to a self-assembled micro- honeycomb

Maruyama, Shigeo

464

Performance predictions for monolithic, thin-film CdTe/Ge tandem solar cells  

E-Print Network [OSTI]

Performance predictions for monolithic, thin-film CdTe/Ge tandem solar cells D.L. Pulfrey*, J. Dell): pulfrey@ece.ubc.ca ABSTRACT Cadmium telluride thin-film solar cells are now commercially available be attainable. 1. INTRODUCTION Thin film solar cells based on polycrystalline CdTe have been investigated

Pulfrey, David L.

465

The novel usage of spectroscopic ellipsometry for the development of amorphous Si solar cells  

E-Print Network [OSTI]

May 2010 Keywords: a-Si:H Thin film Si solar cell Spectroscopic ellipsometry (SE) a b s t r a c t We analyzed with relation to structural and electrical properties of a-Si:H thin film for solar cell and faster methodology to develop a-Si:H thin film for thin film Si solar cells using SE measurements

Park, Byungwoo

466

Femtosecond laser ablation of indium tin-oxide narrow grooves for thin film solar cells  

E-Print Network [OSTI]

Femtosecond laser ablation of indium tin-oxide narrow grooves for thin film solar cells Qiumei Bian in the fabrication and assembly of thin film solar cells. Using a femtosecond (fs) laser, we selectively removed a unique scheme to ablate the indium tin-oxide layer for the fabrication of thin film solar cells

Van Stryland, Eric

467

Plasmonic enhancement of thin-film solar cells using gold-black C.J. Fredricksena  

E-Print Network [OSTI]

Plasmonic enhancement of thin-film solar cells using gold-black coatings C.J. Fredricksena , D. R thin-film amorphous-silicon solar cells enhance the short-circuit current by 20% over a broad spectrum and locally enhance the field strength. Keywords: plasmonics, thin-film, solar cell, metallic nanoparticles

Peale, Robert E.

468

Thin crystalline silicon solar cells based on epitaxial films grown at 165C by RF PECVD  

E-Print Network [OSTI]

1 Thin crystalline silicon solar cells based on epitaxial films grown at 165°C by RF PECVD Romain temperatures. Keywords : Low temperature, epitaxy, PECVD, Si thin film, Solar cell #12;2 1. Introduction: martin.labrune@polytechnique.edu ABSTRACT We report on heterojunction solar cells whose thin intrinsic

469

Optimization of the absorption efficiency of an amorphous-silicon thin-film tandem solar cell  

E-Print Network [OSTI]

Optimization of the absorption efficiency of an amorphous-silicon thin-film tandem solar cell-wave approach was used to compute the plane-wave absorptance of a thin-film tandem solar cell with a metallic­4]. In this context, a basic idea is to periodically texture the metallic back reflector of a thin-film solar cell

470

Semiconductor heterostructures and optimization of light-trapping structures for efficient thin-film solar cells  

E-Print Network [OSTI]

applications. However, one of the most persistent issues in solar cell design continues to be how to most and integration of active and passive media in solar cells. Myriad photonic structures containing sub of semiconductor nanostructures have inspired a host of new solar cell structures, including designs based

Yu, Edward T.

471

GEOMETRIC CHARACTERIZATION AND OPTIMIZATION OF 3D ORGANIC FLEXIBLE SOLAR CELLS  

E-Print Network [OSTI]

GEOMETRIC CHARACTERIZATION AND OPTIMIZATION OF 3D ORGANIC FLEXIBLE SOLAR CELLS Characterization and Optimization of 3D Organic Flexible Solar Cells by Ashish K. Gaikwad Master of Science of flexible organic solar cells, micro-fabricated using novel microfabrication procedures. A fully functional

Kassegne, Samuel Kinde

472

Experimental demonstration of enhanced photon recycling in angle-restricted GaAs solar cells  

E-Print Network [OSTI]

Experimental demonstration of enhanced photon recycling in angle-restricted GaAs solar cells Emily, emphasizing the optical nature of the effect. 1 Introduction For ideal solar cells where all recombination. Despite this theoretical prediction, until recently even the highest efficiency solar cells were not close

