National Library of Energy BETA

Sample records for gateway solar thin

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

    E-Print Network [OSTI]

    Huang, Jianqiao

    2012-01-01

    microcrystalline silicon thin films and solar cells. Journalof a p-i-n thin-film solar cell with front transparent con-microcrystalline silicon thin film solar cells. Solar Energy

  2. Material Development for Highly Processable Thin Film Solar Cells

    E-Print Network [OSTI]

    Bob, Brion

    2014-01-01

    Structuring of Thin-film Solar Cells with a Single Laser1. Background on Thin Film Solar Cells and TransparentCuIn(Se,S)2 thin film solar cells: Secondary phases and

  3. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    to High-Efficiency CZTSSe Thin-film Solar Cells, Proc. IEEEMetal chalcogenide-based thin film solar cells are currentlyof metal chalcogenide thin film solar cells A dissertation

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

    E-Print Network [OSTI]

    Huang, Jianqiao

    2012-01-01

    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,

  5. Photovoltaic Performance and Reliability Database: A Gateway to Experimental Data Monitoring Projects for PV at the Florida Solar Energy Center

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    This site is the gateway to experimental data monitoring projects for photovoltaic (PV) at the Florida Solar Energy Center. The website and the database were designed to facilitate and standardize the processes for archiving, analyzing and accessing data collected from dozens of operational PV systems and test facilities monitored by FSEC's Photovoltaics and Distributed Generation Division. [copied from http://www.fsec.ucf.edu/en/research/photovoltaics/data_monitoring/index.htm

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

    E-Print Network [OSTI]

    Huang, Jianqiao

    2012-01-01

    Solar Energy Materials and Solar Cells, 86:207–216, 2005. [silicon thin films and solar cells. Journal of Appliedof a p-i-n thin-film solar cell with front transparent con-

  7. NERSC Science Gateways

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

    Users Science Gateways Science Gateways About Science Gateways A science gateway is a web based interface to access HPC computers and storage systems. Gateways allow science...

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

    E-Print Network [OSTI]

    Chung, Choong-Heui

    2012-01-01

    CuIn(Se,S) 2 thin film solar cells: secondary phaseChalcopyrite Thin Film Solar Cells: Materials Chemistry,Chalcopyrite Thin Film Solar Cells: Materials Chemistry,

  9. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    for further improvement on CZTS solar cells efficiency.improvement. Figure 6.1 Efficiency progress for hydrazine solution processing CIGS and CZTS thin film solar cells

  10. Accounting for Localized Defects in the Optoelectronic Design of Thin-Film Solar Cells

    E-Print Network [OSTI]

    Deceglie, Michael G.

    2014-01-01

    in ultrathin plasmonic solar cells," Optics Express, vol.Bailat, "Thin-film silicon solar cell technology," Progresstrapping in silicon thin film solar cells," Solar Energy,

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

    E-Print Network [OSTI]

    Huang, Jianqiao

    2012-01-01

    Solar Energy Materials and Solar Cells, 86:207–216, 2005. [silicon thin films and solar cells. Journal of Appliedtrapping in nanostructured solar cells. ACS Nano, 5:10055–

  12. Thin film absorber for a solar collector

    DOE Patents [OSTI]

    Wilhelm, William G. (Cutchogue, NY)

    1985-01-01

    This invention pertains to energy absorbers for solar collectors, and more particularly to high performance thin film absorbers. The solar collectors comprising the absorber of this invention overcome several problems seen in current systems, such as excessive hardware, high cost and unreliability. In the preferred form, the apparatus features a substantially rigid planar frame with a thin film window bonded to one planar side of the frame. An absorber in accordance with the present invention is comprised of two thin film layers that are sealed perimetrically. In a preferred embodiment, thin film layers are formed from a metal/plastic laminate. The layers define a fluid-tight planar envelope of large surface area to volume through which a heat transfer fluid flows. The absorber is bonded to the other planar side of the frame. The thin film construction of the absorber assures substantially full envelope wetting and thus good efficiency. The window and absorber films stress the frame adding to the overall strength of the collector.

  13. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    S. Guha, High-Efficiency Cu2ZnSnSe4 Solar Cells with a TiNfurther improvement on CZTS solar cells efficiency. Finally,Route to High-Efficiency CZTSSe Thin-film Solar Cells, Proc.

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

    E-Print Network [OSTI]

    Huang, Jianqiao

    2012-01-01

    modeling of ? -Si : H solar cells with rough interfaces:of a p-i-n thin-film solar cell with front transparent con-amorphous-silicon-based P-I-N solar cells deposited on rough

  15. Accounting for Localized Defects in the Optoelectronic Design of Thin-Film Solar Cells

    E-Print Network [OSTI]

    Deceglie, Michael G.

    2014-01-01

    trapping in silicon thin film solar cells," Solar Energy,textured surfaces in thin-film solar cells," Opt. Express,Design of Plasmonic Thin-Film Solar Cells with Broadband

  16. A survey of thin-film solar photovoltaic industry & technologies

    E-Print Network [OSTI]

    Grama, Sorin

    2007-01-01

    A new type of solar cell technology using so-called thin-film solar photovoltaic material has the potential to make a great impact on our lives. Because it uses very little or no silicon at all, thin- film (TF) solar ...

  17. Tax Credits Give Thin-Film Solar a Big Boost

    Office of Energy Efficiency and Renewable Energy (EERE)

    California company will expand its capacity to make its thin-film solar panels by more than ten times, thanks to two Recovery Act tax credits.

  18. Thin Film Solar Technologies | Open Energy Information

    Open Energy Info (EERE)

    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 QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EISTJThin Film Solar Technologies Jump to: navigation, search Name: Thin

  19. Band Gap Energy of Chalcopyrite Thin Film Solar Cell Absorbers Determined by Soft X-Ray Emission and Absorption Spectroscopy

    E-Print Network [OSTI]

    Bar, M.

    2010-01-01

    OF CHALCOPYRITE THIN FILM SOLAR CELL ABSORBERS DETERMINED BYchalcopyrite thin film solar cell absorbers significantlyof chalcopyrite thin film solar cell absorbers. excitation

  20. Modeling of thin-film solar thermoelectric generators

    E-Print Network [OSTI]

    Weinstein, Lee Adragon

    Recent advances in solar thermoelectric generator (STEG) performance have raised their prospect as a potential technology to convert solar energy into electricity. This paper presents an analysis of thin-film STEGs. ...

  1. Mode Splitting for Efficient Plasmoinc Thin-film Solar Cell

    E-Print Network [OSTI]

    Li, Tong; Jiang, Chun

    2010-01-01

    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.

  2. Efficient light-trapping nanostructures in thin silicon solar cells

    E-Print Network [OSTI]

    Han, Sang Eon

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

  3. Efficient light trapping structure in thin film silicon solar cells

    E-Print Network [OSTI]

    Sheng, Xing

    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, ...

  4. Gateway Design for Data Gathering Sensor Raluca Musaloiu-E.

    E-Print Network [OSTI]

    Amir, Yair

    such a gateway requires special energy sources, such as rechargeable batteries coupled with solar panels@cs.jhu.edu Abstract--Innovation in gateways for data gathering sensor networks has lagged compared to advances in mote investigate mechanisms to minimize energy consumption at the gateway including completely powering it off

  5. Overview and Challenges of Thin Film Solar Electric Technologies

    SciTech Connect (OSTI)

    Ullal, H. S.

    2008-12-01

    In this paper, we report on the significant progress made worldwide by thin-film solar cells, namely, amorphous silicon (a-Si), cadmium telluride (CdTe), and copper indium gallium diselenide (CIGS). Thin-film photovoltaic (PV) technology status is also discussed in detail. In addition, R&D and technology challenges in all three areas are elucidated. The worldwide estimated projection for thin-film PV technology production capacity announcements are estimated at more than 5000 MW by 2010.

  6. Accounting for Localized Defects in the Optoelectronic Design of Thin-Film Solar Cells

    E-Print Network [OSTI]

    Deceglie, Michael G.

    2014-01-01

    W. Prather, "Thin film solar cell design based on photonicH. A. Atwater, "Design of nanostructured solar cells usingBrongersma, "Design of Plasmonic Thin-Film Solar Cells with

  7. Science Gateways

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| Stanford SynchrotronVideo-Contest December 17, 2015Gateways

  8. Polycrystalline Thin Film Solar Cell Technologies: Preprint

    SciTech Connect (OSTI)

    Ullal, H. S.

    2008-12-01

    Rapid progress is being made by CdTe and CIGS-based thin-film PV technologies in entering commercial markets.

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

    E-Print Network [OSTI]

    Sites, James R.

    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-FILM SOLAR CELLS The CdTe thin-film solar cell has a large absorption coefficient and high theoretical

  10. Near perfect solar absorption in ultra-thin-film GaAs photonic crystals

    E-Print Network [OSTI]

    John, Sajeev

    Near perfect solar absorption in ultra-thin-film GaAs photonic crystals Sergey Eyderman,*a Alexei voltage of GaAs solar cells. The current world record for high efficiency solar cells is held by thin ultra-thin (GaAs in low-cost solar cells. However, this reduction in the volume

  11. Dielectric back scattering patterns for light trapping in thin-film Si solar cells

    E-Print Network [OSTI]

    Polman, Albert

    Dielectric back scattering patterns for light trapping in thin-film Si solar cells M. van Lare,1 of dielectric and metallic backscattering patterns in thin-film a-Si:H solar cells. We compare devices for Light Trapping in Thin-Film Silicon Solar Cells", in Proceedings of the 23rd European Photovoltaic Solar

  12. Polycrystalline Thin-Film Multijunction Solar Cells

    SciTech Connect (OSTI)

    Noufi, R.; Wu, X.; Abu-Shama, J.; Ramanathan, K; Dhere, R.; Zhou, J.; Coutts, T.; Contreras, M.; Gessert, T.; Ward, J. S.

    2005-11-01

    We present a digest of our research on the thin-film material components that comprise the top and bottom cells of three different material systems and the tandem devices constructed from them.

  13. Enabling Thin Silicon Solar Cell Technology

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

    has spurred companies to reduce the cost and increase the reliability of their solar photovoltaics (SPVs). The use of thinner silicon in SPV technologies is being widely...

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

    E-Print Network [OSTI]

    Pulfrey, David L.

    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

  15. EARTH ABUNDANT MATERIALS FOR HIGH EFFICIENCY HETEROJUNCTION THIN FILM SOLAR CELLS

    E-Print Network [OSTI]

    Ceder, Gerbrand

    materials for thin film solar cells such as CdTe and CIGS suffer from concerns over resource scarcity (eEARTH ABUNDANT MATERIALS FOR HIGH EFFICIENCY HETEROJUNCTION THIN FILM SOLAR CELLS Yun Seog Lee 1 conversion efficiencies should be increased. In terms of reducing module cost, thin film solar cells

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

    E-Print Network [OSTI]

    Van Stryland, Eric

    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

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

    E-Print Network [OSTI]

    Peale, Robert E.

    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

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

    E-Print Network [OSTI]

    CARRIER COLLECTION IN THIN-FILM CDTE SOLAR CELLS: THEORY AND EXPERIMENT A.E. Delahoy, Z. Cheng different wavelengths. Keywords: CdTe, thin film solar cell, modeling 1 INTRODUCTION Traditional Si p, Jsc, is independent of voltage, i.e. superposition holds. Thin film CdTe solar cells deviate from

  19. Enhanced efficiency of thin film solar cells using a shifted dual grating plasmonic structure

    E-Print Network [OSTI]

    Levy, Uriel

    Enhanced efficiency of thin film solar cells using a shifted dual grating plasmonic structure Ronen, "Light absorption enhancement in thin-film solar cells using whispering gallery modes in dielectric in thin film solar cells," Appl. Phys. Lett. 99(13), 131114 (2011). 10. H. R. Stuart and D. G. Hall

  20. Light trapping in thin-film solar cells with randomly rough and hybrid

    E-Print Network [OSTI]

    Light trapping in thin-film solar cells with randomly rough and hybrid textures Piotr Kowalczewski. M. Smets, and M. Zeman, "Plasmonic light trapping in thin-film silicon solar cells with improved Lambertian limits in thin film silicon solar cells with 1D and 2D periodic patterns," Opt. Express 20, A224­A

  1. Engineering Gaussian disorder at rough interfaces for light trapping in thin-film solar cells

    E-Print Network [OSTI]

    Engineering Gaussian disorder at rough interfaces for light trapping in thin-film solar cells Piotr A theoretical study of randomly rough interfaces to obtain light trapping in thin-film silicon solar cells of thin-film solar cells. © 2012 Optical Society of America OCIS codes: 040.5350, 050.1950. Reducing

  2. LOSS ANALYSIS OF BACK-CONTACT BACK-JUNCTION THIN-FILM MONOCRYSTALLINE SILICON SOLAR CELLS

    E-Print Network [OSTI]

    LOSS ANALYSIS OF BACK-CONTACT BACK-JUNCTION THIN-FILM MONOCRYSTALLINE SILICON SOLAR CELLS F. Haase losses in back-contact back- junction monocrystalline thin-film silicon solar cells. The cells are made for back-contact back- junction (BC BJ) monocrystalline thin-film silicon solar cells using the PSI process

  3. Light trapping in thin-film solar cells via scattering by nanostructured antireflection coatings

    E-Print Network [OSTI]

    Yu, Edward T.

    Light trapping in thin-film solar cells via scattering by nanostructured antireflection coatings X://jap.aip.org/authors #12;Light trapping in thin-film solar cells via scattering by nanostructured antireflection coatings X of nanostructured TiO2 layers fabricated on thin-film solar cells to provide, simultaneously, both antireflection

  4. Mechanics of thin-film transistors and solar cells on flexible substrates

    E-Print Network [OSTI]

    Suo, Zhigang

    Mechanics of thin-film transistors and solar cells on flexible substrates Helena Gleskova a,*, I be minimized throughout the fab- rication process. Amorphous silicon thin-film transistors and solar cells rights reserved. Keywords: Amorphous silicon; Thin-film transistor; Solar cell; Flexible electronics 1

  5. Light trapping regimes in thin-film silicon solar cells with a photonic pattern

    E-Print Network [OSTI]

    Light trapping regimes in thin-film silicon solar cells with a photonic pattern Simone Zanotto a theoretical study of crystalline and amorphous silicon thin-film solar cells with a periodic pattern on a sub. Poortmans and V. Arkhipov (editors), Thin Film Solar Cells (Wiley, Chichester 2006). 4. P. W¨urfel, Physics

  6. ENGINEERED SUBSTRATES FOR THIN-FILM SOLAR CELLS: SCATTERING PROPERTIES OF 1D ROUGHNESS

    E-Print Network [OSTI]

    ENGINEERED SUBSTRATES FOR THIN-FILM SOLAR CELLS: SCATTERING PROPERTIES OF 1D ROUGHNESS S. Del Sorbo, Optical Properties, Substrates, Texturisation, Thin Film Solar Cells 1 MOTIVATION OF THIS WORK The aim of thin film technology is to reduce both the electrical transport losses in the bulk region of a solar

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

    E-Print Network [OSTI]

    Grandidier, Jonathan

    Configuration Optimization of a Nanosphere Array on Top of a Thin Film Solar Cell J. Grandidier photocurrent of the solar cell. On a typical thin film amorphous silicon solar cell, a parametric analysis of SiO2 spheres directly placed on top of a-Si [1] and gallium arsenide (GaAs) [3] solar cells. We

  8. Substrate for thin silicon solar cells

    DOE Patents [OSTI]

    Ciszek, T.F.

    1995-03-28

    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.

  9. Substrate for thin silicon solar cells

    DOE Patents [OSTI]

    Ciszek, Theodore F. (Evergreen, CO)

    1995-01-01

    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.

  10. Thin-film absorber for a solar collector

    SciTech Connect (OSTI)

    Wilhelm, W.G.

    1982-02-09

    This invention pertains to energy absorbers for solar collectors, and more particularly to high performance thin film absorbers. The solar collectors comprising the absorber of this invention overcome several problems seen in current systems, such as excessive hardware, high cost and unreliability. In the preferred form, the apparatus features a substantially rigid planar frame with a thin film window bonded to one planar side of the frame. An absorber in accordance with the present invention is comprised of two thin film layers that are sealed perimetrically. In a preferred embodiment, thin film layers are formed from a metal/plastic laminate. The layers define a fluid-tight planar envelope of large surface area to volume through which a heat transfer fluid flows. The absorber is bonded to the other planar side of the frame. The thin film construction of the absorber assures substantially full envelope wetting and thus good efficiency. The window and absorber films stress the frame adding to the overall strength of the collector.

  11. Thin film solar cell including a spatially modulated intrinsic layer

    DOE Patents [OSTI]

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

    1989-03-28

    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.

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

    E-Print Network [OSTI]

    Sites, James R.

    OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS Thin-film solar cells have the potential to be an important contributor to the global energy demand by the mid-21st-century. Cu(In,Ga)Se2 (CIGS) solar cells, which haveDISSERTATION DEVICE PHYSICS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS Submitted by Markus Gloeckler

  13. Computational analysis of thin film InGaAs/GaAs quantum well solar cells with

    E-Print Network [OSTI]

    Yu, Edward T.

    Computational analysis of thin film InGaAs/GaAs quantum well solar cells with back side light, Austin, TX 78758, USA * ety@ece.utexas.edu Abstract: Simulations of thin film (~2.5 µm thick) InGaAs/GaAs. Roberts, G. Hill, and C. Calder, "Progress in quantum well solar cells," Thin Solid Films 511­512, 76

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

    E-Print Network [OSTI]

    Sites, James R.

    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

  15. BACK CONTACT MONOCRYSTALLINE THIN-FILM SILICON SOLAR CELLS FROM THE POROUS SILICON PROCESS

    E-Print Network [OSTI]

    BACK CONTACT MONOCRYSTALLINE THIN-FILM SILICON SOLAR CELLS FROM THE POROUS SILICON PROCESS F. Haase contact cells. Kraiem et al [7] made a back contact thin film monocrystalline solar cell with cell), Am Ohrberg 1, D-31860 Emmerthal, Germany ABSTRACT We develop a back contact monocrystalline thin-film

  16. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    properties,” Solar Energy Materials and Solar Cells, vol.G. Dhere, Solar Energy Materials and Solar Cells 2006 , 90,devices, Solar Energy Materials and Solar Cells (2012), doi:

  17. Focused ion beam specimen preparation for electron holography of electrically biased thin film solar cells

    E-Print Network [OSTI]

    Dunin-Borkowski, Rafal E.

    solar cells M. Duchamp1 , M. den Hertog2 , R. Imlau1 , C. B. Boothroyd1 , A. Kovács1 , A. H. Tavabi1, biased TEM specimen, thin film solar cell, FIB Thin films of hydrogenated Si (Si:H) can be used as active absorber layers in solar cells deposited on low cost substrates using plasma-enhanced chemical vapour

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

    E-Print Network [OSTI]

    Dual gratings for enhanced light trapping in thin-film solar cells by a layer-transfer technique, Ireland * christian.schuster@york.ac.uk Abstract: Thin film solar cells benefit significantly from, "Progress and outlook for high-efficiency crystalline silicon solar cells," Sol. Energy Mater. Sol. Cells 65

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

    E-Print Network [OSTI]

    to bring down the cost of photovoltaic (PV) solar cells has gained huge momentum, and many strategiesOptimization 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 metallic

  20. DISSERTATION ANALYSIS OF IMPACT OF NON-UNIFORMITIES ON THIN-FILM SOLAR CELLS

    E-Print Network [OSTI]

    Sites, James R.

    DISSERTATION ANALYSIS OF IMPACT OF NON-UNIFORMITIES ON THIN-FILM SOLAR CELLS AND MODULES WITH 2-D-FILM SOLAR CELLS AND MODULES WITH 2-D SIMULATIONS BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS-UNIFORMITIES ON THIN-FILM SOLAR CELLS AND MODULES WITH 2-D SIMULATIONS Clean and environmentally friendly photovoltaic

  1. Silicon epitaxy below 200C: Towards thin crystalline solar cells R. Carioua,b

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . However material still represent more than 40% of the cost of c-Si PV Thin Film Solar Technology IV-Si) technology. Indeed, the learning curve of c-Si solar cells has reached a plateau since 1999 with the 25Silicon epitaxy below 200°C: Towards thin crystalline solar cells R. Carioua,b , R. Ruggeria,c , P

  2. Photonic light trapping and electrical transport in thin-film silicon solar cells

    E-Print Network [OSTI]

    Photonic light trapping and electrical transport in thin-film silicon solar cells Lucio Claudio Keywords: Thin-film solar cells Light trapping Photonic structures Carrier collection Electro-optical simulations Surface recombination a b s t r a c t Efficient solar cells require both strong absorption

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

    E-Print Network [OSTI]

    Lenstra, Arjen K.

    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 efficiency spectra of state-of-the-art microcrystalline silicon solar cells. The simulations agree very well

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

    E-Print Network [OSTI]

    Peale, Robert E.

    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

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

    E-Print Network [OSTI]

    Fan, Shanhui

    Resonant cavity enhanced light harvesting in flexible thin-film organic solar cells Nicholas P of solar energy conversion be- cause they use thin films of photoactive material and can be manufactured and photocurrent in flexible organic solar cells. We demonstrate that this enhancement is attributed to a broadband

  6. High efficiency thin film silicon solar cells with novel light trapping : principle, design and processing

    E-Print Network [OSTI]

    Zeng, Lirong, Ph. D. Massachusetts Institute of Technology

    2008-01-01

    One major efficiency limiting factor in thin film solar cells is weak absorption of long wavelength photons due to the limited optical path length imposed by the thin film thickness. This is especially severe in Si because ...

  7. Methods for fabricating thin film III-V compound solar cell

    DOE Patents [OSTI]

    Pan, Noren; Hillier, Glen; Vu, Duy Phach; Tatavarti, Rao; Youtsey, Christopher; McCallum, David; Martin, Genevieve

    2011-08-09

    The present invention utilizes epitaxial lift-off in which a sacrificial layer is included in the epitaxial growth between the substrate and a thin film III-V compound solar cell. To provide support for the thin film III-V compound solar cell in absence of the substrate, a backing layer is applied to a surface of the thin film III-V compound solar cell before it is separated from the substrate. To separate the thin film III-V compound solar cell from the substrate, the sacrificial layer is removed as part of the epitaxial lift-off. Once the substrate is separated from the thin film III-V compound solar cell, the substrate may then be reused in the formation of another thin film III-V compound solar cell.

  8. Thin film cadmium telluride and zinc phosphide solar cells

    SciTech Connect (OSTI)

    Chu, T.

    1984-10-01

    This report describes research performed from June 1982 to October 1983 on the deposition of cadmium telluride films by direct combination of the cadmium and tellurium vapor on foreign substrates. Nearly stoichiometric p-type cadmium telluride films and arsenic-doped p-type films have been prepared reproducibly. Major efforts were directed to the deposition and characterization of heterojunction window materials, indium tin oxide, fluorine-doped tin oxide, cadmium oxide, and zinc oxide. A number of heterojunction solar cells were prepared, and the best thin-film ITO/CdTe solar cells had an AMl efficiency of about 7.2%. Zinc phosphide films were deposited on W/steel substrates by the reaction of zinc and phosphine in a hydrogen flow. Films without intentional doping had an electrical resistivity on the order of 10/sup 6/ ohm-cm, and this resistivity may be reduced to about 5 x 10/sup 4/ ohm-cm by adding hydrogen chloride or hydrogen bromide to the reaction mixture. Lower resistivity films were deposited by adding a controlled amount of silver nitrate solution on to the substrate surface. Major efforts were directed to the deposition of low-resistivity zinc selenide in order to prepare ZnSe/An/sub 3/P/sub 2/ heterojunction thin-film solar cells. However, zinc selenide films deposited by vacuum evaporation and chemical vapor deposition techniques were all of high resistivity.

  9. p-Doping limit and donor compensation in CdTe polycrystalline thin film solar cells

    E-Print Network [OSTI]

    p-Doping limit and donor compensation in CdTe polycrystalline thin film solar cells Ken K. Chin n substitution of Cd CuCd 0=À #12; #12; play critical roles in p-doping of CdTe in CdS/CdTe thin film solar cells in Fig. 1. As for the CdTe polycrystalline thin film in a CdS/CdTe solar cell, it is still being debated

  10. Anti-reflection zinc oxide nanocones for higher efficiency thin-film silicon solar cells

    E-Print Network [OSTI]

    Mailoa, Jonathan P

    2012-01-01

    Thin film silicon solar cells, which are commonly made from microcrystalline silicon ([mu]c-Si) or amorphous silicon (a-Si), have been considered inexpensive alternatives to thick polycrystalline silicon (polysilicon) solar ...

  11. Studies of thin film hydrogenated silicon solar cells using electron energy-loss spectroscopy in the transmission electron microscope

    E-Print Network [OSTI]

    Dunin-Borkowski, Rafal E.

    Studies of thin film hydrogenated silicon solar cells using electron energy-loss spectroscopy (TEM) to study n-i-p thin film Si solar cells grown on steel foil or glass substrates. For a solar cell experiment, we study the chemical compositions of defective regions in thin film Si solar cells using energy

  12. Junction Evolution During Fabrication of CdS/CdTe Thin-film PV Solar Cells (Presentation)

    SciTech Connect (OSTI)

    Gessert, T. A.

    2010-09-01

    Discussion of the formation of CdTe thin-film PV junctions and optimization of CdTe thin-film PV solar cells.

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

    E-Print Network [OSTI]

    Alam, Muhammad A.

    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

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

    E-Print Network [OSTI]

    Yu, Edward T.

    and optimization of light-trapping structures for efficient thin-film solar cells Claiborne O McPheeters1 , Dongzhi elements are integrated for light trapping. Measurements and simulations of GaAs solar cells with less than in their performance. Keywords: quantum-well, quantum-dot, scattering, diffraction, thin-film, GaAs, InAs, photovoltaic

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

    E-Print Network [OSTI]

    Huang, Jianqiao

    2012-01-01

    151 Two-stage thin film deposition process15 Description of thin film depositionProcess Model . . . . 54 Porous Thin-Film Deposition Process

  16. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    Solar Energy Materials and Solar Cells 2006 , 90, 2181–Solar Energy Materials and Solar Cells, vol. 95, no. 8, pp.Energy Materials and Solar Cells (2012), doi:10.1016/j.

  17. Your GatewaY

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

    http:www.osti.govnle Your GatewaY to InformatIon across the Department of enerGY The National Library of Energy Beta search tool provides one-stop access to DOE information in...

  18. High Efficiency Thin Film CdTe and a-Si Based Solar Cells Annual Technical Report for the Period

    E-Print Network [OSTI]

    Deng, Xunming

    High Efficiency Thin Film CdTe and a-Si Based Solar Cells Annual Technical Report for the Period This report covers the second year of this subcontract for research on high efficiency CdTe-based thin-film solar cells and on high efficiency a-Si-based thin-film solar cells. The effort on CdTe- based materials

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

    E-Print Network [OSTI]

    Alam, Muhammad A.

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

  20. Improved red-response in thin film a-Si:H solar cells with soft-imprinted plasmonic back reflectors

    E-Print Network [OSTI]

    Polman, Albert

    Improved red-response in thin film a-Si:H solar cells with soft-imprinted plasmonic back reflectors is a critical component of solar cell development. In typical thin film cells the thickness of the absorbing of photovoltaic power. Thin film Si solar cells using hydrogenated amorphous Si a-Si:H and nano- crystalline Si nc

  1. Mode coupling by plasmonic surface scatterers in thin-film silicon solar cells M. van Lare,1

    E-Print Network [OSTI]

    Polman, Albert

    Mode coupling by plasmonic surface scatterers in thin-film silicon solar cells M. van Lare,1 F a completed thin-film a-Si:H solar cell. Current-voltage measurements show a photocurrent enhancement of 10 of Physics. [http://dx.doi.org/10.1063/1.4767997] Thin-film solar cells offer the potential of high photovol

  2. CRYSTALLINE SILICON THIN-FILM SOLAR CELLS FROM THE POROUS SILICON PROCESS APPLYING CONVECTION ASSISTED CHEMICAL VAPOR DEPOSITION

    E-Print Network [OSTI]

    CRYSTALLINE SILICON THIN-FILM SOLAR CELLS FROM THE POROUS SILICON PROCESS APPLYING CONVECTION for the first time to monocrystalline Si thin-film solar cells from the porous silicon (PSI) layer transfer for manufacturing high efficiency silicon thin-film solar cells. Industrially feasible epitaxy systems therefore

  3. Transparent electrode requirements for thin film solar cell modules Michael W. Rowell and Michael D. McGehee*

    E-Print Network [OSTI]

    McGehee, Michael

    Transparent electrode requirements for thin film solar cell modules Michael W. Rowell and Michael D The transparent conductor (TC) layer in thin film solar cell modules has a significant impact on the power to replace conducting oxides in this geometry. Thin film solar cell modules can be manufactured either

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

    E-Print Network [OSTI]

    Fan, Shanhui

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

  5. Sputtered Molybdenum Bilayer Back Contact for Copper Indium Diselenide-Based Polycrystalline Thin-Film Solar Cells

    E-Print Network [OSTI]

    Scofield, John H.

    -of-the-art polycrystalline copper indium gallium diselenide solar cells with good results. Thin Solid Films, 260 (1), pp. 26), have emerged as promising polycrystalline thin-film semiconductors for solar cell absorber layers.2 polycrystalline thin-film photovoltaic (PV) technology. 3 Solar cells fabricated at the National Renewable Energy

  6. 554 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 4, NO. 2, MARCH 2014 Light Trapping in Thin Crystalline Si Solar Cells

    E-Print Network [OSTI]

    Polman, Albert

    --Dielectric nanoparticles placed on top of a thin-film solar cell strongly enhance light absorption in the cell over a broad to the fab- rication of thin-film c-Si solar cells on glass substrates by liquid phase crystallization [1 into thin (1­100 m) crystalline Si solar cells patterned with Si nanocylinder arrays on top of the cell. We

  7. Diffusion of indium and gallium in Cu(In,Ga)Se2 thin film solar cells

    E-Print Network [OSTI]

    Rockett, Angus

    Diffusion of indium and gallium in Cu(In,Ga)Se2 thin film solar cells O. Lundberga,*, J. Lua , A conversion efficiency of solar cells made from this material [1]. One of the special qualities of the CIGS improve the solar cell performance. In many of the different CIGS fabrication techniques, an in depth

  8. Photon-Electron Harvesting in Thin-Film Flexible Solar Cells

    E-Print Network [OSTI]

    Wu, Shin-Tson

    ) Dr. Debashis Chanda's Group Cost effective and high efficiency solar cells are important in orderPhoton-Electron Harvesting in Thin-Film Flexible Solar Cells Javaneh Boroumand (12:00 PM ­ 12:30 PM-crystalline silicon (c- Si) remained number one material of choice for harnessing solar energy due to natural

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

    E-Print Network [OSTI]

    Atwater, Harry

    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

  10. LAYER TRANSFER OF LARGE AREA MACROPOROUS SILICON FOR MONOCRYSTALLINE THIN-FILM SOLAR CELLS

    E-Print Network [OSTI]

    LAYER TRANSFER OF LARGE AREA MACROPOROUS SILICON FOR MONOCRYSTALLINE THIN-FILM SOLAR CELLS Marco-based solar cells is approximately 200 µm with a kerf loss of about 100 µm caused by wire sawing. However, lower wafer thicknesses are sufficient for achieving high solar cell efficiencies exceeding 20 % [1

  11. Rapid Deposition Technology Holds the Key for the World's Largest Manufacturer of Thin-Film Solar Modules (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-08-01

    First Solar, Inc. has been collaborating with NREL since 1991, advancing its thin-film cadmium telluride solar technology to grow from a startup company to become one of the world's largest manufacturers of solar modules, and the world's largest manufacturer of thin-film solar modules.

