National Library of Energy BETA

Sample records for film iii-v photovoltaics

  1. A direct thin-film path towards low-cost large-area III-V photovoltaics

    E-Print Network [OSTI]

    California at Berkeley, University of

    A direct thin-film path towards low-cost large-area III-V photovoltaics Rehan Kapadia1,2 *, Zhibin-V photovoltaics (PVs) have demonstrated the highest power conversion efficiencies for both single- and multi times, and large equipment investments restrict applications to concentrated and space photovoltaics

  2. III-V High-Efficiency Multijunction Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-06-01

    Capabilities fact sheet that includes scope, core competencies and capabilities, and contact/web information for III-V High-Efficiency Multijunction Photovoltaics at the National Center for Photovoltaics.

  3. Multijunction III-V Photovoltaics Research

    Broader source: Energy.gov [DOE]

    DOE invests in multijunction III-V solar cell research to drive down the costs of the materials, manufacturing, tracking techniques, and concentration methods used with this technology. Below is a...

  4. PROJECT PROFILE: High-Efficiency, Low-Cost, One-Sun, III-V Photovoltaics

    Broader source: Energy.gov [DOE]

    Low-cost III-V photovoltaics have the potential to lower the levelized cost of energy (LCOE) because III-V cells outperform silicon in terms of efficiency and annual energy harvesting efficiency. In this project, researchers will address both the high costs of III-V epitaxy and single crystal substrates. Hydride vapor phase epitaxy (HVPE) is the most promising inexpensive, rapid-growth technique for high efficiency, III-V materials. The continued development of high-throughput HVPE, will be coupled with novel epitaxial liftoff strategies to enable III-V solar cells that are cost-competitive under one-sun conditions.

  5. 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.

  6. Lattice-Mismatched III-V Epilayers for High-Efficiency Photovoltaics

    SciTech Connect (OSTI)

    Ahrenkiel, Scott Phillip

    2013-06-30

    The project focused on development of new approaches and materials combinations to expand and improve the quality and versatility of lattice-mismatched (LMM) III-V semiconductor epilayers for use in high-efficiency multijunction photovoltaic (PV) devices. To address these goals, new capabilities for materials synthesis and characterization were established at SDSM&T that have applications in modern opto- and nano-electronics, including epitaxial crystal growth and transmission electron microscopy. Advances were made in analyzing and controlling the strain profiles and quality of compositional grades used for these technologies. In particular, quaternary compositional grades were demonstrated, and a quantitative method for characteristic X-ray analysis was developed. The project allowed enhanced collaboration between scientists at NREL and SDSM&T to address closely related research goals, including materials exchange and characterization.

  7. High Efficiency Nanostructured III-V Photovoltaics for Solar Concentrator Application

    SciTech Connect (OSTI)

    Hubbard, Seth

    2012-09-12

    The High Efficiency Nanostructured III-V Photovoltaics for Solar Concentrators project seeks to provide new photovoltaic cells for Concentrator Photovoltaics (CPV) Systems with higher cell efficiency, more favorable temperature coefficients and less sensitivity to changes in spectral distribution. The main objective of this project is to provide high efficiency III-V solar cells that will reduce the overall cost per Watt for power generation using CPV systems.This work is focused both on a potential near term application, namely the use of indium arsenide (InAs) QDs to spectrally "tune" the middle (GaAs) cell of a SOA triple junction device to a more favorable effective bandgap, as well as the long term goal of demonstrating intermediate band solar cell effects. The QDs are confined within a high electric field i-region of a standard GaAs solar cell. The extended absorption spectrum (and thus enhanced short circuit current) of the QD solar cell results from the increase in the sub GaAs bandgap spectral response that is achievable as quantum dot layers are introduced into the i-region. We have grown InAs quantum dots by OMVPE technique and optimized the QD growth conditions. Arrays of up to 40 layers of strain balanced quantum dots have been experimentally demonstrated with good material quality, low residual stain and high PL intensity. Quantum dot enhanced solar cells were grown and tested under simulated one sun AM1.5 conditions. Concentrator solar cells have been grown and fabricated with 5-40 layers of QDs. Testing of these devices show the QD cells have improved efficiency compared to baseline devices without QDs. Device modeling and measurement of thermal properties were performed using Crosslight APSYS. Improvements in a triple junction solar cell with the insertion of QDs into the middle current limiting junction was shown to be as high as 29% under one sun illumination for a 10 layer stack QD enhanced triple junction solar cell. QD devices have strong potential for net gains in efficiency at high concentration.

  8. Thin film photovoltaic cell

    DOE Patents [OSTI]

    Meakin, John D. (Newark, DE); Bragagnolo, Julio (Newark, DE)

    1982-01-01

    A thin film photovoltaic cell having a transparent electrical contact and an opaque electrical contact with a pair of semiconductors therebetween includes utilizing one of the electrical contacts as a substrate and wherein the inner surface thereof is modified by microroughening while being macro-planar.

  9. Raising the Efficiency Ceiling with Multijunction III-V Concentrator Photovoltaics

    SciTech Connect (OSTI)

    King, R. R.; Boca, A.; Edmondson, K. M.; Romero, M. J.; Yoon, H.; Law, D. C.; Fetzer, C. M.; Haddad, M.; Zakaria, A.; Hong, W.; Mesropian, S.; Krut, D. D.; Kinsey, G. S.; Pien, R.; Sherif, R. A.; Karam, N. H.

    2008-01-01

    In this paper, we look at the question 'how high can solar cell efficiency go?' from both theoretical and experimental perspectives. First-principle efficiency limits are analyzed for some of the main candidates for high-efficiency multijunction terrestrial concentrator cells. Many of these cell designs use lattice-mismatched, or metamorphic semiconductor materials in order to tune subcell band gaps to the solar spectrum. Minority-carrier recombination at dislocations is characterized in GaInAs inverted metamorphic solar cells, with band gap ranging from 1.4 to 0.84 eV, by light I-V, electron-beam-induced current (EBIC), and cathodoluminescence (CL). Metamorphic solar cells with a 3-junction GaInP/ GaInAs/ Ge structure were the first cells to reach over 40% efficiency, with an independently confirmed efficiency of 40.7% (AM1.5D, low-AOD, 240 suns, 25 C). The high efficiency of present III-V multijunction cells now in high-volume production, and still higher efficiencies of next-generation cells, is strongly leveraging for low-cost terrestrial concentrator PV systems.

  10. 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.

  11. 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.

  12. Non-Epitaxial Thin-Film Indium Phosphide Photovoltaics: Growth, Devices, and Cost Analysis

    E-Print Network [OSTI]

    Zheng, Maxwell S

    2015-01-01

    1 I NTRODUCTION Solar energy and photovoltaics The case forFOR III-V PHOTOVOLTAICS III-V semiconductor solar cells havesolar cell structure for large- scale photovoltaics. InP is

  13. Thin film photovoltaic panel and method

    DOE Patents [OSTI]

    Ackerman, Bruce (El Paso, TX); Albright, Scot P. (El Paso, TX); Jordan, John F. (El Paso, TX)

    1991-06-11

    A thin film photovoltaic panel includes a backcap for protecting the active components of the photovoltaic cells from adverse environmental elements. A spacing between the backcap and a top electrode layer is preferably filled with a desiccant to further reduce water vapor contamination of the environment surrounding the photovoltaic cells. The contamination of the spacing between the backcap and the cells may be further reduced by passing a selected gas through the spacing subsequent to sealing the backcap to the base of the photovoltaic panels, and once purged this spacing may be filled with an inert gas. The techniques of the present invention are preferably applied to thin film photovoltaic panels each formed from a plurality of photovoltaic cells arranged on a vitreous substrate. The stability of photovoltaic conversion efficiency remains relatively high during the life of the photovoltaic panel, and the cost of manufacturing highly efficient panels with such improved stability is significantly reduced.

  14. Direct Thin Film Path to Low Cost, Large Area III-V Photovoltaics - Energy

    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 would like submit theCovalent BondingMeetingDifferencesPlatinum Fuel Cell Cathode |Innovation

  15. Doping and electronic properties of GaAs grown by close-spaced vapor transport from powder sources for scalable III–V photovoltaics

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ritenour, Andrew J.; Boucher, Jason W.; DeLancey, Robert; Greenaway, Ann L.; Aloni, Shaul; Boettcher, Shannon W.

    2014-09-01

    We report the use of a simple close-spaced vapor transport technique for the growth of high-quality epitaxial GaAs films using potentially inexpensive GaAs powders as precursors. The free carrier type and density (1016 to 1019 cm–3) of the films were adjusted by addition of Te or Zn powder to the GaAs source powder. We show using photoelectrochemical and electron beam-induced current analyses that the minority carrier diffusion lengths of the n- and p-GaAs films reached ~3 ?m and ~8 ?m, respectively. Hall mobilities approach those achieved for GaAs grown by metal–organic chemical vapor deposition, 1000–4200 cm2 V–1 s–1 for n-GaAsmore »and 50–240 cm V–1 s–1 for p-GaAs depending on doping level. We conclude that the electronic quality of GaAs grown by close-spaced vapor transport is similar to that of GaAs made using conventional techniques and is thus sufficient for high-performance photovoltaic applications.« less

  16. Doping and electronic properties of GaAs grown by close-spaced vapor transport from powder sources for scalable III–V photovoltaics

    SciTech Connect (OSTI)

    Ritenour, Andrew J.; Boucher, Jason W.; DeLancey, Robert; Greenaway, Ann L.; Aloni, Shaul; Boettcher, Shannon W.

    2014-09-01

    We report the use of a simple close-spaced vapor transport technique for the growth of high-quality epitaxial GaAs films using potentially inexpensive GaAs powders as precursors. The free carrier type and density (1016 to 1019 cm–3) of the films were adjusted by addition of Te or Zn powder to the GaAs source powder. We show using photoelectrochemical and electron beam-induced current analyses that the minority carrier diffusion lengths of the n- and p-GaAs films reached ~3 ?m and ~8 ?m, respectively. Hall mobilities approach those achieved for GaAs grown by metal–organic chemical vapor deposition, 1000–4200 cm2 V–1 s–1 for n-GaAs and 50–240 cm V–1 s–1 for p-GaAs depending on doping level. We conclude that the electronic quality of GaAs grown by close-spaced vapor transport is similar to that of GaAs made using conventional techniques and is thus sufficient for high-performance photovoltaic applications.

  17. Solar photovoltaics is considered as one of the most promising techniques for supplying clean, sustainable and renewable energy. II-VI and III-V semiconductor materials have attracted

    E-Print Network [OSTI]

    for developing economically viable photovoltaic (PV) thin-film solar cells. Using the approach of multilayer semiconductor quantum dots (QDs) and dilute-nitride GaAsN thin films grown by molecular beam epitaxy (MBE spacer layers grown on GaAs substrates, and dilute-nitride GaAsN thin films grown on GaAs substrates

  18. Cooperative Research Between NREL and Ampulse on III-V PV: Cooperative Research and Development Final Report, CRADA Number CRD-12-464

    SciTech Connect (OSTI)

    Ptak, A.

    2013-04-01

    NREL and Ampulse will engage in cooperative research to develop III-V photovoltaics on alternative substrates.

  19. 962 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 4, NO. 3, MAY 2014 Ultrabroadband and Wide-Angle Hybrid

    E-Print Network [OSTI]

    Bowers, John

    962 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 4, NO. 3, MAY 2014 Ultrabroadband and Wide-Angle Hybrid) are essential to realizing efficiency gains for state-of- the-art multijunction photovoltaic devices approach. Index Terms--Biomimetics, optical films, photovoltaic cells, III­V semiconductor materials. I

  20. Thin film photovoltaic device and process of manufacture

    DOE Patents [OSTI]

    Albright, Scot P. (Lakewood, CO); Chamberlin, Rhodes (El Paso, TX)

    1999-02-09

    Provided is a thin film photovoltaic device and a method of manufacturing the device. The thin film photovoltaic device comprises a film layer having particles which are smaller than about 30 microns in size held in an electrically insulating matrix material to reduce the potential for electrical shorting through the film layer. The film layer may be provided by depositing preformed particles onto a surrogate substrate and binding the particles in a film-forming matrix material to form a flexible sheet with the film layer. The flexible sheet may be separated from the surrogate substrate and cut into flexible strips. A plurality of the flexible strips may be located adjacent to and supported by a common supporting substrate to form a photovoltaic module having a plurality of electrically interconnected photovoltaic cells.