Faraon, Andrei

473

Engineering metal-impurity nanodefects for low-cost solar cells  

E-Print Network [OSTI]

LETTERS Engineering metal-impurity nanodefects for low-cost solar cells TONIO BUONASSISI1 online: 14 August 2005; doi:10.1038/nmat1457 A s the demand for high-quality solar-cell feedstock exceeds in dramatic enhancements of performance even in heavily contaminated solar-cell material. Highly sensitive

474

How much can guided modes enhance absorption in thin solar cells?  

E-Print Network [OSTI]

How much can guided modes enhance absorption in thin solar cells? Peter N. Saeta,1,2 Vivian E-backed solar cells caused by dipole scatterers embedded in the absorbing layer is studied using a semi limit of efficiency of p-n junction solar cells," J. Appl. Phys. 32, 510519 (1961). 2. C. H. Henry

Atwater, Harry

475

Towards an understanding of light activation processes in titanium oxide based inverted organic solar cells  

E-Print Network [OSTI]

solar cells S. Chambon, E. Destouesse, B. Pavageau, L. Hirsch, and G. Wantz Citation: J. Appl. Phys. 112. Related Articles Power losses in bilayer inverted small molecule organic solar cells Appl. Phys. Lett. 101, 233903 (2012) Thin-film encapsulation of inverted indium-tin-oxide-free polymer solar cells by atomic

Paris-Sud XI, Université de

476

SCALING-UP OF NEW GENERATION OF 3D FLEXIBLE ORGANIC SOLAR CELLS  

E-Print Network [OSTI]

SCALING-UP OF NEW GENERATION OF 3D FLEXIBLE ORGANIC SOLAR CELLS _______________ A Thesis Presented Generation of 3D Flexible Organic Solar Cell _____________________________________________ Samuel Kinde Engineering San Diego State University, 2012 Scaling-up of New Generation of 3D Flexible Organic Solar Cells

Kassegne, Samuel Kinde

477

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

E-Print Network [OSTI]

solar cells Jong Bok Kim, Seokhoon Ahn, Seok Ju Kang, Colin Nuckolls, and Yueh-Lin Loo Citation: Appl Institute of Physics. Related Articles A ferroelectricsemiconductor-coupled solar cell with tunable electrodeposited Cu(In,Ga)Se2 solar cells: Application for non-destructive defect assessment Appl. Phys. Lett. 102

Hone, James

478

STUDY OF THE EFFECT OF ABSORBER ETCHING ON THE BACK CONTACT PERFORMANCE OF CDTE SOLAR CELLS  

E-Print Network [OSTI]

STUDY OF THE EFFECT OF ABSORBER ETCHING ON THE BACK CONTACT PERFORMANCE OF CDTE SOLAR CELLS Ivan that has shown a remarkable market success in thin film solar cells. It is well known that deposition and defects are addressed. 2 EXPERIMENTAL CdTe solar cells, in our laboratory, are usually prepared as follows

Romeo, Alessandro

479

Embedding metal electrodes in thick active layers for ITO-free plasmonic organic solar cells  

E-Print Network [OSTI]

Embedding metal electrodes in thick active layers for ITO-free plasmonic organic solar cells%) in optical absorption over both a conventional ITO organic solar cell and a conventional plasmonic organic solar cell with top-loaded metallic grating is predicted in the proposed structure. Optimal positioning

Park, Namkyoo

480

innovati nNREL Scientists Spurred the Success of Multijunction Solar Cells  

E-Print Network [OSTI]

innovati nNREL Scientists Spurred the Success of Multijunction Solar Cells Before 1984, many a solar cell can convert into electricity. Olson thought the focus should change to finding materials-winning gallium indium phosphide/gallium arsenide tandem solar cell, which had achieved record efficiencies, con

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481

The role of three-dimensional morphology on the efficiency of hybrid polymer solar cells  

E-Print Network [OSTI]