  12. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    Energy Materials and Solar Cells (2012), doi:10.1016/j.Solar Energy Materials and Solar Cells 2012, [4-4] Q. Guo,Energy Materials and Solar Cells 2011, 95, 1421–1436. [4-18

  13. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    Processed Cu(In,Ga)(Se,S)2 Solar Cells,” Advanced Energyfor solution processed CuInSxSe2?x solar cells and itson defect properties,” Solar Energy Materials and Solar

  14. Towards the efficiency limits of silicon solar cells: how thin is too thin?

    E-Print Network [OSTI]

    Kowalczewski, Piotr

    2015-01-01

    It is currently possible to fabricate crystalline silicon solar cells with the absorber thickness ranging from a few hundreds of micrometers (conventional wafer-based cells) to devices as thin as $1\\,\\mu\\mathrm{m}$. In this work, we use a model single-junction solar cell to calculate the limits of energy conversion efficiency and estimate the optimal absorber thickness. The limiting efficiency for cells in the thickness range between 40 and $500\\,\\mu\\mathrm{m}$ is very similar and close to 29%. In this regard, we argue that decreasing the thickness below around $40\\,\\mu\\mathrm{m}$ is counter-productive, as it significantly reduces the maximum achievable efficiency, even when optimal light trapping is implemented. We analyse the roles of incomplete light trapping and extrinsic (bulk and surface) recombination mechanisms. For a reasonably high material quality, consistent with present-day fabrication techniques, the optimal thickness is always higher than a few tens of micrometers. We identify incomplete light ...

  15. TRANSMISSION ELECTRON MICROSCOPY OF THE TEXTURED SILVER BACK REFLECTOR OF A THIN FILM SILICON SOLAR CELL: FROM CRYSTALLOGRAPHY TO OPTICAL ABSORPTION

    E-Print Network [OSTI]

    Dunin-Borkowski, Rafal E.

    in amorphous, microcrystalline and micromorph thin-film Si solar cells is an important and active field-reflector of thin-film Si solar cells. 1 INTRODUCTION The study of light trapping in thin-film Si solar cells for an optimized back reflector structure in a microcrystalline thin film Si solar cell, when compared with the use

  16. Thin polymer film collectors as a contribution to the solar industry

    SciTech Connect (OSTI)

    Wilhelm, W.G.

    1984-06-01

    Achievements made in research on thin polymer film solar flat-plate collectors using monocoque construction techniques are briefly discussed. The significance of these achievements for cost reduction of flat-plate collectors without compromising performance is briefly discussed.

  17. Thin Film Solar Cells with Light Trapping Transparent Conducting Oxide Layer 

    E-Print Network [OSTI]

    Lu, Tianlin

    2012-07-16

    Thin film solar cells, if film thickness is thinner than the optical absorption length, typically give lower cell performance. For the thinner structure, electric current loss due to light penetration can offset the electric ...

  18. Earth abundant materials for high efficiency heterojunction thin film solar cells

    E-Print Network [OSTI]

    Buonassisi, Tonio

    We investigate earth abundant materials for thin-film solar cells that can meet tens of terawatts level deployment potential. Candidate materials are identified by combinatorial search, large-scale electronic structure ...

  19. Integrated photonic structures for light trapping in thin-film Si solar cells

    E-Print Network [OSTI]

    Sheng, Xing

    We explore the mechanisms for an efficient light trapping structure for thin-film silicon solar cells. The design combines a distributed Bragg reflector (DBR) and periodic gratings. Using photonic band theories and numerical ...

  20. CIGS Thin-Film Solar Cell Research at NREL: FY04 Results and...

    Office of Scientific and Technical Information (OSTI)

    No. DE-AC36-99-GO10337 Conference Paper NRELCP-520-37020 January 2005 CIGS Thin-Film Solar Cell Research at NREL: FY04 Results and Accomplishments K. Ramanathan, R.N....

  1. Efficiency calculations of thin-film GaAs solar cells on Si substrates

    SciTech Connect (OSTI)

    Yamaguchi, M.; Amano, C.

    1985-11-01

    Dislocation effect upon the efficiency of single-crystal thin-film AlGaAs-GaAs heteroface solar cells on Si substrates is analyzed. Solar-cell properties are calculated based on a simple model; in the model, dislocations act as recombination centers to reduce the minority-carrier diffusion length in each layer and increase the space-charge layer recombination current. Numerical analysis is also carried out to optimize thin-film AlGaAs-GaAs heteroface solar-cell structures. The fabrication of thin-film AlGaAs-GaAs heteroface solar cells with a practical efficiency larger than 18% on Si substrates appears possible if the dislocation density in the thin-film GaAs layer is less than 10/sup 6/ cm/sup -2/.

  2. Thin film GaAs solar cells on glass substrates by epitaxial liftoff

    SciTech Connect (OSTI)

    Lee, X.Y.; Goertemiller, M.; Boroditsky, M.; Ragan, R.; Yablonovitch, E.

    1997-02-01

    In this work, we describe the fabrication and operating characteristics of GaAs/AlGaAs thin film solar cells processed by the epitaxial liftoff (ELO) technique. This technique allows the transfer of these cells onto glass substrates. The performance of the lifted-off solar cell is demonstrated by means of electrical measurements under both dark and illuminated conditions. We have also optimized the light trapping conditions in this direct-gap material. The results show that good solar absorption is possible in active layers as thin as 0.32 {mu}m. In such a thin solar cell, the open circuit voltage would be enhanced. We believe that the combination of an epitaxial liftoff thin GaAs film, and nano-texturing can lead to record breaking performance. {copyright} {ital 1997 American Institute of Physics.}

  3. A Review of Thin Film Crystalline Silicon for Solar Cell Applications. Part 1 : Native Substrates.

    E-Print Network [OSTI]

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.5 Epilift process - Centre for Sustainable Energy Systems, ANU Systems Engineering Department, The Australian National University, ACT 0200, Australia. Email : michelleA Review of Thin Film Crystalline Silicon for Solar Cell Applications. Part 1 : Native Substrates

  4. Technological assessment of light-trapping technology for thin-film Si solar cell

    E-Print Network [OSTI]

    Susantyoko, Rahmat Agung

    2009-01-01

    The proposed light trapping technology of Distributed Bragg Reflector (DBR) with Diffraction Grating (DG) and Anti-Reflection Coating (ARC) for thin film Si solar cell was analyzed from the technology, market, and ...

  5. Volumetric plasmonic resonator architecture for thin-film solar cells Mustafa Akin Sefunc,a

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    Volumetric plasmonic resonator architecture for thin-film solar cells Mustafa Akin Sefunc,a Ali; published online 4 March 2011 We propose and demonstrate a design concept of volumetric plasmonic resonators

  6. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    Cu(In,Ga)(Se,S)2 Solar Cells,” Advanced Energy Materials,processed CuInSxSe2?x solar cells and its effect on defectEnergy Materials and Solar Cells, vol. 95, no. 8, pp. 2384–

  7. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    3-6,3-7] Chalcopyrite CIGS solar cells, without introducingperformance CISS and CIGS solar cells with efficiencies uptellurium might impede CIGS/CdTe solar cells from reaching

  8. Material Development for Highly Processable Thin Film Solar Cells

    E-Print Network [OSTI]

    Bob, Brion

    2014-01-01

    H. Sudibyo, and D. Hartanto, in Solar Cells - Research andon the Cu 2 (Zn,Sn)Se 4 solar cells open-circuit voltage. ”on the Cu 2 (Zn,Sn)Se 4 solar cells open-circuit voltage. ”

  9. Molecular solution processing of metal chalcogenide thin film solar cells

    E-Print Network [OSTI]

    Yang, Wenbing

    2013-01-01

    future global energy production. Solar electricity represents a direction of great potential toward a renewable,

  10. Electron energy-loss spectroscopy of boron-doped layers in amorphous thin film silicon solar cells

    E-Print Network [OSTI]

    Dunin-Borkowski, Rafal E.

    Electron energy-loss spectroscopy of boron-doped layers in amorphous thin film silicon solar cells. de Bariloche, Argentina 3 ECN Solar Energy, High Tech Campus, Building 5, 5656 AE Eindhoven energy-loss spectroscopy (EELS) is used to study p-doped layers in n-i-p amorphous thin film Si solar

  11. NREL Produces Highly Efficient, Wide-Bandgap, Thin-Film Solar Cells (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-09-01

    Researchers at the National Renewable Energy Laboratory (NREL) are finding new ways to manufacture thin-film solar cells made from copper, indium, gallium, and selenium - called CIGS cells - that are different than conventional CIGS solar cells. Their use of high-temperature glass, designed by SCHOTT AG, allows higher fabrication temperatures, opening the door to new CIGS solar cells employing light-absorbing materials with wide 'bandgaps.'

  12. Efficiency considerations for polycrystalline GaAs thin-film solar cells

    SciTech Connect (OSTI)

    Yamaguchi, M.; Itoh, Y.

    1986-07-01

    The effect of grain boundaries upon the efficiency of polycrystalline GaAs thin-film solar cells is analyzed. Solar-cell properties are calculated on a simple model where grain boundaries act as recombination centers to reduce the minority-carrier diffusion length in the solar cell's active layer and increase the space-charge layer recombination current. An effective diffusion length is expressed in terms of grain size, allowing the calculation of short-circuit current density and open-circuit voltage. Excellent agreement is obtained between theory and experiment. The fabrication of thin-film GaAs solar cells with an efficiency greater than 18% appears to be possible if the grain size in the thin-film GaAs layer with thickness of 3 ..mu..m is larger than 1000 ..mu..m.

  13. Enhanced Efficiency of Light-Trapping Nanoantenna Arrays for Thin Film Solar Cells

    E-Print Network [OSTI]

    Simovski, Constantin R; Voroshilov, Pavel M; Guzhva, Michael E; Belov, Pavel A; Kivshar, Yuri S

    2013-01-01

    We suggest a novel concept of efficient light-trapping structures for thin-film solar cells based on arrays of planar nanoantennas operating far from plasmonic resonances. The operation principle of our structures relies on the excitation of chessboard-like collective modes of the nanoantenna arrays with the field localized between the neighboring metal elements. We demonstrated theoretically substantial enhancement of solar-cell short-circuit current by the designed light-trapping structure in the whole spectrum range of the solar-cell operation compared to conventional structures employing anti-reflecting coating. Our approach provides a general background for a design of different types of efficient broadband light-trapping structures for thin-film solar-cell technologically compatible with large-area thin-film fabrication techniques.

  14. High Efficiency Thin Film CdTe and a-Si Based Solar Cells Final Technical Report for the Period

    E-Print Network [OSTI]

    Deng, Xunming

    High Efficiency Thin Film CdTe and a-Si Based Solar Cells Final Technical Report for the PeriodTe-based thin-film solar cells and on high efficiency a-Si-based thin-film solar cells. Phases I and II have-SiGe bottom cells. · Studied the sputter deposition of ITO films for the top electrode on a-Si cells and found

  15. Nitrogen-doped cuprous oxide as a p-type hole-transporting layer in thin-film solar cells

    E-Print Network [OSTI]

    Nitrogen-doped cuprous oxide as a p-type hole- transporting layer in thin-film solar cells Yun Seog-transparent tunnel junction to a back-contact. We fabricate Cu2O-based heterojunction thin-film solar cells-factor and power conversion efficiency of the solar cells. Cu2O:N thin-films may also be useful in other

  16. The Lunar L1 Gateway: Portal to the Stars and Beyond

    E-Print Network [OSTI]

    Ross, Shane

    1 The Lunar L1 Gateway: Portal to the Stars and Beyond Martin W. Lo Navigation and Mission Design-30, 2001 #12;2 The Lunar L1 Gateway: Portal to the Stars and Beyond Martin Lo1 , Shane Ross2 Abstract Our Solar System is interconnected by a vast system of tunnels winding around the Sun generated

  17. Maximizing Network Lifetime Via 3G Gateway Assignment in Dual-Radio Sensor Networks

    E-Print Network [OSTI]

    Liang, Weifa

    - ments, such as temperature, humidity, wind, solar radiation, etc. [3]. Sensor nodes are typically as well as in the idling cost [5]. If all sensors are gateways, they will run out of energy within a shortMaximizing Network Lifetime Via 3G Gateway Assignment in Dual-Radio Sensor Networks Xu Xu, Weifa

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

    E-Print Network [OSTI]

    Rockett, Angus

    1999-01-01

    "lms during annealing Marika Bodega rd *, Karin Granath , Lars Stolt , Angus Rockett Uppsala University Mo thin "lms used as back contacts for Cu(In,Ga)Se solar cells. The samples were analysed glass substrate into the Mo "lm. The oxygen content of the rf diode sputtered Mo "lms was 8 at% as found

  19. 22nd European Photovoltaic Solar Energy Conference, Milan, 3-7 September 2007 Cu(InGa)Se2 THIN-FILM SOLAR CELLS

    E-Print Network [OSTI]

    22nd European Photovoltaic Solar Energy Conference, Milan, 3-7 September 2007 Cu(InGa)Se2 THIN-FILM INTRODUCTION Cu(InGa)Se2-based thin-film solar cells have high conversion-efficiencies (the laboratory record

  20. Low-Cost Light Weigh Thin Film Solar Concentrators

    Broader source: Energy.gov [DOE]

    This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

  1. Thin-film flat-plate solar collectors for low-cost manufacture and installation

    SciTech Connect (OSTI)

    Andrews, J.W.; Wilhelm, W.G.

    1980-03-01

    A flat-plate solar energy collector design using thin-film plastics in both the absorber and glazing is described. The design approach proceeded in two steps. First, cost constraints on solar collectors were determined using reasonable economic projections. Second, engineering was applied only to those ideas which had hope of falling within those cost boundaries. The use of thin-film plastics appeared most attractive according to these criteria. The nature of the marketing and distribution network can be expected to have a strong impact on the final installed cost of the collector; the proposed design has characteristics which could make possible a reduced price markup.

  2. Light Trapping for Thin Silicon Solar Cells by Femtosecond Laser Texturing: Preprint

    SciTech Connect (OSTI)

    Lee, B. G.; Lin, Y. T.; Sher, M. J.; Mazur, E.; Branz, H. M.

    2012-06-01

    Femtosecond laser texturing is used to create nano- to micron-scale surface roughness that strongly enhances light-trapping in thin crystalline silicon solar cells. Light trapping is crucial for thin solar cells where a single light-pass through the absorber is insufficient to capture the weakly absorbed red and near-infrared photons, especially with an indirect-gap semiconductor absorber layer such as crystalline Si which is less than 20 um thick. We achieve enhancement of the optical absorption from light-trapping that approaches the Yablonovitch limit.

  3. HIGH EFFICIENCY CdTe/CdS THIN FILM SOLAR CELLS WITH A NOVEL BACK-CONTACT Nicola Romeoa

    E-Print Network [OSTI]

    Romeo, Alessandro

    HIGH EFFICIENCY CdTe/CdS THIN FILM SOLAR CELLS WITH A NOVEL BACK-CONTACT Nicola Romeoa , Alessio in the fabrication of high efficiency CdTe/CdS thin film solar cells. Usually, it is done first by etching the CdTe/CdS structure causing shunt paths by segregating into the grain boundaries or lowering the cell efficiency

  4. Towards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non-radiative recombinations

    E-Print Network [OSTI]

    important evaluation criterion for photovoltaic (PV) technology. Therefore, research on novel structuresTowards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping February 2014; published online 3 March 2014) Thin-film solar cells based on silicon have emerged

  5. Recent improvements in materials for thin GaAs and multibandgap solar cells

    SciTech Connect (OSTI)

    Benner, J.P.

    1985-05-01

    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.

  6. Science Gateways : Demos

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| Stanford SynchrotronVideo-Contest December 17, 2015GatewaysDemos

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

    SciTech Connect (OSTI)

    George Atanasoff

    2010-10-29

    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 AccuStrata’s 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

  8. Retrieving Properties of Thin Clouds from Solar Aureole Measurements

    E-Print Network [OSTI]

    Joss, Paul C.

    This paper describes a newly designed Sun and Aureole Measurement (SAM) aureolegraph and the first results obtained with this instrument. SAM measurements of solar aureoles produced by cirrus and cumulus clouds were taken ...

  9. Novel wide band gap materials for highly efficient thin film tandem solar cells

    SciTech Connect (OSTI)

    Brian E. Hardin, Stephen T. Connor, Craig H. Peters

    2012-06-11

    Tandem solar cells (TSCs), which use two or more materials to absorb sunlight, have achieved power conversion efficiencies of >25% versus 11-20% for commercialized single junction solar cell modules. The key to widespread commercialization of TSCs is to develop the wide-band, top solar cell that is both cheap to fabricate and has a high open-circuit voltage (i.e. >1V). Previous work in TSCs has generally focused on using expensive processing techniques with slow growth rates resulting in costs that are two orders of magnitude too expensive to be used in conventional solar cell modules. The objective of the PLANT PV proposal was to investigate the feasibility of using Ag(In,Ga)Se2 (AIGS) as the wide-bandgap absorber in the top cell of a thin film tandem solar cell (TSC). Despite being studied by very few in the solar community, AIGS solar cells have achieved one of the highest open-circuit voltages within the chalcogenide material family with a Voc of 949mV when grown with an expensive processing technique (i.e. Molecular Beam Epitaxy). PLANT PV�s goal in Phase I of the DOE SBIR was to 1) develop the chemistry to grow AIGS thin films via solution processing techniques to reduce costs and 2) fabricate new device architectures with high open-circuit voltage to produce full tandem solar cells in Phase II. PLANT PV attempted to translate solution processing chemistries that were successful in producing >12% efficient Cu(In,Ga)Se2 solar cells by replacing copper compounds with silver. The main thrust of the research was to determine if it was possible to make high quality AIGS thin films using solution processing and to fully characterize the materials properties. PLANT PV developed several different types of silver compounds in an attempt to fabricate high quality thin films from solution. We found that silver compounds that were similar to the copper based system did not result in high quality thin films. PLANT PV was able to deposit AIGS thin films using a mixture of solution and physical vapor deposition processing, but these films lacked the p-type doping levels that are required to make decent solar cells. Over the course of the project PLANT PV was able to fabricate efficient CIGS solar cells (8.7%) but could not achieve equivalent performance using AIGS. During the nine-month grant PLANT PV set up a variety of thin film characterization tools (e.g. drive-level capacitance profiling) at the Molecular Foundry, a Department of Energy User Facility, that are now available to both industrial and academic researchers via the grant process. PLANT PV was also able to develop the back end processing of thin film solar cells at Lawrence Berkeley National Labs to achieve 8.7% efficient CIGS solar cells. This processing development will be applied to other types of thin film PV cells at the Lawrence Berkeley National Labs. While PLANT PV was able to study AIGS film growth and optoelectronic properties we concluded that AIGS produced using these methods would have a limited efficiency and would not be commercially feasible. PLANT PV did not apply for the Phase II of this grant.

  10. Method and apparatus for fabricating a thin-film solar cell utilizing a hot wire chemical vapor deposition technique

    DOE Patents [OSTI]

    Wang, Qi; Iwaniczko, Eugene

    2006-10-17

    A thin-film solar cell is provided. The thin-film solar cell comprises an a-SiGe:H (1.6 eV) n-i-p solar cell having a deposition rate of at least ten (10) .ANG./second for the a-SiGe:H intrinsic layer by hot wire chemical vapor deposition. A method for fabricating a thin film solar cell is also provided. The method comprises depositing a n-i-p layer at a deposition rate of at least ten (10) .ANG./second for the a-SiGe:H intrinsic layer.

  11. Low cost and high performance light trapping structure for thin-film solar cells

    E-Print Network [OSTI]

    Wang, DongLin; Su, Gang

    2015-01-01

    Nano-scaled dielectric and metallic structures are popular light tapping structures in thin-film solar cells. However, a large parasitic absorption in those structures is unavoidable. Most schemes based on such structures also involve the textured active layers that may bring undesirable degradation of the material quality. Here we propose a novel and cheap light trapping structure based on the prism structured SiO2 for thin-film solar cells, and a flat active layer is introduced purposefully. Such a light trapping structure is imposed by the geometrical shape optimization to gain the best optical benefit. By examining our scheme, it is disclosed that the conversion efficiency of the flat a-Si:H thin-film solar cell can be promoted to exceed the currently certified highest value. As the cost of SiO2-based light trapping structure is much cheaper and easier to fabricate than other materials, this proposal would have essential impact and wide applications in thin-film solar cells.

  12. Method of forming particulate materials for thin-film solar cells

    DOE Patents [OSTI]

    Eberspacher, Chris; Pauls, Karen Lea

    2004-11-23

    A method for preparing particulate materials useful in fabricating thin-film solar cells is disclosed. Particulate materials is prepared by the method include for example materials comprising copper and indium and/or gallium in the form of single-phase, mixed-metal oxide particulates; multi-phase, mixed-metal particulates comprising a metal oxide; and multinary metal particulates.

  13. Supplementary Material Volumetric plasmonic resonator architecture for thin-film solar

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    Supplementary Material Volumetric plasmonic resonator architecture for thin-film solar cells for the top resonator and volumetric resonator architectures (Fig. S1). The results confirm that it is possible to obtain a larger enhancement in the absorptivity using the volumetric architecture. We observe

  14. Light trapping and electrical transport in thin-film solar cells with randomly rough Piotr Kowalczewski, Angelo Bozzola, Marco Liscidini, and Lucio Claudio Andreani

    E-Print Network [OSTI]

    Light trapping and electrical transport in thin-film solar cells with randomly rough textures Piotr solar cells J. Appl. Phys. 105, 094511 (2009); 10.1063/1.3108689 Local versus global absorption in thin-film in thin-film solar cells with randomly rough textures Piotr Kowalczewski,a) Angelo Bozzola, Marco

  15. Response to "Comment on `Towards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non-radiative recombinations'" [J. Appl. Phys. 117,

    E-Print Network [OSTI]

    Response to "Comment on `Towards high efficiency thin-film crystalline silicon solar cells high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non.1063/1.4905182 Towards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non

  16. Bandgap-Graded Cu2Zn(Sn1-xGex)S4 Thin-Film Solar Cells Derived from Metal Chalcogenide Complex Ligand Capped Nanocrystals

    E-Print Network [OSTI]

    Cao, Guozhong

    Bandgap-Graded Cu2Zn(Sn1-xGex)S4 Thin-Film Solar Cells Derived from Metal Chalcogenide ComplexS) thin-film solar cells based on metal chalcogenide complex (MCC) ligand capped nanocrystals (NCs attention as a promising absorber material in thin film-solar cells due to its abundance and nontoxicity

  17. DISORDER ENGINEERING FOR LIGHT-TRAPPING IN THIN-FILM SOLAR CELLS P. Kowalczewski, M. Liscidini, and L.C. Andreani

    E-Print Network [OSTI]

    DISORDER ENGINEERING FOR LIGHT-TRAPPING IN THIN-FILM SOLAR CELLS P. Kowalczewski, M. Liscidini: In this work we focus on randomly rough textures for light-trapping in thin-film silicon solar cells. We use light management is a key to achieve high efficiency thin-film solar cells, and a wide variety of light

  18. Thin-film solar cell fabricated on a flexible metallic substrate

    DOE Patents [OSTI]

    Tuttle, John R.; Noufi, Rommel; Hasoon, Falah S.

    2006-05-30

    A thin-film solar cell (10) is provided. The thin-film solar cell (10) comprises a flexible metallic substrate (12) having a first surface and a second surface. A back metal contact layer (16) is deposited on the first surface of the flexible metallic substrate (12). A semiconductor absorber layer (14) is deposited on the back metal contact. A photoactive film deposited on the semiconductor absorber layer (14) forms a heterojunction structure and a grid contact (24) deposited on the heterjunction structure. The flexible metal substrate (12) can be constructed of either aluminium or stainless steel. Furthermore, a method of constructing a solar cell is provided. The method comprises providing an aluminum substrate (12), depositing a semiconductor absorber layer (14) on the aluminum substrate (12), and insulating the aluminum substrate (12) from the semiconductor absorber layer (14) to inhibit reaction between the aluminum substrate (12) and the semiconductor absorber layer (14).

  19. Thin-Film Solar Cell Fabricated on a Flexible Metallic Substrate

    DOE Patents [OSTI]

    Tuttle, J. R.; Noufi, R.; Hasoon, F. S.

    2006-05-30

    A thin-film solar cell (10) is provided. The thin-film solar cell (10) comprises a flexible metallic substrate (12) having a first surface and a second surface. A back metal contact layer (16) is deposited on the first surface of the flexible metallic substrate (12). A semiconductor absorber layer (14) is deposited on the back metal contact. A photoactive film deposited on the semiconductor absorber layer (14) forms a heterojunction structure and a grid contact (24) deposited on the heterjunction structure. The flexible metal substrate (12) can be constructed of either aluminium or stainless steel. Furthermore, a method of constructing a solar cell is provided. The method comprises providing an aluminum substrate (12), depositing a semiconductor absorber layer (14) on the aluminum substrate (12), and insulating the aluminum substrate (12) from the semiconductor absorber layer (14) to inhibit reaction between the aluminum substrate (12) and the semiconductor absorber layer (14).

  20. Thin film solar cell configuration and fabrication method

    DOE Patents [OSTI]

    Menezes, Shalini

    2009-07-14

    A new photovoltaic device configuration based on an n-copper indium selenide absorber and a p-type window is disclosed. A fabrication method to produce this device on flexible or rigid substrates is described that reduces the number of cell components, avoids hazardous materials, simplifies the process steps and hence the costs for high volume solar cell manufacturing.

  1. Hot-Wire Deposition of Hydrogenated Nanocrystalline SiGe Films for Thin-Film Si Based Solar Cells

    E-Print Network [OSTI]

    Deng, Xunming

    Hot-Wire Deposition of Hydrogenated Nanocrystalline SiGe Films for Thin-Film Si Based Solar Cells bandgap absorber in an a-Si/a-SiGe/nc-SiGe(nc- Si) triple-junction solar cell due to its higher optical in an a-Si based multiple- junction solar cell. 1. INTRODUCTION Narrow bandgap amorphous SiGe (a

  2. THIN FILM SOLAR CELLS AND A REVIEW OF RECENT RESULTS ON GaAs By PAUL RAPPAPORT,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    154. THIN FILM SOLAR CELLS AND A REVIEW OF RECENT RESULTS ON GaAs By PAUL RAPPAPORT, RCA PHYSIQUE APPLIQUÃ?E TOME 1, SEPTEMBRE 1966, PAGE ' Two of the most urgent requirements of future solar cells are lower cost and lighter weight. Pre- sent cost of solar cells is in the s 200 to $ 400/watt range, which

  3. HAN Attack Surface and the Open Smart Energy Gateway Project

    E-Print Network [OSTI]

    Searle, Justin

    2014-01-01

    Surface  and  the  Open  Smart   Energy  Gateway  Project  Surface  and  the  Open  Smart   Energy  Gateway  Project  home.       The  Open  Smart  Energy  Gateway  (OpenSEG)  

  4. Overview and Challenges of Thin Film Solar Electric Technologies

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeeding access toOctoberConsumption (MillionOther airborneand Challenges of Thin

  5. Thin film polycrystalline silicon: Promise and problems in displays and solar cells

    SciTech Connect (OSTI)

    Fonash, S.J.

    1995-08-01

    Thin film polycrystalline Si (poly-Si) with its carrier mobilities, potentially good stability, low intragrain defect density, compatibility with silicon processing, and ease of doping activation is an interesting material for {open_quotes}macroelectronics{close_quotes} applications such as TFTs for displays and solar cells. The poly-Si films needed for these applications can be ultra-thin-in the 500{Angstrom} to 1000{Angstrom} thickness range for flat panel display TFTs and in the 4{mu}m to 10{mu}m thickness range for solar cells. Because the films needed for these microelectronics applications can be so thin, an effective approach to producing the films is that of crystallizing a-Si precursor material. Unlike cast materials, poly-Si films made this way can be produced using low temperature processing. Unlike deposited poly-Si films, these crystallized poly-Si films can have grain widths that are much larger than the film thickness and almost atomically smooth surfaces. This thin film poly-Si crystallized from a-Si precursor films, and its promise and problems for TFTs and solar cells, is the focus of this discussion.

  6. PEDOT:PSS emitters on multicrystalline silicon thin-film absorbers for hybrid solar cells

    SciTech Connect (OSTI)

    Junghanns, Marcus; Plentz, Jonathan Andrä, Gudrun; Gawlik, Annett; Höger, Ingmar; Falk, Fritz

    2015-02-23

    We fabricated an efficient hybrid solar cell by spin coating poly(3,4-ethylene-dioxythiophene):polystyrenesulfonate (PEDOT:PSS) on planar multicrystalline Si (mc-Si) thin films. The only 5??m thin Si absorber layers were prepared by diode laser crystallization of amorphous Si deposited by electron beam evaporation on glass. On these absorber layers, we studied the effect of SiO{sub x} and Al{sub 2}O{sub 3} terminated Si surfaces. The short circuit density and power conversion efficiency (PCE) of the mc-Si/Al{sub 2}O{sub 3}/PEDOT:PSS solar cell increase from 20.6 to 25.4?mA/cm{sup 2} and from 7.3% to 10.3%, respectively, as compared to the mc-Si/SiO{sub x}/PEDOT:PSS cell. Al{sub 2}O{sub 3} lowers the interface recombination and improves the adhesion of the polymer film on the hydrophobic mc-Si thin film. Open circuit voltages up to 604?mV were reached. This study demonstrates the highest PCE so far of a hybrid solar cell with a planar thin film Si absorber.

  7. Thin film cadmium telluride, zinc telluride, and mercury zinc telluride solar cells

    SciTech Connect (OSTI)

    Chu, T.L. )

    1992-04-01

    This report describes research to demonstrate (1) thin film cadmium telluride solar cells with a quantum efficiency of 75% or higher at 0. 44 {mu}m and a photovoltaic efficiency of 11.5% or greater, and (2) thin film zinc telluride and mercury zinc telluride solar cells with a transparency to sub-band-gap radiation of 65% and a photovoltaic conversion efficiency of 5% and 8%, respectively. Work was directed at (1) depositing transparent conducting semiconductor films by solution growth and metal-organic chemical vapor deposition (MOCVD) technique, (2) depositing CdTe films by close-spaced sublimation (CSS) and MOCVD techniques, (3) preparing and evaluating thin film CdTe solar cells, and (4) preparing and characterizing thin film ZnTe, CD{sub 1-x}Zn{sub 1-x}Te, and Hg{sub 1-x}Zn{sub x}Te solar cells. The deposition of CdS films from aqueous solutions was investigated in detail, and their crystallographic, optical, and electrical properties were characterized. CdTe films were deposited from DMCd and DIPTe at 400{degrees}C using TEGa and AsH{sub 3} as dopants. CdTe films deposited by CSS had significantly better microstructures than those deposited by MOCVD. Deep energy states in CdTe films deposited by CSS and MOCVD were investigated. Thin films of ZnTe, Cd{sub 1- x}Zn{sub x}Te, and Hg{sub 1-x}Zn{sub x}Te were deposited by MOCVD, and their crystallographic, optical, and electrical properties were characterized. 67 refs.

  8. Damage mechanisms in thin film solar cells during sputtering deposition of transparent conductive coatings

    SciTech Connect (OSTI)

    Fan Qihua; Liao Xianbo [Department of Physics and Astronomy, University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606 (United States); Deng, Michael [Xunlight Corporation, 3145 Nebraska Avenue, Toledo, Ohio 43607 (United States); Deng Xunming [Department of Physics and Astronomy, University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606 (United States); Xunlight Corporation, 3145 Nebraska Avenue, Toledo, Ohio 43607 (United States)

    2009-02-01

    Amorphous silicon (a-Si) based thin film solar cell grown on flexible stainless steel substrate is one of the most promising energy conversion devices in the future. This type of solar cell uses a transparent conductive oxide (TCO) film as top electrode. It has been a widely accepted opinion that the radio frequency sputtering deposition of the TCO film produces a higher yield than direct current sputtering, and the reason is not clear. Here we show that the damage to the solar cell during the sputtering process is caused by a reverse bias applied to the n-i-p junction. This reverse bias is related to the characteristics of plasma discharge. The mechanism we reveal may significantly affect the solar cell process.

  9. Low-cost, deterministic quasi-periodic photonic structures for light trapping in thin film silicon solar cells

    E-Print Network [OSTI]

    Sheng, Xing

    Light trapping has been an important issue for thin film silicon solar cells because of the low absorption coefficient in the near infrared range. In this paper, we present a photonic structure which combines anodic aluminum ...