  1. Thin film photovoltaic device and process of manufacture

    DOE Patents [OSTI]

    Albright, Scot P. (Lakewood, CO); Chamberlin, Rhodes (El Paso, TX)

    1997-10-07

    Provided is a thin film photovoltaic device and a method of manufacturing the device. The thin film photovoltaic device comprises a film layer having particles which are smaller than about 30 microns in size held in an electrically insulating matrix material to reduce the potential for electrical shorting through the film layer. The film layer may be provided by depositing preformed particles onto a surrogate substrate and binding the particles in a film-forming matrix material to form a flexible sheet with the film layer. The flexible sheet may be separated from the surrogate substrate and cut into flexible strips. A plurality of the flexible strips may be located adjacent to and supported by a common supporting substrate to form a photovoltaic module having a plurality of electrically interconnected photovoltaic cells.

  2. Thin film photovoltaic device and process of manufacture

    DOE Patents [OSTI]

    Albright, S.P.; Chamberlin, R.

    1999-02-09

    Provided is a thin film photovoltaic device and a method of manufacturing the device. The thin film photovoltaic device comprises a film layer having particles which are smaller than about 30 microns in size held in an electrically insulating matrix material to reduce the potential for electrical shorting through the film layer. The film layer may be provided by depositing preformed particles onto a surrogate substrate and binding the particles in a film-forming matrix material to form a flexible sheet with the film layer. The flexible sheet may be separated from the surrogate substrate and cut into flexible strips. A plurality of the flexible strips may be located adjacent to and supported by a common supporting substrate to form a photovoltaic module having a plurality of electrically interconnected photovoltaic cells. 13 figs.

  3. Thin film photovoltaic device and process of manufacture

    DOE Patents [OSTI]

    Albright, S.P.; Chamberlin, R.

    1997-10-07

    Provided is a thin film photovoltaic device and a method of manufacturing the device. The thin film photovoltaic device comprises a film layer having particles which are smaller than about 30 microns in size held in an electrically insulating matrix material to reduce the potential for electrical shorting through the film layer. The film layer may be provided by depositing preformed particles onto a surrogate substrate and binding the particles in a film-forming matrix material to form a flexible sheet with the film layer. The flexible sheet may be separated from the surrogate substrate and cut into flexible strips. A plurality of the flexible strips may be located adjacent to and supported by a common supporting substrate to form a photovoltaic module having a plurality of electrically interconnected photovoltaic cells. 13 figs.

  4. Solid State Photovoltaic Research Branch

    SciTech Connect (OSTI)

    Not Available

    1990-09-01

    This report summarizes the progress of the Solid State Photovoltaic Research Branch of the Solar Energy Research Institute (SERI) from October 1, 1988, through September 30,l 1989. Six technical sections of the report cover these main areas of SERIs in-house research: Semiconductor Crystal Growth, Amorphous Silicon Research, Polycrystalline Thin Films, III-V High-Efficiency Photovoltaic Cells, Solid-State Theory, and Laser Raman and Luminescence Spectroscopy. Sections have been indexed separately for inclusion on the data base.

  5. EXAMINATION OF DISLOCATIONS IN LATTICE-MISMATCHED GaInAs/BUFFER LAYER/GaAs FOR III-V PHOTOVOLTAICS

    SciTech Connect (OSTI)

    Levander, A.; Geisz, J.

    2007-01-01

    Dislocations act as sites for nonradiative electron/hole pair recombination, which reduces the effi ciency of photovoltaics. Lattice-matched materials can be grown on top of one another without forming a high density of dislocations. However, when the growth of lattice-mismatched (LMM) materials is attempted, many dislocations result from the relaxation of strain in the crystal structure. In an attempt to reduce the number of dislocations that propagate into a solar device when using LMM materials, a compositionally step-graded buffer is placed between the two LMM materials. In order to confi ne the dislocations to the buffer layer and therefore increase material quality and device effi ciency, the growth temperature and thickness of the buffer layer were varied. A GaInP compositionally graded buffer and GaInAs p-n junction were grown on a GaAs substrate in a metal-organic chemical vapor deposition (MOCVD) system. A multibeam optical stress sensor (MOSS) and X-ray diffraction (XRD) were used to characterize the strain in the epilayers. Electrical and optoelectronic properties were measured using a probe station and multimeter setup, solar simulator, and a quantum effi ciency instrument. It was determined that device functionality was highly dependent on the growth temperature of the graded buffer. As growth temperature increased, so did the dislocation density in the device despite an increase in the dislocation velocity, which should have increased the dislocation annihilation rate and the diffusion of dislocations to the edge of the crystal. The thickness of the graded buffer also affected device effi ciency with thinner samples performing poorly. The thinner graded buffer layers had high internal resistances from reduced carrier concentrations. In terms of effi ciency, the empirically derived recipe developed by the scientists at the National Renewable Energy Laboratory (NREL) produced the highest quality cells.

  6. Recovery Act : Near-Single-Crystalline Photovoltaic Thin Films on Polycrystalline, Flexible Substrates

    SciTech Connect (OSTI)

    Venkat Selvamanickam; Alex Freundlich

    2010-11-29

    III-V photovoltaics have exhibited efficiencies above 40%, but have found only a limited use because of the high cost of single crystal substrates. At the other end of the spectrum, polycrystalline and amorphous thin film solar cells offer the advantage of low-cost fabrication, but have not yielded high efficiencies. Our program is based on single-crystalline-like thin film photovoltaics on polycrystalline substrates using biaxially-textured templates made by Ion Beam-Assisted Deposition (IBAD). MgO templates made by IBAD on flexible metal substrate have been successfully used for epitaxial growth of germanium films. In spite of a 4.5% lattice mismatch, heteroepitaxial growth of Ge was achieved on CeO2 that was grown on IBAD MgO template. Room temperature optical bandgap of the Ge films was identified at 0.67 eV indicating minimal residual strain. Refraction index and extinction coefficient values of the Ge films were found to match well with that measured from a reference Ge single crystal. GaAs has been successfully grown epitaxially on Ge on metal substrate by molecular beam epitaxy. RHEED patterns indicate self annihilation of antiphase boundaries and the growth of a single domain GaAs. The GaAs is found to exhibit strong photoluminescence signal and, an existence of a relatively narrow (FWHM~20 meV) band-edge excitons measured in this film indicates a good optoelectronic quality of deposited GaAs. While excellent epitaxial growth has been achieved in GaAs on flexible metal substrates, the defect density of the films as measured by High Resolution X-ray Diffraction and etch pit experiments showed a high value of 5 * 10^8 per cm^2. Cross sectional transmission electron microscopy of the multilayer architecture showed concentration of threading dislocations near the germanium-ceria interface. The defect density was found decrease as the Ge films were made thicker. The defects appear to originate from the MgO layer presumably because of large lattice mismatches between the various layers. The defect density in GaAs was reduced by a factor of five by adding a step of in-situ deposition of Ge by MBE on the sputtered Ge prior to GaAs growth. We have investigated device design strategies that would support development of high-efficiency devices in presence of dislocation densities of 10^8 cm^-2 present in our epitaxial GaAs films. Results from modeling work show that with a proper emitter, base and doping selection, the modeled efficiency of a GaAs cells with dislocation densities of 10^9 and 10^8 cm^-2 could be increased from 1% and 7% to 11% and 17% respectively. Under AM0, this single junction GaAs solar cell, has optimized value of emitter and base thickness of around 0.7 and 1.7 microns respectively, to give a maximum efficiency of 24.2%. We have fabricated complete GaAs solar cells using our Ge films on metal substrates. Pattern resolution of few microns with well-defined grid line of 30 microns has been realized on few cm square flexible templates. The ability to grow single-crystalline-like Ge films on flexible, polycrystalline substrates by reel-to-reel tape processing now provides an immense potential to fabricate high quality III-V photovoltaics on flexible, inexpensive substrates.

  7. 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 ...

  8. The state of the art of thin-film photovoltaics

    SciTech Connect (OSTI)

    Surek, T.

    1993-10-01

    Thin-film photovoltaic technologies, based on materials such as amorphous or polycrystalline silicon, copper indium diselenide, cadmium telluride, and gallium arsenide, offer the potential for significantly reducing the cost of electricity generated by photovoltaics. The significant progress in the technologies, from the laboratory to the marketplace, is reviewed. The common concerns and questions raised about thin films are addressed. Based on the progress to date and the potential of these technologies, along with continuing investments by the private sector to commercialize the technologies, one can conclude that thin-film PV will provide a competitive alternative for large-scale power generation in the future.

  9. Infiltrating Semiconducting Polymers into Self-Assembled Mesoporous Titania Films for Photovoltaic Applications**

    E-Print Network [OSTI]

    McGehee, Michael

    Infiltrating Semiconducting Polymers into Self-Assembled Mesoporous Titania Films for Photovoltaic. Introduction A promising approach for making inexpensive photovoltaic cells is to fill nanoporous titania films there have been several reports on photovoltaic cells made in this way, there have been no studies that show

  10. Bill Shafarman 1 May 15, 2013 Thin Film Photovoltaics Research at the

    E-Print Network [OSTI]

    Firestone, Jeremy

    Bill Shafarman 1 May 15, 2013 Thin Film Photovoltaics Research at the Institute of Energy of Photovoltaics 2. IEC: History and Capabilities 3. Current Research at IEC #12;Bill Shafarman 2 May 15, 2013 Concentrators #12;Bill Shafarman 5 May 15, 2013 Thin Film Photovoltaics Potential for low cost PV using " a

  11. Sputtered Thin Film Photovoltaics - Energy Innovation Portal

    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 AdministrationRobust,Field-effect Photovoltaics -7541C.3 SpecialSponsor Guidelines CandidatesSpringSolar

  12. Gigahertz surface acoustic wave generation on ZnO thin films deposited by radio frequency magnetron sputtering on III-V semiconductor

    E-Print Network [OSTI]

    Ham, Donhee

    Gigahertz surface acoustic wave generation on ZnO thin films deposited by radio frequency magnetron demonstrate 1.6 GHz surface acoustic wave SAW generation using interdigital transducers patterned by e-8601, Japan Received 10 July 2008; accepted 8 September 2008; published 3 November 2008 The authors

  13. 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

    in Photocatalysis and Photovoltaics A Thesis submitted inFilms in Photocatalysis and Photovoltaics by Andrew Zelinskiinvestigated for use in photovoltaics and as photocatalysts,

  14. 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

  15. 23 6 12 8:00 III-V/Ge CMOS

    E-Print Network [OSTI]

    Katsumoto, Shingo

    23 6 12 8:00 - 1 - 1. : III-V/Ge CMOS ~ 200%~ 2. : III-V (Ge) III-V/Ge CMOS (Si) 200% III-V/Ge CMOS 200% III-V/Ge CMOS () () () () III-V III-V/Ge CMOS (1) III-V Ge III-V/Ge CMOS (2) III-V-OI MOSFET (3) III-V/Ge CMOS "2011 Symposia on VLSI

  16. Electrochromic-photovoltaic film for light-sensitive control of optical transmittance

    DOE Patents [OSTI]

    Branz, H.M.; Crandall, R.S.; Tracy, C.E.

    1994-12-27

    A variable transmittance optical component includes an electrochromic material and a photovoltaic device-type thin film solar cell deposited in a tandem type, monolithic single coating over the component. A bleed resistor of a predetermined value is connected in series across the electrochromic material and photovoltaic device controlling the activation and deactivation of the electrochromic material. The electrical conductivity between the electrochromic material and the photovoltaic device is enhanced by interposing a transparent electrically conductive layer. 5 figures.

  17. Electrochromic-photovoltaic film for light-sensitive control of optical transmittance

    DOE Patents [OSTI]

    Branz, Howard M. (Boulder, CO); Crandall, Richard S. (Golden, CO); Tracy, C. Edwin (Golden, CO)

    1994-01-01

    A variable transmittance optical component includes an electrochromic material and a photovoltaic device-type thin film solar cell deposited in a tandem type, monolithic single coating over the component. A bleed resistor of a predetermined value is connected in series across the electrochromic material and photovoltaic device controlling the activation and deactivation of the electrochromic material. The electrical conductivity between the electrochromic material and the photovoltaic device is enhanced by interposing a transparent electrically conductive layer.