1 The role of three-dimensional morphology on the efficiency of hybrid polymer solar cells Stefan D.a.j.janssen@tue.nl #12;2 Abstract: The efficiency of polymer solar cells critically depends on the intimacy of mixing and quantitative correlation between solar cell performance, photophysical data and the three

Schmidt, Volker

482

On the modeling and simulation of reaction-transfer dynamics in semiconductor-electrolyte solar cells  

E-Print Network [OSTI]

-performance semiconductor-liquid junction solar cells. We propose in this work a macroscopic mathematical model, a sys- tem-liquid junction, solar cell simulation, naso-scale device modeling. 1 Introduction The mathematical modeling by the increasing need of simulation tools for designing efficient solar cells to harvest sunlight for clean energy

Ren, Kui

483

THROUGH-THE-GLASS SPECTROSCOPIC ELLIPSOMETRY OF CdTe SOLAR CELLS  

E-Print Network [OSTI]

THROUGH-THE-GLASS SPECTROSCOPIC ELLIPSOMETRY OF CdTe SOLAR CELLS Jie Chen 1 , Jian Li 1 , Courtney of the optical structure of CdTe solar cells on transparent conducting oxide (TCO) coated glass superstrates. SE components from the coated glass before solar cell fabrication. A step-by-step fitting procedure identifies

Rockett, Angus

484

A simple solar cell series resistance measurement method J. Cabestany and L. Castaer  

E-Print Network [OSTI]

the series resistance of a solar cell is described. This procedure only needs dark I(V) measurements565 A simple solar cell series resistance measurement method J. Cabestany and L. Castañer E Physics Abstracts 73.40L The series resistance of a solar cell is a parameter of special interest because

Boyer, Edmond

485

The Role of Confined Water in Ionic Liquid Electrolytes for Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

The Role of Confined Water in Ionic Liquid Electrolytes for Dye- Sensitized Solar Cells Jiwon Jeon %) for applications such as nonvolatile electrolytes for dye-sensitized solar cells (DSSCs). This suggests a strategy Structure, Quantum Chemistry,General Theory The dye-sensitized solar cell (DSSC) proposed by Gratzel et al.1

Goddard III, William A.

486

innovati nNREL Designs Promising New Oxides for Solar Cells  

E-Print Network [OSTI]

material. The upper TCO contact in a solar cell allows light to reach the absorber material below, whichinnovati nNREL Designs Promising New Oxides for Solar Cells High-efficiency, thin-film solar cells electricity but are 90% transparent to visible light. Scientists at the National Renewable Energy Laboratory

487

Extended light scattering model incorporating coherence for thin-film silicon solar cells  

E-Print Network [OSTI]

Extended light scattering model incorporating coherence for thin-film silicon solar cells Thomas film solar cells. The model integrates coherent light propagation in thin layers with a direct, non potential for light trapping in textured thin film silicon solar cells. VC 2011 American Institute

Lenstra, Arjen K.

488

Silicon Solar Cell Light-Trapping Using Defect Mode Photonic Kelsey A. Whitesell*a  

E-Print Network [OSTI]

Silicon Solar Cell Light-Trapping Using Defect Mode Photonic Crystals Kelsey A. Whitesell to enhance performance of thin film solar cells because of their unique ability to control light. We show for light trapping in thin film photovoltaics. Keywords: photonic crystals, defect, silicon, solar cell

Atwater, Harry

489

Angular constraint on light-trapping absorption enhancement in solar cells and Shanhui Fan  

E-Print Network [OSTI]

Angular constraint on light-trapping absorption enhancement in solar cells Zongfu Yua and Shanhui 2010; accepted 5 December 2010; published online 4 January 2011 Light trapping for solar cells can to both random tex- tured and periodic absorbers. To model light trapping in solar cells, we consider

Fan, Shanhui

490

Light harvesting by planar photonic crystal in solar cells: The case of amorphous silicon  

E-Print Network [OSTI]

Light harvesting by planar photonic crystal in solar cells: The case of amorphous silicon Guillaume on light management in silicon thin film solar cells, using photonic crystals (PhC) structures. We by means of optical simulations performed on realistic thin film solar cell stacks. Theoretically

Boyer, Edmond

491

Metal-black scattering centers to enhance light harvesting by thin-film solar cells  

E-Print Network [OSTI]

Metal-black scattering centers to enhance light harvesting by thin-film solar cells Deep Panjwania as scattering centers to increase the effective optical thickness of thin-film solar cells. The particular type. Gold-black was deposited on commercial thin-film solar cells using a thermal evaporator in nitrogen

Peale, Robert E.