  10. Characterization of the Electronic and Chemical Structure at the Thin Film Solar Cell Interfaces: June 2005 -- June 2009

    SciTech Connect (OSTI)

    Heske, C.

    2009-09-01

    Study using photoelectron spectroscopy, inverse photoemission, and X-ray absorption and emission to derive the electronic structure of interfaces in CIGSS and CdTe thin-film solar cells.

  11. Angular behavior of the absorption limit in thin film silicon solar cells

    E-Print Network [OSTI]

    Naqavi, Ali; Söderström, Karin; Battaglia, Corsin; Paeder, Vincent; Scharf, Toralf; Herzig, Hans Peter; Ballif, Christophe

    2013-01-01

    We investigate the angular behavior of the upper bound of absorption provided by the guided modes in thin film solar cells. We show that the 4n^2 limit can be potentially exceeded in a wide angular and wavelength range using two-dimensional periodic thin film structures. Two models are used to estimate the absorption enhancement; in the first one, we apply the periodicity condition along the thickness of the thin film structure but in the second one, we consider imperfect confinement of the wave to the device. To extract the guided modes, we use an automatized procedure which is established in this work. Through examples, we show that from the optical point of view, thin film structures have a high potential to be improved by changing their shape. Also, we discuss the nature of different optical resonances which can be potentially used to enhance light trapping in the solar cell. We investigate the two different polarization directions for one-dimensional gratings and we show that the transverse magnetic pola...

  12. Thin silicon foils produced by epoxy-induced spalling of silicon for high efficiency solar cells

    SciTech Connect (OSTI)

    Martini, R., E-mail: roberto.martini@imec.be [Department of Electrical Engineering, KU Leuven, Kasteelpark 10, 3001 Leuven (Belgium); imec, Kapeldreef 75, 3001 Leuven (Belgium); Kepa, J.; Stesmans, A. [Department of Physics, KU Leuven, Celestijnenlaan 200 D, 3001 Leuven (Belgium); Debucquoy, M.; Depauw, V.; Gonzalez, M.; Gordon, I. [imec, Kapeldreef 75, 3001 Leuven (Belgium); Poortmans, J. [Department of Electrical Engineering, KU Leuven, Kasteelpark 10, 3001 Leuven (Belgium); imec, Kapeldreef 75, 3001 Leuven (Belgium); Universiteit Hasselt, Martelarenlaan 42, B-3500 Hasselt (Belgium)

    2014-10-27

    We report on the drastic improvement of the quality of thin silicon foils produced by epoxy-induced spalling. In the past, researchers have proposed to fabricate silicon foils by spalling silicon substrates with different stress-inducing materials to manufacture thin silicon solar cells. However, the reported values of effective minority carrier lifetime of the fabricated foils remained always limited to ?100??s or below. In this work, we investigate epoxy-induced exfoliated foils by electron spin resonance to analyze the limiting factors of the minority carrier lifetime. These measurements highlight the presence of disordered dangling bonds and dislocation-like defects generated by the exfoliation process. A solution to remove these defects compatible with the process flow to fabricate solar cells is proposed. After etching off less than 1??m of material, the lifetime of the foil increases by more than a factor of 4.5, reaching a value of 461??s. This corresponds to a lower limit of the diffusion length of more than 7 times the foil thickness. Regions with different lifetime correlate well with the roughness of the crack surface which suggests that the lifetime is now limited by the quality of the passivation of rough surfaces. The reported values of the minority carrier lifetime show a potential for high efficiency (>22%) thin silicon solar cells.

  13. Final project report - CRADA with United Solar Technologies and Pacific Northwest Laboratory (PNL-021): Thin film materials for low-cost high performance solar concentrators

    SciTech Connect (OSTI)

    Martin, P.M.; Affinito, J.D.; Gross, M.E.; Bennett, W.D.

    1995-03-01

    The objectives of this project were as follows: To develop and evaluate promising low-cost dielectric and polymer-protected thin-film reflective metal coatings to be applied to preformed continuously-curved solar reflector panels to enhance their solar reflectance, and to demonstrate protected solar reflective coatings on preformed solar concentrator panels. The opportunity for this project arose from a search by United Solar Technologies (UST) for organizations and facilities capable of applying reflective coatings to large preformed panels. PNL was identified as being uniquely qualified to participate in this collaborative project.

  14. Wireless Gateway Programming Model Qadri Hamarsheh

    E-Print Network [OSTI]

    1 Wireless Gateway Programming Model Qadri Hamarsheh Department of Computer Engineering, Faculty suggests architecture for Wireless Gateway Programming Model that consists of building blocks to solve the technical and business problems of wireless environment. The paper describes various fundamental aspects

  15. Structural and chemical investigations of CBD-and PVD-CdS buffer layers and interfaces in Cu(In,Ga)Se2-based thin film solar cells

    E-Print Network [OSTI]

    Romeo, Alessandro

    (In,Ga)Se2-based thin film solar cells D. Abou-Rasa,b,*, G. Kostorza , A. Romeob,1 , D. Rudmannb , A Available online 8 December 2004 Abstract It is known that high-efficiency thin film solar cells based on Cu in efficiencies of solar cells with CBD- and PVD-CdS buffer layers can partly be explained by referring

  16. Controlling the Texture and Crystallinity of Evaporated Lead Phthalocyanine Thin Films for Near-Infrared Sensitive Solar Cells

    E-Print Network [OSTI]

    Schreiber, Frank

    Controlling the Texture and Crystallinity of Evaporated Lead Phthalocyanine Thin Films for Near-Infrared Sensitive Solar Cells Karolien Vasseur,, Katharina Broch,§ Alexander L. Ayzner, Barry P. Rand, David Cheyns: To achieve organic solar cells with a broadened spectral absorption, we aim to promote the growth of the near

  17. Cross-sectional electrostatic force microscopy of thin-film solar cells

    SciTech Connect (OSTI)

    Ballif, C.; Moutinho, H. R.; Al-Jassim, M. M.

    2001-01-15

    In a recent work, we showed that atomic force microscopy (AFM) is a powerful technique to image cross sections of polycrystalline thin films. In this work, we apply a modification of AFM, namely, electrostatic force microscopy (EFM), to investigate the electronic properties of cleaved II--VI and multijunction thin-film solar cells. We cleave the devices in such a way that they are still working with their nominal photovoltaic efficiencies and can be polarized for the measurements. This allows us to differentiate between surface effects (work function and surface band bending) and bulk device properties. In the case of polycrystalline CdTe/CdS/SnO{sub 2}/glass solar cells, we find a drop of the EFM signal in the area of the CdTe/CdS interface ({+-}50 nm). This drop varies in amplitude and sign according to the applied external bias and is compatible with an n-CdS/p-CdTe heterojunction model, thereby invalidating the possibility of a deeply buried n-p CdTe homojunction. In the case of a triple-junction GaInP/GaAs/Ge device, we observe a variation of the EFM signal linked to both the material work-function differences and to the voltage bias applied to the cell. We attempt a qualitative explanation of the results and discuss the implications and difficulties of the EFM technique for the study of such thin-film devices.

  18. Thin Single Crystal Silicon Solar Cells on Ceramic Substrates: November 2009 - November 2010

    SciTech Connect (OSTI)

    Kumar, A.; Ravi, K. V.

    2011-06-01

    In this program we have been developing a technology for fabricating thin (< 50 micrometres) single crystal silicon wafers on foreign substrates. We reverse the conventional approach of depositing or forming silicon on foreign substrates by depositing or forming thick (200 to 400 micrometres) ceramic materials on high quality single crystal silicon films ~ 50 micrometres thick. Our key innovation is the fabrication of thin, refractory, and self-adhering 'handling layers or substrates' on thin epitaxial silicon films in-situ, from powder precursors obtained from low cost raw materials. This 'handling layer' has sufficient strength for device and module processing and fabrication. Successful production of full sized (125 mm X 125 mm) silicon on ceramic wafers with 50 micrometre thick single crystal silicon has been achieved and device process flow developed for solar cell fabrication. Impurity transfer from the ceramic to the silicon during the elevated temperature consolidation process has resulted in very low minority carrier lifetimes and resulting low cell efficiencies. Detailed analysis of minority carrier lifetime, metals analysis and device characterization have been done. A full sized solar cell efficiency of 8% has been demonstrated.

  19. Edge sharpness Dependence of MNP in plasmonic solar cell In this article we show that in a a-Si ultra thin plsmonic solar cell with silver nano-particle, the

    E-Print Network [OSTI]

    Park, Namkyoo

    , and M. L. Brongersma, Design of Plasmonic Thin-Film Solar Cells with Broadband Absorption Enhancements that in a a-Si ultra thin plsmonic solar cell with silver nano-particle, the absorption of the light can Edge sharpness Dependence of MNP in plasmonic solar cell *, , In this article we show

  20. Radiation damage of GaAs thin-film solar cells on Si substrates

    SciTech Connect (OSTI)

    Itoh, Y.; Yamaguchi, M.; Nishioka, T.; Yamamoto, A.

    1987-01-15

    1-MeV electron irradiation damages in GaAs thin-film solar cells on Si substrates are examined for the first time. Damage constant for minority-carrier diffusion length in GaAs heteroepitaxial films on Si substrates is found to be the same as that in GaAs homoepitaxial films on GaAs substrates. This agreement suggests that GaAs/Si has the same defect introduction rate with radiation as GaAs/GaAs. The degradation of GaAs solar cells on Si with electron irradiation is less than that of GaAs solar cells on GaAs, because in the present, GaAs films on Si substrates have lower minority-carrier diffusion length compared to GaAs films on GaAs and these films are insensitive to radiation. The p/sup +/-p/sup +/-n AlGaAs-GaAs heteroface solar cell with junction depth of about 0.3 ..mu..m is concluded to be useful for a high-efficiency and radiation-resistant solar cell fabricated on a Si substrate.

  1. Performance and Loss Analyses of High-Efficiency CBD-ZnS/Cu(In1-xGax)Se2 Thin-Film Solar Cells

    E-Print Network [OSTI]

    Sites, James R.

    1 Performance and Loss Analyses of High-Efficiency CBD-ZnS/Cu(In1-xGax)Se2 Thin-Film Solar Cells, Setagaya-ku, Tokyo 157-8572, Japan (Received ) KEYWORDS: ZnS buffer, Cu(In,Ga)Se2, thin-film solar cells alternative to CdS in polycrystalline thin-film Cu(In1-xGax)Se2 (CIGS) solar cells. Cells with efficiency

  2. Investigation of porous alumina as a self-assembled diffractive element to facilitate light trapping in thin film silicon solar cells

    E-Print Network [OSTI]

    Coronel, Naomi (Naomi Cristina)

    2009-01-01

    Thin film solar cells are currently being investigated as an affordable alternative energy source because of the reduced material cost. However, these devices suffer from low efficiencies, compared to silicon wafer solar ...

  3. A non-resonant dielectric metamaterial for enhancement of thin-film solar cells

    E-Print Network [OSTI]

    Omelyanovich, Mikhail; Simovski, Constantin

    2014-01-01

    Recently, we have suggested dielectric metamaterial composed as an array of submicron dielectric spheres located on top of an amorphous thin-film solar cell. We have theoretically shown that this metamaterial can decrease the reflection and simultaneously can suppress the transmission through the photovoltaic layer because it transforms the incident plane wave into a set of focused light beams. This theoretical concept has been strongly developed and experimentally confirmed in the present paper. Here we consider the metamaterial for oblique angle illumination, redesign the solar cell and present a detailed experimental study of the whole structure. In contrast to our precedent theoretical study we show that our omnidirectional light-trapping structure may operate better than the optimized flat coating obtained by plasma-enhanced chemical vapor deposition.

  4. High Efficiency, Low Cost Solar Cells Manufactured Using 'Silicon Ink' on Thin Crystalline Silicon Wafers

    SciTech Connect (OSTI)

    Antoniadis, H.

    2011-03-01

    Reported are the development and demonstration of a 17% efficient 25mm x 25mm crystalline Silicon solar cell and a 16% efficient 125mm x 125mm crystalline Silicon solar cell, both produced by Ink-jet printing Silicon Ink on a thin crystalline Silicon wafer. To achieve these objectives, processing approaches were developed to print the Silicon Ink in a predetermined pattern to form a high efficiency selective emitter, remove the solvents in the Silicon Ink and fuse the deposited particle Silicon films. Additionally, standard solar cell manufacturing equipment with slightly modified processes were used to complete the fabrication of the Silicon Ink high efficiency solar cells. Also reported are the development and demonstration of a 18.5% efficient 125mm x 125mm monocrystalline Silicon cell, and a 17% efficient 125mm x 125mm multicrystalline Silicon cell, by utilizing high throughput Ink-jet and screen printing technologies. To achieve these objectives, Innovalight developed new high throughput processing tools to print and fuse both p and n type particle Silicon Inks in a predetermined pat-tern applied either on the front or the back of the cell. Additionally, a customized Ink-jet and screen printing systems, coupled with customized substrate handling solution, customized printing algorithms, and a customized ink drying process, in combination with a purchased turn-key line, were used to complete the high efficiency solar cells. This development work delivered a process capable of high volume producing 18.5% efficient crystalline Silicon solar cells and enabled the Innovalight to commercialize its technology by the summer of 2010.

  5. Your GatewaY

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAboutXu Named| Princeton Plasma Physics LabYour

  6. Plasmonic light trapping in thin-film Si solar cells This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-Print Network [OSTI]

    Polman, Albert

    devices, semiconductors containing scarce elements such as CdTe and CuInGaSe2 have entered the marketPlasmonic light trapping in thin-film Si solar cells This article has been downloaded from Plasmonic light trapping in thin-film Si solar cells P Spinelli1 , V E Ferry2 , J van de Groep1 , M van Lare

  7. QUANTIFICATION OF LOSSES IN THIN-FILM CdS/CdTe SOLAR CELLS S.H. Demtsu and J.R. Sites

    E-Print Network [OSTI]

    Sites, James R.

    QUANTIFICATION OF LOSSES IN THIN-FILM CdS/CdTe SOLAR CELLS S.H. Demtsu and J.R. Sites Department of Physics, Colorado State University, Fort Collins, CO 80523, USA ABSTRACT Quantification of solar cell Thin-film CdS/CdTe devices have been studied extensively, but some basic underlying properties

  8. Light trapping in thin-film solar cells measured by Raman spectroscopy

    SciTech Connect (OSTI)

    Ledinský, M., E-mail: ledinsky@fzu.cz [Laboratory of Nanostructures and Nanomaterials, Institute of Physics, Academy of Sciences of the Czech Republic, v. v. i., Cukrovarnická 10, 162 00 Prague (Czech Republic); Photovoltaics and Thin Film Electronics Laboratory, Institute of Microengineering (IMT), École Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b, CH-2000 Neuchâtel (Switzerland); Moulin, E.; Bugnon, G.; Meillaud, F.; Ballif, C. [Photovoltaics and Thin Film Electronics Laboratory, Institute of Microengineering (IMT), École Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b, CH-2000 Neuchâtel (Switzerland); Ganzerová, K.; Vetushka, A.; Fejfar, A. [Laboratory of Nanostructures and Nanomaterials, Institute of Physics, Academy of Sciences of the Czech Republic, v. v. i., Cukrovarnická 10, 162 00 Prague (Czech Republic)

    2014-09-15

    In this study, Raman spectroscopy is used as a tool to determine the light-trapping capability of textured ZnO front electrodes implemented in microcrystalline silicon (?c-Si:H) solar cells. Microcrystalline silicon films deposited on superstrates of various roughnesses are characterized by Raman micro-spectroscopy at excitation wavelengths of 442?nm, 514?nm, 633?nm, and 785?nm, respectively. The way to measure quantitatively and with a high level of reproducibility the Raman intensity is described in details. By varying the superstrate texture and with it the light trapping in the ?c-Si:H absorber layer, we find significant differences in the absolute Raman intensity measured in the near infrared wavelength region (where light trapping is relevant). A good agreement between the absolute Raman intensity and the external quantum efficiency of the ?c-Si:H solar cells is obtained, demonstrating the validity of the introduced method. Applications to thin-film solar cells, in general, and other optoelectronic devices are discussed.

  9. Universality of Non-Ohmic Shunt Leakage in Thin-Film Solar Cells

    SciTech Connect (OSTI)

    Dongaonkar, S.; Servaites, J. D.; Ford, G. M.; Loser, Stephen; Moore, J.; Gelfand, R. M.; Mohseni, H. W.; Agrawal, R.; Ratner, Mark A.; Marks, Tobin J.; Lundstrom, M. S.; Alam, M. A.

    2010-01-01

    We compare the dark current-voltage (IV) characteristics of three different thin-film solar cell types: hydrogenated amorphous silicon (a-Si:H) p-i-n cells, organic bulk heterojunction (BHJ) cells, and Cu(In,Ga)Se{sub 2} (CIGS) cells. All three device types exhibit a significant shunt leakage current at low forward bias (Vsolar cell diode model. This parasitic shunt current exhibits non-Ohmic behavior, as opposed to the traditional constant shunt resistance model for photovoltaics. We show here that this shunt leakage (I{sub sh} ) , across all three solar cell types considered, is characterized by the following common phenomenological features: (a) voltage symmetry about V=0 , (b) nonlinear (power law) voltage dependence, and (c) extremely weak temperature dependence. Based on this analysis, we provide a simple method of subtracting this shunt current component from the measured data and discuss its implications on dark IV parameter extraction. We propose a space charge limited (SCL) current model for capturing all these features of the shunt leakage in a consistent framework and discuss possible physical origin of the parasitic paths responsible for this shunt current mechanism.

  10. Graphene 'gateway' discovery opens possibilities for improved...

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

    Dawn Levy Communications 865.576.6448 Graphene 'gateway' discovery opens possibilities for improved energy technologies Computer simulations show a single proton (pink) can cross...

  11. T-566: Citrix Secure Gateway Unspecified Vulnerability

    Broader source: Energy.gov [DOE]

    A vulnerability has been reported in Citrix Secure Gateway, which can be exploited by malicious people to compromise a vulnerable system.

  12. The Smithsonian American Art Museum GATEWAY Demonstration

    Broader source: Energy.gov [DOE]

    View the video about using LEDs in a GATEWAY demonstration at the Smithsonian American Art Museum in Washington, DC, including an interview with lighting designer Scott Rosenfeld.

  13. Structural and chemical investigations of CBD-and PVD-CdS buffer layers and interfaces in Cu(In,Ga)Se2-based thin film solar cells

    E-Print Network [OSTI]

    Romeo, Alessandro

    (In,Ga)Se2-based thin film solar cells D. Abou-Rasa,b,*, G. Kostorza , A. Romeob,1 , D. Rudmannb , A.N. Tiwarib,2 a ETH Zu¨rich, Institute of Applied Physics, 8093 Zu¨rich, Switzerland b ETH Zu¨rich, Thin Film Available online 8 December 2004 Abstract It is known that high-efficiency thin film solar cells based on Cu

  14. Global Science Gateway Agreement Signed in London | Department...

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

    Global Science Gateway Agreement Signed in London Global Science Gateway Agreement Signed in London January 22, 2006 - 10:15am Addthis DOE Partners With British Library on...

  15. Spin Coated Plasmonic Nanoparticle Interfaces for Photocurrent Enhancement in Thin Film Si Solar Cells

    E-Print Network [OSTI]

    Israelowitz, Miriam; Cong, Tao; Sureshkumar, Radhakrishna

    2013-01-01

    Nanoparticle (NP) arrays of noble metals strongly absorb light in the visible to infrared wavelengths through resonant interactions between the incident electromagnetic field and the metal's free electron plasma. Such plasmonic interfaces enhance light absorption and photocurrent in solar cells. We report a cost effective and scalable room temperature/pressure spin-coating route to fabricate broadband plasmonic interfaces consisting of silver NPs. The NP interface yields photocurrent enhancement (PE) in thin film silicon devices by up to 200% which is significantly greater than previously reported values. For coatings produced from Ag nanoink containing particles with average diameter of 40 nm, an optimal NP surface coverage of 7% was observed. Scanning electron microscopy of interface morphologies revealed that for low surface coverage, particles are well-separated, resulting in broadband PE. At higher surface coverage, formation of particle strings and clusters caused red-shifting of the PE peak and a narro...

  16. DEVELOPMENT OF A NOVEL PRECURSOR FOR THE PREPARATION BY SELENIZATION OF HIGH EFFICIENCY CuInGaSe2/CdS THIN FILM SOLAR CELLS

    E-Print Network [OSTI]

    Romeo, Alessandro

    /CdS THIN FILM SOLAR CELLS N. Romeo1 , A. Bosio1 , V. Canevari2 , R. Tedeschi1 , S. Sivelli1 , A. Solar cells prepared by depositing in sequence on top of the CuInGaSe2 film 60 nm of CdS, 100 nm of pure(InGa)Se2, Thin Films, Selenization 1 INTRODUCTION CuInGaSe2 based solar cells exhibit the highest

  17. Methods for forming thin-film heterojunction solar cells from I-III-VI.sub. 2

    DOE Patents [OSTI]

    Mickelsen, Reid A. (Bellevue, WA) [Bellevue, WA; Chen, Wen S. (Seattle, WA) [Seattle, WA

    1985-08-13

    An improved thin-film, large area solar cell, and methods for forming the same, having a relatively high light-to-electrical energy conversion efficiency and characterized in that the cell comprises a p-n type heterojunction formed of: (i) a first semiconductor layer comprising a photovoltaic active material selected from the class of I-III-VI.sub.2 chalcopyrite ternary materials which is vacuum deposited in a thin "composition-graded" layer ranging from on the order ot about 2.5 microns to about 5.0 microns (.congruent.2.5 .mu.m to .congruent.5.0 .mu.m) and wherein the lower region of the photovoltaic active material preferably comprises a low resistivity region of p-type semiconductor material having a superimposed region of relatively high resistivity, transient n-type semiconductor material defining a transient p-n homojunction; and (ii), a second semiconductor layer comprising a low resistivity n-type semiconductor material; wherein interdiffusion (a) between the elemental constituents of the two discrete juxtaposed regions of the first semiconductor layer defining a transient p-n homojunction layer, and (b) between the transient n-type material in the first semiconductor layer and the second n-type semiconductor layer, causes the The Government has rights in this invention pursuant to Contract No. EG-77-C-01-4042, Subcontract No. XJ-9-8021-1 awarded by the U.S. Department of Energy.

  18. Methods for forming thin-film heterojunction solar cells from I-III-VI[sub 2

    DOE Patents [OSTI]

    Mickelsen, R.A.; Chen, W.S.

    1982-06-15

    An improved thin-film, large area solar cell, and methods for forming the same are disclosed, having a relatively high light-to-electrical energy conversion efficiency and characterized in that the cell comprises a p-n type heterojunction formed of: (1) a first semiconductor layer comprising a photovoltaic active material selected from the class of I-III-VI[sub 2] chalcopyrite ternary materials which is vacuum deposited in a thin composition-graded'' layer ranging from on the order of about 2.5 microns to about 5.0 microns ([approx equal]2.5[mu]m to [approx equal]5.0[mu]m) and wherein the lower region of the photovoltaic active material preferably comprises a low resistivity region of p-type semiconductor material having a superimposed region of relatively high resistivity, transient n-type semiconductor material defining a transient p-n homojunction; and (2), a second semiconductor layer comprising a low resistivity n-type semiconductor material; wherein interdiffusion (a) between the elemental constituents of the two discrete juxtaposed regions of the first semiconductor layer defining a transient p-n homojunction layer, and (b) between the transient n-type material in the first semiconductor layer and the second n-type semiconductor layer, is allowed.

  19. Methods for forming thin-film heterojunction solar cells from I-III-VI.sub. 2

    DOE Patents [OSTI]

    Mickelsen, Reid A. (Bellevue, WA); Chen, Wen S. (Seattle, WA)

    1982-01-01

    An improved thin-film, large area solar cell, and methods for forming the same, having a relatively high light-to-electrical energy conversion efficiency and characterized in that the cell comprises a p-n type heterojunction formed of: (i) a first semiconductor layer comprising a photovoltaic active material selected from the class of I-III-VI.sub.2 chalcopyrite ternary materials which is vacuum deposited in a thin "composition-graded" layer ranging from on the order of about 2.5 microns to about 5.0 microns (.congruent.2.5.mu.m to .congruent.5.0.mu.m) and wherein the lower region of the photovoltaic active material preferably comprises a low resistivity region of p-type semiconductor material having a superimposed region of relatively high resistivity, transient n-type semiconductor material defining a transient p-n homojunction; and (ii), a second semiconductor layer comprising a low resistivity n-type semiconductor material; wherein interdiffusion (a) between the elemental constituents of the two discrete juxtaposed regions of the first semiconductor layer defining a transient p-n homojunction layer, and (b) between the transient n-type material in the first semiconductor layer and the second n-type semiconductor layer, causes the transient n-type material in The Government has rights in this invention pursuant to Contract No. EG-77-C-01-4042, Subcontract No. XJ-9-8021-1 awarded by the U.S. Department of Energy.

  20. Methods for forming thin-film heterojunction solar cells from I-III-VI{sub 2}

    DOE Patents [OSTI]

    Mickelsen, R.A.; Chen, W.S.

    1985-08-13

    An improved thin-film, large area solar cell, and methods for forming the same are disclosed, having a relatively high light-to-electrical energy conversion efficiency and characterized in that the cell comprises a p-n type heterojunction formed of: (i) a first semiconductor layer comprising a photovoltaic active material selected from the class of I-III-VI{sub 2} chalcopyrite ternary materials which is vacuum deposited in a thin ``composition-graded`` layer ranging from on the order of about 2.5 microns to about 5.0 microns ({approx_equal}2.5 {mu}m to {approx_equal}5.0 {mu}m) and wherein the lower region of the photovoltaic active material preferably comprises a low resistivity region of p-type semiconductor material having a superimposed region of relatively high resistivity, transient n-type semiconductor material defining a transient p-n homojunction; and (ii) a second semiconductor layer comprising a low resistivity n-type semiconductor material; wherein interdiffusion occurs (a) between the elemental constituents of the two discrete juxtaposed regions of the first semiconductor layer defining a transient p-n homojunction layer, and (b) between the transient n-type material in the first semiconductor layer and the second n-type semiconductor layer. 16 figs.

  1. Copper and Transparent-Conductor Reflectarray Elements on Thin-Film Solar Cell Panels

    E-Print Network [OSTI]

    Dreyer, Philippe; Nicolay, Sylvain; Ballif, Christophe; Perruisseau-Carrier, Julien

    2013-01-01

    This work addresses the integration of reflectarray antennas (RA) on thin film Solar Cell (SC) panels, as a mean to save real estate, weight, or cost in platforms such as satellites or transportable autonomous antenna systems. Our goal is to design a good RA unit cell in terms of phase response and bandwidth, while simultaneously achieving high optical transparency and low microwave loss, to preserve good SC and RA energy efficiencies, respectively. Since there is a trade-off between the optical transparency and microwave surface conductivity of a conductor, here both standard copper and transparent conductors are considered. The results obtained at the unit cell level demonstrates the feasibility of integrating RA on a thin-film SC, preserving for the first time good performance in terms of both SC and RA efficiency. For instance, measurement at X-band demonstrate families of cells providing a phase range larger than 270{\\deg} with average microwave loss of -2.45dB (resp. -0.25dB) and average optical transpa...

  2. EAST CAMPUS / MIT GATEWAY Alternative Approaches

    E-Print Network [OSTI]

    Reif, Rafael

    EAST CAMPUS / MIT GATEWAY Alternative Approaches Prepared by The Design Committee July 19. 2013 #12;East Campus / MIT Gateway - Alternative Approaches 1 This report lays out strategic options for design space on the campus south of Main Street. The report examines alternative approaches to achieving

  3. Development of Commercial Technology for Thin Film Silicon Solar Cells on Glass: Cooperative Research and Development Final Report, CRADA Number CRD-07-209

    SciTech Connect (OSTI)

    Sopori, B.

    2013-03-01

    NREL has conducted basic research relating to high efficiency, low cost, thin film silicon solar cell design and the method of making solar cells. Two patents have been issued to NREL in the above field. In addition, specific process and metrology tools have been developed by NREL. Applied Optical Sciences Corp. (AOS) has expertise in the manufacture of solar cells and has developed its own unique concentrator technology. AOS wants to complement its solar cell expertise and its concentrator technology by manufacturing flat panel thin film silicon solar cell panels. AOS wants to take NREL's research to the next level, using it to develop commercially viable flat pane, thin film silicon solar cell panels. Such a development in equipment, process, and metrology will likely produce the lowest cost solar cell technology for both commercial and residential use. NREL's fundamental research capability and AOS's technology and industrial background are complementary to achieve this product development.

  4. Creating CZTS Thin Films Via Stacked Metallic CVD and Sulfurization

    E-Print Network [OSTI]

    Bielecki, Anthony

    2013-01-01

    Katagiri, Cu2ZnSnS4 thin film solar cells, Thin Solid FilmsIndium Galenide Films Thin-film solar cells are created bycandidate for thin- film solar cells. CIGS solar cell

  5. New strategy to promote conversion efficiency using high-index nanostructures in thin-film solar cells

    E-Print Network [OSTI]

    Wang, DongLin

    2014-01-01

    Nano-scaled metallic or dielectric structures may provide various ways to trap light into thin-film solar cells for improving the conversion efficiency. In most schemes, the textured active layers are involved into light trapping structures that can provide perfect optical benefits but also bring undesirable degradation of electrical performance. Here we propose a novel approach to design high-performance thin-film solar cells. In our strategy, a flat active layer is adopted for avoiding electrical degradation, and an optimization algorithm is applied to seek for an optimized light trapping structure for the best optical benefit. As an example, we show that the efficiency of a flat a-Si:H thin-film solar cell can be promoted close to the certified highest value. It is also pointed out that, by choosing appropriate dielectric materials with high refractive index (>3) and high transmissivity in wavelength region of 350nm-800nm, the conversion efficiency of solar cells can be further enhanced.

  6. Creating CZTS Thin Films Via Stacked Metallic CVD and Sulfurization

    E-Print Network [OSTI]

    Bielecki, Anthony

    2013-01-01

    kesterite solar cell, Solar Energy Materials & Solar Cellsprecursor thin lms, Solar Energy Materials & Solar Cells [such as solar cells) due to lower material, energy, and

  7. Thin-film silicon triple-junction solar cell with 12.5% stable efficiency on innovative flat light-scattering substrate

    E-Print Network [OSTI]

    Psaltis, Demetri

    Thin-film silicon triple-junction solar cell with 12.5% stable efficiency on innovative flat light://jap.aip.org/about/rights_and_permissions #12;Thin-film silicon triple-junction solar cell with 12.5% stable efficiency on innovative flat light developed substrate that decouples the growth and scattering interfaces are investigated in n-i-p triple-junction

  8. SSL GATEWAY UNIVERSITY OF FLORIDA DANCE SHOWCASE

    Broader source: Energy.gov [DOE]

    View the video showing side-by-side dance performances with halogen and LED sidelighting as part of the Solid-State Lighting GATEWAY demonstration at the University of Florida.

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

    E-Print Network [OSTI]

    Chung, Choong-Heui

    2012-01-01

    of a CIGS film of 19.9% efficiency solar cells taken fromCIGS grains of 19.9% efficiency solar cells [5] and currentof a CIGS film of 19.9% efficiency solar cells taken from

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

    E-Print Network [OSTI]

    Chung, Choong-Heui

    2012-01-01

    cm 2 ) efficiency CIGS solar cells taken from reference [and 20.3% efficiency CIGS solar cells [6] through the use ofcm 2 ) efficiency CIGS solar cells taken from reference [6].