  18. Method and apparatus for increasing the durability and yield of thin film photovoltaic devices

    DOE Patents [OSTI]

    Phillips, James E. (Newark, DE); Lasswell, Patrick G. (Newark, DE)

    1987-01-01

    Thin film photovoltaic cells having a pair of semiconductor layers between an opaque and a transparent electrical contact are manufactured in a method which includes the step of scanning one of the semiconductor layers to determine the location of any possible shorting defect. Upon the detection of such defect, the defect is eliminated to increase the durability and yield of the photovoltaic device.

  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. Preparation of III-V semiconductor nanocrystals

    DOE Patents [OSTI]

    Alivisatos, A.P.; Olshavsky, M.A.

    1996-04-09

    Nanometer-scale crystals of III-V semiconductors are disclosed. They are prepared by reacting a group III metal source with a group V anion source in a liquid phase at elevated temperature in the presence of a crystallite growth terminator such as pyridine or quinoline. 4 figs.

  1. Thin film heterojunction photovoltaic cells and methods of making the same

    DOE Patents [OSTI]

    Basol, Bulent M. (Los Angeles, CA); Tseng, Eric S. (Los Angeles, CA); Rod, Robert L. (Los Angeles, CA)

    1983-06-14

    A method of fabricating a thin film heterojunction photovoltaic cell which comprises depositing a film of a near intrinsic or n-type semiconductor compound formed of at least one of the metal elements of Class II B of the Periodic Table of Elements and at least tellurium and then heating said film at a temperature between about 250.degree. C. and 500.degree. C. for a time sufficient to convert said film to a suitably low resistivity p-type semiconductor compound. Such film may be deposited initially on the surface of an n-type semiconductor substrate. Alternatively, there may be deposited on the converted film a layer of n-type semiconductor compound different from the film semiconductor compound. The resulting photovoltaic cell exhibits a substantially increased power output over similar cells not subjected to the method of the present invention.

  2. PROJECT PROFILE: High-resolution Investigations of Transport Limiting Defects and Interfaces in Thin-Film Photovoltaic Devices

    Broader source: Energy.gov [DOE]

    This project will develop the capability of high-resolution transport imaging in photovoltaic (PV) devices, which is useful for improving polycrystalline thin-film PV materials.

  3. Method and apparatus for increasing the durability and yield of thin film photovoltaic devices

    DOE Patents [OSTI]

    Phillips, J.E.; Lasswell, P.G.

    1987-02-03

    Thin film photovoltaic cells having a pair of semiconductor layers between an opaque and a transparent electrical contact are manufactured in a method which includes the step of scanning one of the semiconductor layers to determine the location of any possible shorting defect. Upon the detection of such defect, the defect is eliminated to increase the durability and yield of the photovoltaic device. 10 figs.

  4. Flexible Ultra Moisture Barrier Film for Thin-Film Photovoltaic Applications

    SciTech Connect (OSTI)

    David M. Dean

    2012-10-30

    Flexible Thin-film photovoltaic (TFPV) is a low cost alternative to incumbent c-Si PV products as it requires less volume of costly semiconductor materials and it can potentially reduce installation cost. Among the TFPV options, copper indium gallium diselenide (CIGS) has the highest efficiency and is believed to be one of the most attractive candidates to achieve PV cost reduction. However, CIGS cells are very moisture sensitive and require module water vapor transmission rate (WVTR) of less than 1x10-4 gram of water per square meter per day (g-H2O/m2/day). Successful development and commercialization of flexible transparent ultra moisture barrier film is the key to enable flexible CIGS TFPV products, and thus enable ultimate PV cost reduction. At DuPont, we have demonstrated at lab scale that we can successfully make polymer-based flexible transparent ultra moisture barrier film by depositing alumina on polymer films using atomic layer deposition (ALD) technology. The layer by layer ALD approach results in uniform and amorphous structure which effectively reduces pinhole density of the inorganic coating on the polymer, and thus allow the fabrication of flexible barrier film with WVTR of 10-5 g-H2O/m2/day. Currently ALD is a time-consuming process suitable only for high-value, relatively small substrates. To successfully commercialize the ALD-on-plastic technology for the PV industry, there is the need to scale up this technology and improve throughput. The goal of this contract work was to build a prototype demonstrating that the ALD technology could be scaled-up for commercial use. Unfortunately, the prototype failed to produce an ultra-barrier film by the close of the project.

  5. Thin Film Materials and Processing Techniques for a Next Generation Photovoltaic Device: Cooperative Research and Development Final Report, CRADA Number CRD-12-470

    SciTech Connect (OSTI)

    van Hest, M.

    2013-08-01

    This research extends thin film materials and processes relevant to the development and production of a next generation photovoltaic device.

  6. Method for producing textured substrates for thin-film photovoltaic cells

    DOE Patents [OSTI]

    Lauf, Robert J. (Oak Ridge, TN)

    1994-01-01

    The invention pertains to the production of ceramic substrates used in the manufacture of thin-film photovoltaic cells used for directly converting solar energy to electrical energy. Elongated ribbon-like sheets of substrate precursor containing a mixture of ceramic particulates, a binder, and a plasticizer are formed and then while green provided with a mechanically textured surface region used for supporting the thin film semiconductor of the photovoltaic cell when the sheets of the substrate precursor are subsequently cut into substrate-sized shapes and then sintered. The textured surface pattern on the substrate provides enhanced light trapping and collection for substantially increasing the solar energy conversion efficiency of thin-film photovoltaic cells.

  7. Method for producing textured substrates for thin-film photovoltaic cells

    DOE Patents [OSTI]

    Lauf, Robert J. (Oak Ridge, TN)

    1996-01-01

    The invention pertains to the production of ceramic substrates used in the manufacture of thin-film photovoltaic cells used for directly converting solar energy to electrical energy. Elongated ribbon-like sheets of substrate precursor containing a mixture of ceramic particulates, a binder, and a plasticizer are formed and then while green provided with a mechanically textured surface region used for supporting the thin film semiconductor of the photovoltaic cell when the sheets of the substrate precursor are subsequently cut into substrate-sized shapes and then sintered. The textured surface pattern on the substrate provides enhanced light trapping and collection for substantially increasing the, solar energy conversion efficiency of thin-film photovoltaic cells.

  8. Method for producing textured substrates for thin-film photovoltaic cells

    DOE Patents [OSTI]

    Lauf, R.J.

    1994-04-26

    The invention pertains to the production of ceramic substrates used in the manufacture of thin-film photovoltaic cells used for directly converting solar energy to electrical energy. Elongated ribbon-like sheets of substrate precursor containing a mixture of ceramic particulates, a binder, and a plasticizer are formed and then while green provided with a mechanically textured surface region used for supporting the thin film semiconductor of the photovoltaic cell when the sheets of the substrate precursor are subsequently cut into substrate-sized shapes and then sintered. The textured surface pattern on the substrate provides enhanced light trapping and collection for substantially increasing the solar energy conversion efficiency of thin-film photovoltaic cells. 4 figures.

  9. Method for producing textured substrates for thin-film photovoltaic cells

    DOE Patents [OSTI]

    Lauf, R.J.

    1996-04-02

    The invention pertains to the production of ceramic substrates used in the manufacture of thin-film photovoltaic cells used for directly converting solar energy to electrical energy. Elongated ribbon-like sheets of substrate precursor containing a mixture of ceramic particulates, a binder, and a plasticizer are formed and then while green provided with a mechanically textured surface region used for supporting the thin film semiconductor of the photovoltaic cell when the sheets of the substrate precursor are subsequently cut into substrate-sized shapes and then sintered. The textured surface pattern on the substrate provides enhanced light trapping and collection for substantially increasing the, solar energy conversion efficiency of thin-film photovoltaic cells. 4 figs.

  10. NREL: Photovoltaics Research - III-V Multijunction Materials and Devices

    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 NewsInformationJessework usesof EnergyY-12Working withPhoto of1855

  11. Photovoltaic devices comprising cadmium stannate transparent conducting films and method for making

    DOE Patents [OSTI]

    Wu, X.; Coutts, T.J.; Sheldon, P.; Rose, D.H.

    1999-07-13

    A photovoltaic device is disclosed having a substrate, a layer of Cd[sub 2]SnO[sub 4] disposed on said substrate as a front contact, a thin film comprising two or more layers of semiconductor materials disposed on said layer of Cd[sub 2]SnO[sub 4], and an electrically conductive film disposed on said thin film of semiconductor materials to form a rear electrical contact to said thin film. The device is formed by RF sputter coating a Cd[sub 2]SnO[sub 4] layer onto a substrate, depositing a thin film of semiconductor materials onto the layer of Cd[sub 2]SnO[sub 4], and depositing an electrically conductive film onto the thin film of semiconductor materials. 10 figs.

  12. Back contact to film silicon on metal for photovoltaic cells

    DOE Patents [OSTI]

    Branz, Howard M.; Teplin, Charles; Stradins, Pauls

    2013-06-18

    A crystal oriented metal back contact for solar cells is disclosed herein. In one embodiment, a photovoltaic device and methods for making the photovoltaic device are disclosed. The photovoltaic device includes a metal substrate with a crystalline orientation and a heteroepitaxial crystal silicon layer having the same crystal orientation of the metal substrate. A heteroepitaxial buffer layer having the crystal orientation of the metal substrate is positioned between the substrate and the crystal silicon layer to reduce diffusion of metal from the metal foil into the crystal silicon layer and provide chemical compatibility with the heteroepitaxial crystal silicon layer. Additionally, the buffer layer includes one or more electrically conductive pathways to electrically couple the crystal silicon layer and the metal substrate.

  13. High efficiency thin-film multiple-gap photovoltaic device

    DOE Patents [OSTI]

    Dalal, Vikram L. (Newark, DE)

    1983-01-01

    A photovoltaic device includes at least two solar cells made from Group IV elements or their alloys in the amorphous state mounted on a substrate. The outermost or first cell has a larger bandgap than the second cell. Various techniques are utilized to improve the efficiency of the device.

  14. NREL: Photovoltaics Research - Polycrystalline Thin-Film Materials and

    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 NewsInformationJessework usesof EnergyY-12Working withPhotoPhotovoltaic

  15. Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems

    E-Print Network [OSTI]

    Zhang, Teresa Weirui

    2011-01-01

    installed power from photovoltaic systems worldwide fromphotovoltaic systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .times than bulk Si photovoltaic systems. . . Comparison of

  16. Photoluminescence-based quality control for thin film absorber layers of photovoltaic devices

    DOE Patents [OSTI]

    Repins, Ingrid L.; Kuciauskas, Darius

    2015-07-07

    A time-resolved photoluminescence-based system providing quality control during manufacture of thin film absorber layers for photovoltaic devices. The system includes a laser generating excitation beams and an optical fiber with an end used both for directing each excitation beam onto a thin film absorber layer and for collecting photoluminescence from the absorber layer. The system includes a processor determining a quality control parameter such as minority carrier lifetime of the thin film absorber layer based on the collected photoluminescence. In some implementations, the laser is a low power, pulsed diode laser having photon energy at least great enough to excite electron hole pairs in the thin film absorber layer. The scattered light may be filterable from the collected photoluminescence, and the system may include a dichroic beam splitter and a filter that transmit the photoluminescence and remove scattered laser light prior to delivery to a photodetector and a digital oscilloscope.

  17. Photovoltaic device having light transmitting electrically conductive stacked films

    DOE Patents [OSTI]

    Weber, Michael F. (St. Paul, MN); Tran, Nang T. (St. Paul, MN); Jeffrey, Frank R. (St. Paul, MN); Gilbert, James R. (St. Paul, MN); Aspen, Frank E. (St. Paul, MN)

    1990-07-10

    A light transmitting electrically conductive stacked film, useful as a light transmitting electrode, including a first light transmitting electrically conductive layer, having a first optical thickness, a second light transmitting layer, having a second optical thickness different from the optical thickness of the first layer, and an electrically conductive metallic layer interposed between and in initimate contact with the first and second layers.