492

innovati nAward-Winning Etching Process Cuts Solar Cell Costs  

E-Print Network [OSTI]

are wasted. Manufacturers have devised ways to boost the amount of light absorbed by silicon solar cellsinnovati nAward-Winning Etching Process Cuts Solar Cell Costs In general, when it comes to photovoltaic (PV) solar cells, the higher their efficiency, the higher their price tag. To increase cell

493

FRONTIERS ARTICLE Efficiency enhancement of copper contaminated radial pn junction solar cells  

E-Print Network [OSTI]

energy represents one of the most important sustainable and renewable energy sources. The most common power from solar cells [1]. The reason is that crystalline silicon solar cell manufacturingFRONTIERS ARTICLE Efficiency enhancement of copper contaminated radial pn junction solar cells

Yang, Peidong

494

EE580 Solar Cell Basics for Teachers Dr. Todd J. Kaiser  

E-Print Network [OSTI]

1 EE580 Solar Cell Basics for Teachers Dr. Todd J. Kaiser Cobleigh 531 994-7276 tjkaiser and Protocol 1Montana State University: Solar Cells Lecture 1: Introduction Course Objectives · Train Teachers in the Science behind Solar Cells · Introduce the student to the techniques and equipment used

Kaiser, Todd J.

495

Dual gratings for enhanced light trapping in thin-film solar cells  

E-Print Network [OSTI]

, Ireland * christian.schuster@york.ac.uk Abstract: Thin film solar cells benefit significantly from; (350.6050) Solar energy. References and links 1. M. A. Green, J. Zhao, A. Wang, and S. R. Wenham, "Progress and outlook for high-efficiency crystalline silicon solar cells," Sol. Energy Mater. Sol. Cells 65

496

Solar Cells from Earth-Abundant Semiconductors with Plasmon-Enhanced Light Absorption  

SciTech Connect (OSTI)

Progress is reported in these areas: Plasmonic Light Trapping in Thin Film a-Si Solar Cells; Plasmonic Light Trapping in Thin InGaN Quantum Well Solar Cells; and Earth Abundant Cu{sub 2}O and Zn{sub 3}P{sub 2} Solar Cells.

Atwater, Harry

2012-04-30T23:59:59.000Z

497

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

E-Print Network [OSTI]

energy is being held back by the high prices of the photovoltaic panels. AR materials deposited by self 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.

498

Ambient-Processed Colloidal Quantum Dot Solar Cells via Individual Pre-Encapsulation of Nanoparticles  

E-Print Network [OSTI]

Ambient-Processed Colloidal Quantum Dot Solar Cells via Individual Pre-Encapsulation, 2010; E-mail: ted.sargent@utoronto.ca Solution-processed solar cells employing colloidal quantum dots-junction and tandem solar cells both rely on IR-band-gap semiconductors, there has been much recent emphasis

499

Integration of High Efficiency Solar Cells on Carriers for Concentrating System Applications .  

E-Print Network [OSTI]

??High efficiency multi-junction (MJ) solar cells were packaged onto receiver systems. The efficiency change of concentrator cells under continuous high intensity illumination was done. Also, (more)

Chow, Simon Ka Ming

2011-01-01T23:59:59.000Z

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E-Print Network 3.0 - amorphous-silicon solar cells Sample Search...  

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

with silver nanoparticlessolar cells with silver nanoparticles C. Eminian, F... silicon solar cells to achieve light trapping. Nanoparticles have a size 200nm and are...