  11. DEVELOPMENT OF A NOVEL PRECURSOR FOR THE PREPARATION BY SELENIZATION OF HIGH EFFICIENCY CuInGaSe2/CdS THIN FILM SOLAR CELLS

    E-Print Network [OSTI]

    Romeo, Alessandro

    /CdS THIN FILM SOLAR CELLS N. Romeo1 , A. Bosio1 , V. Canevari2 , R. Tedeschi1 , S. Sivelli1 , A, Italy 3 Scientific and Technological Department, University of Verona, Italy 4 ETH Zürich Thin Films@phys.ethz.ch ABSTRACT: A novel precursor suitable to prepare uniform CuInGaSe2 thin films on an 1 inch2 area has been

  12. Local Charge Neutrality Condition, Fermi Level, and Carrier Compensation of CdTe Polycrystalline Thin Film in CdS/CdTe Solar Cells

    E-Print Network [OSTI]

    Thin Film in CdS/CdTe Solar Cells Ken K. Chin1 and Su-Huai Wei 2 1 Department of Physics and Apollo Cd vacancies VCd (o/-) and VCd (-/2-) in CdTe thin film), the general formulation of charge neutrality-level and multi-configuration intrinsic/impurity defect states for understanding the performance of CdTe thin film

  13. Light trapping and electrical transport in thin-film solar cells with randomly rough textures

    E-Print Network [OSTI]

    Yet, the central problem of thin-film photovoltaics is to capture and absorb sunlight in a thin active for photovoltaic applica- tions as intrinsically broadband scatterers. In this work, we use rigorous electro

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

    E-Print Network [OSTI]

    Chung, Choong-Heui

    2012-01-01

    and for emerging flexible electronics. Calculations predictto flexible solar cells, displays, and other electronics

  15. Technology Development for High-Efficiency Solar Cells and Modules Using Thin (<80 um) Single-Crystal Silicon Wafers Produced by Epitaxy: June 11, 2011 - April 30, 2013

    SciTech Connect (OSTI)

    Ravi, T. S.

    2013-05-01

    Final technical progress report of Crystal Solar subcontract NEU-31-40054-01. The objective of this 18-month program was to demonstrate the viability of high-efficiency thin (less than 80 um) monocrystalline silicon (Si) solar cells and modules with a low-cost epitaxial growth process.

  16. CuIn1-xGaxS2 thin film solar cells with ZnxCd1-xS as heterojunction partner Bhaskar Kumar

    E-Print Network [OSTI]

    Sites, James R.

    CuIn1-xGaxS2 thin film solar cells with ZnxCd1-xS as heterojunction partner Bhaskar Kumar 1 , Parag 80523 ABSTRACT Copper indium gallium sulfide, CuIn1-xGaxS2 (CIGS2) solar cells prepared with chemical/heterojunction partner/ ZnO/Cr/Ag contact fingers solar cells of area ~0.44 cm 2 were fabricated at FSEC

  17. High-efficiency, thin-film solar cells. Annual subcontractor report, 1 July 1991--30 June 1992

    SciTech Connect (OSTI)

    Gale, R.P.

    1994-01-01

    This report describes work on a 3-year research program to investigate thin-film GaAs/GaInP cells using the cleavage of lateral epitaxial film for transfer (CLEFT) technique, and to determine the process to enable overgrowth of GaAs films using organometallic chemistry. Application of the CLEFT thin-film technique to GaInP/GaAs solar cells and organometallic overgrowth was investigated. A problem of alloy contamination was identified and controlled, leading to higher quality layers. Solar cell structures were grown and fabricated using previously determined growth parameters for GaAs and GaInP. With the improved materials developed significant improvements were made in solar cell performance. Conditions for in-situ overgrowth by organometallic chemical vapor deposition (OMCVD) were determined and continuous GaAs layers were grown over a separation mask layer. The layers were successfully separated from their substrate using the CLEFT process, demonstrating the application of overgrowth using OM chemistry with HCl.

  18. Solid State Lighting: GATEWAY and CALiPER

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

    National Laboratory Marc.Ledbetter@pnnl.gov 503.417.7557 April 3, 2013 Solid State Lighting: GATEWAY & CALiPER Solid State Lighting: GATEWAY & CALiPER 2 | Building Technologies...

  19. Novel R2R Manufacturable Photonic-Enhanced Thin Film Solar Cells; January 28, 2010 -- January 31, 2011

    SciTech Connect (OSTI)

    Slafer, D.; Dalal, V.

    2012-03-01

    Final subcontract report for PV Incubator project 'Novel R2R Manufacturable Photonic-Enhanced Thin Film Solar Cells.' The goal of this program was to produce tandem Si cells using photonic bandgap enhancement technology developed at ISU and Lightwave Power that would have an NREL-verified efficiency of 7.5% on 0.25 cm{sup 2} area tandem junction cell on plastic substrates. This goal was met and exceeded within the timeframe and budget of the program. On smaller area cells, the efficiency was even higher, {approx}9.5% (not verified by NREL). Appropriate polymers were developed to fabricate photonic and plasmonic devices on stainless steel, Kapton and PEN substrates. A novel photonic-plasmon structure was developed which shows a promise of improving light absorption in thin film cells, a better light absorption than by any other scheme.

  20. innovati nNREL Produces Highly Efficient, Wide-Bandgap, Thin-Film Solar Cells

    E-Print Network [OSTI]

    CIGS solar cells. Their use of the high-temperature glass, designed by SCHOTT AG, allows higher fabrication temperatures, opening the door to new CIGS solar cells employing light-absorbing materials are plentiful. In contrast, CIGS solar cells with wide bandgaps can function at higher efficiencies regardless

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

    E-Print Network [OSTI]

    Romeo, Alessandro

    to the solar panel that can be adapted to any kind of shape and is easy to deploy in space. We have developed ~12% efficiency (AM1.5) CdTe solar cells on glass substrates with a vacuum deposition process [3 in the "superstrate" or "substrate" configuration (see figure 1). High efficiency CdTe solar cells are generally grown

  2. Text-Alternative Version: Smithsonian GATEWAY Demonstration Video

    Broader source: Energy.gov [DOE]

    Following is a text version of a video about the GATEWAY demonstration project at the Smithsonian American Art Museum.

  3. Simulation of nanostructure-based and ultra-thin film solar cell devices beyond the classical picture

    E-Print Network [OSTI]

    Aeberhard, Urs

    2014-01-01

    In this paper, an optoelectronic device simulation framework valid for arbitrary spatial variation of electronic potentials and optical modes, and for transport regimes ranging from ballistic to diffusive, is used to study non-local photon absorption, photocurrent generation and carrier extraction in ultra-thin film and nanostructure-based solar cell devices at the radiative limit. Among the effects that are revealed by the microscopic approach and which are inaccessible to macroscopic models is the impact of structure, doping or bias induced nanoscale potential variations on the local photogeneration rate and the photocarrier transport regime.

  4. NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL

    E-Print Network [OSTI]

    Phuyal, Dibya

    2012-01-01

    there is a great deal of interest in thin-film solar cells.Thin-film solar cells are made from a variety oflimitation in all thin-film solar cell technologies is that

  5. Ultra-thin GaAs single-junction solar cells integrated with a reflective back scattering layer

    SciTech Connect (OSTI)

    Yang, Weiquan; Becker, Jacob; Liu, Shi; Kuo, Ying-Shen; Li, Jing-Jing; Zhang, Yong-Hang; Landini, Barbara; Campman, Ken

    2014-05-28

    This paper reports the proposal, design, and demonstration of ultra-thin GaAs single-junction solar cells integrated with a reflective back scattering layer to optimize light management and minimize non-radiative recombination. According to our recently developed semi-analytical model, this design offers one of the highest potential achievable efficiencies for GaAs solar cells possessing typical non-radiative recombination rates found among commercially available III-V arsenide and phosphide materials. The structure of the demonstrated solar cells consists of an In{sub 0.49}Ga{sub 0.51}P/GaAs/In{sub 0.49}Ga{sub 0.51}P double-heterostructure PN junction with an ultra-thin 300?nm thick GaAs absorber, combined with a 5??m thick Al{sub 0.52}In{sub 0.48}P layer with a textured as-grown surface coated with Au used as a reflective back scattering layer. The final devices were fabricated using a substrate-removal and flip-chip bonding process. Solar cells with a top metal contact coverage of 9.7%, and a MgF{sub 2}/ZnS anti-reflective coating demonstrated open-circuit voltages (V{sub oc}) up to 1.00?V, short-circuit current densities (J{sub sc}) up to 24.5?mA/cm{sup 2}, and power conversion efficiencies up to 19.1%; demonstrating the feasibility of this design approach. If a commonly used 2% metal grid coverage is assumed, the anticipated J{sub sc} and conversion efficiency of these devices are expected to reach 26.6?mA/cm{sup 2} and 20.7%, respectively.

  6. Optimization-based design of surface textures for thin-film Si solar cells

    E-Print Network [OSTI]

    Sheng, Xing

    We numerically investigate the light-absorption behavior of thin-film silicon for normal-incident light, using surface textures to enhance absorption. We consider a variety of texture designs, such as simple periodic ...

  7. Accounting for Localized Defects in the Optoelectronic Design of Thin-Film Solar Cells

    E-Print Network [OSTI]

    Deceglie, Michael G.

    2014-01-01

    Accounting for Localized Defects in the OptoelectronicH solar cells. Explicitly accounting for local variations inthe importance of accounting for defect geometry, and that

  8. TiO2 Nanotubes with a ZnO Thin Energy Barrier for Improved Current Efficiency of CdSe Quantum-Dot-Sensitized Solar Cells

    SciTech Connect (OSTI)

    Lee, W.; Kang, S. H.; Kim, J. Y.; Kolekar, G. B.; Sung, Y. E.; Han, S. H.

    2009-01-01

    This paper reports the formation of a thin ZnO energy barrier between a CdSe quantum dot (Q dots) sensitizer and TiO{sub 2} nanotubes (TONTs) for improved current efficiency of Q dot-sensitized solar cells. The formation of a ZnO barrier between TONTs and the Q dot sensitizer increased the short-circuit current under illumination and also reduced the dark current in a dark environment. The power conversion efficiency of Q dot-sensitized TONT solar cells increased by 25.9% in the presence of the ZnO thin layer due to improved charge-collecting efficiency and reduced recombination.

  9. Three-junction solar cells comprised of a thin-film GaInP/GaAs tandem cell mechanically stacked on a Si cell

    SciTech Connect (OSTI)

    Yazawa, Y.; Tamura, K.; Watahiki, S.; Kitatani, T.; Ohtsuka, H.; Warabisako, T.

    1997-12-31

    Three-junction tandem solar cells were fabricated by mechanical stacking of a thin-film GaInP/GaAs monolithic tandem cell and a Si cell. The epitaxial lift-off (ELO) technique was used for the thinning of GaInP/GaAs tandem cells. Both spectral responses of the GaInP top cell and the GaAs middle cell in the thin-film GaInP/GaAs monolithic tandem cell were conserved. The Si cell performance has been improved by reducing the absorption loss in the GaAs substrate.

  10. Core/Shell heterojunction nanowire solar cell fabricated by lithographically patterned nanowire electrodeposition method

    E-Print Network [OSTI]

    Ghosh, Somnath

    2012-01-01

    thin-film solar cellsthin film technology. Thin film solar cells use an averagethinner than the c-Si. Thin film solar cell can be deposited

  11. Towards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non-radiative recombinations

    SciTech Connect (OSTI)

    Bozzola, A. Kowalczewski, P.; Andreani, L. C.

    2014-03-07

    Thin-film solar cells based on silicon have emerged as an alternative to standard thick wafers technology, but they are less efficient, because of incomplete absorption of sunlight, and non-radiative recombinations. In this paper, we focus on the case of crystalline silicon (c-Si) devices, and we present a full analytic electro-optical model for p-n junction solar cells with Lambertian light trapping. This model is validated against numerical solutions of the drift-diffusion equations. We use this model to investigate the interplay between light trapping, and bulk and surface recombination. Special attention is paid to surface recombination processes, which become more important in thinner devices. These effects are further amplified due to the textures required for light trapping, which lead to increased surface area. We show that c-Si solar cells with thickness of a few microns can overcome 20% efficiency and outperform bulk ones when light trapping is implemented. The optimal device thickness in presence of light trapping, bulk and surface recombination, is quantified to be in the range of 10–80??m, depending on the bulk quality. These results hold, provided the effective surface recombination is kept below a critical level of the order of 100?cm/s. We discuss the possibility of meeting this requirement, in the context of state-of-the-art techniques for light trapping and surface passivation. We show that our predictions are within the capability of present day silicon technologies.

  12. Low-cost thin-material solar technology, the key to a viable energy alternative

    SciTech Connect (OSTI)

    Wilhelm, W.G.; Ripel, B.D.

    1985-08-01

    The creation of a solar technology based on a dramatic reduction in material intensity and greater simplicity of design is the result of a cost-guided research approach. It takes advantage of a progressive material science based on polymer films and unique construction methods that optimize material requirements, performance and durability. The current level of technical maturity has revealed a solar collector design that has the potential for a dramatic reduction in installed cost while maintaining high thermal performance and durability. In addition, the same methodology has guided total solar system designs with similar economies and performance advantages.

  13. Low-cost solar collectors using thin-film plastics absorbers and glazings

    SciTech Connect (OSTI)

    Wilhelm, W.G.

    1980-01-01

    The design, fabrication, performance, cost, and marketing of flat plate solar collectors using plastic absorbers and glazings are described. Manufacturing cost breakdowns are given for single-glazed and double-glazed collectors. (WHK)

  14. Light trapping in thin film solar cells using textured photonic crystal

    DOE Patents [OSTI]

    Yi, Yasha (Somerville, MA); Kimerling, Lionel C. (Concord, MA); Duan, Xiaoman (Amesbury, MA); Zeng, Lirong (Cambridge, MA)

    2009-01-27

    A solar cell includes a photoactive region that receives light. A photonic crystal is coupled to the photoactive region, wherein the photonic crystal comprises a distributed Bragg reflector (DBR) for trapping the light.

  15. Received 13 May 2013 | Accepted 18 Nov 2013 | Published 16 Dec 2013 All-back-contact ultra-thin silicon nanocone solar

    E-Print Network [OSTI]

    Cui, Yi

    , Stanford, California 94305, USA. 3 Stanford Institute for Materials and Energy Sciences, SLAC National, Stanford, California 94305, USA. 2 Department of Materials Science and Engineering, Stanford University-thin silicon nanocone solar cells with 13.7% power conversion efficiency Sangmoo Jeong1, Michael D. McGehee2

  16. BASSET: Scalable Gateway Finder in Large Graphs

    SciTech Connect (OSTI)

    Tong, H; Papadimitriou, S; Faloutsos, C; Yu, P S; Eliassi-Rad, T

    2010-11-03

    Given a social network, who is the best person to introduce you to, say, Chris Ferguson, the poker champion? Or, given a network of people and skills, who is the best person to help you learn about, say, wavelets? The goal is to find a small group of 'gateways': persons who are close enough to us, as well as close enough to the target (person, or skill) or, in other words, are crucial in connecting us to the target. The main contributions are the following: (a) we show how to formulate this problem precisely; (b) we show that it is sub-modular and thus it can be solved near-optimally; (c) we give fast, scalable algorithms to find such gateways. Experiments on real data sets validate the effectiveness and efficiency of the proposed methods, achieving up to 6,000,000x speedup.

  17. Low-cost light-weight thin material solar heating system

    SciTech Connect (OSTI)

    Wilhelm, W.G.

    1985-03-01

    Presented in this paper are innovative concepts to substantially reduce the cost of residential solar application. They were based on a research and development approach that establishes cost goals which if successfully met can insure high marketability. Included in this cost goal-oriented approach is the additional need to address aesthetics and performance. With such constraints established, designs were initialized, tested, and iterated towards appropriate solutions. These solutions are based on methods for reducing the material intensity of the products, improving the simplicity for ease of production, and reducing the cost of installation. Such a development approach has yielded past proof-of-concept designs in the solar collector and in the other components that constitute a total solar heating system.

  18. Exploring the connection between coronal and footpoint sources in a thin-thick target solar flare model

    E-Print Network [OSTI]

    Marina Battaglia; Arnold O. Benz

    2007-02-12

    Context: Hard X-ray emission of coronal sources in solar flares has been observed and studied since its discovery in Yohkoh observations. Several models have been proposed to explain the physical mechanisms causing this emission and the relations between those sources and simultaneously observed footpoint sources. Aims: We investigate and test one of the models (intermediate thin-thick target model) developed on the basis of Yohkoh observations. The model makes precise predictions on the shape of coronal and footpoint spectra and the relations between them, that can be tested with new instruments such as RHESSI. Methods: RHESSI observations of well observed events are studied in imaging and spectroscopy and compared to the predictions from the intermediate thin-thick target model. Results: The results indicate that such a simple model cannot account for the observed relations between the non-thermal spectra of coronal and footpoint sources. Including non-collisional energy loss of the electrons in the flare loop due to an electric field can solve most of the inconsistencies.

  19. Thin film solar cells by selenization sulfurization using diethyl selenium as a selenium precursor

    DOE Patents [OSTI]

    Dhere, Neelkanth G.; Kadam, Ankur A.

    2009-12-15

    A method of forming a CIGSS absorber layer includes the steps of providing a metal precursor, and selenizing the metal precursor using diethyl selenium to form a selenized metal precursor layer (CIGSS absorber layer). A high efficiency solar cell includes a CIGSS absorber layer formed by a process including selenizing a metal precursor using diethyl selenium to form the CIGSS absorber layer.

  20. TRIPLE-JUNCTION A-SI SOLAR CELLS WITH HEAVILY DOPED THIN INTERFACE LAYERS AT THE TUNNEL W. Wang, H. Povolny, W. Du, X.B. Liao and X. Deng

    E-Print Network [OSTI]

    Deng, Xunming

    TRIPLE-JUNCTION A-SI SOLAR CELLS WITH HEAVILY DOPED THIN INTERFACE LAYERS AT THE TUNNEL JUNCTIONS W of Toledo, Toledo, OH 43606 USA ABSTRACT Triple-junction a-Si based solar cells, having a structure of SS cells and between the middle and bottom component cells on the efficiency of triple- junction solar

  1. Thin film solar cells using impure polycrystalline silicon M. Rodot (1), M. Barbe (1), J. E. Bouree (1), V. Perraki (*) (1), G. Revel (2),R. Kishore (2) (**), J. L. Pastol (2), R. Mertens (3), M. Caymax (3) and M. Eyckmans

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    687 Thin film solar cells using impure polycrystalline silicon M. Rodot (1), M. Barbe (1), J. E avec les autres aptes à l'utilisation de Si-UMG bon marché. Abstract. 2014 Epitaxial solar cells have and electron diffusion length adequate to produce good solar cells. 10.3 % efficiency cells have been obtained

  2. T-701: Citrix Access Gateway Enterprise Edition Input Validation...

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

    ABSTRACT: Citrix Access Gateway Enterprise Edition Input Validation Flaw in Logon Portal Permits Cross-Site Scripting Attacks. reference LINKS: SecurityTracker Alert ID:...

  3. V-153: Symantec Brightmail Gateway Input Validation Flaw Permits...

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

    T-701: Citrix Access Gateway Enterprise Edition Input Validation Flaw in Logon Portal Permits Cross-Site Scripting Attacks U-001:Symantec IM Manager Input Validation Flaws...

  4. DOE Publishes GATEWAY Report on Pedestrian Friendly Outdoor Lighting...

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

    Energy (DOE) has published a new GATEWAY report entitled Pedestrian Friendly Outdoor Lighting. Recognizing that pedestrian lighting has different criteria for success than street...

  5. V-106: Citrix Access Gateway Unspecified Security Bypass Vulnerability

    Broader source: Energy.gov [DOE]

    A vulnerability has been reported in Citrix Access Gateway, which can be exploited by malicious people to bypass certain security restrictions.

  6. Alaska Gateway School District Adopts Combined Heat and Power...

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

    Tok, Alaska, the economic impact of high fuel prices was crippling the community's economy, especially for the Alaska Gateway School District, with staff laid off and double...

  7. (Sr,Ba)(Si,Ge){sub 2} for thin-film solar-cell applications: First-principles study

    SciTech Connect (OSTI)

    Kumar, Mukesh E-mail: mkgarg79@gmail.com; Umezawa, Naoto; Imai, Motoharu

    2014-05-28

    In order to meet the increasing demand for electric power generation from solar energy conversion, the development of efficient light absorber materials has been awaited. To this end, the electronic and optical properties of advanced alkaline-earth-metals disilicides and digermanides (SrSi{sub 2}, BaSi{sub 2}, SrGe{sub 2}, and BaGe{sub 2}) are studied by means of the density functional theory using HSE06 exchange-correlation energy functional. Our calculations show that all these orthorhombic structured compounds have fundamental indirect band gaps in the range E{sub g} ? 0.89–1.25 eV, which is suitable for solar cell applications. The estimated lattice parameters and band gaps are in good agreement with experiments. Our calculations show that the electronic band structures of all four compounds are very similar except in the vicinity of the ?-point. The valence band of these compounds is made up by Si(Ge)-p states, whereas the conduction band is composed of Sr(Ba)-d states. Their band alignments are carefully determined by estimating the work function of each compound using slab model. The optical properties are discussed in terms of the complex dielectric function ?(?)?=??{sub 1}(?)?+?i?{sub 2}(?). The static and high-frequency dielectric constants are calculated, taking into account the ionic contribution. The absorption coefficient ?(?) demonstrates that a low energy dispersion of the conduction band, which results in a flat conduction band minimum, leads to large optical activity in these compounds. Therefore, alkaline-earth-metals disilicides and digermanides possess great potential as light absorbers for applications in thin-film solar cell technologies.

  8. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01

    10MW Thin Film Solar Power Plant for Sempra Generation. ”2009). “Concentrating solar power plants of the southwest1.11. Concentrating solar power plants of the southwest

  9. Thin film cadmium telluride, zinc telluride, and mercury zinc telluride solar cells. Final subcontract report, 1 July 1988--31 December 1991

    SciTech Connect (OSTI)

    Chu, T.L.

    1992-04-01

    This report describes research to demonstrate (1) thin film cadmium telluride solar cells with a quantum efficiency of 75% or higher at 0. 44 {mu}m and a photovoltaic efficiency of 11.5% or greater, and (2) thin film zinc telluride and mercury zinc telluride solar cells with a transparency to sub-band-gap radiation of 65% and a photovoltaic conversion efficiency of 5% and 8%, respectively. Work was directed at (1) depositing transparent conducting semiconductor films by solution growth and metal-organic chemical vapor deposition (MOCVD) technique, (2) depositing CdTe films by close-spaced sublimation (CSS) and MOCVD techniques, (3) preparing and evaluating thin film CdTe solar cells, and (4) preparing and characterizing thin film ZnTe, CD{sub 1-x}Zn{sub 1-x}Te, and Hg{sub 1-x}Zn{sub x}Te solar cells. The deposition of CdS films from aqueous solutions was investigated in detail, and their crystallographic, optical, and electrical properties were characterized. CdTe films were deposited from DMCd and DIPTe at 400{degrees}C using TEGa and AsH{sub 3} as dopants. CdTe films deposited by CSS had significantly better microstructures than those deposited by MOCVD. Deep energy states in CdTe films deposited by CSS and MOCVD were investigated. Thin films of ZnTe, Cd{sub 1- x}Zn{sub x}Te, and Hg{sub 1-x}Zn{sub x}Te were deposited by MOCVD, and their crystallographic, optical, and electrical properties were characterized. 67 refs.

  10. Multilayer nanoparticle arrays for broad spectrum absorption enhancement in thin film solar cells

    E-Print Network [OSTI]

    Krishnan, Aravind; Krishna, Siva Rama; Khan, Mohammed Zafar Ali

    2013-01-01

    In this paper, we present a theoretical study on the absorption efficiency enhancement of a thin film amorphous Silicon (a-Si) photovoltaic cell over a broad spectrum of wavelengths using multiple nanoparticle arrays. The light absorption efficiency is enhanced in the lower wavelengths by a nanoparticle array on the surface and in the higher wavelengths by another nanoparticle array embedded in the active region. The efficiency at intermediate wavelengths is enhanced by the constructive interference of plasmon coupled light. We optimize this design by tuning the radius of particles in both arrays, the period of the array and the distance between the two arrays. The optimization results in 61.44% increase in total quantum efficiency for a 500 nm thick a-Si substrate.

  11. Process for fabricating polycrystalline semiconductor thin-film solar cells, and cells produced thereby

    DOE Patents [OSTI]

    Wu, Xuanzhi (Golden, CO); Sheldon, Peter (Lakewood, CO)

    2000-01-01

    A novel, simplified method for fabricating a thin-film semiconductor heterojunction photovoltaic device includes initial steps of depositing a layer of cadmium stannate and a layer of zinc stannate on a transparent substrate, both by radio frequency sputtering at ambient temperature, followed by the depositing of dissimilar layers of semiconductors such as cadmium sulfide and cadmium telluride, and heat treatment to convert the cadmium stannate to a substantially single-phase material of a spinel crystal structure. Preferably, the cadmium sulfide layer is also deposited by radio frequency sputtering at ambient temperature, and the cadmium telluride layer is deposited by close space sublimation at an elevated temperature effective to convert the amorphous cadmium stannate to the polycrystalline cadmium stannate with single-phase spinel structure.

  12. High-performance parallel interface to synchronous optical network gateway

    DOE Patents [OSTI]

    St. John, W.B.; DuBois, D.H.

    1996-12-03

    Disclosed is a system of sending and receiving gateways interconnects high speed data interfaces, e.g., HIPPI interfaces, through fiber optic links, e.g., a SONET network. An electronic stripe distributor distributes bytes of data from a first interface at the sending gateway onto parallel fiber optics of the fiber optic link to form transmitted data. An electronic stripe collector receives the transmitted data on the parallel fiber optics and reforms the data into a format effective for input to a second interface at the receiving gateway. Preferably, an error correcting syndrome is constructed at the sending gateway and sent with a data frame so that transmission errors can be detected and corrected in a real-time basis. Since the high speed data interface operates faster than any of the fiber optic links the transmission rate must be adapted to match the available number of fiber optic links so the sending and receiving gateways monitor the availability of fiber links and adjust the data throughput accordingly. In another aspect, the receiving gateway must have sufficient available buffer capacity to accept an incoming data frame. A credit-based flow control system provides for continuously updating the sending gateway on the available buffer capacity at the receiving gateway. 7 figs.

  13. High-performance parallel interface to synchronous optical network gateway

    DOE Patents [OSTI]

    St. John, Wallace B. (Los Alamos, NM); DuBois, David H. (Los Alamos, NM)

    1996-01-01

    A system of sending and receiving gateways interconnects high speed data interfaces, e.g., HIPPI interfaces, through fiber optic links, e.g., a SONET network. An electronic stripe distributor distributes bytes of data from a first interface at the sending gateway onto parallel fiber optics of the fiber optic link to form transmitted data. An electronic stripe collector receives the transmitted data on the parallel fiber optics and reforms the data into a format effective for input to a second interface at the receiving gateway. Preferably, an error correcting syndrome is constructed at the sending gateway and sent with a data frame so that transmission errors can be detected and corrected in a real-time basis. Since the high speed data interface operates faster than any of the fiber optic links the transmission rate must be adapted to match the available number of fiber optic links so the sending and receiving gateways monitor the availability of fiber links and adjust the data throughput accordingly. In another aspect, the receiving gateway must have sufficient available buffer capacity to accept an incoming data frame. A credit-based flow control system provides for continuously updating the sending gateway on the available buffer capacity at the receiving gateway.

  14. 14%-efficient flexible CdTe solar cells on ultra-thin glass substrates

    SciTech Connect (OSTI)

    Rance, W. L.; Burst, J. M.; Reese, M. O.; Gessert, T. A.; Metzger, W. K.; Barnes, T. M. [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States); Meysing, D. M.; Wolden, C. A. [Colorado School of Mines, Golden, Colorado 80401 (United States); Garner, S.; Cimo, P. [Corning Incorporated, Corning, New York 14831 (United States)

    2014-04-07

    Flexible glass enables high-temperature, roll-to-roll processing of superstrate devices with higher photocurrents than flexible polymer foils because of its higher optical transmission. Using flexible glass in our high-temperature CdTe process, we achieved a certified record conversion efficiency of 14.05% for a flexible CdTe solar cell. Little has been reported on the flexibility of CdTe devices, so we investigated the effects of three different static bending conditions on device performance. We observed a consistent trend of increased short-circuit current and fill factor, whereas the open-circuit voltage consistently dropped. The quantum efficiency under the same static bend condition showed no change in the response. After storage in a flexed state for 24 h, there was very little change in device efficiency relative to its unflexed state. This indicates that flexible glass is a suitable replacement for rigid glass substrates, and that CdTe solar cells can tolerate bending without a decrease in device performance.

  15. Creating CZTS Thin Films Via Stacked Metallic CVD and Sulfurization

    E-Print Network [OSTI]

    Bielecki, Anthony

    2013-01-01

    film solar cells. CIGS solar cell efficiencies have beenCIGS, making it a favorable choice for thin-film solar cells.thin film solar cell [3]. However, use of CIGS has a number

  16. Mathematics 122 -Gateway Exam -Fall 96 The Gateway exam will consist of ten randomly chosen problems about integra-

    E-Print Network [OSTI]

    Torres, Rodolfo

    Mathematics 122 - Gateway Exam - Fall 96 The Gateway exam will consist of ten randomly nine pro* *blems without any mistakes. You need not simplify your answers, but if you do, the si* *m- plification must be error-free. If you fail to pass the exam you will be allow* *ed to retake it. When you

  17. Picosecond and nanosecond laser annealing and simulation of amorphous silicon thin films for solar cell applications

    SciTech Connect (OSTI)

    Theodorakos, I.; Zergioti, I.; Tsoukalas, D.; Raptis, Y. S.; Vamvakas, V.

    2014-01-28

    In this work, a picosecond diode pumped solid state laser and a nanosecond Nd:YAG laser have been used for the annealing and the partial nano-crystallization of an amorphous silicon layer. These experiments were conducted as an alternative/complementary to plasma-enhanced chemical vapor deposition method for fabrication of micromorph tandem solar cell. The laser experimental work was combined with simulations of the annealing process, in terms of temperature distribution evolution, in order to predetermine the optimum annealing conditions. The annealed material was studied, as a function of several annealing parameters (wavelength, pulse duration, fluence), as far as it concerns its structural properties, by X-ray diffraction, SEM, and micro-Raman techniques.

  18. Effect of In Situ Thermal Annealing Process on Structural, Optical and Electrical Properties of CdS\\CdTe Thin-Film Solar Cells Fabricated by Pulsed Laser Deposition

    E-Print Network [OSTI]

    Al-mebir, Alaa Ayad Khedhair

    2015-08-31

    Cadmium Telluride has long been recognized as the second lowest- cost material after Si in the world photovoltaic market, specifically for thin-film solar cells. The two attractive properties of the CdTe are its nearly ...

  19. High efficiency low cost thin film silicon solar cell design and method for making

    DOE Patents [OSTI]

    Sopori, Bhushan L. (Denver, CO)

    1999-01-01

    A semiconductor device having a substrate, a conductive intermediate layer deposited onto said substrate, wherein the intermediate layer serves as a back electrode, an optical reflector, and an interface for impurity gettering, and a semiconductor layer deposited onto said intermediate layer, wherein the semiconductor layer has a grain size at least as large as the layer thickness, and preferably about ten times the layer thickness. The device is formed by depositing a metal layer on a substrate, depositing a semiconductive material on the metal-coated substrate to produce a composite structure, and then optically processing the composite structure by illuminating it with infrared electromagnetic radiation according to a unique time-energy profile that first produces pits in the backside surface of the semiconductor material, then produces a thin, highly reflective, low resistivity alloy layer over the entire area of the interface between the semiconductor material and the metal layer, and finally produces a grain-enhanced semiconductor layer. The time-energy profile includes increasing the energy to a first energy level to initiate pit formation and create the desired pit size and density, then ramping up to a second energy level in which the entire device is heated to produce an interfacial melt, and finally reducing the energy to a third energy level and holding for a period of time to allow enhancement in the grain size of the semiconductor layer.

  20. High efficiency low cost thin film silicon solar cell design and method for making

    DOE Patents [OSTI]

    Sopori, B.L.