  18. The prospects for 10 nm III-V CMOS

    E-Print Network [OSTI]

    del Alamo, Jesus A.

    The increasing difficulties for further scaling down of Si CMOS is bringing to the fore the investigation of alternative channel materials. Among these, III-V compound semiconductors are very attractive due to their ...

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

    E-Print Network [OSTI]

    Brown, Gregory Ferguson

    2011-01-01

    Generation  Photovoltaics:  Advanced  Solar  Energy  be  achieved  through  photovoltaics  (solar  cells).    Photovoltaics     There  are  two  requirements  for  designing  a  high  efficiency  solar  

  20. Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems

    E-Print Network [OSTI]

    Zhang, Teresa Weirui

    2011-01-01

    microcrystalline- silicon photovoltaic cell, B) range ofpayback of roof mounted photovoltaic cells. Boustead, I. andmicrocrystalline-silicon photovoltaic cell, B) range of

  1. Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems

    E-Print Network [OSTI]

    Zhang, Teresa Weirui

    2011-01-01

    installed power from photovoltaic systems worldwide fromBest research photovoltaic efficiencies (Kazmerski,as a function of time for numerous types of photovoltaic

  2. Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems

    E-Print Network [OSTI]

    Zhang, Teresa Weirui

    2011-01-01

    of pv systems. Progress in Photovoltaics: Research andpv system flatcon. Progress in Photovoltaics: Research andmw pv installation. Progress in Photovoltaics: Research and

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

    E-Print Network [OSTI]

    Brown, Gregory Ferguson

    2011-01-01

    Third   Generation  Photovoltaics:  Advanced  Solar  R.   Noufi,  Prog.  Photovoltaics  16,  235-­?239  (2008).  M.  Green,  Prog.  Photovoltaics  17,  183-­?189  (2009).  

  4. Aerosol Spray Pyrolysis Synthesis of CZTS Nanostructures for Photovoltaic Applications

    E-Print Network [OSTI]

    Exarhos, Stephen

    2015-01-01

    Eventually a full photovoltaic cell can be constructed based20.8%. ” 29th European Photovoltaic Solar Energy ConferenceFilms, Thin Film Chalogenide Photovoltaic Materials (EMRS,

  5. Electrodeposition of Zn based nanostructure thin films for photovoltaic applications

    SciTech Connect (OSTI)

    Al-Bat’hi, S. A. M.

    2015-03-30

    We present here a systematic study on the synthesis thin films of various ZnO, CdO, Zn{sub x}Cd{sub 1-x} (O) and ZnTe nanostructures by electrodeposition technique with ZnCl{sub 2,} CdCl{sub 2} and ZnSO{sub 4} solution as starting reactant. Several reaction parameters were examined to develop an optimal procedure for controlling the size, shape, and surface morphology of the nanostructure. The results showed that the morphology of the products can be carefully controlled through adjusting the concentration of the electrolyte. The products present well shaped Nanorods arrays at specific concentration and temperature. UV-VIS spectroscopy and X-ray diffraction results show that the product presents good crystallinity. A possible formation process has been proposed.

  6. DISSERTATION DEVICE CHARACTERIZATION OF CADMIUM TELLURIDE PHOTOVOLTAICS

    E-Print Network [OSTI]

    Sites, James R.

    DISSERTATION DEVICE CHARACTERIZATION OF CADMIUM TELLURIDE PHOTOVOLTAICS Submitted by Russell M Reserved #12;ABSTRACT DEVICE CHARACTERIZATION OF CADMIUM TELLURIDE PHOTOVOLTAICS Thin-film photovoltaics

  7. Method for making photovoltaic devices using oxygenated semiconductor thin film layers

    DOE Patents [OSTI]

    Johnson, James Neil; Albin, David Scott; Feldman-Peabody, Scott; Pavol, Mark Jeffrey; Gossman, Robert Dwayne

    2014-12-16

    A method for making a photovoltaic device is presented. The method includes steps of disposing a window layer on a substrate and disposing an absorber layer on the window layer. Disposing the window layer, the absorber layer, or both layers includes introducing a source material into a deposition zone, wherein the source material comprises oxygen and a constituent of the window layer, of the absorber layer or of both layers. The method further includes step of depositing a film that comprises the constituent and oxygen.

  8. Thermal and Electrical Effects of Partial Shade in Monolithic Thin-Film Photovoltaic Modules: Preprint

    SciTech Connect (OSTI)

    Silverman, Timothy J.; Deceglie, Michael G.; Sun, Xingshu; Garris, Rebekah L.; Alam, Muhammad Ashraful; Deline, Chris; Kurtz, Sarah

    2015-09-02

    Photovoltaic cells can be damaged by reverse bias stress, which arises during service when a monolithically integrated thin-film module is partially shaded. We introduce a model for describing a module's internal thermal and electrical state, which cannot normally be measured. Using this model and experimental measurements, we present several results with relevance for reliability testing and module engineering: Modules with a small breakdown voltage experience less stress than those with a large breakdown voltage, with some exceptions for modules having light-enhanced reverse breakdown. Masks leaving a small part of the masked cells illuminated can lead to very high temperature and current density compared to masks covering entire cells.

  9. Metastable Changes to the Temperature Coefficients of Thin-Film Photovoltaic Modules

    SciTech Connect (OSTI)

    Deceglie, M. G.; Silverman, T. J.; Marion, B.; Kurtz, S. R.

    2014-07-01

    Transient changes in the performance of thin-film modules with light exposure are a well-known and widely reported phenomenon. These changes are often the result of reversible metastabilities rather than irreversible changes. Here we consider how these metastable changes affect the temperature dependence of photovoltaic performance. We find that in CIGS modules exhibiting a metastable increase in performance with light exposure, the light exposure also induces an increase in the magnitude of the temperature coefficient. It is important to understand such changes when characterizing temperature coefficients and when analyzing the outdoor performance of newly installed modules.

  10. Low Cost Thin Film Building-Integrated Photovoltaic Systems

    SciTech Connect (OSTI)

    Dr. Subhendu Guha; Dr. Jeff Yang

    2012-05-25

    The goal of the program is to develop 'LOW COST THIN FILM BUILDING-INTEGRATED PV SYSTEMS'. Major focus was on developing low cost solution for the commercial BIPV and rooftop PV market and meet DOE LCOE goal for the commercial market segment of 9-12 cents/kWh for 2010 and 6-8 cents/kWh for 2015. We achieved the 2010 goal and were on track to achieve the 2015 goal. The program consists of five major tasks: (1) modules; (2) inverters and BOS; (3) systems engineering and integration; (4) deployment; and (5) project management and TPP collaborative activities. We successfully crossed all stage gates and surpassed all milestones. We proudly achieved world record stable efficiencies in small area cells (12.56% for 1cm2) and large area encapsulated modules (11.3% for 800 cm2) using a triple-junction amorphous silicon/nanocrystalline silicon/nanocrystalline silicon structure, confirmed by the National Renewable Energy Laboratory. We collaborated with two inverter companies, Solectria and PV Powered, and significantly reduced inverter cost. We collaborated with three universities (Syracuse University, University of Oregon, and Colorado School of Mines) and National Renewable Energy Laboratory, and improved understanding on nanocrystalline material properties and light trapping techniques. We jointly published 50 technical papers in peer-reviewed journals and International Conference Proceedings. We installed two 75kW roof-top systems, one in Florida and another in New Jersey demonstrating innovative designs. The systems performed satisfactorily meeting/exceeding estimated kWh/kW performance. The 50/50 cost shared program was a great success and received excellent comments from DOE Manager and Technical Monitor in the Final Review.

  11. 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

  12. Producing thin film photovoltaic modules with high integrity interconnects and dual layer contacts

    DOE Patents [OSTI]

    Jansen, Kai W. (Lawrenceville, NJ); Maley, Nagi (Exton, PA)

    2001-01-01

    High performance photovoltaic modules are produced with improved interconnects by a special process. Advantageously, the photovoltaic modules have a dual layer back (rear) contact and a front contact with at least one layer. The front contact and the inner layer of the back contact can comprise a transparent conductive oxide. The outer layer of the back contact can comprise a metal or metal oxide. The front contact can also have a dielectric layer. In one form, the dual layer back contact comprises a zinc oxide inner layer and an aluminum outer layer and the front contact comprises a tin oxide inner layer and a silicon dioxide dielectric outer layer. One or more amorphous silicon-containing thin film semiconductors can be deposited between the front and back contacts. The contacts can be positioned between a substrate and an optional superstrate. During production, the transparent conductive oxide layer of the front contact is scribed by a laser, then the amorphous silicon-containing semiconductors and inner layer of the dual layer back contact are simultaneously scribed and trenched (drilled) by the laser and the trench is subsequently filled with the same metal as the outer layer of the dual layer back contact to provide a superb mechanical and electrical interconnect between the front contact and the outer layer of the dual layer back contact. The outer layer of the dual layer back contact can then be scribed by the laser. For enhanced environmental protection, the photovoltaic modules can be encapsulated.

  13. Producing thin film photovoltaic modules with high integrity interconnects and dual layer contacts

    DOE Patents [OSTI]

    Jansen, Kai W. (Lawrenceville, NJ); Maley, Nagi (Exton, PA)

    2000-01-01

    High performance photovoltaic modules are produced with improved interconnects by a special process. Advantageously, the photovoltaic modules have a dual layer back (rear) contact and a front contact with at least one layer. The front contact and the inner layer of the back contact can comprise a transparent conductive oxide. The outer layer of the back contact can comprise a metal or metal oxide. The front contact can also have a dielectric layer. In one form, the dual layer back contact comprises a zinc oxide inner layer and an aluminum outer layer and the front contact comprises a tin oxide inner layer and a silicon dioxide dielectric outer layer. One or more amorphous silicon-containing thin film semiconductors can be deposited between the front and back contacts. The contacts can be positioned between a substrate and an optional superstrate. During production, the transparent conductive oxide layer of the front contact is scribed by a laser, then the amorphous silicon-containing semiconductors and inner layer of the dual layer back contact are simultaneously scribed and trenched (drilled) by the laser and the trench is subsequently filled with the same metal as the outer layer of the dual layer back contact to provide a superb mechanical and electrical interconnect between the front contact and the outer layer of the dual layer back contact. The outer layer of the dual layer back contact can then be scribed by the laser. For enhanced environmental protection, the photovoltaic modules can be encapsulated.

  14. Non-Epitaxial Thin-Film Indium Phosphide Photovoltaics: Growth, Devices, and Cost Analysis

    E-Print Network [OSTI]

    Zheng, Maxwell S

    2015-01-01

    Bosi and C. Pelosi, Progress in Photovoltaics: Research and1.1 S OLAR ENERGY AND PHOTOVOLTAICS Compared to all otherwiki/Growth_of_photovoltaics 7. http://www.solarnews.es/

  15. Outdoor Performance of a Thin-Film Gallium-Arsenide Photovoltaic Module

    SciTech Connect (OSTI)

    Silverman, T. J.; Deceglie, M. G.; Marion, B.; Cowley, S.; Kayes, B.; Kurtz, S.

    2013-06-01

    We deployed a 855 cm2 thin-film, single-junction gallium arsenide (GaAs) photovoltaic (PV) module outdoors. Due to its fundamentally different cell technology compared to silicon (Si), the module responds differently to outdoor conditions. On average during the test, the GaAs module produced more power when its temperature was higher. We show that its maximum-power temperature coefficient, while actually negative, is several times smaller in magnitude than that of a Si module used for comparison. The positive correlation of power with temperature in GaAs is due to temperature-correlated changes in the incident spectrum. We show that a simple correction based on precipitable water vapor (PWV) brings the photocurrent temperature coefficient into agreement with that measured by other methods and predicted by theory. The low operating temperature and small temperature coefficient of GaAs give it an energy production advantage in warm weather.