    1999-04-27

    A semiconductor device is described having a substrate, a conductive intermediate layer deposited onto said substrate, wherein the intermediate layer serves as a back electrode, an optical reflector, and an interface for impurity gettering, and a semiconductor layer deposited onto said intermediate layer, wherein the semiconductor layer has a grain size at least as large as the layer thickness, and preferably about ten times the layer thickness. The device is formed by depositing a metal layer on a substrate, depositing a semiconductive material on the metal-coated substrate to produce a composite structure, and then optically processing the composite structure by illuminating it with infrared electromagnetic radiation according to a unique time-energy profile that first produces pits in the backside surface of the semiconductor material, then produces a thin, highly reflective, low resistivity alloy layer over the entire area of the interface between the semiconductor material and the metal layer, and finally produces a grain-enhanced semiconductor layer. The time-energy profile includes increasing the energy to a first energy level to initiate pit formation and create the desired pit size and density, then ramping up to a second energy level in which the entire device is heated to produce an interfacial melt, and finally reducing the energy to a third energy level and holding for a period of time to allow enhancement in the grain size of the semiconductor layer. 9 figs.

  1. High efficiency, low cost, thin film silicon solar cell design and method for making

    DOE Patents [OSTI]

    Sopori, Bhushan L. (Denver, CO)

    2001-01-01

    A semiconductor device having a substrate, a conductive intermediate layer deposited onto said substrate, wherein the intermediate layer serves as a back electrode, an optical reflector, and an interface for impurity gettering, and a semiconductor layer deposited onto said intermediate layer, wherein the semiconductor layer has a grain size at least as large as the layer thickness, and preferably about ten times the layer thickness. The device is formed by depositing a metal layer on a substrate, depositing a semiconductive material on the metal-coated substrate to produce a composite structure, and then optically processing the composite structure by illuminating it with infrared electromagnetic radiation according to a unique time-energy profile that first produces pits in the backside surface of the semiconductor material, then produces a thin, highly reflective, low resistivity alloy layer over the entire area of the interface between the semiconductor material and the metal layer, and finally produces a grain-enhanced semiconductor layer. The time-energy profile includes increasing the energy to a first energy level to initiate pit formation and create the desired pit size and density, then ramping up to a second energy level in which the entire device is heated to produce an interfacial melt, and finally reducing the energy to a third energy level and holding for a period of time to allow enhancement in the grain size of the semiconductor layer.

  2. Integration of a 2D Periodic Nanopattern Into Thin Film Polycrystalline Silicon Solar Cells by Nanoimprint Lithography

    E-Print Network [OSTI]

    Abdo, Islam; Deckers, Jan; Depauw, Valérie; Tous, Loic; Van Gestel, Dries; Guindi, Rafik; Gordon, Ivan; Daif, Ounsi El

    2015-01-01

    The integration of two-dimensional (2D) periodic nanopattern defined by nanoimprint lithography and dry etching into aluminum induced crystallization (AIC) based polycrystalline silicon (Poly-Si) thin film solar cells is investigated experimentally. Compared to the unpatterned cell an increase of 6% in the light absorption has been achieved thanks to the nanopattern which, in turn, increased the short circuit current from 20.6 mA/cm2 to 23.8 mA/cm2. The efficiency, on the other hand, has limitedly increased from 6.4% to 6.7%. We show using the transfer length method (TLM) that the surface topography modification caused by the nanopattern has increased the sheet resistance of the antireflection coating (ARC) layer as well as the contact resistance between the ARC layer and the emitter front contacts. This, in turn, resulted in increased series resistance of the nanopatterned cell which has translated into a decreased fill factor, explaining the limited increase in efficiency.

  3. Theoretical Analysis of Effects of Deep Level, Back Contact, and Absorber Thickness on Capacitance-Voltage Profiling of CdTe Thin-Film Solar Cells

    SciTech Connect (OSTI)

    Li, J. V.; Halverson, A. F.; Sulima, O. V.; Bansal, S.; Burst, J. M.; Barnes, T. M.; Gessert, T. A.; Levi, D. H.

    2012-05-01

    The apparent carrier density profile measured by the capacitance-voltage technique in CdTe thin-film solar cells frequently displays a distinctive U-shape. We show that, even assuming a uniform carrier density, such a U-shape may arise from deep levels, a non-ohmic back-contact, and a thin absorber, which are commonly present in practical CdTe thin-film solar cells. A thin CdTe absorber contributes to the right branch of the U-shape due to a punch-through effect at reverse or zero biases, when the CdTe absorber is nearly fully depleted. A rectifying back-contact contributes to both branches of the U-shape due to voltage sharing with the front junction under a forward bias and early punch-through under a reverse bias. Deep levels contribute to the right branch, but also raise the bottom of the U-shape, leading to an overestimate of carrier density.

  4. Gateway:Low Emission Development Strategies | Open Energy Information

    Open Energy Info (EERE)

    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 QA:QAsource History View New PagesSustainable UrbanKentucky: EnergyGateway Edit History Gateway:Low EmissionGateway

  5. High Efficiency CdTe/CdS Thin Film Solar Cells Prepared by Treating CdTe Films with a Freon Gas in Substitution of CdCl2

    E-Print Network [OSTI]

    Romeo, Alessandro

    High Efficiency CdTe/CdS Thin Film Solar Cells Prepared by Treating CdTe Films with a Freon Gas a sufficient conversion efficiency to be considered for an industrial application. The fabrication process observed. Solar cell efficiency obtained with this treatment, close to 16%, is comparable if not larger

  6. Solar Energy Materials & Solar Cells 92 (2008) 821829 Modeling the optical properties of WO3 and WO3SiO2 thin films

    E-Print Network [OSTI]

    Thirumalai, Devarajan

    2008-01-01

    Solar Energy Materials & Solar Cells 92 (2008) 821­829 Modeling the optical properties of WO3 the optical response of the films in the near-UV and visible region: two interband transitions for energies E

  7. High-Efficiency CdTe and CIGS Thin-Film Solar Cells: Highlights and Challenges; Preprint

    SciTech Connect (OSTI)

    Noufi, R.; Zweibel, K.

    2006-05-01

    Thin-film photovoltaic (PV) modules of CdTe and Cu(In,Ga)Se2 (CIGS) have the potential to reach cost-effective PV-generated electricity. These technologies have transitioned from the laboratory to the market place. Pilot production and first-time manufacturing are ramping up to higher capacity and enjoying a flood of venture-capital funding. CIGS solar cells and modules have achieved 19.5% and 13% efficiencies, respectively. Likewise, CdTe cells and modules have reached 16.5% and 10.2% efficiencies, respectively. Even higher efficiencies from the laboratory and from the manufacturing line are only a matter of time. Manufacturing-line yield continues to improve and is surpassing 85%. Long-term stability has been demonstrated for both technologies; however, some failures in the field have also been observed, emphasizing the critical need for understanding degradation mechanisms and packaging options. The long-term potential of the two technologies require R&D emphasis on science and engineering-based challenges to find solutions to achieve targeted cost-effective module performance, and in-field durability. Some of the challenges are common to both, e.g., in-situ process control and diagnostics, thinner absorber, understanding degradation mechanisms, protection from water vapor, and innovation in high-speed processing and module design. Other topics are specific to the technology, such as lower-cost and fast-deposition processes for CIGS, and improved back contact and voltage for CdTe devices.

  8. DOE Publishes GATEWAY Report on Exterior Lighting at Princeton...

    Office of Environmental Management (EM)

    Exterior Lighting at Princeton University DOE Publishes GATEWAY Report on Exterior Lighting at Princeton University October 30, 2015 - 1:46pm Addthis The U.S. Department of...

  9. DOE Publishes GATEWAY Report on LED Lighting in a Performing...

    Energy Savers [EERE]

    LED Lighting in a Performing Arts Setting DOE Publishes GATEWAY Report on LED Lighting in a Performing Arts Setting August 6, 2014 - 2:46pm Addthis The U.S. Department of Energy...

  10. DOE Publishes GATEWAY Report on Pedestrian Friendly Outdoor Lighting...

    Energy Savers [EERE]

    Pedestrian Friendly Outdoor Lighting DOE Publishes GATEWAY Report on Pedestrian Friendly Outdoor Lighting January 9, 2014 - 3:55pm Addthis The U.S. Department of Energy (DOE) has...

  11. T-544: Cisco Security Advisory: Cisco Content Services Gateway...

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

    Cisco Content Services Gateway Vulnerabilities PLATFORM: Cisco IOS Software Release 12.4(24)MD1 on the Cisco CSG2 ABSTRACT: Cisco IOS Software Release 12.4(24)MD1 on the Cisco CSG2...

  12. New GATEWAY Report Monitors LED System Performance in a High...

    Energy Savers [EERE]

    the Yuma (Arizona) Sector Border Patrol Area. Six LED luminaires - installed on three poles as part of a trial installation detailed in a prior GATEWAY report - continue to be...

  13. Oxidation of In2S3 films to synthetize In2S3(1-x)O3x thin films as a buffer layer in solar cells

    E-Print Network [OSTI]

    Boyer, Edmond

    for fabricating Cd-free CIGS solar cells [1, 2, 3]. One of its advantages is that it can be obtained from solutionOxidation of In2S3 films to synthetize In2S3(1-x)O3x thin films as a buffer layer in solar cells S layers for solar cells. PACS : 68.55.ag Semiconductors, 68.55.J Morphology of films , 68.55.Nq

  14. High-performance parallel interface to synchronous optical network gateway

    DOE Patents [OSTI]

    St. John, Wallace B. (Los Alamos, NM); DuBois, David H. (Los Alamos, NM)

    1998-08-11

    A digital system provides sending and receiving gateways for HIPPI interfaces. Electronic logic circuitry formats data signals and overhead signals in a data frame that is suitable for transmission over a connecting fiber optic link. Multiplexers route the data and overhead signals to a framer module. The framer module allocates the data and overhead signals to a plurality of 9-byte words that are arranged in a selected protocol. The formatted words are stored in a storage register for output through the gateway.

  15. Gateway:Low Emission Development Strategies | Open Energy Information

    Open Energy Info (EERE)

    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 QA:QAsource History View New PagesSustainable UrbanKentucky: EnergyGateway Edit History Gateway:Low

  16. Optimized Designs and Materials for Nanostructure Based Solar Cells

    E-Print Network [OSTI]

    Shao, Qinghui

    2009-01-01

    the production cost, thin film solar cells with only a fewstate-of-the-art thin film solar cell design and processingintermediate band solar cell,” Thin Solid Films, 511-512,

  17. The Effects of Non-Uniform Electronic Properties on Thin Film Photovoltaics

    E-Print Network [OSTI]

    Brown, Gregory Ferguson

    2011-01-01

    Intensity  in  Thin  Film  Solar  Cells   3.2.1   U.  Rau,  EL)  Intensity   in  Thin  Film  Solar  Cells   3.3  properties  of  thin  film  solar  cell   absorbers,  with  

  18. The Roles of Cu Impurity States in CdTe Thin Film Solar Cells Ken K. Chin1

    E-Print Network [OSTI]

    as commercially successful, second generation thin film photovoltaic (PV) products, at a production cost of $0 PV technologies, such as Cu(In,Ga)Se2 (CIGS), which has a lower theoretical limit ~26% but a higher involves Cu impurities. The CdTe thin film uses low cost 5N tellurium, which, either as a byproduct

  19. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01

    Solar Completes 10MW Thin Film Solar Power Plant for SempraT. ; (2008) Concentrating Solar Power—Technology, Cost, and2009). “Concentrating solar power plants of the southwest

  20. ZnO/a-Si Distributed Bragg Reflectors for Light Trapping in Thin Film Solar Cells from Visible to Infrared Range

    E-Print Network [OSTI]

    Chen, Aqing; Zhu, Kaigui

    2015-01-01

    Distributed bragg reflectors (DBRs) consisting of ZnO and amorphous silicon (a-Si) were prepared by magnetron sputtering method for selective light trapping. The quarter-wavelength ZnO/a-Si DBRs with only 6 periods exhibit a peak reflectance of above 99% and have a full width at half maximum that is greater than 347 nm in the range of visible to infrared. The 6-pair reversed quarter-wavelength ZnO/a-Si DBRs also have a peak reflectance of 98%. Combination of the two ZnO/a-Si DBRs leads to a broader stopband from 686 nm to 1354 nm. Using the ZnO/a-Si DBRs as the rear reflector of a-Si thin film solar cells significantly increases the photocurrent in the spectrum range of 400 nm to 1000 nm, in comparison with that of the cells with Al reflector. The obtained results suggest that ZnO/a-Si DBRs are promising reflectors of a-Si thin-film solar cells for light trapping.

  1. Cu(In,Ga)Se2 alloys are the leading choice for absorber layers in high-efficiency thin film solar cells due to their direct gap, high absorption

    E-Print Network [OSTI]

    Rockett, Angus

    film solar cells due to their direct gap, high absorption coefficient and excellent thermal stability]/[In+Ga]SubstrateCrystalSample *Negligible amount of Ga diffused into back of film from substrate; not detectable by EDX Device structure GaAs(In,Ga)SePhotoluminescence Excitation Spectroscopy of Cu(In,Ga)Se22 Thin FilmsThin Films Damon Hebert, Julio Soares, Marie Mayer, Angus

  2. DOE Publishes 20K Hour Testing Results for 2008 GATEWAY Bridge...

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

    20K Hour Testing Results for 2008 GATEWAY Bridge Installation DOE Publishes 20K Hour Testing Results for 2008 GATEWAY Bridge Installation October 9, 2014 - 12:00pm Addthis The U.S....

  3. U-020: McAfee Web Gateway Web Access Cross Site Scripting Vulnerabilit...

    Office of Environmental Management (EM)

    0: McAfee Web Gateway Web Access Cross Site Scripting Vulnerability U-020: McAfee Web Gateway Web Access Cross Site Scripting Vulnerability October 26, 2011 - 9:00am Addthis...

  4. OpenMSI: A Science Gateway to Sort Through Bio-Imaging's Big...

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

    OpenMSI: A Science Gateway to Sort Through Bio-Imaging's Big Datasets OpenMSI: A Science Gateway to Sort Through Bio-Imaging's Big Datasets August 27, 2013 | Tags: Basic Energy...

  5. Apparatus for forming thin-film heterojunction solar cells employing materials selected from the class of I-III-VI.sub.2 chalcopyrite compounds

    DOE Patents [OSTI]

    Mickelsen, Reid A. (Bellevue, WA); Chen, Wen S. (Seattle, WA)

    1983-01-01

    Apparatus for forming thin-film, large area solar cells having a relatively high light-to-electrical energy conversion efficiency and characterized in that the cell comprises a p-n-type heterojunction formed of: (i) a first semiconductor layer comprising a photovoltaic active material selected from the class of I-III-VI.sub.2 chalcopyrite ternary materials which is vacuum deposited in a thin "composition-graded" layer ranging from on the order of about 2.5 microns to about 5.0 microns (.congruent.2.5 .mu.m to .congruent.5.0 .mu.m) and wherein the lower region of the photovoltaic active material preferably comprises a low resistivity region of p-type semiconductor material having a superimposed region of relatively high resistivity, transient n-type semiconductor material defining a transient p-n homojunction; and (ii), a second semiconductor layer comprising a low resistivity n-type semiconductor material wherein interdiffusion (a) between the elemental constituents of the two discrete juxtaposed regions of the first semiconductor layer defining a transient p-n homojunction layer, and (b) between the transient n-type material in the first semiconductor layer and the second n-type semiconductor layer, causes the transient n-type material in the first semiconductor layer to evolve into p-type material, thereby defining a thin layer heterojunction device characterized by the absence of voids, vacancies and nodules which tend to reduce the energy conversion efficiency of the system.

  6. McAfee, Inc. McAfee Web Gateway WG5000 and WG5500 Appliances

    E-Print Network [OSTI]

    McAfee, Inc. McAfee Web Gateway WG5000 and WG5500 Appliances Hardware Models: 5000, 5500; Firmware Policy, Version 1.9 August 17, 2012 McAfee Web Gateway WG5000 and WG5500 Appliances Page 2 of 32 © 2012............................................................................................................................4 2 MCAFEE WEB GATEWAY WG5000 AND WG5500 APPLIANCES ................................5 2.1 OVERVIEW

  7. HotGrid: Graduated Access to Grid-based Science Gateways

    E-Print Network [OSTI]

    Williams, Roy

    provide useful science gateways in the medium to long term, but also strong scientific results in the short term. We will explore the construction of "science gateways" which abstract the architectural in a familiar data-analysis environment. The gateway is thus utilized in several different ways: ­ Web form

  8. Reliable wet-chemical cleaning of natively oxidized high-efficiency Cu(In,Ga)Se{sub 2} thin-film solar cell absorbers

    SciTech Connect (OSTI)

    Lehmann, Jascha; Lehmann, Sebastian; Lauermann, Iver; Rissom, Thorsten; Kaufmann, Christian A.; Lux-Steiner, Martha Ch.; Bär, Marcus; Sadewasser, Sascha

    2014-12-21

    Currently, Cu-containing chalcopyrite-based solar cells provide the highest conversion efficiencies among all thin-film photovoltaic (PV) technologies. They have reached efficiency values above 20%, the same performance level as multi-crystalline silicon-wafer technology that dominates the commercial PV market. Chalcopyrite thin-film heterostructures consist of a layer stack with a variety of interfaces between different materials. It is the chalcopyrite/buffer region (forming the p-n junction), which is of crucial importance and therefore frequently investigated using surface and interface science tools, such as photoelectron spectroscopy and scanning probe microscopy. To ensure comparability and validity of the results, a general preparation guide for “realistic” surfaces of polycrystalline chalcopyrite thin films is highly desirable. We present results on wet-chemical cleaning procedures of polycrystalline Cu(In{sub 1-x}Ga{sub x})Se{sub 2} thin films with an average x?=?[Ga]/([In]?+?[Ga])?=?0.29, which were exposed to ambient conditions for different times. The hence natively oxidized sample surfaces were etched in KCN- or NH{sub 3}-based aqueous solutions. By x-ray photoelectron spectroscopy, we find that the KCN treatment results in a chemical surface structure which is – apart from a slight change in surface composition – identical to a pristine as-received sample surface. Additionally, we discover a different oxidation behavior of In and Ga, in agreement with thermodynamic reference data, and we find indications for the segregation and removal of copper selenide surface phases from the polycrystalline material.

  9. Cadmium-free junction fabrication process for CuInSe.sub.2 thin film solar cells

    DOE Patents [OSTI]

    Ramanathan, Kannan V. (Lakewood, CA); Contreras, Miguel A. (Golden, CA); Bhattacharya, Raghu N. (Littleton, CA); Keane, James (Lakewood, CA); Noufi, Rommel (Golden, CA)

    1999-01-01

    The present invention provides an economical, simple, dry and controllable semiconductor layer junction forming process to make cadmium free high efficiency photovoltaic cells having a first layer comprised primarily of copper indium diselenide having a thin doped copper indium diselenide n-type region, generated by thermal diffusion with a group II(b) element such as zinc, and a halide, such as chlorine, and a second layer comprised of a conventional zinc oxide bilayer. A photovoltaic device according the present invention includes a first thin film layer of semiconductor material formed primarily from copper indium diselenide. Doping of the copper indium diselenide with zinc chloride is accomplished using either a zinc chloride solution or a solid zinc chloride material. Thermal diffusion of zinc chloride into the copper indium diselenide upper region creates the thin n-type copper indium diselenide surface. A second thin film layer of semiconductor material comprising zinc oxide is then applied in two layers. The first layer comprises a thin layer of high resistivity zinc oxide. The second relatively thick layer of zinc oxide is doped to exhibit low resistivity.

  10. Gateway:Low Emission Development Strategies | Open Energy Information

    Open Energy Info (EERE)

    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 QA:QAsource History View New PagesSustainable UrbanKentucky: EnergyGateway Edit History Gateway:Low Emission

  11. Multi-resonant silver nano-disk patterned thin film hydrogenated amorphous silicon solar cells for Staebler-Wronski effect compensation

    E-Print Network [OSTI]

    Vora, Ankit; Pearce, Joshua M; Bergstrom, Paul L; Güney, Durdu Ö

    2014-01-01

    We study polarization independent improved light trapping in commercial thin film hydrogenated amorphous silicon (a-Si:H) solar photovoltaic cells using a three-dimensional silver array of multi-resonant nano-disk structures embedded in a silicon nitride anti-reflection coating (ARC) to enhance optical absorption in the intrinsic layer (i-a-Si:H) for the visible spectrum for any polarization angle. Predicted total optical enhancement (OE) in absorption in the i-a-Si:H for AM-1.5 solar spectrum is 18.51% as compared to the reference, and producing a 19.65% improvement in short-circuit current density (JSC) over 11.7 mA/cm2 for a reference cell. The JSC in the nano-disk patterned solar cell (NDPSC) was found to be higher than the commercial reference structure for any incident angle. The NDPSC has a multi-resonant optical response for the visible spectrum and the associated mechanism for OE in i-a-Si:H layer is excitation of Fabry-Perot resonance facilitated by surface plasmon resonances. The detrimental Staebl...

  12. Towards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non-radiative recombinations

    E-Print Network [OSTI]

    ://dx.doi.org/10.1063/1.4867008] I. INTRODUCTION A central focus of crystalline silicon (c-Si) solar cell research important evaluation criterion for photovoltaic (PV) technology. Therefore, research on novel structures

  13. CuInSe2 and its alloys are the leading choice for absorber layers in high-efficiency thin film solar cells due to their direct gap, high absorption coefficient and

    E-Print Network [OSTI]

    Rockett, Angus

    in CuInSe2. Epitaxial CuInSe2 thin films were deposited on GaAs bicrystal substrates using a hybrid film solar cells due to their direct gap, high absorption coefficient and excellent thermal stability epilayers to the GaAs bicrystal substrate. This allows isolation and optical characterization of individual

  14. St. Louis Sites Fact Sheet "Gateway to Excellence"

    E-Print Network [OSTI]

    US Army Corps of Engineers

    St. Louis Sites Fact Sheet CLEANUP "Gateway to Excellence" U.S. Army Corps of Engineers St. Louis of the St. Louis FUSRAP Sites under CERCLA. Let's look at each of these in turn. SAMPLING (PRE are documented in the Preliminary Design Investigation Report. DESIGN (REMEDIAL DESIGN) Based on the Pre

  15. Modeling of capacitance transients of thin-film solar cells: A valuable tool to gain information on perturbing layers or interfaces

    SciTech Connect (OSTI)

    Lauwaert, Johan Van Puyvelde, Lisanne; Vrielinck, Henk; Lauwaert, Jeroen; Thybaut, Joris W.

    2014-02-03

    Thin-film electronic and photovoltaic devices often comprise, in addition to the anticipated p-n junctions, additional non-ideal ohmic contacts between layers. This may give rise to additional signals in capacitance spectroscopy techniques that are not directly related to defects in the structure. In this paper, we present a fitting algorithm for transient signals arising from such an additional junction. The fitting results are in excellent agreement with the diode characteristics extracted from static measurements on individual components. Finally, the algorithm is applied for determining the barriers associated with anomalous signals reported for selected CuIn{sub 1–x}Ga{sub x}Se{sub 2} and CdTe solar cells.

  16. Design of anti-ring back reflectors for thin-film solar cells based on three-dimensional optical and electrical modeling

    SciTech Connect (OSTI)

    Hsiao, Hui-Hsin; Wu, Yuh-Renn, E-mail: yrwu@ntu.edu.tw [Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan (China); Chang, Hung-Chun [Graduate Institute of Photonics and Optoelectronics, Graduate Institute of Communication Engineering, and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan (China)

    2014-08-11

    The optical and electrical properties of a photonic-plasmonic nanostructure on the back contact of thin-film solar cells were investigated numerically through the three-dimensional (3D) finite-difference time-domain method and the 3D Poisson and drift-diffusion solver. The focusing effect and the Fabry-Perot resonances are identified as the main mechanisms for the enhancement of the optical generation rate as well as the short circuit current density. However, the surface topography of certain nanopattern structures is found to reduce the internal electrostatic field of the device, thus limiting charge collection. The optimized conditions for both optics and electronics have been analyzed in this paper.

  17. Nanowire-based All Oxide Solar Cells

    E-Print Network [OSTI]

    Yang, Peidong

    2009-01-01

    toxic elements in some thin film solar cells. The principalsolar cell also employing ZnO nanowires and a Cu 2 O thin film.

  18. Optimization of Processing and Modeling Issues for Thin-Film Solar Cell Devices; Annual Report, 3 February 1997-2 February 1998

    SciTech Connect (OSTI)

    Birkmire, R. W.; Phillips, J. E.; Shafarman, W. N.; Hegedus, S. S.; McCandless, B. E. (IEC, University of Delaware)

    1998-12-08

    This report describes results achieved during phase I of a four-phase subcontract to develop and understand thin-film solar cell technology associated with CuInSe2 and related alloys, a-Si and its alloys, and CdTe. Modules based on all these thin films are promising candidates to meet DOE long-range efficiency, reliability, and manufacturing cost goals. The critical issues being addressed under this program are intended to provide the science and engineering basis for developing viable commercial processes and to improve module performance. The generic research issues addressed are: (1) quantitative analysis of processing steps to provide information for efficient commercial-scale equipment design and operation; (2) device characterization relating the device performance to materials properties and process conditions; (3) development of alloy materials with different bandgaps to allow improved device structures for stability and compatibility with module design; (4) development of improved window/heterojunction layers and contacts to improve device performance and reliability; and (5) evaluation of cell stability with respect to illumination, temperature, and ambient and with respect to device structure and module encapsulation.

  19. Optically optimal wavelength-scale patterned ITO/ZnO composite coatings for thin film solar cells

    E-Print Network [OSTI]

    Moreau, Antoine; Centeno, Emmanuel; Seassal, Christian

    2012-01-01

    A new methodology is proposed for finding structures that are, optically speaking, locally optimal : a physical analysis of much simpler structures is used to constrain the optimization process. The obtained designs are based on a flat amorphous silicon layer (to minimize recombination) with a patterned anti-reflective coating made of ITO or ZnO, or a composite ITO/ZnO coating. These latter structures are realistic and present good performances despite very thin active layers.

  20. Processing-Dependent Growth Mechanisms and Performance Improvement of Kesterite Solar Cells

    E-Print Network [OSTI]

    Hsu, Wan-Ching

    2014-01-01

    Cu2ZnSnS,Se4 Thin-Film Solar Cells Prepared from Binary andW. N. Shafarman, “Thin-film solar cells: device measurementsof CZTSSe Thin-Film Solar Cells with 12.6% Efficiency,” Adv.

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

    E-Print Network [OSTI]

    Miller, Owen Dennis

    2012-01-01

    design setup for thin-film solar cell. An initial anti-in randomly textured thin-film solar cells,” Optics Express,tion enhancement in thin-film solar cells using whispering

  2. Structural Integration of Silicon Solar Cells and Lithium-ion Batteries Using Printed Electronics

    E-Print Network [OSTI]

    Kang, Jin Sung

    2012-01-01

    to integrate thin-film solar cells and batteries (2)methods for thin-film solar cells and batteries (4) Developamorphous silicon thin-film solar cell. Part number TX3-25

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

    E-Print Network [OSTI]

    Bezryadina, Anna Sergeyevna

    2012-01-01

    cells are also called thin-film solar cells, which currently10-12% [6]. Thin film solar cells are significantly cheaper,and lightweight, thin film solar cells can be rolled out

  4. Lead selenide nanowire solar cells via LPNE and its new found derivatives

    E-Print Network [OSTI]

    Hujdic, Justin

    2012-01-01

    absorption in a thin film solar cell; An AM1.5 filter solarin a thin film solar cell………………………………………………………………17 Figuregeometries for thin-film solar cells: (a) Light trapping by

  5. The Neutron Science TeraGrid Gateway, a TeraGrid Science Gateway to Support the Spallation Neutron Source

    E-Print Network [OSTI]

    Vazhkudai, Sudharshan

    by a service oriented architecture for functional implementation. KEY WORDS: Portal, Neutron Scattering, TeraGrid, Science Gateway, Service Architecture, Grid 1. INTRODUCTION Neutron Science: Neutron scattering is used, earth science, and fundamental physics [3]. As a diagnostic tool, neutron scattering provides unique

  6. Optimized Designs and Materials for Nanostructure Based Solar Cells

    E-Print Network [OSTI]

    Shao, Qinghui

    2009-01-01

    the-art thin film solar cell design and processing becauseto incorporate into the solar cell design the materials withor conventional tandem solar cell designs. The physical

  7. Enhancement of current collection in epitaxial lift-off InAs/GaAs quantum dot thin film solar cell and concentrated photovoltaic study

    SciTech Connect (OSTI)

    Sogabe, Tomah Shoji, Yasushi; Tamayo, Efrain; Okada, Yoshitaka; Mulder, Peter; Schermer, John

    2014-09-15

    We report the fabrication of a thin film InAs/GaAs quantum dot solar cell (QD cell) by applying epitaxial lift-off (ELO) approach to the GaAs substrate. We confirmed significant current collection enhancement (?0.91?mA/cm{sup 2}) in the ELO-InAs QD cell within the wavelength range of 700?nm–900?nm when compared to the ELO-GaAs control cell. This is almost six times of the sub-GaAs bandgap current collection (?0.16?mA/cm{sup 2}) from the wavelength range of 900?nm and beyond, we also confirmed the ELO induced resonance cavity effect was able to increase the solar cell efficiency by increasing both the short circuit current and open voltage. The electric field intensity of the resonance cavity formed in the ELO film between the Au back reflector and the GaAs front contact layer was analyzed in detail by finite-differential time-domain (FDTD) simulation. We found that the calculated current collection enhancement within the wavelength range of 700?nm–900?nm was strongly influenced by the size and shape of InAs QD. In addition, we performed concentrated light photovoltaic study and analyzed the effect of intermediate states on the open voltage under varied concentrated light intensity for the ELO-InAs QD cell.

  8. Investigation of Solar Energy Transfer through Plasmonic Au Nanoparticle-doped Sol-derived TiO? Thin Films in Photocatalysis and Photovoltaics /

    E-Print Network [OSTI]

    Zelinski, Andrew

    2013-01-01

    20 Solar Energy Conversion Throughmeasurements. 2 Solar Energy Conversion Through PlasmonicsPlasmon Enhanced Solar-to-Fuel Energy Conversion. Nano Lett.

  9. Investigation of Solar Energy Transfer through Plasmonic Au Nanoparticle-doped Sol-derived TiO? Thin Films in Photocatalysis and Photovoltaics /

    E-Print Network [OSTI]

    Zelinski, Andrew

    2013-01-01

    TiO 2 Thin Films in Photocatalysis and Photovoltaics ATiO 2 Thin Films in Photocatalysis and Photovoltaics by

  10. Value Proposition for High Lifetime (p-type) and Thin Silicon Materials in Solar PV Applications: Preprint

    SciTech Connect (OSTI)

    Goodrich, A.; Woodhouse, M.; Hacke, P.

    2012-06-01

    Most silicon PV road maps forecast a continued reduction in wafer thickness, despite rapid declines in the primary incentive for doing so -- polysilicon feedstock price. Another common feature of most silicon-technology forecasts is the quest for ever-higher device performance at the lowest possible costs. The authors present data from device-performance and manufacturing- and system-installation cost models to quantitatively establish the incentives for manufacturers to pursue advanced (thin) wafer and (high efficiency) cell technologies, in an age of reduced feedstock prices. This analysis exhaustively considers the value proposition for high lifetime (p-type) silicon materials across the entire c-Si PV supply chain.

  11. Photovoltaic mechanisms in polycrystalline thin film silicon solar cells. Final report, 30 June 1979-29 June 1980

    SciTech Connect (OSTI)

    Sopori, B.L.

    1980-11-01

    The objectives of this program were: (1) to develop appropriate measurement techniques to facilitate a quantitative study of the electrical activity of structural defects and at a grain boundary (G.B.) in terms of generation-recombination, barrier height, and G.B. conductivity; (2) to characterize G.B.s in terms of physical properties such as angle of misfit and local stress, and to correlate them with the electrical activity; (3) to determine the influence of solar cell processing on the electrical behavior of structural defects and G.B.s; and (4) to evaluate polycrystalline solar cell performance based on the above study, and to compare it with the experimentally measured performance. Progress is reported in detail. (WHK)

  12. Correlations of Capacitance-Voltage Hysteresis with Thin-Film CdTe Solar Cell Performance During Accelerated Lifetime Testing

    SciTech Connect (OSTI)

    Albin, D.; del Cueto, J.

    2011-03-01

    In this paper we present the correlation of CdTe solar cell performance with capacitance-voltage hysteresis, defined presently as the difference in capacitance measured at zero-volt bias when collecting such data with different pre-measurement bias conditions. These correlations were obtained on CdTe cells stressed under conditions of 1-sun illumination, open-circuit bias, and an acceleration temperature of approximately 100 degrees C.

  13. Method of fabricating high-efficiency Cu(In,Ga)(SeS).sub.2 thin films for solar cells

    DOE Patents [OSTI]

    Noufi, Rommel (Golden, CO); Gabor, Andrew M. (Boulder, CO); Tuttle, John R. (Denver, CO); Tennant, Andrew L. (Denver, CO); Contreras, Miguel A. (Golden, CO); Albin, David S. (Denver, CO); Carapella, Jeffrey J. (Evergreen, CO)

    1995-01-01

    A process for producing a slightly Cu-poor thin film of Cu(In,Ga)(Se,S).sub.2 comprises depositing a first layer of (In,Ga).sub.x (Se,S).sub.y followed by depositing just enough Cu+(Se,S) or Cu.sub.x (Se,S) to produce the desired slightly Cu-poor material. In a variation, most, but not all, (about 90 to 99%) of the (In,Ga).sub.x (Se,S).sub.y is deposited first, followed by deposition of all the Cu+(Se,S) or Cu.sub.x (Se,S) to go near stoichiometric, possibly or even preferably slightly Cu-rich, and then in turn followed by deposition of the remainder (about 1 to 10%) of the (In,Ga).sub.x (Se,S).sub.y to end with a slightly Cu-poor composition. In yet another variation, a small portion (about 1 to 10%) of the (In,Ga).sub.x (Se,S).sub.y is first deposited as a seed layer, followed by deposition of all of the Cu+(Se,S) or Cu.sub.x (Se,S) to make a very Cu-rich mixture, and then followed deposition of the remainder of the (In,Ga).sub.x (Se,S).sub.y to go slightly Cu-poor in the final Cu(In,Ga)(Se,S).sub.2 thin film.

  14. Method of fabricating high-efficiency Cu(In,Ga)(Se,S){sub 2} thin films for solar cells

    DOE Patents [OSTI]

    Noufi, R.; Gabor, A.M.; Tuttle, J.R.; Tennant, A.L.; Contreras, M.A.; Albin, D.S.; Carapella, J.J.

    1995-08-15

    A process for producing a slightly Cu-poor thin film of Cu(In,Ga)(Se,S){sub 2} comprises depositing a first layer of (In,Ga){sub x} (Se,S){sub y} followed by depositing just enough Cu+(Se,S) or Cu{sub x} (Se,S) to produce the desired slightly Cu-poor material. In a variation, most, but not all, (about 90 to 99%) of the (In,Ga){sub x} (Se,S){sub y} is deposited first, followed by deposition of all the Cu+(Se,S) or Cu{sub x} (Se,S) to go near stoichiometric, possibly or even preferably slightly Cu-rich, and then in turn followed by deposition of the remainder (about 1 to 10%) of the (In,Ga){sub x} (Se,S){sub y} to end with a slightly Cu-poor composition. In yet another variation, a small portion (about 1 to 10%) of the (In,Ga){sub x} (Se,S){sub y} is first deposited as a seed layer, followed by deposition of all of the Cu+(Se,S) or Cu{sub x} (Se,S) to make a very Cu-rich mixture, and then followed deposition of the remainder of the (In,Ga){sub x} (Se,S){sub y} to go slightly Cu-poor in the final Cu(In,Ga)(Se,S){sub 2} thin film. 5 figs.

  15. GATEWAY Univ of Maryland Report | 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 Rank EERE:FinancingPetroleum12,Executive Compensation References: FAR 31.205-6Applications |EnergyGATEWAY

  16. Blue Coat Systems, Inc. Secure Web Gateway Virtual Appliance-V100

    E-Print Network [OSTI]

    Blue Coat Systems, Inc. Secure Web Gateway Virtual Appliance-V100 Software Version: 6.5.2.8 FIPS@corsec.com http://www.bluecoat.com http://www.corsec.com #12;Secure Web Gateway Virtual Appliance-V100 Security Policy, Version 0.5 July 25, 2014 Blue Coat Secure Web Gateway Virtual Appliance-V100 Page 2 of 33 © 2014

  17. Research on high-efficiency, multiple-gap, multijunction, amorphous-silicon-based alloy thin-film solar cells

    SciTech Connect (OSTI)

    Guha, S. )

    1989-06-01

    This report presents results of research on advancing our understanding of amorphous-silicon-based alloys and their use in small-area multijunction solar cells. The principal objectives of the program are to develop a broad scientific base for the chemical, structural, optical, and electronic properties of amorphous-silicon-based alloys; to determine the optimum properties of these alloy materials as they relate to high-efficiency cells; to determine the optimum device configuration for multijunction cells; and to demonstrate proof-of-concept, multijunction, a-Si-alloy-based solar cells with 18% efficiency under standard AM1.5 global insolation conditions and with an area of at least 1 cm{sup 2}. A major focus of the work done during this reporting period was the optimization of a novel, multiple-graded structure that enhances cell efficiency through band-gap profiling. The principles of the operation of devices incorporating such a structure, computer simulations of those, and experimental results for both single- and multijunction cells prepared by using the novel structure are discussed in detail. 14 refs., 35 figs., 7 tabs.

  18. Solar Energy Materials & Solar Cells 90 (2006) 34073415 High-efficiency flexible CdTe solar cells

    E-Print Network [OSTI]

    Romeo, Alessandro

    2006-01-01

    Solar Energy Materials & Solar Cells 90 (2006) 3407­3415 High-efficiency flexible CdTe solar cells: Solar cells; Thin films; CdTe; Flexible solar cells; Space solar cells; Solar energy ARTICLE IN PRESS for Renewable Energy Systems and Technology), Department of Electronic and Electrical Engineering, Loughborough

  19. Durham Workshop, Dec 2005Durham Workshop, Dec 2005 Thin Film Metrology UsingThin Film Metrology Using

    E-Print Network [OSTI]

    Greenaway, Alan

    Durham Workshop, Dec 2005Durham Workshop, Dec 2005 Thin Film Metrology UsingThin Film Metrology Modelling to investigate level of aberrations introduced by thin film structure.introduced by thin film Solar Cells Reflectors Solar Cell Covers Security UV Protection Anti-static Gas Temperature Pressure

  20. Gateway:América Latina/Aprender más sobre las ERNC/Estudios...

    Open Energy Info (EERE)

    Analisis de Proyectos de Bomba de Calor con Fuente Geotermica Fuente: Leonardo Energy Idioma: Espaol Retrieved from "http:en.openei.orgwindex.php?titleGateway:AmricaLatin...

  1. U-225: Citrix Access Gateway Plug-in for Windows nsepacom ActiveX Control Vulnerabilities

    Broader source: Energy.gov [DOE]

    Two vulnerabilities in Citrix Access Gateway Plug-in for Windows can be exploited by malicious people to compromise a user's system.

  2. Solar collector

    SciTech Connect (OSTI)

    Wilhelm, W.G.

    1982-05-04

    The field of this invention is solar collectors, and more particularly, the invention pertains to a flat plate collector that employs high performance thin films. The solar collector of this invention overcomes several problems in this field, such as excessive hardware, cost and reliability, and other prior art drawbacks outlined in the specification. In the preferred form, the apparatus features a substantially rigid planar frame. A thin film window is bonded to one planar side of the frame. An absorber of laminate construction is comprised of two thin film layers that are sealed perimetrically. The layers define a fluid-tight planar envelope of large surface area to volume through which a heat transfer fluid flows. Absorber is bonded to the other planar side of the frame. The thin film construction of the absorber assures substantially full envelope wetting and thus good efficiency. The window and absorber films stress the frame adding to the overall strength of the collector.

  3. EE580 Solar Cells Todd J. Kaiser

    E-Print Network [OSTI]

    Kaiser, Todd J.

    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

  4. Use of 2nd and 3rd Level Correlation Analysis for Studying Degradation in Polycrystalline Thin-Film Solar Cells

    SciTech Connect (OSTI)

    Albin, D. S.; del Cueto, J. A.; Demtsu, S. H.; Bansal, S.

    2011-03-01

    The correlation of stress-induced changes in the performance of laboratory-made CdTe solar cells with various 2nd and 3rd level metrics is discussed. The overall behavior of aggregated data showing how cell efficiency changes as a function of open-circuit voltage (Voc), short-circuit current density (Jsc), and fill factor (FF) is explained using a two-diode, PSpice model in which degradation is simulated by systematically changing model parameters. FF shows the highest correlation with performance during stress, and is subsequently shown to be most affected by shunt resistance, recombination and in some cases voltage-dependent collection. Large decreases in Jsc as well as increasing rates of Voc degradation are related to voltage-dependent collection effects and catastrophic shunting respectively. Large decreases in Voc in the absence of catastrophic shunting are attributed to increased recombination. The relevance of capacitance-derived data correlated with both Voc and FF is discussed.

  5. Effect of Dual-Function Nano-Structured Silicon Oxide Thin Film on Multi-Junction Solar Cells

    SciTech Connect (OSTI)

    Yan, B.; Sivec, L.; Yue, G.; Jiang, C. S.; Yang, J.; Guha, S.

    2011-01-01

    We present our recent study of using nano-structured hydrogenated silicon oxide films (nc-SiO{sub x}:H) as a dual-function layer in multi-junction solar cells. The nc-SiO{sub x}:H films were deposited using very high frequency glow discharge of a SiH{sub 4} (or Si{sub 2}H{sub 6}), CO{sub 2}, PH{sub 3}, and H{sub 2} gas mixture. By optimizing deposition parameters, we obtained 'dual function' nc-SiO{sub x}:H material characterized by a conductivity suitable for use as an n layer and optical properties suitable for use as an inter-reflection layer. We tested the nc-SiO{sub x}:H by replacing the normal n-type material in the tunnel junction of a multi-junction structure. The advantage of the dual-function nc-SiO{sub x}:H layer is twofold; one is to simplify the cell structure, and the other is to reduce any optical loss associated with the inter-reflection layer. Quantum efficiency measurements show the gain in top cell current is equal to or greater than the loss in bottom cell current for a-Si:H/nc-Si:H structures. In addition, a thinner a-Si:H top cell with the nc-SiO{sub x}:H n layer improves the top-cell stability, thereby providing higher stabilized solar cell efficiency. We also used the dual-function layer between the middle and the bottom cells in a-Si:H/a-SiGe:H/nc-Si:H triple-junction structures. The gain in the middle cell current is {approx}1.0 mA/cm{sup 2}, leading to an initial active-area efficiency of 14.8%.

  6. Fabrication and Characterization of Organic Solar Cells

    E-Print Network [OSTI]

    Yengel, Emre

    2010-01-01

    Cu(InGa)Se-2 thin- film solar cells with ZnSe buffer layers.Stability of CdTe/CdS thin-film solar cells. Sol Energ MatThis so called ‘thin film’ solar cell technology was first

  7. Compilation of Expenditures for the Hawai`i Gateway Energy Center

    E-Print Network [OSTI]

    Compilation of Expenditures for the Hawai`i Gateway Energy Center Prepared for the U.S. Department;Compilation of Expenditures for the Hawai`i Gateway Energy Center 1.0 Introduction As part of the Hawai will be located more closely to the park activities. 3.0 Cost Summary The following is a compilation of the costs

  8. Psychological & Brain Sciences 10/2012 HOW TO PLACE AN ORDER IN GATEWAY

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    Psychological & Brain Sciences 10/2012 1 HOW TO PLACE AN ORDER IN GATEWAY 1) Go to the Gateway above). All items need to be from the same vendor. #12;Psychological & Brain Sciences 10/2012 2 c on the Cart in the upper right hand corner to view your items. #12;Psychological & Brain Sciences 10/2012 3

  9. RelateGateways: Using Spatial Context to Identify and Interact with Pervasive Services

    E-Print Network [OSTI]

    , UK 2 ETH Zurich / SAP Research, Switzerland 3 Ludwig-Maximilians-Universit¨at, M¨unchen, Germany displays, multimedia systems, worksta- tions, etc. While on the run we should be able to use the mobileGateways project extends the mobile desktop with a new kind of widget: the gateways. These com- ponents

  10. Towards an Industry Data Gateway: An Integrated Platform for the Analysis of Wind Turbine Data

    E-Print Network [OSTI]

    Towards an Industry Data Gateway: An Integrated Platform for the Analysis of Wind Turbine Data monitoring of sensor information from wind turbines, and how a data gateway can help to increase in the context of wind turbines. It goes on to describe the innovative approach used in VAVID to meet

  11. Impact of Gateways Placement on Clustering Algorithms in Wireless Mesh Networks

    E-Print Network [OSTI]

    Boutaba, Raouf

    .Anelli@univ-reunion.fr Abstract--In wireless mesh networks, designing algorithms that efficiently balance the traffic loads among as a result of its direct impact on the way routers are associated to gateways. In this paper, we investigate algorithms. We show that if bounds on the number of hops between routers and gateways exist, load

  12. The Internet of Things Has a Gateway Problem Thomas Zachariah, Noah Klugman, Bradford Campbell,

    E-Print Network [OSTI]

    Cafarella, Michael J.

    The Internet of Things Has a Gateway Problem Thomas Zachariah, Noah Klugman, Bradford Campbell,nklugman,bradjc,adkinsjd,nealjack,prabal}@umich.edu ABSTRACT The vision of an Internet of Things (IoT) has captured the imag- ination of the world and raised, Management, Performance, Standardiza- tion Keywords Internet of Things, Gateway, Mobile Phones, Bluetooth Low

  13. User:GregZiebold/Gateway test | Open Energy Information

    Open Energy Info (EERE)

    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| Open Energy Information Serbia-EnhancingEt Al.,Turin, New York:PowerNew York: Energy ResourcesCalpakGateway test <

  14. Gateway Energy Services Corporation (Maryland) | Open Energy Information

    Open Energy Info (EERE)

    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 QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEnia SpAFlexStock| Open EnergyGapminderTexas:GasConGateway

  15. Light trapping in plasmonic solar cells Albert Polman

    E-Print Network [OSTI]

    Polman, Albert

    light management team #12;Light is poorly absorbed in a thin-film solar cell Solar spectrum absorbed Management #12;Light trapping in a thin-film solar cell Nature Mater. 9, 205 (2010) #12;Back contact thin-film solar cell Optimum = closest packed Experiments so far Pitch (nm) Wavelength(nm) Photocurrent

  16. Predictive Modeling for Glass-Side Laser Scribing of Thin Film Photovoltaic Cells

    E-Print Network [OSTI]

    Yao, Y. Lawrence

    :F, CdTe, solar cell INTRODUCTION Thin-film solar cell is a promising technology to achieve substrates. Cadmium telluride (CdTe) is the dominant thin film solar cell material in recent years because manufacturing processes in the fabrication of thin film solar cells is monolithic cell isolation and series

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

    E-Print Network [OSTI]

    Sites, James R.

    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

  18. Polycrystalline thin-film cadmium telluride solar cells fabricated by electrodeposition. Annual subcontract report, 20 March 1992--19 March 1993

    SciTech Connect (OSTI)

    Trefny, J.U.; Furtak, T.E.; Wada, N.; Williamson, D.L.; Kim, D.

    1993-08-01

    This report describes progress during the first year of a 3-year program at Colorado School of Mines, based upon earlier studies performed by Ametek Corporation, to develop specific layers of the Ametek n-i-p structure as well as additional studies of several transparent conducting oxides. Thin films of ZnO and ZnO:Al were deposited under various conditions. For the n-layer of the Ametek structure, a dip-coating method was developed for the deposition of CdS films. The authors also present data on the characterization of these films by X-ray diffraction, Raman spectroscopy, scanning tunneling microscopy, small-angle X-ray scattering, and other techniques. They made progress in the electrodeposition of the CdTe i-layer of the Ametek structure. They developed appropriate electrochemical baths and are beginning to understand the role of the many experimental parameters that must be controlled to obtain high-quality films of this material. They explored the possibility of using an electrochemical process for fabricating the ZnTe p-layer. Some preliminary success was achieved, and this step will be pursued in the next phase. Finally, they fabricated a number of ``dot`` solar cells with the structure glass/SnO{sub 2}/CdS/CdTe/Au. Several cells with efficiencies in the range of 5%-6% were obtained, and they are confident, given recent progress, that cells with efficiencies in excess of 10% will be achieved in the near future.

  19. International Clean Energy Analysis Gateway: Assisting Developing Countries with Clean Energy Deployment (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-01-01

    The International Clean Energy Analysis Gateway seeks to enhance developing country access to energy efficiency and renewable energy analysis tools, databases, methods, and other technical resources in a dynamic user interaction environment. In addition to providing information on available tools, the gateway also is a platform for Web seminars, online training, peer networks, and expert assistance. The gateway is sponsored by the U.S. Department of Energy (DOE) and the United Nations Industrial Development Organization (UNIDO) and managed by the National Renewable Energy Laboratory (NREL). Further cooperation is desired with organizations that can help expand the information presented in the portal and assist with outreach and training.

  20. Structure of All-Polymer Solar Cells Impedes Efficiency

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

    Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic...

  1. Light Trapping, Absorption and Solar Energy Harvesting by Artificial...

    Office of Scientific and Technical Information (OSTI)

    Org: USDOE Country of Publication: United States Language: English Subject: 14 SOLAR ENERGY light-trapping, photonic crystals, high-efficiency thin-film solar cells Word Cloud...

  2. Webinar: 20K Hour GATEWAY Testing Results for I-35W Bridge

    Office of Energy Efficiency and Renewable Energy (EERE)

    The U.S. Department of Energy has released a GATEWAY Demonstration report on the longer-term performance of an LED lighting system that was installed on the I-35W Bridge in Minneapolis in September...

  3. Closing the gateways of democracy : cities and the militarization of protest policing

    E-Print Network [OSTI]

    Golan, Gan

    2005-01-01

    In the era of globalization, cities function as 'gateways of democracy,' the spaces and places where the civil society literally 'marches through' in order to deliver oppositional claims into the global arena. However, ...

  4. Manufacturing recovery : a networked approach to green job creation in Massachusetts Gateway cities

    E-Print Network [OSTI]

    Leavy-Sperounis, Marianna (Marianna Breakstone)

    2010-01-01

    In this thesis, I compare workforce development planning in Lawrence and Lowell, Massachusetts, two of the state's older industrial "Gateway" cities. I specifically examine local planning processes around job creation in ...

  5. Simulations of solar cell absorption enhancement using resonant modes

    E-Print Network [OSTI]

    Grandidier, Jonathan

    for enhancing the absorption of thin-film amorphous silicon solar cells using periodic arrangements of resonant,7 Dielectric nanospheres are promising structures for light trapping in planar, thin-film solar cells. It has a thin-film a-Si solar cell structure featuring back reflector and optimized anti-reflection coating. We

  6. Thin film photovoltaic device

    DOE Patents [OSTI]

    Catalano, A.W.; Bhushan, M.

    1982-08-03

    A thin film photovoltaic solar cell which utilizes a zinc phosphide semiconductor is of the homojunction type comprising an n-type conductivity region forming an electrical junction with a p-type region, both regions consisting essentially of the same semiconductor material. The n-type region is formed by treating zinc phosphide with an extrinsic dopant such as magnesium. The semiconductor is formed on a multilayer substrate which acts as an opaque contact. Various transparent contacts may be used, including a thin metal film of the same chemical composition as the n-type dopant or conductive oxides or metal grids. 5 figs.

  7. Thin film photovoltaic device

    DOE Patents [OSTI]

    Catalano, Anthony W. (Wilmington, DE); Bhushan, Manjul (Wilmington, DE)

    1982-01-01

    A thin film photovoltaic solar cell which utilizes a zinc phosphide semiconductor is of the homojunction type comprising an n-type conductivity region forming an electrical junction with a p-type region, both regions consisting essentially of the same semiconductor material. The n-type region is formed by treating zinc phosphide with an extrinsic dopant such as magnesium. The semiconductor is formed on a multilayer substrate which acts as an opaque contact. Various transparent contacts may be used, including a thin metal film of the same chemical composition as the n-type dopant or conductive oxides or metal grids.

  8. ENI Renewable and Non-conventional Energy Prize 2012 High-efficiency solar cells based on nanophotonic design

    E-Print Network [OSTI]

    Polman, Albert

    demonstrated ultra-thin silicon solar cells on glass, world-record efficiency thin-film GaAs solar cells to solar cell design are applicable to other solar cell technologies as well, including thin-film CuInSe2ENI Renewable and Non-conventional Energy Prize 2012 High-efficiency solar cells based

  9. Solar collector

    DOE Patents [OSTI]

    Wilhelm, William G. (Cutchogue, NY)

    1982-01-01

    The field of this invention is solar collectors, and more particularly, the invention pertains to a flat plate collector that employs high performance thin films. The solar collector of this invention overcomes several problems in this field, such as excessive hardware, cost and reliability, and other prior art drawbacks outlined in the specification. In the preferred form, the apparatus features a substantially rigid planar frame (14). A thin film window (42) is bonded to one planar side of the frame. An absorber (24) of laminate construction is comprised of two thin film layers (24a, 24b) that are sealed perimetrically. The layers (24a, 24b) define a fluid-tight planar envelope (24c) of large surface area to volume through which a heat transfer fluid flows. Absorber (24) is bonded to the other planar side of the frame. The thin film construction of the absorber assures substantially full envelope wetting and thus good efficiency. The window and absorber films stress the frame adding to the overall strength of the collector.

  10. Creating CZTS Thin Films Via Stacked Metallic CVD and Sulfurization

    E-Print Network [OSTI]

    Bielecki, Anthony

    2013-01-01

    Research, Thin-Film Photovoltaic (PV) Cells Market Analysiscost of photovoltaic systems (such as solar cells) due tosolar cells are created by depositing layers of photovoltaic

  11. TIS (Technology Information System): The Intelligent Gateway Processor (IGP)

    SciTech Connect (OSTI)

    Hampel, V.E.; Barker, R.; Berch, M.; Kawin, R.; Lann, N.; McGrogan, S.; Sharpe, N.; Winiger, G.

    1984-10-01

    The Technology Information System (TIS) is an Intelligent Gateway Processor (IGP) capable of interconnecting heterogeneous information resources at geographically distributed locations in an automated, unified, and controlled manner. It augments the capabilities of personal computers and workstations of scientists and engineers by providing a shared directory to worldwide bibliographic and numeric resources and a library of self-guided procedures by which test, data, and graphs can be downloaded, reformatted, aggregated, analyzed, and shared among users and different host machines. The TIS link capability is used routinely for transcontinental tutorials and as a proactical means for the audiovisual linking of TIS users with experts at their respective locations. The IGP universal user interface permits changes and additions of available resources while running non-stop. The TIS/IGP at th Lawrence Livermore National Laboratory (LLNL) serves as the host system for several different communities of users who develop integrated information systems for personal and shared programmatic resources. The TIS local area network utilizes a 10 Mbps Ethernet which serves as a testbed for high-technology hardware and software.

  12. Influence of Gas Flow Rate for Formation of Aligned Nanorods in ZnO Thin Films for Solar-Driven Hydrogen Production

    SciTech Connect (OSTI)

    Shet, S.; Chen, L.; Tang, H.; Nuggehalli, R.; Wang, H.; Yan, Y.; Turner, J.; Al-Jassim, M.

    2012-04-01

    ZnO thin films have been deposited in mixed Ar/N{sub 2} gas ambient at substrate temperature of 500 C by radiofrequency sputtering of ZnO targets. We find that an optimum N{sub 2}-to-Ar ratio in the deposition ambient promotes the formation of well-aligned nanorods. ZnO thin films grown in ambient with 25% N{sub 2} gas flow rate promoted nanorods aligned along c-axis and exhibit significantly enhanced photoelectrochemical (PEC) response, compared with ZnO thin films grown in an ambient with different N{sub 2}-to-Ar gas flow ratios. Our results suggest that chamber ambient is critical for the formation of aligned nanostructures, which offer potential advantages for improving the efficiency of PEC water splitting for H{sub 2} production.

  13. Atmospheric Pressure Chemical Vapor Deposition of High Silica SiO2-TiO2 Antireflective Thin Films for Glass Based Solar Panels

    SciTech Connect (OSTI)

    Klobukowski, Erik R; Tenhaeff, Wyatt E; McCamy, James; Harris, Caroline; Narula, Chaitanya Kumar

    2013-01-01

    The atmospheric pressure chemical vapor deposition (APCVD) of SiO2-TiO2 thin films employing [[(tBuO)3Si]2O-Ti(OiPr)2], which can be prepared from commercially available materials, results in antireflective thin films on float glass under industrially relevant manufacturing conditions. It was found that while the deposition temperature had an effect on the SiO2:TiO2 ratio, the thickness was dependent on the time of deposition. This study shows that it is possible to use APCVD employing a single source precursor containing titanium and silicon to produce thin films on float glass with high SiO2:TiO2 ratios.

  14. Project Profile: Development and Productization of High-Efficiency, Low-Cost Building-Integrated PV Shingles Using Monocrystalline Silicon Thin-Film Solar Cells

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Solexel-OC team is developing a BIPV roofing shingle product that includes low-profile solar modules and a unique attachment system that will be fastened directly to the roof and incorporates...

  15. Structural Integration of Silicon Solar Cells and Lithium-ion Batteries Using Printed Electronics

    E-Print Network [OSTI]

    Kang, Jin Sung

    2012-01-01

    of thin- film Li-ion batteries under flexural deflection,”thin-film solar cells and batteries (2) Characterizesolar cells and batteries for multifunctional performance (

  16. Semitransparent ultrathin CdTe solar cells Semitransparent ultrathin CdTe solar cells and durabilityand durability

    E-Print Network [OSTI]

    Rollins, Andrew M.

    Semitransparent ultrathin CdTe solar cells Semitransparent ultrathin CdTe solar cells lines · Thinfilm CIGS--not available in transparent form · Dye sensitized solar thin films· Dye.E. McCandless, W.A. Buchanan. "High throughput processing of CdTe/CdS solar cells with thin absorber

  17. Ames Lab 101: Improving Solar Cell Efficiency

    ScienceCinema (OSTI)

    Biswas, Rana

    2012-08-29

    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.

  18. Effects of Cu Diffusion from ZnTe:Cu/Ti Contacts on Carrier Lifetime of CdS/CdTe Thin Film Solar Cells: Preprint

    SciTech Connect (OSTI)

    Gessert, T. A.; Metzger, W. K.; Asher, S. E.; Young, M. R.; Johnston, S.; Dhere, R. G.; Duda, A.

    2008-05-01

    We study the performance of CdS/CdTe thin film PV devices processed with a ZnTe:Cu/Ti contact to investigate how carrier lifetime in the CdTe layer is affected by Cu diffusion from the contact.

  19. Advanced Materials and Nano Technology for Solar Cells

    E-Print Network [OSTI]

    Han, Tao

    2014-01-01

    http://rredc.nrel.gov/solar/spectra/am1.5/ASTMG173/ASTMG173.CdTe and CIGS thin-film solar cells: highlights and4.57) Eduardo Lorenzo (1994). Solar Electricity: Engineering

  20. Heterojunction solar cell

    DOE Patents [OSTI]

    Olson, Jerry M. (Lakewood, CO)

    1994-01-01

    A high-efficiency single 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. The conversion effiency 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. Heterojunction solar cell

    DOE Patents [OSTI]

    Olson, J.M.

    1994-08-30

    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.

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

    E-Print Network [OSTI]

    Miller, Owen Dennis

    2012-01-01

    method to a new solar cell design: a thin-film solar cell incharacterize and design next-generation solar cells. Chapterlies with optical design: The solar cell must be designed

  3. Fabrication and Characterization of Organic Solar Cells

    E-Print Network [OSTI]

    Yengel, Emre

    2010-01-01

    CdTe/CdS thin-film solar cells. Sol Energ Mat Sol C. 2000;p/n-junction solar cells. Sol Energ Mat Sol C. Wohrle D,

  4. Low work function, stable thin films

    DOE Patents [OSTI]

    Dinh, Long N. (Concord, CA); McLean, II, William (Oakland, CA); Balooch, Mehdi (Berkeley, CA); Fehring, Jr., Edward J. (Dublin, CA); Schildbach, Marcus A. (Livermore, CA)

    2000-01-01

    Generation of low work function, stable compound thin films by laser ablation. Compound thin films with low work function can be synthesized by simultaneously laser ablating silicon, for example, and thermal evaporating an alkali metal into an oxygen environment. For example, the compound thin film may be composed of Si/Cs/O. The work functions of the thin films can be varied by changing the silicon/alkali metal/oxygen ratio. Low work functions of the compound thin films deposited on silicon substrates were confirmed by ultraviolet photoelectron spectroscopy (UPS). The compound thin films are stable up to 500.degree. C. as measured by x-ray photoelectron spectroscopy (XPS). Tests have established that for certain chemical compositions and annealing temperatures of the compound thin films, negative electron affinity (NEA) was detected. The low work function, stable compound thin films can be utilized in solar cells, field emission flat panel displays, electron guns, and cold cathode electron guns.

  5. Influence of different sulfur to selenium ratios on the structural and electronic properties of Cu(In,Ga)(S,Se){sub 2} thin films and solar cells formed by the stacked elemental layer process

    SciTech Connect (OSTI)

    Mueller, B. J.; Zimmermann, C.; Haug, V. Koehler, T.; Zweigart, S.; Hergert, F.; Herr, U.

    2014-11-07

    In this study, we investigate the effect of different elemental selenium to elemental sulfur ratios on the chalcopyrite phase formation in Cu(In,Ga)(S,Se){sub 2} thin films. The films are formed by the stacked elemental layer process. The structural and electronic properties of the thin films and solar cells are analyzed by means of scanning electron microscopy, glow discharge optical emission spectrometry, X-ray diffraction, X-ray fluorescence, Raman spectroscopy, spectral photoluminescence as well as current-voltage, and quantum efficiency measurements. The influence of different S/(S+Se) ratios on the anion incorporation and on the Ga/In distribution is investigated. We find a homogenous sulfur concentration profile inside the film from the top surface to the bottom. External quantum efficiency measurements show that the band edge of the solar cell device is shifted to shorter wavelength, which enhances the open-circuit voltages. The relative increase of the open-circuit voltage with S/(S+Se) ratio is lower than expected from the band gap energy trend, which is attributed to the presence of S-induced defects. We also observe a linear decrease of the short-circuit current density with increasing S/(S+Se) ratio which can be explained by a reduced absorption. Above a critical S/(S+Se) ratio of around 0.61, the fill factor drops drastically, which is accompanied by a strong series resistance increase which may be attributed to changes in the back contact or p-n junction properties.

  6. ON BUILDING AN INTERNET GATEWAY FOR INTERNET TELEPHONY Cheng-Yue Chang and Ming-Syan Chen

    E-Print Network [OSTI]

    Hung, Shih-Hao

    ON BUILDING AN INTERNET GATEWAY FOR INTERNET TELEPHONY Cheng-Yue Chang and Ming-Syan Chen@arbor.ee.ntu.edu.tw; mschen@cc.ee.ntu.edu.tw ABSTRACT In recent years, the Internet has emerged as an important collaborative, it is very important to construct a PSTN/Internet gateway for further experiments and devel- opments

  7. Proc. of the 24th IEEE Photovoltaic Specialists Conference (IEEE, New York, 1995), pp. 291-294. ADMITTANCE MEASUREMENTS ON Cu(In,Ga)Se2 POLYCRYSTALLINE THIN-

    E-Print Network [OSTI]

    Scofield, John H.

    for approximately 30 CIS and CIGS polycrystalline thin film solar cells having efficiencies of 12% or better-294. ADMITTANCE MEASUREMENTS ON Cu(In,Ga)Se2 POLYCRYSTALLINE THIN- FILM SOLAR CELLS John H. Scofield Physics-16.4% efficient, 0.43 cm2 area, polycrystalline, thin-film solar cells solar cells from 16 different CuInSe2 (CIS

  8. Gateway:U.S. OpenLabs/Environmental and Economic Impacts | Open Energy

    Open Energy Info (EERE)

    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 QA:QAsource History View New PagesSustainable UrbanKentucky: EnergyGateway Edit History Gateway:LowInformation

  9. Thin films of mixed metal compounds

    DOE Patents [OSTI]

    Mickelsen, Reid A. (Bellevue, WA); Chen, Wen S. (Seattle, WA)

    1985-01-01

    A compositionally uniform thin film of a mixed metal compound is formed by simultaneously evaporating a first metal compound and a second metal compound from independent sources. The mean free path between the vapor particles is reduced by a gas and the mixed vapors are deposited uniformly. The invention finds particular utility in forming thin film heterojunction solar cells.