  16. Dopant Profiling of III-V Nanostructures for Electronic Applications

    E-Print Network [OSTI]

    Ford, Alexandra Caroline

    2011-01-01

    and/or large-area, flexible electronics (Figure 1).mechanically flexible macro-electronics and photovoltaics

  17. Design of scaled electronic devices based on III-V materials

    E-Print Network [OSTI]

    Wang, Lingquan

    2009-01-01

    superior III-V semiconductor material properties, namely theproperties and material versatility of the III-V semiconductormaterial properties, i.e. the electronic structure. Conventional treatment of semiconductor

  18. Method of fabricating vertically aligned group III-V nanowires

    DOE Patents [OSTI]

    Wang, George T; Li, Qiming

    2014-11-25

    A top-down method of fabricating vertically aligned Group III-V micro- and nanowires uses a two-step etch process that adds a selective anisotropic wet etch after an initial plasma etch to remove the dry etch damage while enabling micro/nanowires with straight and smooth faceted sidewalls and controllable diameters independent of pitch. The method enables the fabrication of nanowire lasers, LEDs, and solar cells.

  19. Structure-Function Relationships in Semiconducting Polymers for Organic Photovoltaics

    E-Print Network [OSTI]

    Kavulak, David Fredric Joel

    2010-01-01

    film transistors 1-4 and photovoltaic cells. 5-9 Among thesePhotovoltaic Cell .the materials, all photovoltaic cells operate on the basic

  20. III-V Growth on Silicon Toward a Multijunction Cell

    SciTech Connect (OSTI)

    Geisz, J.; Olson, J.; McMahon, W.; Friedman, D.; Kibbler, A.; Kramer, C.; Young, M.; Duda, A.; Ward, S.; Ptak, A.; Kurtz, S.; Wanlass, M.; Ahrenkiel, P.; Jiang, C. S.; Moutinho, H.; Norman, A.; Jones, K.; Romero, M.; Reedy, B.

    2005-11-01

    A III-V on Si multijunction solar cell promises high efficiency at relatively low cost. The challenges to epitaxial growth of high-quality III-Vs on Si, though, are extensive. Lattice-matched (LM) dilute-nitride GaNPAs solar cells have been grown on Si, but their performance is limited by defects related to the nitrogen. Advances in the growth of lattice-mismatched (LMM) materials make more traditional III-Vs, such as GaInP and GaAsP, very attractive for use in multijunction solar cells on silicon.

  1. Biaxial texturing of inorganic photovoltaic thin films using low energy ion beam irradiation during growth

    SciTech Connect (OSTI)

    Groves, James R; De Paula, Raymond F; Hayes, Garrett H; Li, Joel B; Hammond, Robert H; Salleo, Alberto; Clemens, Bruce M

    2010-05-07

    We describe our efforts to control the grain boundary alignment in polycrystalline thin films of silicon by using a biaxially textured template layer of CaF{sub 2} for photovoltaic device applications. We have chosen CaF{sub 2} as a candidate material due to its close lattice match with silicon and its suitability as an ion beam assisted deposition (mAD) material. We show that the CaF{sub 2} aligns biaxially at a thickness of {approx}10 nm and, with the addition of an epitaxial CaF{sub 2} layer, has an in-plane texture of {approx}15{sup o}. Deposition of a subsequent layer of Si aligns on the template layer with an in-plane texture of 10.8{sup o}. The additional improvement of in-plane texture is similar to the behavior observed in more fully characterized IBAD materials systems. A germanium buffer layer is used to assist in the epitaxial deposition of Si on CaF{sub 2} template layers and single crystal substrates. These experiments confirm that an mAD template can be used to biaxially orient polycrystalline Si.

  2. 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

  3. Carbon doping of III-V compound semiconductors

    SciTech Connect (OSTI)

    Moll, A.J.

    1994-09-01

    Focus of the study is C acceptor doping of GaAs, since C diffusion coefficient is at least one order of magnitude lower than that of other common p-type dopants in GaAs. C ion implantation results in a concentration of free holes in the valence band < 10% of that of the implanted C atoms for doses > 10{sup 14}/cm{sup 2}. Rutherford backscattering, electrical measurements, Raman spectroscopy, and Fourier transform infrared spectroscopy were amonth the techniques used. Ga co-implantation increased the C activation in two steps: first, the additional radiation damage creates vacant As sites that the implanted C can occupy, and second, it maintains the stoichiometry of the implanted layer, reducing the number of compensating native defects. In InP, the behavior of C was different from that in GaAs. C acts as n-type dopant in the In site; however, its incorporation by implantation was difficult to control; experiments using P co-implants were inconsistent. The lattice position of inactive C in GaAs in implanted and epitaxial layers is discussed; evidence for formation of C precipitates in GaAs and InP was found. Correlation of the results with literature on C doping in III-V semiconductors led to a phenomenological description of C in III-V compounds (particularly GaAs): The behavior of C is controlled by the chemical nature of C and the instrinsic Fermi level stabilization energy of the material.

  4. Towards low-cost high-efficiency GaAs photovoltaics and photoelectrodes grown via vapor transport from a solid source

    SciTech Connect (OSTI)

    Boucher, Jason; Ritenour, Andrew; Boettcher, Shannon W.

    2013-04-29

    Towards low-cost high-efficiency GaAs photovoltaics and photoelectrodes grown via vapor transport from a solid source GaAs is an attractive material for thin-film photovoltaic applications, but is not widely used for terrestrial power generation due to the high cost of metal-organic chemical vapor deposition (MOCVD) techniques typically used for growth. Close space vapor transport is an alternative that allows for rapid growth rates of III-V materials, and does not rely on the toxic and pyrophoric precursors used in MOCVD. We characterize CSVT films of GaAs using photoelectrochemical current-voltage and quantum efficiency measurements. Hole diffusion lengths which exceed 1.5 um are extracted from internal quantum efficiency measurements using the Gartner model. Device physics simulations suggest that solar cells based on these films could reach efficiencies exceeding 24 %. To reach this goal, a more complete understanding of the electrical properties and characterization of defects will be necessary, including measurements on complete solid-state devices. Doping of films is achieved by using source material containing the desired impurity (e.g., Te or Zn). We discuss strategies for growing III-V materials on inexpensive substrates that are not lattice-matched to GaAs.

  5. Three approaches to economical photovoltaics: conformal Cu2S, organic luminescent films, and PbSe nanocrystal superlattices

    E-Print Network [OSTI]

    Carbone, Ian Anthony

    2013-01-01

    on grid-parity. Progress in Photovoltaics: Research andcells: an overview. Progress in Photovoltaics: Research andtracing simulations. Progress in Photovoltaics: Research and

  6. Three approaches to economical photovoltaics: conformal Cu2S, organic luminescent films, and PbSe nanocrystal superlattices

    E-Print Network [OSTI]

    Carbone, Ian Anthony

    2013-01-01

    approaches to economical photovoltaics: conformal Cu 2 S,routes to more efficient photovoltaics using conformal Cu 2on grid-parity. Progress in Photovoltaics: Research and

  7. Effect of Sputtering Gas environments on the Properties of Aluminum-doped Zinc Oxide Thin Films for Photovoltaic Application

    SciTech Connect (OSTI)

    Chauhan, Ram Narayan; Kumar, Jitendra [Materials Science Programme, Indian Institute of Technology Kanpur, Kanpur-208016 (India); Singh, C.; Anand, R. S. [Electrical Engineering Department, Indian Institute of Technology Kanpur, Kanpur-208016 (India)

    2011-10-20

    Aluminum-doped zinc oxide thin films have been deposited on glass substrates by R.F. sputtering using ZnO(98%)-Al{sub 2}O{sub 3}(2%) target in different sputtering gaseous environments, viz., Ar, Ar/O{sub 2} and Ar/N{sub 2}+H{sub 2} at 80 deg. C. These films have been studied with regard to phase, microstructure, optical absorption and sheet resistance for application in photovoltaic devices as transparent conducting electrodes. The properties of the films are shown to strongly depend on the sputtering gas(es). The films exhibit a wurtzite-type hexagonal structure with the (00.2) preferred orientation, the c-axis perpendicular to the substrate. The intensity of 00.2 diffraction peak and the average crystallite size remain almost the same when the films are prepared under pure Ar or Ar/O{sub 2} environment. However the average crystallite size increases while electrical resistance decreases with introduction of nitrogen and hydrogen in comparison to oxygen in argon. Nevertheless, the optimum value of optical transmittance and sheet resistance of the films deposited in pure argon are found to be 85-96% in the wavelength range 400-800 nm and 65 {Omega}/{open_square}, respectively.

  8. High-efficiency thin-film cadmium telluride photovoltaic cells. Annual technical report, January 20, 1996--January 19, 1997

    SciTech Connect (OSTI)

    Compaan, A.D.; Bohn, R.G.; Contreras-Puente, G. [Univ. of Toledo, OH (United States)] [Univ. of Toledo, OH (United States)

    1997-08-01

    The University of Toledo photovoltaics group has been instrumental in developing rf sputtering for CDs/CdTe thin-film solar cells. During the third phase of the present contract our work focussed on efforts to determine factors which limit the efficiency in our {open_quotes}all-sputtered{close_quotes} thin-film CdTe solar cells on soda-lime glass. We find that our all-sputtered cells, which are deposited at substantially lower temperature than those by sublimation or vapor deposition, require less aggressive CdCl{sub 2} treatments than do other deposition techniques and this is presumably related to CDs/CdTe interdiffusion. The CDs/CdTe interdiffusion process has been studied by several methods, including photoluminescence and capacitance-voltage measurements. Furthermore, we have deposited special thin bilayer films on quartz and borosilicate glass. Interdiffusion in these thin bilayers have been probed by Rutherford backscattering, with collaborators at Case Western Reserve University, and grazing incidence x-ray scattering (GIXS), with collaborators at the University at Buffalo and Brookhaven National Lab. Also, in order better to understand the properties of the ternary alloy material, we used laser physical vapor deposition to prepare a series of CdS{sub x}Te{sub 1-x} films on borosilicate glass. The composition of the alloy films was determined by wavelength dispersive x-ray spectroscopy at NREL. These films are currently being investigated by us and other groups at NREL and IEC.

  9. Compositional and Structural Characterization by TEM of Lattice-Mismatched III-V Epilayers

    SciTech Connect (OSTI)

    Ahrenkiel, S. P.; Rathi, M.; Nesheim, R.; Zheng, N.; Vunnam, S.; Carapella, J. J.; Wanlass, M. W.

    2011-01-01

    We discuss compositional and structural transmission electron microscopy (TEM) characterization of lattice-mismatched (LMM) III-V epilayers grown on GaAs by metalorganic chemical vapor deposition (MOCVD), with possible applications in high-efficiency multijunction solar cells. In addition to the use of TEM imaging to survey layer thicknesses and defect morphology, our analysis emphasizes the particular methods of energy-dispersive X-ray spectrometry (EDX) and convergent-beam electron diffraction (CBED). Outlined here is a standards-based method for extracting compositions by EDX, which uses principal-component analysis (PCA) [1], combined with the zeta-factor approach of Watanabe and Williams [2]. A procedure is described that uses the coordinates of high-order Laue zone (HOLZ) lines, which are found in the bright-field disks of CBED patterns, to extract composition and strain parameters from embedded epilayers. The majority of the crystal growth for this work was performed at NREL, which has accommodated the development at SDSM&T of the characterization techniques described. However, epilayer deposition capability at SDSM&T has recently been achieved, using a home-built system, which is presently being used to examine new lattice-mismatched structures relevant to photovoltaic technology.

  10. High-throughput manufacturing of thin-film CdS/CdTe photovoltaic modules. Annual subcontract report, 16 September 1996--15 January 1998

    SciTech Connect (OSTI)

    Sandwisch, D.W. [Solar Cells, Inc., Toledo, OH (United States)

    1998-08-01

    Cadmium telluride (CdTe) is recognized as one of the leading materials for low-cost photovoltaic modules. Solar Cells, Inc., has developed this technology and is scaling its pilot production capabilities to a multi-megawatt level. The Photovoltaic Manufacturing Technology (PVMaT) subcontract supports these efforts. Activities during the third phase of the program concentrated on process development, equipment design and testing, quality assurance, ES and H programs, and large-scale next-generation coating-system prototype development. These efforts broadly addressed the issues of the manufacturing process for producing thin-film, monolithic CdS/CdTe photovoltaic modules.

  11. 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  

  12. NREL photovoltaic subcontract reports: Abstracts and document control information, 1 August 1991--31 July 1992

    SciTech Connect (OSTI)

    Not Available

    1992-08-01

    This report contains document control information and abstracts for the National Renewable Energy Laboratory (NREL) subcontracted photovoltaic program publications. It also lists source information on additional publications that describe US Department of Energy (DOE) PV research activities. It is not totally exhaustive, so it lists NREL contacts for requesting further information on the DOE and NREL PV programs. This report covers the period from August 1, 1991, through July 31, 1992. The purpose of continuing this type of publication is to help people keep abreast of specific PV interests, while maintaining a balance on the costs to the PV program. The information in this report is organized under PV technology areas: Amorphous silicon research; polycrystalline thin films (including copper indium diselenide, cadmium telluride, and thin-film silicon); crystalline materials and advanced concepts (including silicon, gallium arsenide, and other group III-V materials); and PV manufacturing technology development (which may include manufacturing information for various types of PV materials).

  13. In-Line Post-Process Scribing for Reducing Cell to Module Efficiency Gap in Monolithic Thin Film Photovoltaics

    E-Print Network [OSTI]

    Dongaonkar, Sourabh

    2013-01-01

    The gap between cell and module efficiency is a major challenge for all photovoltaic (PV) technologies. For monolithic thin film PV modules, a significant fraction of this gap has been attributed to parasitic shunts, and other defects, distributed across the module. In this paper, we show that it is possible to contain or isolate these shunt defects, using the state of the art laser scribing processes, after the fabrication of the series connected module is finished. We discuss three possible alternatives, and quantify the performance gains for each technique. We demonstrate that using these techniques, it is possible to recover up to 50% of the power lost to parasitic shunts, which results in 1-2% (absolute) increase in module efficiencies for typical thin film PV technologies.

  14. PROJECT PROFILE: 2D Materials for Low Cost Epitaxial Growth of Single Sun Gallium Arsenide (GaAs) Photovoltaics

    Office of Energy Efficiency and Renewable Energy (EERE)

    Low-cost III-V cells will result in a breakthrough in photovoltaic (PV) market by enabling lower LCOE. The project will develop low-cost substrates to template the growth of GaAs.

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

    E-Print Network [OSTI]

    Leow, Shin Woei

    2014-01-01

    using front-facing photovoltaic cell luminescent solarwith front-facing photovoltaic cells using weighted Montefor tandem photovoltaic cells,” Thin Solid Films, vol. 516,

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

    E-Print Network [OSTI]

    Mariani, Giacomo

    2013-01-01

    for efficient photovoltaic cells, Nat. Nanotechnol. 6, 568-for efficient photovoltaic cells, Nat. Nanotechnol. 6, 568-trapping in thin-film photovoltaic cells, Opt. Express 8,

  17. Rational Design and Preparation of Organic Semiconductors for use in Field Effect Transistors and Photovoltaic Cells

    E-Print Network [OSTI]

    Mauldin, Clayton Edward

    2010-01-01

    Effect Transistors and Photovoltaic Cells By Clayton EdwardEffect Transistors and Photovoltaic Cells By Clayton Edwardin thin film organic photovoltaic cells (OPVs) is presented.

  18. Rational Design and Preparation of Organic Semiconductors for use in Field Effect Transistors and Photovoltaic Cells

    E-Print Network [OSTI]

    Mauldin, Clayton Edward

    2010-01-01

    in thin film organic photovoltaic cells (OPVs) is presented.Effect Transistors and Photovoltaic Cells By Clayton EdwardEffect Transistors and Photovoltaic Cells By Clayton Edward

  19. Three approaches to economical photovoltaics: conformal Cu2S, organic luminescent films, and PbSe nanocrystal superlattices

    E-Print Network [OSTI]

    Carbone, Ian Anthony

    2013-01-01

    Degradation in CDS-Cu2S photovoltaic cells. Semiconductorcell with cuins2: A photovoltaic cell concept using an ex-and the the photovoltaic action in solar cell devices. The

  20. Comparative alternative materials assessment to screen toxicity hazards in the life cycle of CIGS thin film photovoltaics

    E-Print Network [OSTI]

    Eisenberg, DA; Yu, M; Lam, CW; Ogunseitan, OA; Schoenung, JM

    2013-01-01

    Ga)(S,Se) 2 based thin ?lm photovoltaics: present status andcycle of CIGS thin ?lm photovoltaics Daniel A. Eisenberg a ,selenium–sul?de Thin ?lm photovoltaics Life cycle thinking a

  1. 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

  2. Reconfigurable p-n junction diodes and the photovoltaic effect in exfoliated MoS{sub 2} films

    SciTech Connect (OSTI)

    Sutar, Surajit; Agnihotri, Pratik; Comfort, Everett; Ung Lee, Ji; Taniguchi, T.; Watanabe, K.

    2014-03-24

    Realizing basic semiconductor devices such as p-n junctions are necessary for developing thin-film and optoelectronic technologies in emerging planar materials such as MoS{sub 2}. In this work, electrostatic doping by buried gates is used to study the electronic and optoelectronic properties of p-n junctions in exfoliated MoS{sub 2} flakes. Creating a controllable doping gradient across the device leads to the observation of the photovoltaic effect in monolayer and bilayer MoS{sub 2} flakes. For thicker flakes, strong ambipolar conduction enables realization of fully reconfigurable p-n junction diodes with rectifying current-voltage characteristics, and diode ideality factors as low as 1.6. The spectral response of the photovoltaic effect shows signatures of the predicted band gap transitions. For the first excitonic transition, a shift of >4{sub kB}T is observed between monolayer and bulk devices, indicating a thickness-dependence of the excitonic coulomb interaction.

  3. General method for simultaneous optimization of light trapping and carrier collection in an ultra-thin film organic photovoltaic cell

    SciTech Connect (OSTI)

    Tsai, Cheng-Chia Grote, Richard R.; Beck, Jonathan H.; Kymissis, Ioannis; Osgood, Richard M.; Englund, Dirk

    2014-07-14

    We describe a general method for maximizing the short-circuit current in thin planar organic photovoltaic (OPV) heterojunction cells by simultaneous optimization of light absorption and carrier collection. Based on the experimentally obtained complex refractive indices of the OPV materials and the thickness-dependence of the internal quantum efficiency of the OPV active layer, we analyze the potential benefits of light trapping strategies for maximizing the overall power conversion efficiency of the cell. This approach provides a general strategy for optimizing the power conversion efficiency of a wide range of OPV structures. In particular, as an experimental trial system, the approach is applied here to a ultra-thin film solar cell with a SubPc/C{sub 60} photovoltaic structure. Using a patterned indium tin oxide (ITO) top contact, the numerically optimized designs achieve short-circuit currents of 0.790 and 0.980?mA/cm{sup 2} for 30?nm and 45?nm SubPc/C{sub 60} heterojunction layer thicknesses, respectively. These values correspond to a power conversion efficiency enhancement of 78% for the 30?nm thick cell, but only of 32% for a 45?nm thick cell, for which the overall photocurrent is actually higher. Applied to other material systems, the general optimization method can elucidate if light trapping strategies can improve a given cell architecture.

  4. High-throughput manufacturing of thin-film CdS/CdTe photovoltaic modules. Annual subcontract report, 16 November 1994--15 November 1995

    SciTech Connect (OSTI)

    Sandwisch, D.W. [Solar Cells, Inc., Toledo, OH (United States)

    1997-02-01

    The objectives of this subcontract are to advance Solar Cells, Inc.`s (SCI`s) photovoltaic manufacturing technologies, reduce module production costs, increase module performance, and provide the groundwork for SCI to expand its commercial production capacities. Activities during the second year of the program concentrated on process development, equipment design and testing, quality assurance, and ES and H programs. These efforts broadly addressed the issues of the manufacturing process for producing thin-film monolithic CdS/CdTe photovoltaic modules.

  5. Synthesis of III-V nitride nanowires with controlled structure, morphology, and composition

    E-Print Network [OSTI]

    Crawford, Samuel Curtis

    2014-01-01

    The III-V nitride materials system offers tunable electronic and optical properties that can be tailored for specific electronic and optoelectronic applications by varying the (In,Ga,Al)N alloy composition. While nitride ...

  6. Nano-scale metal contacts for future III-V CMOS

    E-Print Network [OSTI]

    Guo, Alex

    2012-01-01

    As modem transistors continue to scale down in size, conventional Si CMOS is reaching its physical limits and alternative technologies are needed to extend Moore's law. Among different candidates, MOSFETs with a III-V ...

  7. Platform for monolithic integration of III-V devices with Si CMOS technology

    E-Print Network [OSTI]

    Pacella, Nan Yang

    2012-01-01

    Monolithic integration of III-V compound semiconductors and Si complementary metal-oxide- semiconductor (CMOS) enables the creation of advanced circuits with new functionalities. In order to merge the two technologies, ...

  8. Nanoscale quantification of stress and strain in III-V semiconducting nanostructures

    E-Print Network [OSTI]

    Jones, Eric James, Ph. D. Massachusetts Institute of Technology

    2015-01-01

    III-V semiconducting nanostructures present a promising platform for the realization of advanced optoelectronic devices due to their superior intrinsic materials properties including direct band gap energies that span the ...

  9. Modeling, Design, and Analysis of III-V Nanowire Transistors and Tunneling Transistors

    E-Print Network [OSTI]

    Khayer, Mohammad Abul

    2011-01-01

    semiconductor nanowires (NWs), car- bon nanotubes (CNTs), and single-atomic layers of carbon called graphene.semiconductor NWs (based on both III-V and Si), carbon nanotubes and single layer of carbon called graphene [

  10. A ballistic transport model for HEMTs and III-V MOSFETs

    E-Print Network [OSTI]

    Warnock, Shireen M

    2013-01-01

    As silicon MOSFETs keep scaling down in size, the continued improvement on their logic performance is threated by their fundamental physical limits. With silicon approaching these limits, MOSFETs designed with III-V ...

  11. Quantification of trap densities at dielectric/III–V semiconductor interfaces

    E-Print Network [OSTI]

    Stemmer, Susanne

    2010-01-01

    III–V semiconductor interfaces Roman Engel-Herbert, a?model is used to determine interface trap densities ?D it ?2 / In 0.53 Ga 0.47 As interfaces with different D it and

  12. This thesis focuses on the theoretical work done to determine thermodynamic properties of a chalcopyrite thin-film material for use as a photovoltaic material in a tandem device. The material of main focus here

    E-Print Network [OSTI]

    This thesis focuses on the theoretical work done to determine thermodynamic properties of a chalcopyrite thin-film material for use as a photovoltaic material in a tandem device. The material of main photovoltaic properties, and good lattice matching with ZnSnP2, the other component in this tandem device

  13. Conductive polymer/fullerene blend thin films with honeycomb framework for transparent photovoltaic application

    DOE Patents [OSTI]

    Cotlet, Mircea; Wang, Hsing-Lin; Tsai, Hsinhan; Xu, Zhihua

    2015-04-21

    Optoelectronic devices and thin-film semiconductor compositions and methods for making same are disclosed. The methods provide for the synthesis of the disclosed composition. The thin-film semiconductor compositions disclosed herein have a unique configuration that exhibits efficient photo-induced charge transfer and high transparency to visible light.

  14. High mobility single-crystalline-like GaAs thin films on inexpensive flexible metal substrates by metal-organic chemical vapor deposition

    SciTech Connect (OSTI)

    Dutta, P. Rathi, M.; Gao, Y.; Yao, Y.; Selvamanickam, V.; Zheng, N.; Ahrenkiel, P.; Martinez, J.

    2014-09-01

    We demonstrate heteroepitaxial growth of single-crystalline-like n and p-type doped GaAs thin films on inexpensive, flexible, and light-weight metal foils by metal-organic chemical vapor deposition. Single-crystalline-like Ge thin film on biaxially textured templates made by ion beam assisted deposition on metal foil served as the epitaxy enabling substrate for GaAs growth. The GaAs films exhibited strong (004) preferred orientation, sharp in-plane texture, low grain misorientation, strong photoluminescence, and a defect density of ?10{sup 7?}cm{sup ?2}. Furthermore, the GaAs films exhibited hole and electron mobilities as high as 66 and 300?cm{sup 2}/V-s, respectively. High mobility single-crystalline-like GaAs thin films on inexpensive metal substrates can pave the path for roll-to-roll manufacturing of flexible III-V solar cells for the mainstream photovoltaics market.