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

    E-Print Network [OSTI]

    Lin, Zhiqun

    120-750, Korea School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States # Department of Materials Science and Engineering, Iowa State University production due to their high solar energy conversion efficiency as well as relatively low fabrication cost.1

  11. Development of high-efficiency, thin-film CdTe solar cells. Final subcontract report, 1 February 1992--30 November 1995

    SciTech Connect (OSTI)

    Rohatgi, A.; Chou, H.C.; Kamra, S.; Bhat, A. [Georgia Inst. of Tech., Atlanta, GA (United States)

    1996-01-01

    This report describes work performed by the Georgia Institute of Technology (GIT) to bring the polycrystalline CdTe cell efficiency a step closer to the practically achievable efficiency of 18% through fundamental understanding of detects and loss mechanisms, the role of chemical and heat treatments, and investigation of now process techniques. The objective was addressed by a combination of in-depth characterization, modeling, materials growth, device fabrication, and `transport analyses of Au/Cu/CdTe/CdS/SnO {sub 2} glass front-wall heterojunction solar cells. GiT attempted to understand the loss mechanism(s) in each layer and interface by a step-by-step investigation of this multilayer cell structure. The first step was to understand, quantify, and reduce the reflectance and photocurrent loss in polycrystalline CdTe solar calls. The second step involved the investigation of detects and loss mechanisms associated with the CdTe layer and the CdTe/CdS interface. The third stop was to investigate the effect of chemical and heat treatments on CdTe films and cells. The fourth step was to achieve a better and reliable contact to CdTe solar cells by improving the fundamental understanding. Of the effects of Cu on cell efficiency. Finally, the research involved the investigation of the effect of crystallinity and grain boundaries on Cu incorporation in the CdTe films, including the fabrication of CdTe solar calls with larger CdTe grain size.

  12. EFFECT OF HYDROGEN ON SURFACE TEXTURING AND CRYSTALLIZATION ON A-SI:H THIN FILM IRRADIATED BY EXCIMER LASER

    E-Print Network [OSTI]

    Yao, Y. Lawrence

    -Si:H thin film solar cell applications. Introduction Many industrial solar cells in use today use bulk and instability, thin-film a- Si:H solar cells require a highly efficient light-trapping design to absorb cell applications. In this study, hydrogenated and dehydrogenated amorphous silicon thin films

  13. A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    solar-electric system (typical for thin-film panels currently) plus a 58% efficient solar-thermal system (flat-plate efficiency

  14. Gateway:Coordinated Low Emissions Assistance Network (CLEAN) | Open Energy

    Open Energy Info (EERE)

    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 QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavy ElectricalsFTL SolarGate Solar Jump to: navigation, search

  15. Gateway:Coordinated Low Emissions Assistance Network (CLEAN) | Open Energy

    Open Energy Info (EERE)

    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 QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavy ElectricalsFTL SolarGate Solar Jump to: navigation,

  16. Modeling and simulation of CuIn{sub 1?x}Ga{sub x}Se{sub 2} based thin film solar cell

    SciTech Connect (OSTI)

    Kumari, S., E-mail: sarita.kumari132@gmail.com; Verma, A. S. [Department of Physics, Banasthali University, Rajasthan-304022 (India); Singh, P.; Gautam, R. [Department of Electronics and Communication, Krishna Institute of Engg. and Tech., Ghaziabad-201206 (India)

    2014-04-24

    In this work, CIGS (Copper Indium Gallium Diselenide) based solar cell structure has been simulated. We have been calculated short circuit current, open circuit voltage and efficiency of the cell. The thickness of the absorption layer is varied from 400 to 3000 nm, keeping the thickness of other layers unchanged. The effect of absorption layer thickness over cell performance has been analyzed and found that the efficiency increases upto 22% until the thickness of the absorption layer reaches around 2000 nm.

  17. Gateway Adaptive Pacing for TCP across Multihop Wireless Networks and the Internet*

    E-Print Network [OSTI]

    Lindemann, Christoph

    Gateway Adaptive Pacing for TCP across Multihop Wireless Networks and the Internet* Sherif M. El introduce an effective congestion control scheme for TCP over hybrid wireless/wired networks comprising a multihop wireless IEEE 802.11 network and the wired Internet. We propose an adaptive pacing scheme

  18. Interconnecting WiFi Devices with IEEE 802.15.4 Devices without Using a Gateway

    E-Print Network [OSTI]

    Gnawali, Omprakash

    to bridge between the low power IEEE 802.15.4 network and the Internet. The bridge has at least two at a smart home, the user may use a smartphone and send command over WiFi to the gateway, often through smart home automation applications are non-interactive. Yet, they require Internet access either

  19. GATEWAY Demonstrations: Trial Demonstration of Area Lighting Retrofit, Yuma Border Patrol, Yuma, Arizona

    SciTech Connect (OSTI)

    Wilkerson, A. M.; McCullough, J. J.

    2014-12-31

    Along the Yuma Sector Border Patrol Area in Yuma, Arizona, the GATEWAY program conducted a trial demonstration in which the incumbent quartz metal halide area lighting was replaced with LED at three pole locations at the Yuma Sector Border Patrol Area in Yuma, Arizona. The retrofit was documented to better understand LED technology performance in high-temperature environments.

  20. IEEE Wireless Communications February 200630 1536-1284/06/$20.00 2006 IEEE Gateway router

    E-Print Network [OSTI]

    Jiang, Hai

    IEEE Wireless Communications · February 200630 1536-1284/06/$20.00 © 2006 IEEE Gateway router-exempt 2.4 GHz industri- al, scientific, and medical (ISM) frequency band, the IEEE 802.11b WLAN offers a data rate up to 11 Mb/s, while IEEE 802.11a WLAN and European Telecommunications Standard Insti- tute

  1. Compilation of Expenditures for the Hawai`i Gateway Energy Center

    E-Print Network [OSTI]

    `i Distributed Energy Resource Technologies for Energy Security Subtask 2.2 Deliverable #3 By Hawai`i Natural`i Distributed Energy Resource Technologies for Energy Security project, the Hawai`i Natural Energy InstituteCompilation of Expenditures for the Hawai`i Gateway Energy Center Prepared for the U.S. Department

  2. An SNMP Gateway for Delay/Disruption Tolerant Network Management GREGORY L. CAMPBELL

    E-Print Network [OSTI]

    Kruse, Hans

    is tested by creating a sample terrestrial management system and by mimicking interaction with the DING protocol. The results prove that a push-based data collection method that populates a shared database canAn SNMP Gateway for Delay/Disruption Tolerant Network Management by GREGORY L. CAMPBELL Mc

  3. U-244: McAfee Email Gateway Lets Remote Users Bypass Authentication...

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

    McAfee Email Gateway (MEG) 7.0.0 and 7.0.1 (MEG 6.7.x is NOT affected.) McAfee Email and Web Security (EWS) 5.6 Patch 3 and earlier McAfee Email and Web Security (EWS) 5.5 Patch 6...

  4. The University of Oklahoma 2011-2012 Graduate College Bulletin GRADUATE GATEWAY EMBLEM BY HADLEY JERMAN

    E-Print Network [OSTI]

    Forester, Max

    #12;The University of Oklahoma 2011-2012 Graduate College Bulletin Page | 1 GRADUATE GATEWAY EMBLEM BY HADLEY JERMAN Ms. Jerman graduated from the School of Art and Art History at the University of Oklahoma and was an Oklahoma State Regents Scholar and member of OU's Joe C. and Carole Kerr McClendon Honors College. While

  5. Transparent Flow Migration through Splicing for Multi-homed Vehicular Internet Gateways

    E-Print Network [OSTI]

    Banerjee, Suman

    Transparent Flow Migration through Splicing for Multi-homed Vehicular Internet Gateways Joshua Hare for the contents of the interrupted flow and splice them back to the original flow in a manner that is transparent round trip times for more than 93% of the traffic volume. Clients left to their own mechanisms would

  6. DISSERTATION ANTICIPATED PERFORMANCE OF Cu(In,Ga)Se2 SOLAR CELLS IN THE

    E-Print Network [OSTI]

    Sites, James R.

    i DISSERTATION ANTICIPATED PERFORMANCE OF Cu(In,Ga)Se2 SOLAR CELLS IN THE THIN-FILM LIMIT Submitted ENTITLED `ANTICIPATED PERFORMANCE OF Cu(In,Ga)Se2 SOLAR CELLS IN THE THIN-FILM LIMIT' BE ACCEPTED(In,Ga)Se2 SOLAR CELLS IN THE THIN-FILM LIMIT The demand for alternative sources of energy is rapidly

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

    E-Print Network [OSTI]

    Armstrong, Paul Barber

    2010-01-01

    information in hand, thin film solar cells (glass/ITO/PEDOT:in the zoom-in. Thin film solar cells (glass/ITO/PEDOT:PSS/thin film absorbance, are 1.50 eV for both polymers, close to the ideal value for a single layer solar cell.

  8. InGaAsP/InP intrastep quantum wells for enhanced solar energy conversion

    E-Print Network [OSTI]

    Chen, Winnie Victoria

    2012-01-01

    Y. Hioki, “Ceramic Thin Film CdTe Solar Cell,” Jpn. J. Appl.Thin-film CuInSe 2 /CdS heterojunction solar cells,” Appl.the first thin-film amorphous Si solar cells in 1976 [7

  9. Simulations of solar cell absorption enhancement using resonant modes of a nanosphere array

    E-Print Network [OSTI]

    Grandidier, Jonathan

    an approach for enhancing the absorption of thin-film amorphous silicon solar cells using periodic for light trapping in planar thin-film solar cells. It has recently been shown that freely propagating finite difference time domain (FDTD) simulations of a nanosphere array above a thin-film a-Si solar cell

  10. Impact of solid-phase crystallization of amorphous silicon on the chemical structure of the buried Si/ZnO thin film solar cell interface

    SciTech Connect (OSTI)

    Bar, M.; Wimmer, M.; Wilks, R. G.; Roczen, M.; Gerlach, D.; Ruske, F.; Lips, K.; Rech, B.; Weinhardt, L.; Blum, M.; Pookpanratana, S.; Krause, S.; Zhang, Y.; Heske, C.; Yang, W.; Denlinger, J. D.

    2010-04-30

    The chemical interface structure between phosphorus-doped hydrogenated amorphous silicon and aluminum-doped zinc oxide thin films is investigated with soft x-ray emission spectroscopy (XES) before and after solid-phase crystallization (SPC) at 600C. In addition to the expected SPC-induced phase transition from amorphous to polycrystalline silicon, our XES data indicates a pronounced chemical interaction at the buried Si/ZnO interface. In particular, we find an SPC-enhanced formation of Si-O bonds and the accumulation of Zn in close proximity to the interface. For an assumed closed and homogeneous SiO2 interlayer, an effective thickness of (5+2)nm after SPC could be estimated.

  11. Solar Energy Materials & Solar Cells 75 (2003) 307312 Extreme radiation hardness and light-weighted

    E-Print Network [OSTI]

    Woodall, Jerry M.

    2003-01-01

    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

  12. [Type here] Copper Indium Selenide (CIS) Solar Cell

    E-Print Network [OSTI]

    Hochberg, Michael

    [Type here] Copper Indium Selenide (CIS) Solar Cell CIS cells are made with a thin layer of CuInSe2) Solar Cell CIGs cells are made with a thin layer of copper indium gallium diselenide Cu(In, Ga)Se2 (CIGS). CIGS cells have up to 10% efficiency with similar durability as silicon solar cells. Since

  13. DOE Tribal Leader Solar Energy Forum - Agenda | 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 Rank EERE:FinancingPetroleum Based| Department8, 2015 GATEWAY Takes onandField||TransfersLeader Solar Energy

  14. High-Rate Fabrication of a-Si-Based Thin-Film Solar Cells Using Large-Area VHF PECVD Processes

    SciTech Connect (OSTI)

    Deng, Xunming; Fan, Qi Hua

    2011-12-31

    The University of Toledo (UT), working in concert with it’s a-Si-based PV industry partner Xunlight Corporation (Xunlight), has conducted a comprehensive study to develop a large-area (3ft x 3ft) VHF PECVD system for high rate uniform fabrication of silicon absorber layers, and the large-area VHF PECVD processes to achieve high performance a-Si/a-SiGe or a-Si/nc-Si tandem junction solar cells during the period of July 1, 2008 to Dec. 31, 2011, under DOE Award No. DE-FG36-08GO18073. The project had two primary goals: (i) to develop and improve a large area (3 ft × 3 ft) VHF PECVD system for high rate fabrication of > = 8 Å/s a-Si and >= 20 Å/s nc-Si or 4 Å/s a-SiGe absorber layers with high uniformity in film thicknesses and in material structures. (ii) to develop and optimize the large-area VHF PECVD processes to achieve high-performance a-Si/nc-Si or a-Si/a-SiGe tandem-junction solar cells with >= 10% stable efficiency. Our work has met the goals and is summarized in “Accomplishments versus goals and objectives”.

  15. The impact of oxygen incorporation during intrinsic ZnO sputtering on the performance of Cu(In,Ga)Se{sub 2} thin film solar cells

    SciTech Connect (OSTI)

    Lee, Kkotnim; Ok, Eun-A; Park, Jong-Keuk; Kim, Won Mok; Baik, Young-Joon; Jeong, Jeung-hyun; Kim, Donghwan

    2014-08-25

    We investigated the impact of incorporating 2% oxygen during intrinsic ZnO sputtering on the efficiency of Cu(In,Ga)Se{sub 2} solar cells. The added oxygen not only reduced the optical absorption loss of the Al-doped ZnO overlaying layer but also improved the electronic properties of the underlying CdS/Cu(In,Ga)Se{sub 2} by increasing carrier density, lowering defect level, and increasing diffusion length, eventually enhancing J{sub SC}, V{sub OC}, and fill factor. It was found that the Na doping concentration was significantly increased around the CdS/Cu(In,Ga)Se{sub 2} junction due to the plasma-activated oxygen. The improved electronic properties are better explained by the increased Na concentration than simply the oxygen-related defect passivation.

  16. Solar Chemical Peculiarities?

    E-Print Network [OSTI]

    Carlos Allende Prieto

    2006-12-08

    Several investigations of FGK stars in the solar neighborhood have suggested that thin-disk stars with an iron abundance similar to the Sun appear to show higher abundances of other elements, such as silicon, titanium, or nickel. Offsets could arise if the samples contain stars with ages, mean galactocentric distances, or kinematics, that differ on average from the solar values. They could also arise due to systematic errors in the abundance determinations, if the samples contain stars that are different from the Sun regarding their atmospheric parameters. We re-examine this issue by studying a sample of 80 nearby stars with solar-like colors and luminosities. Among these solar "analogs", the objects with solar iron abundances exhibit solar abundances of carbon, silicon, calcium, titanium and nickel.

  17. Global Science Gateway Agreement Signed in London | Department of Energy

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

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPLforLDRD Report11, SolarMat 4" |a,-DepartmentMarkedDepartment ofDOE

  18. Global Science Gateway Now Open | Department of Energy

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

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPLforLDRD Report11, SolarMat 4" |a,-DepartmentMarkedDepartment

  19. SOLAR CELLS FABRICATED WTH CuInS2 FILMS DEPOSITED USING SINGLE-SOURCE PRECURSORS Michael H. Jin1,3

    E-Print Network [OSTI]

    Scofield, John H.

    report a chalcopyrite thin film solar cell fabrication process established at NASA Glenn Research Center benefit of enabling roll-to-roll processing [3]. The first major thin film solar cell was the "CdS solar, however, remain below 15 % [8]. Several groups have attempted to fabricate thin film solar cells on metal

  20. Solar collection

    SciTech Connect (OSTI)

    Cole, S.L.

    1984-08-01

    This report contains summaries and pictures of projects funded by the Appropriate Technology Small Grants Program which include the following solar technologies: solar dish; photovoltaics; passive solar building and solar hot water system; Trombe wall; hot air panel; hybrid solar heating system; solar grain dryer; solar greenhouse; solar hot water workshops; and solar workshops.

  1. Baker-Barry Tunnel Lighting: Evaluation of a Potential GATEWAY Demonstrations Project

    SciTech Connect (OSTI)

    Tuenge, Jason R.

    2011-06-01

    The U.S. Department of Energy (DOE) is evaluating the Baker-Barry Tunnel as a potential GATEWAY Demonstrations project for deployment of solid-state lighting (SSL) technology. The National Park Service (NPS) views this project as a possible proving ground and template for implementation of light-emitting diode (LED) luminaires in other NPS tunnels, thereby expanding the estimated 40% energy savings from 132 MWh/yr for this tunnel to a much larger figure national

  2. 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,...

  3. Silicon Ink Technology Offers Path to Higher Efficiency Solar...

    Office of Environmental Management (EM)

    analysis. Partnering with National Labs Brings Cutting Edge Technology to Market Thin film solar panels produced by General Electric's PrimeStar in Arvada, Colorado | Image...

  4. AEROSPACE TECHNOLOGY REVIEW FOR LBL WINDOW/PASSIVE SOLAR PROGRAM FINAL REPORT

    E-Print Network [OSTI]

    Viswanathan, R.

    2011-01-01

    of Collectors of Thermal Solar Energy A Flat Plate Collectorsts of Collectors of Solar Thermal Energy, A Steel Flat Platof Thin Film, Solar Thermal Energy Converters", N7728613, PB

  5. Theory of Current Transients in Planar Semiconductor Devices: Insights and Applications to Organic Solar Cells

    E-Print Network [OSTI]

    Hawks, SA; Finck, BY; Schwartz, BJ

    2015-01-01

    impurity level for organic solar cells: Enhanced first-orderbulk heterojunction solar cells, Adv. Funct. Mater. 21,shunt leakage in thin-film solar cells, J. Appl. Phys. 108,

  6. AEROSPACE TECHNOLOGY REVIEW FOR LBL WINDOW/PASSIVE SOLAR PROGRAM FINAL REPORT

    E-Print Network [OSTI]

    Viswanathan, R.

    2011-01-01

    sts of Collectors of Solar Thermal Energy, A Steel Flat Platof Thin Film, Solar Thermal Energy Converters", N7728613, PBcharacteristics a solar thermal energy utili ng water l1ed

  7. (Melanin-Sensitized Solar Cell) : 696220016

    E-Print Network [OSTI]

    platinum thin film for counter-electrode, uses solar simulator to measure efficiency at AM 1.5 (100 mW/cm2 (Melanin-Sensitized Solar Cell) : : : 696220016 #12; #12;#12; #12;I PLD the majority dye-sensitized solar cell research all uses the Ruthenium-complex as a light harvester

  8. The Impact of City-level Permitting Processes on Residential Photovoltaic Installation Prices and Development Times: An Empirical Analysis of Solar Systems in California Cities

    E-Print Network [OSTI]

    Wiser, Ryan

    2014-01-01

    J.M. 2011. “A review of solar photovoltaic levelized cost ofof Small-Scale PV Systems. Solar America Board for Codes andexperience for thin-film solar modules: First Solar, Inc.

  9. China Singyes Solar Technologies Holdings Ltd formerly known...

    Open Energy Info (EERE)

    Singyes is a curtain wall engineering company that has partnered with Solar Thin Films to build solar module capacity in China for the domestic BIPV market. Coordinates: 22.277,...

  10. Loan Guarantees for Three California PV Solar Plants Expected...

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

    Tempe, Arizona, is sponsoring all three projects and will supply them with Cd-Te thin film solar PV modules -- also known as solar panels -- from a new Mesa, Arizona,...

  11. Amorphous Si Thin Film Based Photocathodes with High Photovoltage for Efficient Hydrogen Production

    E-Print Network [OSTI]

    Javey, Ali

    Amorphous Si Thin Film Based Photocathodes with High Photovoltage for Efficient Hydrogen Production for solar hydrogen production. With platinum as prototypical cocatalyst, a photocurrent onset potential of 0 for solar hydrogen production. KEYWORDS: Water splitting, hydrogen production, photochemistry, high

  12. Microstructured surface design for omnidirectional antireflection coatings on solar cells

    E-Print Network [OSTI]

    Zhou, Weidong

    Microstructured surface design for omnidirectional antireflection coatings on solar cells Weidong to current crystalline silicon solar cells, as well as future thin film, quantum dot, and organic solar cells for light collection is vital in achieving high performance solar cells.1 An ideal antireflec- tion AR

  13. Atomic layer deposition of Zn(O,S) thin films with tunable electrical properties by oxygen annealing

    E-Print Network [OSTI]

    properties to further improve the performance of thin-film solar cells using earth- abundant and non) is one of the most reliable materials used in thin-film solar cells, but currently the most efficient CIGS-based solar cells use CdS,1,2 a toxic material, as an n-type buffer layer between the p-type CIGS

  14. Antimony-Doped Tin(II) Sulfide Thin Films

    E-Print Network [OSTI]

    Chakraborty, Rupak

    Thin-film solar cells made from earth-abundant, inexpensive, and nontoxic materials are needed to replace the current technologies whose widespread use is limited by their use of scarce, costly, and toxic elements. Tin ...

  15. Growth of nano-and microcrystalline silicon thin films at low temperature by pulsed electron deposition

    E-Print Network [OSTI]

    Zexian, Cao

    in a multi-junction design [4]. The solar cells based on nanocrystalline silicon (nc-Si) films have now in electronic and optoelectronic devices, particularly in the fabrication of solar cells. Noticeably, thin-film silicon solar cells take a larger market share than the single- and polycrystalline silicon solar cells

  16. Enhanced optical absorption in nanopatterned silicon thin films with a nano-cone-hole

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    .6845, 040.5350. The silicon solar cell is presently dominating the solar cell market, owing to its abundant supply, nearly ideal band gap, and mature fabrication process. Most commer- cial silicon solar cells is consumed, leading to a higher cost for the final product [1]. The thin film silicon solar cell

  17. The role of gateways in the evolution of temperature and salinity of semi-enclosed basins: An oceanic box model for the Miocene Mediterranean Sea and Paratethys

    E-Print Network [OSTI]

    Utrecht, Universiteit

    . Our analysis forms a novel way of linking tectonics, climate and basin evolution. We investigate. Introduction Marine gateways play a crucial role in the exchange of water, heat and salt between ocean basins. Tectonically induced changes in gateway geometry can alter ocean circulation and heat transport, which in turn

  18. 20K Hour GATEWAY Testing Results for I-35W Bridge Webinar

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy released a GATEWAY Demonstration report on the longer-term performance of an LED lighting system that was installed on the I-35W Bridge in Minneapolis in September 2008 and represents one of the country’s oldest continuously operated exterior LED lighting installations. Prior to installation, two of the LED luminaires were tested, along with a third luminaire that was not installed on the bridge but was tested for 6,000 hours in a laboratory for comparison purposes.

  19. Organic Tandem Solar Cells: Design and Formation

    E-Print Network [OSTI]

    Chen, Chun-Chao

    2015-01-01

    by device optimization, ” Advanced Materials, 2010, 22(39),Optimization of ultra-thin light absorbing layer and transparent cathode architecture,” Advanced Energy Materials,optimization of diketopyrrolopyrrole?based narrow bandgap polymer solar cells‘‘, Advanced Materials,

  20. Enhancing solar cells with plasmonic nanovoids

    E-Print Network [OSTI]

    Lal, Niraj Narsey

    2012-07-03

    This thesis explores the use of plasmonic nanovoids for enhancing the efficiency of thin-film solar cells. Devices are fabricated inside plasmonically resonant nanostructures, demonstrating a new class of plasmonic photovoltaics. Novel cell...

  1. Signet Solar Inc | Open Energy Information

    Open Energy Info (EERE)

    Alto, California Zip: 94306 Product: US-based manufacturer of amorphous silicon thin-film modules. References: Signet Solar Inc1 This article is a stub. You can help OpenEI by...

  2. Solar cell array interconnects

    DOE Patents [OSTI]

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

    1995-11-14

    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.

  3. Solar cell array interconnects

    DOE Patents [OSTI]

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

    1995-01-01

    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.

  4. Gateway:América Latina/Aprender más sobre las ERNC/Seleccion...

    Open Energy Info (EERE)

    Ingls Trmica Solar Resource Monitoring Using Satellite Data Fuente: Leonardo Energy Idioma: Ingls Assesing Solar Resource for CSP plants Fuente: Leonardo Energy Idioma:...

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

    SciTech Connect (OSTI)

    Atwater, Harry

    2012-04-30

    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.

  6. Solar Energy Materials 14 (1986) 269-287 269 North-Holland, Amsterdam

    E-Print Network [OSTI]

    Brinker, C. Jeffrey

    1986-01-01

    Solar Energy Materials 14 (1986) 269-287 269 North-Holland, Amsterdam USE OF SOL-GEL THIN FILMS IN SOLAR ENERGY APPLICATIONS * R.B. PETTIT and C.J. BRINKER Sandia National Laboratories, Albuquerque, New. The use of sol-gel thin films in four solar energy materials applications is discussed: 1. Encapsulation

  7. Substrate for thin silicon solar cells

    DOE Patents [OSTI]

    Ciszek, Theodore F. (Evergreen, CO)

    1998-01-01

    A substrate for a photovoltaic device wherein the substrate is the base upon which photosensitive material is to be grown and the substrate comprises an alloy having boron in a range from 0.1 atomic % of the alloy to 1.3 atomic % of the alloy and the substrate has a resistivity less than 3.times.10.sup.-3 ohm-cm.

  8. Substrate for thin silicon solar cells

    DOE Patents [OSTI]

    Ciszek, T.F.

    1998-07-28

    A substrate is described for a photovoltaic device wherein the substrate is the base upon which photosensitive material is to be grown and the substrate comprises an alloy having boron in a range from 0.1 atomic % of the alloy to 1.3 atomic % of the alloy and the substrate has a resistivity less than 3{times}10{sup {minus}3} ohm-cm. 4 figs.

  9. Enabling Thin Silicon Solar Cell Technology

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES ScienceInformation CompanyEmployeeJonHere »Argonne

  10. Solar Thin Power | Open Energy Information

    Open Energy Info (EERE)

    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 QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS ReportEurope GmbH JumpSloughInfra Inc JumpSentry

  11. Hexagon solar power panel

    DOE Patents [OSTI]

    Rubin, Irwin (Oxnard, CA)

    1978-01-01

    A solar energy panel comprises a support upon which silicon cells are arrayed. The cells are wafer thin and of two geometrical types, both of the same area and electrical rating, namely hexagon cells and hourglass cells. The hourglass cells are composites of half hexagons. A near perfect nesting relationship of the cells achieves a high density packing whereby optimum energy production per panel area is achieved.

  12. GATEWAY ENTERPRISES

    Office of Legacy Management (LM)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and700, 1.Reports1E~ S·D3 2,000 4,000DOEK IGENERALC

  13. ULTRA-LIGHTWEIGHT AMORPHOUS SILICON SOLAR CELLS DEPOSITED OIN 7.5pn-1 THICK STAINLESS STEEL SUBSTRATES

    E-Print Network [OSTI]

    Deng, Xunming

    ULTRA-LIGHTWEIGHT AMORPHOUS SILICON SOLAR CELLS DEPOSITED OIN 7.5pn-1 THICK STAINLESS STEEL specific power for space application, we deposited a-Si thin film solar cells on ultra-thin stainless steel-thin stainless steel (SS) substrates (down to 7.5 pm) for space power applications. In this paper, we report our

  14. Plasmonic solar cells K.R. Catchpole,1,2*

    E-Print Network [OSTI]

    Polman, Albert

    Plasmonic solar cells K.R. Catchpole,1,2* and A. Polman,1 1 FOM Institute for Atomic and Molecular of increasing the light absorption in thin-film solar cells. Enhancements in photocurrent have been observed for a wide range of semiconductors and solar cell configurations. We review experimental and theoretical

  15. Cardiff University Distinguished Lecture Symposium Advances in Solar Energy

    E-Print Network [OSTI]

    Martin, Ralph R.

    Cardiff University Distinguished Lecture Symposium Advances in Solar Energy Thursday 22nd March prospects for inorganic thin film photovoltaic solar cells for large scale energy generation 2:55 Dr Emyr:50 Professor James Durrant (Imperial College London, England) Photochemical approaches to solar energy

  16. Solar cell efficiency enhancement via light trapping in printable resonant

    E-Print Network [OSTI]

    Grandidier, Jonathan

    Solar cell efficiency enhancement via light trapping in printable resonant dielectric nanosphere, photovoltaics, resonant dielectric structures, solar cells * Corresponding author: e-mail jgrandid for addressing the key challenge of light trapping in thin-film solar cells. We experimentally and theoretically

  17. Solar: An Open Platform for Context-Aware Mobile Applications

    E-Print Network [OSTI]

    Kotz, David

    Solar: An Open Platform for Context-Aware Mobile Applications Guanling Chen and David Kotz Dept the user state and the physical and computational environ- ment in which they run. Solar is a middleware into the in- frastructure, Solar allows applications to run on thin mo- bile clients more effectively

  18. FMEA for Solar Cell Array DATE 23 Jan, 1969

    E-Print Network [OSTI]

    Rathbun, Julie A.

    " .- Astronaut Handle Central Station ·~ Solar Panel Deployment Linkage Eas~ ALSEPAXES z Carrying Handle Antenna Positioning Mechanism Antenna Mast _ Outboard Solar Panel "B" PSEP Deployed Configuration N'"CJtx w Pl >!'...t. 3 15 PAGE OF DATE 23 Jan. 1969 The solar panels are assembled by bonding a thin sheet of G-1 0 glass

  19. Metasurface Broadband Solar Absorber

    E-Print Network [OSTI]

    Azad, A K; Sykora, M; Weisse-Bernstein, N R; Luk, T S; Taylor, A J; Dalvit, D A R; Chen, H -T

    2015-01-01

    We demonstrate a broadband, polarization independent, omnidirectional absorber based on a metallic metasurface architecture, which accomplishes greater than 90% absorptance in the visible and near-infrared range of the solar spectrum, and exhibits low emissivity at mid- and far-infrared wavelengths. The complex unit cell of the metasurface solar absorber consists of eight pairs of gold nano-resonators that are separated from a gold ground plane by a thin silicon dioxide spacer. Our experimental measurements reveal high-performance absorption over a wide range of incidence angles for both s- and p-polarizations. We also investigate numerically the frequency-dependent field and current distributions to elucidate how the absorption occurs within the metasurface structure. Furthermore, we discuss the potential use of our metasurface absorber design in solar thermophotovoltaics by exploiting refractory plasmonic materials.

  20. Approaches To Integrating A HIgh Penertration Of Solar PV and CPV Onto The Electrical Grid

    E-Print Network [OSTI]

    Hill, Steven Craig

    2013-01-01

    focused systems, multi-junction solar cells are needed whichSolar cells to be used in the CPV system can be single junction silicon cells, thin films or multi-

  1. The Ohio State University Readies for its Encore at the Solar...

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

    in the entire history of Solar Decathlon to have a roof covered entirely in thin film solar cells. Walter explained that since the competition's limits on roof size were...

  2. Gateway clone primer design The proper design of attB-attached primer is a crucial point for the BP and LR reaction of

    E-Print Network [OSTI]

    Lamitina, Todd

    Gateway clone primer design The proper design of attB-attached primer is a crucial point for the BP. Green: is the the nucleotide(s) added to keep the sequence in the right reading frame. You can change

  3. Introducing Perovskite Solar Cells to Undergraduates In this Viewpoint, we show that it is sufficiently easy and

    E-Print Network [OSTI]

    solar cells based on GaAs (gallium arsenide) single crystals are 29 and over 40% efficient in single 2 decades, solar cells based on thin-film polycrystalline materials, especially CdTe (cadmium. The experiment is suitable for chemistry students to learn about thin-film polycrystalline solar cells, energy

  4. Community Shared Solar with Solarize

    Office of Energy Efficiency and Renewable Energy (EERE)

    An overview of the concept behind The Solarize Guidebook, which offers neighborhoods a plan for getting volume discounts when making group purchases of rooftop solar energy systems.