  15. 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) ...

  16. 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

  17. Final Technical Progress Report: High-Efficiency Low-Cost Thin-Film GaAs Photovoltaic Module Development Program; July 14, 2010 - January 13, 2012

    SciTech Connect (OSTI)

    Mattos, L.

    2012-03-01

    This is the final technical progress report of the High-Efficiency Low-Cost Thin-Film GaAs Photovoltaic Module Development Program. Alta Devices has successfully completed all milestones and deliverables established as part of the NREL PV incubator program. During the 18 months of this program, Alta has proven all key processes required to commercialize its solar module product. The incubator focus was on back end process steps directed at conversion of Alta's high quality solar film into high efficiency 1-sun PV modules. This report describes all program deliverables and the work behind each accomplishment.

  18. 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

  19. ULTRA BARRIER TOPSHEET (UBT) FOR FLEXIBLE PHOTOVOLTAICS

    SciTech Connect (OSTI)

    DeScioli, Derek

    2013-06-01

    This slide-show presents 3M photovoltaic-related products, particularly flexible components. Emphasis is on the 3M Ultra Barrier Solar Films. Topics covered include reliability and qualification testing and flexible photovoltaic encapsulation costs.

  20. Comparative alternative materials assessment to screen toxicity hazards in the life cycle of CIGS thin film photovoltaics

    E-Print Network [OSTI]

    Eisenberg, DA; Yu, M; Lam, CW; Ogunseitan, OA; Schoenung, JM

    2013-01-01

    market supply for consumer solar panels. Although CIGS isadvocate photovoltaic (solar) panels as a sustainablesolar cells (found within solar panels) of greater than 19%

  1. Ultra Barrier Topsheet Film for Flexible Photovoltaics with 3M Company

    SciTech Connect (OSTI)

    Funkenbusch, Arnie; Ruth, Charles

    2014-12-30

    In this DOE sponsored program, 3M achieved the critical UBT features to enable durable flexible high efficiency modules to be produced by a range of customers who have now certified the 3M UBT and are actively developing said flexible modules. The specific objectives and accomplishments of the work under this program were; Scale-up the current Generation-1 UBT from 12” width, as made on 3M’s pilot line, to 1+meter width full-scale manufacturing, while maintaining baseline performance metrics (see table below); This objective was fully met; Validate service life of Generation-1 UBT for the 25+ year lifetime demanded by the photovoltaic market; Aggressive testing revealed potential failure modes in the Gen 1 UBT. Deficiencies were identified and corrective action taken in the Gen 2 UBT; Develop a Generation-2 UBT on the pilot line, targeting improved performance relative to baseline, including higher %T (percent transmission), lower water vapor transmission rate (WVTR) with targets based on what the technology needs for 25 year lifetime, proven lifetime of 25 years in solar module construction in the field, and lower cost; Testing of UBT Gen 2 under a wide range of conditions presented in this report failed to reveal any failure mode. Therefore UBT Gen 2 is known to be highly durable. 3M will continue to test towards statistically validating a 25 year lifetime under 3M funding; Transfer Generation-2 UBT from the pilot line to the full-scale manufacturing line within three years; and This objective was fully met.

  2. 282 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 5, NO. 1, JANUARY 2015 Photovoltaic Material Characterization With Steady

    E-Print Network [OSTI]

    Javey, Ali

    282 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 5, NO. 1, JANUARY 2015 Photovoltaic Material an approach to characterize the surface and bulk properties for thin films of photovoltaic mate- rials- toluminescence (PL), photovoltaic cells. I. INTRODUCTION VARIOUS characterization techniques based on photolu

  3. Multijunction Photovoltaic Technologies for High-Performance Concentrators: Preprint

    SciTech Connect (OSTI)

    McConnell, R.; Symko-Davies, M.

    2006-05-01

    Multijunction solar cells provide high-performance technology pathways leading to potentially low-cost electricity generated from concentrated sunlight. The National Center for Photovoltaics at the National Renewable Energy Laboratory has funded different III-V multijunction solar cell technologies and various solar concentration approaches. Within this group of projects, III-V solar cell efficiencies of 41% are close at hand and will likely be reported in these conference proceedings. Companies with well-developed solar concentrator structures foresee installed system costs of $3/watt--half of today's costs--within the next 2 to 5 years as these high-efficiency photovoltaic technologies are incorporated into their concentrator photovoltaic systems. These technology improvements are timely as new large-scale multi-megawatt markets, appropriate for high performance PV concentrators, open around the world.

  4. Multijunction Photovoltaic Technologies for High-Performance Concentrators

    SciTech Connect (OSTI)

    McConnell, R.; Symko-Davies, M.

    2006-01-01

    Multijunction solar cells provide high-performance technology pathways leading to potentially low-cost electricity generated from concentrated sunlight. The National Center for Photovoltaics at the National Renewable Energy Laboratory has funded different III-V multijunction solar cell technologies and various solar concentration approaches. Within this group of projects, III-V solar cell efficiencies of 41% are close at hand and will likely be reported in these conference proceedings. Companies with well-developed solar concentrator structures foresee installed system costs of $3/watt--half of today's costs--within the next 2 to 5 years as these high-efficiency photovoltaic technologies are incorporated into their concentrator photovoltaic systems. These technology improvements are timely as new large-scale multi-megawatt markets, appropriate for high performance PV concentrators, open around the world.

  5. Aerosol Spray Pyrolysis Synthesis of CZTS Nanostructures for Photovoltaic Applications

    E-Print Network [OSTI]

    Exarhos, Stephen

    2015-01-01

    Thin Films. ” Energy & Environmental Science 7, no. 6 (MayThin Films. ” Energy & Environmental Science 7, no. 6 (MayPhotovoltaics. ” Energy & Environmental Science 6, no. 11 (

  6. New III-V cell design approaches for very high efficiency. Annual subcontract report, 1 August 1991--31 July 1992

    SciTech Connect (OSTI)

    Lundstrom, M.S.; Melloch, M.R.; Lush, G.B.; Patkar, M.P.; Young, M.P. [Purdue Univ., Lafayette, IN (United States)

    1993-04-01

    This report describes to examine new solar cell desip approaches for achieving very high conversion efficiencies. The program consists of two elements. The first centers on exploring new thin-film approaches specifically designed for M-III semiconductors. Substantial efficiency gains may be possible by employing light trapping techniques to confine the incident photons, as well as the photons emitted by radiative recombination. The thin-film approach is a promising route for achieving substantial performance improvements in the already high-efficiency, single-junction, III-V cell. The second element of the research involves exploring desip approaches for achieving high conversion efficiencies without requiring extremely high-quality material. This work has applications to multiple-junction cells, for which the selection of a component cell often involves a compromise between optimum band pp and optimum material quality. It could also be a benefit manufacturing environment by making the cell`s efficiency less dependent on materialquality.

  7. Broadband and omnidirectional anti-reflection layer for III/V multi-junction solar cells

    E-Print Network [OSTI]

    Diedenhofen, Silke L; Haverkamp, Erik; Bauhuis, Gerard; Schermer, John; Rivas, Jaime Gómez; 10.1016/j.solmat.2012.02.022

    2012-01-01

    We report a novel graded refractive index antireflection coating for III/V quadruple solar cells based on bottom-up grown tapered GaP nanowires. We have calculated the photocurrent density of an InGaP-GaAs-InGaAsP-InGaAs solar cell with a MgF2/ZnS double layer antireflection coating and with a graded refractive index coating. The photocurrent density can be increased by 5.9 % when the solar cell is coated with a graded refractive index layer with a thickness of 1\\mu m. We propose to realize such a graded refractive index layer by growing tapered GaP nanowires on III/V solar cells. For a first demonstration of the feasibility of the growth of tapered nanowires on III/V solar cells, we have grown tapered GaP nanowires on AlInP/GaAs substrates. We show experimentally that the reflection from the nanowire coated substrate is reduced and that the transmission into the substrate is increased for a broad spectral and angular range.

  8. Novel Approaches to High-Efficiency III-V Nitride Heterostructure Emitters for Next-Generation Lighting Applications

    SciTech Connect (OSTI)

    Russell D. Dupuis

    2004-09-30

    We report research activities and technical progress on the development of high-efficiency long wavelength ({lambda} {approx} 540nm) green light emitting diodes which covers the first year of the three-year program ''Novel approaches to high-efficiency III-V nitride heterostructure emitters for next-generation lighting applications''. The first year activities were focused on the installation, set-up, and use of advanced equipment for the metalorganic chemical vapor deposition growth of III-nitride films and the characterization of these materials (Task 1) and the design, fabrication, testing of nitride LEDs (Task 4). As a progress highlight, we obtained improved quality of {approx} 2 {micro}m-thick GaN layers (as measured by the full width at half maximum of the asymmetric (102) X-ray diffraction peak of less than 350 arc-s) and higher p-GaN:Mg doping level (free hole carrier higher than 1E18 cm{sup -3}). Also in this year, we have developed the growth of InGaN/GaN active layers for long-wavelength green light emitting diodes, specifically, for emission at {lambda} {approx} 540nm. The effect of the Column III precursor (for Ga) and the post-growth thermal annealing effect were also studied. Our LED device fabrication process was developed and initially optimized, especially for low-resistance ohmic contacts for p-GaN:Mg layers, and blue-green light emitting diode structures were processed and characterized.

  9. Understanding how processing additives tune nanoscale morphology of high efficiency organic photovoltaic blends: From casting solution to spun-cast thin film

    SciTech Connect (OSTI)

    Shao, Ming [ORNL; Keum, Jong Kahk [ORNL; Kumar, Rajeev [ORNL; Chen, Jihua [ORNL; Browning, Jim [ORNL; Chen, Wei [Argonne National Laboratory (ANL); Jianhui, Hou [Chinese Academy of Sciences (CAS), Institute of Chemistry; Do, Changwoo [ORNL; Littrell, Ken [ORNL; Sanjib, Das [University of Tennessee, Knoxville (UTK); Rondinone, Adam Justin [ORNL; Geohegan, David B [ORNL; Sumpter, Bobby G [ORNL; Xiao, Kai [ORNL

    2014-01-01

    Adding a small amount of a processing additive to the casting solution of organic blends has been demonstrated to be an effective method for achieving improved power conversion efficiency (PCE) in organic photovoltaics (OPVs). However, an understanding of the nano-structural evolution occurring in the transformation from casting solution to thin photoactive films is still lacking. In this report, we investigate the effects of the processing additive diiodooctane (DIO) on the morphology of OPV blend of PBDTTT-C-T and fullerene derivative, PC71BM in a casting solution and in spun-cast thin films by using neutron/x-ray scattering, neutron reflectometry and other characterization techniques. The results reveal that DIO has no effect on the solution structures of PBDTTT-C-T and PC71BM. In the spun-cast films, however, DIO is found to promote significantly the molecular ordering of PBDTTT-C-T and PC71BM, and phase segregation, resulting in the improved PCE. Thermodynamic analysis based on Flory-Huggins theory provides a rationale for the effects of DIO on different characteristics of phase segregation as a solvent and due to evaporationg during the film formation. Such information may enable improved rational design of ternary blends to more consistently achieve improved PCE for OPVs.

  10. Photovoltaic properties of Aurivillius phase Bi{sub 5}FeTi{sub 3}O{sub 15} thin films grown by pulsed laser deposition

    SciTech Connect (OSTI)

    Kooriyattil, Sudheendran; Katiyar, Rajesh K.; Pavunny, Shojan P. E-mail: shojanpp@gmail.com; Morell, Gerardo; Katiyar, Ram S. E-mail: shojanpp@gmail.com

    2014-08-18

    We report a remarkable photovoltaic effect in pulsed laser deposited multiferroic aurivillius phase Bi{sub 5}FeTi{sub 3}O{sub 15} (BFTO) thin films sandwiched between ZnO:Al transparent conductive oxide top electrode and SrRuO{sub 3} bottom electrode fabricated on amorphous fused silica substrates. The structural and micro structural properties of these films were analysed by X-ray diffraction and atomic force microscopy techniques. The films were showing a photo sensitive ferroelectric behaviour with a notable apparent polarization in the range of 10–15??C/cm{sup 2}. These films also exhibited a switchable photo-response and this parameter was observed to be sensitive to polarisation field and the polarization direction. The device shows a large ON/OFF photo current ratio with an open circuit voltage of 0.14?V. The photo response at zero bias of this BFTO based heterostructures showed rapid increase to a saturation value of 6??A at zero bias.