  5. Solar Thermal Powered Evaporators

    E-Print Network [OSTI]

    Moe, Christian Robert

    2015-01-01

    Solar Thermal Collectors .is solar energy. Solar thermal collector arrays can be usedon integrating solar thermal collectors with desalination

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

    E-Print Network [OSTI]

    Venkataraman, Dhandapani "DV"

    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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    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

  8. innovati nNREL Designs Promising New Oxides for Solar Cells

    E-Print Network [OSTI]

    innovati nNREL Designs Promising New Oxides for Solar Cells High-efficiency, thin-film solar cells material. The upper TCO contact in a solar cell allows light to reach the absorber material below, which by the TCO to an external circuit, forming the negative terminal of the solar cell. TCOs used in this fashion

  9. Nanocrystal Solar Cells

    SciTech Connect (OSTI)

    Gur, Ilan

    2006-12-15

    This dissertation presents the results of a research agenda aimed at improving integration and stability in nanocrystal-based solar cells through advances in active materials and device architectures. The introduction of 3-dimensional nanocrystals illustrates the potential for improving transport and percolation in hybrid solar cells and enables novel fabrication methods for optimizing integration in these systems. Fabricating cells by sequential deposition allows for solution-based assembly of hybrid composites with controlled and well-characterized dispersion and electrode contact. Hyperbranched nanocrystals emerge as a nearly ideal building block for hybrid cells, allowing the controlled morphologies targeted by templated approaches to be achieved in an easily fabricated solution-cast device. In addition to offering practical benefits to device processing, these approaches offer fundamental insight into the operation of hybrid solar cells, shedding light on key phenomena such as the roles of electrode-contact and percolation behavior in these cells. Finally, all-inorganic nanocrystal solar cells are presented as a wholly new cell concept, illustrating that donor-acceptor charge transfer and directed carrier diffusion can be utilized in a system with no organic components, and that nanocrystals may act as building blocks for efficient, stable, and low-cost thin-film solar cells.

  10. The research field of thin-film photovoltaics of the department of energy-and semiconductor research (EHF) of the institute of physics at the Carl-von-Ossietzky University of Oldenburg

    E-Print Network [OSTI]

    Peinke, Joachim

    The research field of thin-film photovoltaics of the department of energy- and semiconductor and calibration of an optical simulation for thin-film solar cells In recent years, the photovoltaic has become is necessary to let photovoltaic remain economical attractive. Thin-film solar cells on basis of Cu(In,Ga)Se2

  11. Gateway:América Latina/Aprender más sobre las ERNC/Seleccion...

    Open Energy Info (EERE)

    Fotovoltaica Solar Energy: Essential Technologies for Test, Monitoring, and Control Fuente: : National Instruments Idioma: Ingls Trmica Retrieved from "http:en.openei.orgw...

  12. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    Estimating Unmeasured Solar Radiation Quantities . . . . . .Solar Data a. SOLAR RADIATION Solar radiation data provide aAppendix C - Appendix 0 - Solar Radiation Glossary. Convers

  13. ORNL, Industry Collaboration Puts Spotlight on Solar T DOING...

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

    for thin-film copper indium gallium di- selenide, a direct-bandgap material for solar cells. Ferro Corpora- tion (Independence, Ohio) is creating inks and pastes to be used for...

  14. Generation of low work function, stable compound thin films by laser ablation

    DOE Patents [OSTI]

    Dinh, Long N. (Concord, CA); McLean, II, William (Oakland, CA); Balooch, Mehdi (Berkeley, CA); Fehring, Jr., Edward J. (Dublin, CA); Schildbach, Marcus A. (Livermore, CA)

    2001-01-01

    Generation of low work function, stable compound thin films by laser ablation. Compound thin films with low work function can be synthesized by simultaneously laser ablating silicon, for example, and thermal evaporating an alkali metal into an oxygen environment. For example, the compound thin film may be composed of Si/Cs/O. The work functions of the thin films can be varied by changing the silicon/alkali metal/oxygen ratio. Low work functions of the compound thin films deposited on silicon substrates were confirmed by ultraviolet photoelectron spectroscopy (UPS). The compound thin films are stable up to 500.degree. C. as measured by x-ray photoelectron spectroscopy (XPS). Tests have established that for certain chemical compositions and annealing temperatures of the compound thin films, negative electron affinity (NEA) was detected. The low work function, stable compound thin films can be utilized in solar cells, field emission flat panel displays, electron guns, and cold cathode electron guns.

  15. Scattering of long wavelengths into thin silicon photovoltaic films by plasmonic silver nanoparticles

    E-Print Network [OSTI]

    Osgood, R. M.

    Nanoparticles and nanostructures with plasmonic resonances are currently being employed to enhance the efficiency of solar cells. Ag stripe arrays have been shown theoretically to enhance the short-circuit current of thin ...

  16. Mechanisms of Zinc Oxide Nanocrystalline Thin Film Formation by Thermal Degradation of Metal-Loaded Hydrogels

    E-Print Network [OSTI]

    electrode in flat- panel displays,1 solar cells, and thin-film transistors.2,3 Other recent reports account as a short-range probe to investigate the first stages of nucleation and the following development of Zn

  17. Intermixing at the absorber-buffer layer interface in thin-film...

    Office of Scientific and Technical Information (OSTI)

    Intermixing at the absorber-buffer layer interface in thin-film solar cells: The electronic effects of point defects in Cu(In,Ga)(Se,S)sub 2 and Cusub 2ZnSn(Se,S)sub 4...

  18. Defect engineering of cuprous oxide thin-films for photovoltaic applications

    E-Print Network [OSTI]

    Lee, Yun Seog

    2013-01-01

    Thin-film solar cells are promising for renewable-energy applications due to their low material usage and inexpensive manufacturing potential, making them compatible with terawatts-level deployment. Cuprous oxide (Cu?O) ...

  19. Enhanced absorption of thin-film photovoltaic cells using an optical cavity

    E-Print Network [OSTI]

    Hsu, Wei-Chun

    We show via numerical simulations that the absorption and solar energy conversion efficiency of a thin-film photovoltaic (PV) cell can be significantly enhanced by embedding it into an optical cavity. A reflective ...

  20. Solar Forecasting

    Broader source: Energy.gov [DOE]

    On December 7, 2012, DOE announced $8 million to fund two solar projects that are helping utilities and grid operators better forecast when, where, and how much solar power will be produced at U.S....

  1. Solar Rights

    Broader source: Energy.gov [DOE]

    A solar energy system is defined as "a system affixed to a building or buildings that uses solar devices, which are thermally isolated from living space or any other area where the energy is used...

  2. Solar Rights

    Broader source: Energy.gov [DOE]

    In the context of this law, a solar energy device is a system "manufactured and sold for the sole purpose of facilitating the collection and beneficial use of solar energy, including passive...

  3. FLEXIBLE CdTe SOLAR CELLS BY A LOW TEMPERATURE PROCESS ON ITO/ZnO COATED A. Salavei, I. Rimmaudo, F. Piccinelli1

    E-Print Network [OSTI]

    Romeo, Alessandro

    FLEXIBLE CdTe SOLAR CELLS BY A LOW TEMPERATURE PROCESS ON ITO/ZnO COATED POLYMERS A. Salavei, I will be discussed. Keywords: Flexible Substrate, CdTe, ITO, Laser Processing, Thin Film Solar Cell 1 INTRODUCTION Thin film solar cells deposited on a flexible substrate are easier to integrate in buildings; they also

  4. Microscale solar cells for high concentration on polycrystalline Cu(In,Ga)Se2 Myriam Paire,1,2,3,4,a)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    thin film solar cell material,7 and efficiencies over 20% were achieved recently. We study CIGS to decrease with illumination. The device described in this letter is a glass/Mo/CIGS/ CdS/ZnO solar cellMicroscale solar cells for high concentration on polycrystalline Cu(In,Ga)Se2 thin films Myriam

  5. Solar collectors

    SciTech Connect (OSTI)

    Cassidy, V.M.

    1981-11-01

    Practical applications of solar energy in commercial, industrial and institutional buildings are considered. Two main types of solar collectors are described: flat plate collectors and concentrating collectors. Efficiency of air and hydronic collectors among the flat plate types are compared. Also several concentrators are described, including their sun tracking mechanisms. Descriptions of some recent solar installations are presented and a list representing the cross section of solar collector manufacturers is furnished.

  6. Thin-film Sb2Se3 photovoltaics with oriented one-dimensional ribbons and benign

    E-Print Network [OSTI]

    Sargent, Edward H. "Ted"

    to the substrate, and produced Sb2Se3 thin-film solar cells with a certified device efficiency of 5.6%. Our results are one of the major limiting factors for high-efficiency thin-film solar cells. We began with first cells based on inorganic absorbers, such as Si, GaAs, CdTe and Cu(In,Ga)Se2, permit a high device

  7. Detailed Balance Analysis and Enhancement of Open-Circuit Voltage in Single-Nanowire Solar Cells

    E-Print Network [OSTI]

    Fan, Shanhui

    of a thin film GaAs cell,20 a thin film GaAs cell with gratings,16 and a cell with a photonic crystal top- voltaics.1-3 Compared with traditional thin-film solar cells,4,5 the advantage of the nanowire cells out such a detailed balance analysis of a single nanowire solar cell, using gallium arsenide (GaAs

  8. Optimization of chemical bath deposited CdS thin films using nitrilotriacetic acid as a complexing agent

    E-Print Network [OSTI]

    Chow, Lee

    thin film solar cells based on CdTe or CIGS [1,2]. CdS has also been used in other applications. The highest efficiencies reported for both CdTe and CIGS solar cells were obtained when chemical bath is known to greatly enhance the performance of CdS windows used in the above mentioned solar cells

  9. Development of an IR-transparent, inverted-grown, thin-film, Al[sub 0. 34]Ga[sub 0. 66]As/GaAs cascade solar cell

    SciTech Connect (OSTI)

    Venkatasubramanian, R.; Timmons, M.L.; Sharps, P.R.; Colpitts, T.S.; Hills, J.S.; Hancock, J.; Hutchby, J.A. )

    1992-12-01

    Inverted growth and the development of associated cell processing, are likely to offer a significant degree of freedom for improving the performance of many III-V multijunction cascades and open new avenues for advanced multijunction concepts. This is especially true for the development of high-efficiency Al[sub 0.37]Ga[sub 0.63]As/GaAs cascades where the high growth temperatures required for the AlGaAs top cell growth can cause the deterioration of the tunnel junction interconnect. In the approach of inverted-grown AlGaAs/GaAs cascade cells, the AlGaAs top cell is grown first at 780 [degree]C and the GaAs tunnel junction and bottom cell are grown at 675 [degree]C. After the inverted growth, the AlGaAs/GaAs cascade structure is selectively removed from the parent substrate. The feasibility of inverted growth is demonstrated by a fully-processed, inverted-grown, thin film GaAs cell with a 1-sun AM1.5 efficiency of 20.3%. Also, an inverted-grown, thin-film, Al[sub 0.34]Ga[sub 0.66]As/GaAs cascade with AM1.5 efficiencies of 19.9% and 21% at 1-sun and 7-suns, respectively, has been obtained.

  10. May 2003 NREL/CP-520-33933 Amorphous and Thin-Film

    E-Print Network [OSTI]

    Deng, Xunming

    May 2003 · NREL/CP-520-33933 Amorphous and Thin-Film Silicon B.P. Nelson, H.A. Atwater, B. von and Thin-Film Silicon Brent P. Nelson,1 Harry A. Atwater,2 Bolko von Roedern,1 Jeff Yang,3 Paul Sims,4 in the Amorphous and Thin-Film Silicon session at the National Center for Photovoltaics and Solar Program Review

  11. Baker-Barry Tunnel Lighting: Evaluation of a Potential GATEWAY Demonstrations Project

    SciTech Connect (OSTI)

    Tuenge, Jason R.

    2011-06-28

    The U.S. Department of Energy is evaluating the Baker-Barry Tunnel as a potential GATEWAY Demonstrations project for deployment of solid-state lighting (SSL) technology. The National Park Service views this project as a possible proving ground and template for implementation of light-emitting diode (LED) luminaires in other tunnels, thereby expanding the estimated 40% energy savings from 132 MWh/yr to a much larger figure nationally. Most of the energy savings in this application is attributable to the instant-restrike capability of LED products and to their high tolerance for frequent on/off switching, used here to separately control either end of the tunnel during daytime hours. Some LED luminaires rival or outperform their high-intensity discharge (HID) counterparts in terms of efficacy, but options are limited, and smaller lumen packages preclude true one-for-one equivalence. However, LED products continue to improve in efficacy and affordability at a rate unmatched by other light source technologies; the estimated simple payback period of eight years (excluding installation costs and maintenance savings) can be expected to improve with time. The proposed revisions to the existing high-pressure sodium (HPS) lighting system would require slightly increased controls complexity and significantly increased luminaire types and quantities. In exchange, substantial annual savings (from reduced maintenance and energy use) would be complemented by improved quantity and quality of illumination. Although advanced lighting controls could offer additional savings, it is unclear whether such a system would prove cost-effective; this topic may be explored in future work.

  12. Solar Physics A Journal for Solar and Solar-Stellar

    E-Print Network [OSTI]

    Padmanabhan, Janardhan

    investigated in the build-up to one of the deepest solar minima expe- rienced in the past 100 years1 23 Solar Physics A Journal for Solar and Solar-Stellar Research and the Study of Solar-013-0335-3 Changes in Quasi-periodic Variations of Solar Photospheric Fields: Precursor to the Deep Solar Minimum

  13. NATURE MATERIALS | VOL 13 | MARCH 2014 | www.nature.com/naturematerials 233 hotovoltaic devices --which convert abundant, free solar

    E-Print Network [OSTI]

    Sargent, Edward H. "Ted"

    that provide a nanoparticle-size-dependent band- gap -- offer an avenue to tandem and multi-junction solar the simultaneous combination of low cost and high efficiency. Si-based solar cells1 , vapour-phase-processed thin-film solar cells such as CdS/CdTe (ref. 2) and next-generation solution- processed solar cells based

  14. Full Spectrum Boost in Nanoparticle Solar Cells UC Davis/Theory: F.Gygi, M.Voros, GTZ

    E-Print Network [OSTI]

    designs are needed GaAs 29% Alta Devices HIT c-Si cell 26% Panasonic, SunPower Thin film CdTe 20Full Spectrum Boost in Nanoparticle Solar Cells UC Davis/Theory: F.Gygi, M.Voros, GTZ UC Davis% First Solar Organic solar cells 12% Sumitomo #12;Solar Energy Conversion: Basics 5 1. No absorption

  15. Rapid Deposition Technology Holds the Key for the World's Largest Solar Manufacturer (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-10-01

    Thanks in part to years of collaboration with the National Renewable Energy Laboratory (NREL), a manufacturer of thin-film solar modules has grown from a small garage-type operation to become the world's largest manufacturer of solar modules. First Solar, Inc. now manufactures cadmium telluride (CdTe) solar modules throughout the world, but it began in Ohio as a small company called Solar Cells, Inc.

  16. Synthesis and Characterization of Functional Nanostructured Zinc Oxide Thin Films

    E-Print Network [OSTI]

    Chow, Lee

    .1149/1.2357098, copyright The Electrochemical Society 65 #12;66 reduced environmental impact and a minimum undesirable inter-temperature thin film growth technique has been developed to fabricate a new generation of smart and functional and structural requirements of their applications in gas sensors and solar cells. The rapid photothermal

  17. Long-wave instabilities and saturation in thin film equations

    E-Print Network [OSTI]

    Pugh, Mary

    to shorter wavelengths which then dissipate the energy. The nonlinearity in the KS equation is advective.2) The equation arises as an interface model in bio-fluids [15], solar convec- tion [19], and binary alloys [48Long-wave instabilities and saturation in thin film equations A. L. Bertozzi Department

  18. Longwave instabilities and saturation in thin film equations

    E-Print Network [OSTI]

    Pugh, Mary

    then dissipate the energy. The nonlinearity in the KS equation is advective, and a#ects the dy­ namics di.2) The equation arises as an interface model in bio­fluids [15], solar convec­ tion [19], and binary alloys [48Long­wave instabilities and saturation in thin film equations A. L. Bertozzi Department

  19. Emerging High-Efficiency Low-Cost Solar Cell Technologies

    E-Print Network [OSTI]

    McGehee, Michael

    J. of Photovoltaics, 2 (2012) p. 303. Si GaAs #12;Why thin film GaAs;Gallium Arsenide · The 1.4 eV band gap is ideal for solar cells. · High quality films are grownEmerging High-Efficiency Low-Cost Solar Cell Technologies Mike McGehee Materials Science

  20. Thermally Induced Vibrations of a Solar Wing with Bowed STEM 

    E-Print Network [OSTI]

    Hagler, Shawn 1983-

    2010-11-30

    Thin Film Solar Array (HPSA) which could provide 130kW of power to a spacecraft. The deployed structure relies on bowed STEMs and a tether system to keep the solar panels taut and in alignment with the sun. The system is predicted to minimize...

  1. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    network approach of solar potential in Turkey,” Renewabledue to the high solar resource potential. However, the solar

  2. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    Estimating Unmeasured Solar Radiation Quantities . . . . . .Weather Data . . . . . , . , . . . . . . . . . .Solar DataB. l'he Solar Constant. . . . . . C. Solar Time and Standard

  3. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    data records. 1, Solar Data Solar energy is a general termin obtaining reliable data for solar energy applications,data and analyzed the consequences of designing solar energy

  4. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    a characteristic solar potential is expected to prevail, Theso many sites of potential solar energy applications will besun creates a high potential for solar energy use. Solar-

  5. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    and forecasting of solar radiation data: a review,”forecasting of solar- radiation data,” Solar Energy, vol.sequences of global solar radiation data for isolated sites:

  6. Hot electron effect in nanoscopically thin photovoltaic junctions K. Kempa,1,2,a

    E-Print Network [OSTI]

    Huang, Jianyu

    with photon energy. The key to observing this effect, one of several so-called third generation solarHot electron effect in nanoscopically thin photovoltaic junctions K. Kempa,1,2,a M. J. Naughton,1 efficiency photo- voltaics PVs . One of the seminal concepts proposed for next-generation solar cells

  7. Optical Durability of Candidate Solar Reflectors for Concentrating Solar Power

    SciTech Connect (OSTI)

    Kennedy, C. E.; Terwilliger, K.

    2007-01-01

    Concentrating solar power (CSP) technologies use large mirrors to collect sunlight to convert thermal energy to electricity. The viability of CSP systems requires the development of advanced reflector materials that are low in cost and maintain high specular reflectance for extended lifetimes under severe outdoor environments. The long-standing goals for a solar reflector are specular reflectance above 90% into a 4 mrad half-cone angle for at least 10 years outdoors with a cost of less than $13.8/m{sup 2} (the 1992 $10.8/m{sup 2} goal corrected for inflation to 2002 dollars) when manufactured in large volumes. Durability testing of a variety of candidate solar reflector materials at outdoor test sites and in laboratory accelerated weathering chambers is the main activity within the Advanced Materials task of the CSP Program at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. Test results to date for several candidate solar reflector materials will be presented. These include the optical durability of thin glass, thick glass, aluminized reflectors, front-surface mirrors, and silvered polymer mirrors. The development, performance, and durability of these materials will be discussed. Based on accelerated exposure testing the glass, silvered polymer, and front-surface mirrors may meet the 10 year lifetime goals, but at this time because of significant process changes none of the commercially available solar reflectors and advanced solar reflectors have demonstrated the 10 year or more aggressive 20 year lifetime goal.

  8. Solar Rights

    Broader source: Energy.gov [DOE]

    Ordinances, bylaws, or regulations may reasonably restrict the installation and use of solar energy devices to protect public health and safety, buildings from damage, historic/aesthetic values ...

  9. AC conductivity of nanoporous metal-oxide photoanodes for solar energy conversion

    E-Print Network [OSTI]

    Konezny, Steven J.

    AC conductivity of nanoporous metal-oxide photoanodes for solar energy conversion Steven J. Konezny% solar-to-electric energy conversion efficiency) exploited the large surface area of nanoporous thin for solar photoconversion is analyzed using a model based on fluctuation-induced tunneling conduction (FITC

  10. Effects of Series Resistance and Inductance on Solar Cell Admittance Measurements(a)

    E-Print Network [OSTI]

    Scofield, John H.

    on a variety of 0.43 cm2 area, copper indium gallium diselenide (CIGS) polycrystalline thin film solar cellsEffects of Series Resistance and Inductance on Solar Cell Admittance Measurements(a) John H Energy Materials and Solar Cells on April 17, 1994) Admittance measurements have been performed

  11. NUMERICAL MODELING OF CIGS AND CdTe SOLAR CELLS: SETTING THE BASELINE

    E-Print Network [OSTI]

    Sites, James R.

    NUMERICAL MODELING OF CIGS AND CdTe SOLAR CELLS: SETTING THE BASELINE M. Gloeckler, A important complications that are often found in experimental CIGS and CdTe solar cells. 1. INTRODUCTION Numerical modeling of polycrystalline thin-film solar cells is an important strategy to test the viability

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

    E-Print Network [OSTI]

    Romeo, Alessandro

    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

  13. DISSERTATION Role of the Cu-O Defect in CdTe Solar Cells

    E-Print Network [OSTI]

    Sites, James R.

    DISSERTATION Role of the Cu-O Defect in CdTe Solar Cells Submitted by Caroline R. Corwine OF THE CU-O DEFECT COMPLEX IN CDTE SOLAR CELLS Thin-film CdTe is one of the leading materials used in photovoltaic (PV) solar cells. One way to improve device performance and stability is through understanding how

  14. ORIGINAL ARTICLE Highly efficient GaAs solar cells by limiting light emission

    E-Print Network [OSTI]

    Polman, Albert

    a non-concentrating system with limited emission angle in a thin, light trapping GaAs solar cellORIGINAL ARTICLE Highly efficient GaAs solar cells by limiting light emission angle Emily D Kosten1 of a high-quality GaAs solar cell is a feasible route to achieving power conversion efficiencies above 38

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

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    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

  16. Radiative Heating and the Buoyant Rise of Magnetic Flux Tubes in the Solar Interior

    E-Print Network [OSTI]

    California at Berkeley, University of

    Radiative Heating and the Buoyant Rise of Magnetic Flux Tubes in the Solar Interior Y. Fan National the e ect of radiative heating on the evolution of thin magnetic ux tubes in the solar interior Solar Observatoryy, 950 N. Cherry Ave., Tucson, AZ 85719. G. H. Fisher Space Sciences Laboratory, Univ

  17. Stabilization of solar films against hi temperature deactivation

    DOE Patents [OSTI]

    Jefferson, Clinton F. (Millburn, NJ)

    1984-03-20

    A multi-layer solar energy collector of improved stability comprising: (1) a solar absorptive film consisting essentially of copper oxide, cobalt oxide and manganese oxide; (2) a substrate of quartz, silicate glass or a stainless steel; and (3) an interlayer of platinum, plus a method for preparing a thermally stable multi-layered solar collector, in which the absorptive layer is undercoated with a thin film of platinum to obtain a stable conductor-dielectric tandem.

  18. Heterojunction solar cell with passivated emitter surface

    DOE Patents [OSTI]

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

    1994-01-01

    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.

  19. Heterojunction solar cell with passivated emitter surface

    DOE Patents [OSTI]

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

    1994-05-31

    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.

  20. Solar Physics A Journal for Solar and Solar-

    E-Print Network [OSTI]

    Padmanabhan, Janardhan

    1 23 Solar Physics A Journal for Solar and Solar- Stellar Research and the Study of Solar-010-9653- x Solar Polar Fields During Cycles 21??? 23: Correlation with Meridional Flows #12;1 23 Your article's request, provided it is not made publicly available until 12 months after publication. #12;Solar Phys

  1. Gateway:U.S. OpenLabs/Research Groups | Open Energy Information

    Open Energy Info (EERE)

    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 QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavy ElectricalsFTL SolarGate Solar Jump to: navigation,U.S.

  2. Electrochemical thinning of silicon

    DOE Patents [OSTI]

    Medernach, John W. (Albuquerque, NM)

    1994-01-01

    Porous semiconducting material, e.g. silicon, is formed by electrochemical treatment of a specimen in hydrofluoric acid, using the specimen as anode. Before the treatment, the specimen can be masked. The porous material is then etched with a caustic solution or is oxidized, depending of the kind of structure desired, e.g. a thinned specimen, a specimen, a patterned thinned specimen, a specimen with insulated electrical conduits, and so on. Thinned silicon specimen can be subjected to tests, such as measurement of interstitial oxygen by Fourier transform infra-red spectroscopy (FTIR).

  3. Electrochemical thinning of silicon

    DOE Patents [OSTI]

    Medernach, J.W.

    1994-01-11

    Porous semiconducting material, e.g. silicon, is formed by electrochemical treatment of a specimen in hydrofluoric acid, using the specimen as anode. Before the treatment, the specimen can be masked. The porous material is then etched with a caustic solution or is oxidized, depending of the kind of structure desired, e.g. a thinned specimen, a specimen, a patterned thinned specimen, a specimen with insulated electrical conduits, and so on. Thinned silicon specimen can be subjected to tests, such as measurement of interstitial oxygen by Fourier transform infra-red spectroscopy (FTIR). 14 figures.

  4. Thin film hydrogen sensor

    DOE Patents [OSTI]

    Cheng, Y.T.; Poli, A.A.; Meltser, M.A.

    1999-03-23

    A thin film hydrogen sensor includes a substantially flat ceramic substrate with first and second planar sides and a first substrate end opposite a second substrate end; a thin film temperature responsive resistor on the first planar side of the substrate proximate to the first substrate end; a thin film hydrogen responsive metal resistor on the first planar side of the substrate proximate to the fist substrate end and proximate to the temperature responsive resistor; and a heater on the second planar side of the substrate proximate to the first end. 5 figs.

  5. Thin film hydrogen sensor

    DOE Patents [OSTI]

    Cheng, Yang-Tse (Rochester Hills, MI); Poli, Andrea A. (Livonia, MI); Meltser, Mark Alexander (Pittsford, NY)

    1999-01-01

    A thin film hydrogen sensor, includes: a substantially flat ceramic substrate with first and second planar sides and a first substrate end opposite a second substrate end; a thin film temperature responsive resistor on the first planar side of the substrate proximate to the first substrate end; a thin film hydrogen responsive metal resistor on the first planar side of the substrate proximate to the fist substrate end and proximate to the temperature responsive resistor; and a heater on the second planar side of the substrate proximate to the first end.

  6. Unified Solar

    Broader source: Energy.gov [DOE]

    Unified Solar is an MIT startup that is commercializing an integrated circuit solution that eliminates most of the adverse effects caused by partial shading in photovoltaic power systems. With its patent-pending design, Unified Solar's solution is smaller, cheaper and more powerful than any competing power optimizer in the market.

  7. Gateway Management Console (GMC) Instructions The GMC is the integration point for how departments will augment the UCSB financial systems and

    E-Print Network [OSTI]

    the bulk upload down load go the Bulk Account Management page. Search for your department, and click loaded either manually or by the bulk load; account strings can be managed at this page. It is importantGateway Management Console (GMC) Instructions The GMC is the integration point for how departments

  8. Petrovay: Solar physics Helioseismology SOLAR OSCILLATIONS: INTRODUCTION

    E-Print Network [OSTI]

    Petrovay, Kristóf

    where = T(P0/P) ad (potential temperature) #12;Petrovay: Solar physics Helioseismology Group velocity Helioseismology Global helioseismology: Determine set of nlm's infer global mean solar structure. LocalPetrovay: Solar physics Helioseismology SOLAR OSCILLATIONS: INTRODUCTION Small departures from

  9. Multifunctional thin film surface

    DOE Patents [OSTI]

    Brozik, Susan M.; Harper, Jason C.; Polsky, Ronen; Wheeler, David R.; Arango, Dulce C.; Dirk, Shawn M.

    2015-10-13

    A thin film with multiple binding functionality can be prepared on an electrode surface via consecutive electroreduction of two or more aryl-onium salts with different functional groups. This versatile and simple method for forming multifunctional surfaces provides an effective means for immobilization of diverse molecules at close proximities. The multifunctional thin film has applications in bioelectronics, molecular electronics, clinical diagnostics, and chemical and biological sensing.

  10. Control of morphology for enhanced electronic transport in PECVD-grown a-Si : H Thin Films

    E-Print Network [OSTI]

    Castro Galnares, Sebastián

    2010-01-01

    Solar cells have become an increasingly viable alternative to traditional, pollution causing power generation methods. Although crystalline silicon (c-Si) modules make up most of the market, thin films such as hydrogenated ...

  11. Solar | ornl.gov

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

    Solar SHARE Solar ORNL's Solar Technologies program supports the U.S. Department of Energy (DOE) Solar Energy Technologies Office - SunShot Initiative goal to make solar energy...

  12. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    Techniques for Daily Solar Radiation Data. Proceedings ofa. SOLAR RADIATION Solar radiation data provide a measure ofMonthly Solar Data Latitude: Jan SOLAR RADIATION (kWhJm2 per

  13. Sandia Energy - Solar Resource Assessment

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

    Solar Resource Assessment Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Resource Assessment Solar Resource AssessmentTara...

  14. Sandia Energy - Solar Market Transformation

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

    Solar Market Transformation Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation Solar Market TransformationTara...

  15. Solar Two

    SciTech Connect (OSTI)

    Not Available

    1998-04-01

    Solar Two is a concentrating solar power plant that can supply electric power on demand to the local utility, Southern California Edison Company. It can do so because it operates not only during sunny parts of the day, but it can store enough thermal energy from the sun to operate during cloudy periods and after dark, for up to three hours, at its rated output of 10 megawatts (MW). For the first time ever, a utility scale solar power plant can supply electricity when the utility needs it most, to satisfy the energy requirements of its customers.

  16. An all-inorganic type-II heterojunction array with nearly full solar spectral response based on ZnO/ZnSe core/shell nanowires

    E-Print Network [OSTI]

    Nasipuri, Asis

    on inorganic or organic materials, such as silicon-based thin film solar cells,2 multi-junction solar cells,3 architecture. 1. Introduction Solar cells have been a subject of great interest due to the growing awareness and dye-sensitized solar cells (DSSCs).4 Nevertheless, most of them suffer from either high cost

  17. This interactive exhibit is a bean bag tossing game that teaches about the energy of different colors of light and how a solar cell works. Kids

    E-Print Network [OSTI]

    Hochberg, Michael

    is a generalized schematic that could apply to organic or inorganic thin film solar cells. · Directions / Socratic of different colors of light and how a solar cell works. Kids toss colored bean bags at a model solar cell Sequence Hand the child the bean bags. Tell them "The poster shows the layers of a solar cell seen from

  18. Nanostructured columnar heterostructures of TiO2 and Cu2O enabled by a thin-film self-assembly approach: Potential for photovoltaics

    E-Print Network [OSTI]

    Pennycook, Steve

    difficulties and potentially realize higher efficiencies, new approaches such as multi-junction solar cells of planar geometry, single junction thin film solar cells, in particular cadmium telluride (CdTe) and copper (with efficiencies of over 40%) [5], dye sensitized solar cells, bulk heterojunctions and organic cells

  19. Solar Rights

    Broader source: Energy.gov [DOE]

    In June of 2015, SB 1626 was signed into law. It provides that during the development period, the developer may only prohibit  a property owner from installing solar in developments with 50 or...

  20. Fabrication of polycrystalline thin films by pulsed laser processing

    DOE Patents [OSTI]

    Mitlitsky, Fred (Livermore, CA); Truher, Joel B. (San Rafael, CA); Kaschmitter, James L. (Pleasanton, CA); Colella, Nicholas J. (Livermore, CA)

    1998-02-03

    A method for fabricating polycrystalline thin films on low-temperature (or high-temperature) substrates which uses processing temperatures that are low enough to avoid damage to the substrate, and then transiently heating select layers of the thin films with at least one pulse of a laser or other homogenized beam source. The pulse length is selected so that the layers of interest are transiently heated to a temperature which allows recrystallization and/or dopant activation while maintaining the substrate at a temperature which is sufficiently low to avoid damage to the substrate. This method is particularly applicable in the fabrication of solar cells.