  11. High-Temperature Thermoelectric Characterization of III–V Semiconductor Thin Films by Oxide Bonding

    E-Print Network [OSTI]

    2010-01-01

    High-Temperature Thermoelectric Characterization of III–Vfor high-temperature thermoelectric charac- terization ofdiffusion barrier. A thermoelectric material, thin-?lm ErAs:

  12. III-V single photon avalanche detector with built-in negative feedback for NIR photon detection

    E-Print Network [OSTI]

    Zhao, Kai

    2008-01-01

    semiconductor based SPADs due to the material properties andmaterial properties and the fabrication process compatibility, it still remains challenging to implement ANF concept to III-V compound semiconductor

  13. Thin film photovoltaic cells

    DOE Patents [OSTI]

    Rothwarf, Allen (Philadelphia, PA)

    1981-01-01

    A solar cell has as its transparent electrical contact a grid made from a non-noble metal by providing a layer of copper oxide between the transparent electrical contact and the absorber-generator.

  14. Iron Chalcogenide Photovoltaic Absorbers

    SciTech Connect (OSTI)

    Yu, Liping; Lany, Stephan; Kykyneshi, Robert; Jieratum, Vorranutch; Ravichandran, Ram; Pelatt, Brian; Altschul, Emmeline; Platt, Heather A. S.; Wager, John F.; Keszler, Douglas A.; Zunger, Alex

    2011-08-10

    An integrated computational and experimental study of FeS? pyrite reveals that phase coexistence is an important factor limiting performance as a thin-film solar absorber. This phase coexistence is suppressed with the ternary materials Fe?SiS? and Fe?GeS?, which also exhibit higher band gaps than FeS?. Thus, the ternaries provide a new entry point for development of thin-film absorbers and high-efficiency photovoltaics.

  15. Performance and Reliability of Multijunction III-V Modules for Concentrator Dish and Central Receiver Applications

    SciTech Connect (OSTI)

    Verlinden, P. J.; Lewandowski, A.; Bingham, C.; Kinsey, G. S.; Sherif, R. A.; Laisch, J. B.

    2006-01-01

    Over the last 15 years, Solar Systems have developed a dense array receiver PV technology for 500X concentrator reflective dish applications. This concentrator PV technology has been successfully deployed at six different locations in Australia, counting for more than 1 MWp of installed peak power. A new Multijunction III-V receiver to replace the current silicon Point-Contact solar cells has recently been developed. The new receiver technology is based on high-efficiency (>32%) Concentrator Ultra Triple Junction (CUTJ) solar cells from Spectrolab, resulting in system power and energy performance improvement of more than 50% compared to the silicon cells. The 0.235 m{sup 2} concentrator PV receiver, designed for continuous 500X operation, is composed of 64 dense array modules, and made of series and parallel-connected solar cells, totaling approximately 1,500 cells. The individual dense array modules have been tested under high intensity pulsed light, as well as with concentrated sunlight at the Solar Systems research facility and at the National Renewable Energy Laboratory's High Flux Solar Furnace. The efficiency of the dense array modules ranges from 30% to 36% at 500X (50 W/cm{sup 2}, AM1.5D low AOD, 21C). The temperature coefficients for power, voltage and current, as well as the influence of Air Mass on the cell responsivity, were measured. The reliability of the dense array multijunction III-V modules has been studied with accelerated aging tests, such as thermal cycling, damp heat and high-temperature soak, and with real-life high-intensity exposure. The first 33 kWp multijunction III-V receiver was recently installed in a Solar Systems dish and tested in real-life 500X concentrated sunlight conditions. Receiver efficiencies of 30.3% and 29.0% were measured at Standard Operating Conditions and Normal Operating Conditions respectively.

  16. Photovoltaic Materials

    SciTech Connect (OSTI)

    Duty, C.; Angelini, J.; Armstrong, B.; Bennett, C.; Evans, B.; Jellison, G. E.; Joshi, P.; List, F.; Paranthaman, P.; Parish, C.; Wereszczak, A.

    2012-10-15

    The goal of the current project was to help make the US solar industry a world leader in the manufacture of thin film photovoltaics. The overall approach was to leverage ORNL’s unique characterization and processing technologies to gain a better understanding of the fundamental challenges for solar cell processing and apply that knowledge to targeted projects with industry members. ORNL has the capabilities in place and the expertise required to understand how basic material properties including defects, impurities, and grain boundaries affect the solar cell performance. ORNL also has unique processing capabilities to optimize the manufacturing process for fabrication of high efficiency and low cost solar cells. ORNL recently established the Center for Advanced Thin-film Systems (CATS), which contains a suite of optical and electrical characterization equipment specifically focused on solar cell research. Under this project, ORNL made these facilities available to industrial partners who were interested in pursuing collaborative research toward the improvement of their product or manufacturing process. Four specific projects were pursued with industrial partners: Global Solar Energy is a solar industry leader in full scale production manufacturing highly-efficient Copper Indium Gallium diSelenide (CIGS) thin film solar material, cells and products. ORNL worked with GSE to develop a scalable, non-vacuum, solution technique to deposit amorphous or nanocrystalline conducting barrier layers on untextured stainless steel substrates for fabricating high efficiency flexible CIGS PV. Ferro Corporation’s Electronic, Color and Glass Materials (“ECGM”) business unit is currently the world’s largest supplier of metallic contact materials in the crystalline solar cell marketplace. Ferro’s ECGM business unit has been the world's leading supplier of thick film metal pastes to the crystalline silicon PV industry for more than 30 years, and has had operational cells and modules in the field for 25 years. Under this project, Ferro leveraged world leading analytical capabilities at ORNL to characterize the paste-to-silicon interface microstructure and develop high efficiency next generation contact pastes. Ampulse Corporation is developing a revolutionary crystalline-silicon (c-Si) thin-film solar photovoltaic (PV) technology. Utilizing uniquely-textured substrates and buffer materials from the Oak Ridge National Laboratory (ORNL), and breakthroughs in Hot-Wire Chemical Vapor Deposition (HW-CVD) techniques in epitaxial silicon developed at the National Renewable Energy Laboratory (NREL), Ampulse is creating a solar technology that is tunable in silicon thickness, and hence in efficiency and economics, to meet the specific requirements of multiple solar PV applications. This project focused on the development of a high rate deposition process to deposit Si, Ge, and Si1-xGex films as an alternate to hot-wire CVD. Mossey Creek Solar is a start-up company with great expertise in the solar field. The primary interest is to create and preserve jobs in the solar sector by developing high-yield, low-cost, high-efficiency solar cells using MSC-patented and -proprietary technologies. The specific goal of this project was to produce large grain formation in thin, net-shape-thickness mc-Si wafers processed with high-purity silicon powder and ORNL's plasma arc lamp melting without introducing impurities that compromise absorption coefficient and carrier lifetime. As part of this project, ORNL also added specific pieces of equipment to enhance our ability to provide unique insight for the solar industry. These capabilities include a moisture barrier measurement system, a combined physical vapor deposition and sputtering system dedicated to cadmium-containing deposits, adeep level transient spectroscopy system useful for identifying defects, an integrating sphere photoluminescence system, and a high-speed ink jet printing system. These tools were combined with others to study the effect of defects on the performance of crystalline silicon and

  17. Three approaches to economical photovoltaics: conformal Cu2S, organic luminescent films, and PbSe nanocrystal superlattices

    E-Print Network [OSTI]

    Carbone, Ian Anthony

    2013-01-01

    thin films by atomic layer deposition. Journal of Materialsand J. Schoonman. Atomic layer deposition of CuxS for solarfilms grown by atomic layer deposition and chemical vapor

  18. Evaluation of the commercial potential of novel organic photovoltaic technologies

    E-Print Network [OSTI]

    Barr, Jonathan (Jonathan Allan)

    2005-01-01

    Photovoltaic cells based on organic semiconducting materials have the potential to compete with the more mature crystalline and thin film based photovoltaic technologies in the future primarily due to the expectation of ...

  19. Recent progress in III-V based ferromagnetic semiconductors: Band structure, Fermi level, and tunneling transport

    SciTech Connect (OSTI)

    Tanaka, Masaaki; Ohya, Shinobu Nam Hai, Pham

    2014-03-15

    Spin-based electronics or spintronics is an emerging field, in which we try to utilize spin degrees of freedom as well as charge transport in materials and devices. While metal-based spin-devices, such as magnetic-field sensors and magnetoresistive random access memory using giant magnetoresistance and tunneling magnetoresistance, are already put to practical use, semiconductor-based spintronics has greater potential for expansion because of good compatibility with existing semiconductor technology. Many semiconductor-based spintronics devices with useful functionalities have been proposed and explored so far. To realize those devices and functionalities, we definitely need appropriate materials which have both the properties of semiconductors and ferromagnets. Ferromagnetic semiconductors (FMSs), which are alloy semiconductors containing magnetic atoms such as Mn and Fe, are one of the most promising classes of materials for this purpose and thus have been intensively studied for the past two decades. Here, we review the recent progress in the studies of the most prototypical III-V based FMS, p-type (GaMn)As and its heterostructures with focus on tunneling transport, Fermi level, and bandstructure. Furthermore, we cover the properties of a new n-type FMS, (In,Fe)As, which shows electron-induced ferromagnetism. These FMS materials having zinc-blende crystal structure show excellent compatibility with well-developed III-V heterostructures and devices.

  20. Photovoltaic cells employing zinc phosphide

    DOE Patents [OSTI]

    Barnett, Allen M. (Newark, DE); Catalano, Anthony W. (Wilmington, DE); Dalal, Vikram L. (Newark, DE); Masi, James V. (Wilbraham, MA); Meakin, John D. (Newark, DE); Hall, Robert B. (Newark, DE)

    1984-01-01

    A photovoltaic cell having a zinc phosphide absorber. The zinc phosphide can be a single or multiple crystal slice or a thin polycrystalline film. The cell can be a Schottky barrier, heterojunction or homojunction device. Methods for synthesizing and crystallizing zinc phosphide are disclosed as well as a method for forming thin films.

  1. Synthesizing photovoltaic thin films of high quality copper-zinc-tin alloy with at least one chalcogen species

    DOE Patents [OSTI]

    Teeter, Glenn; Du, Hui; Young, Matthew

    2013-08-06

    A method for synthesizing a thin film of copper, zinc, tin, and a chalcogen species ("CZTCh" or "CZTSS") with well-controlled properties. The method includes depositing a thin film of precursor materials, e.g., approximately stoichiometric amounts of copper (Cu), zinc (Zn), tin (Sn), and a chalcogen species (Ch). The method then involves re-crystallizing and grain growth at higher temperatures, e.g., between about 725 and 925 degrees K, and annealing the precursor film at relatively lower temperatures, e.g., between 600 and 650 degrees K. The processing of the precursor film takes place in the presence of a quasi-equilibrium vapor, e.g., Sn and chalcogen species. The quasi-equilibrium vapor is used to maintain the precursor film in a quasi-equilibrium condition to reduce and even prevent decomposition of the CZTCh and is provided at a rate to balance desorption fluxes of Sn and chalcogens.

  2. 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.

  3. Three approaches to economical photovoltaics: conformal Cu2S, organic luminescent films, and PbSe nanocrystal superlattices

    E-Print Network [OSTI]

    Carbone, Ian Anthony

    2013-01-01

    carlo modelling of organic solar cells: the dependence ofin nanostructured organic solar cells. ACS Nano, 2(5):1022–The organic luminescent film is placed above the solar cell

  4. Photovoltaic Subcontract Program

    SciTech Connect (OSTI)

    Surek, Thomas; Catalano, Anthony

    1993-03-01

    This report summarizes the fiscal year (FY) 1992 progress of the subcontracted photovoltaic (PV) research and development (R D) performed under the Photovoltaic Advanced Research and Development Project at the National Renewable Energy Laboratory (NREL)-formerly the Solar Energy Research Institute (SERI). The mission of the national PV program is to develop PV technology for large-scale generation of economically competitive electric power in the United States. The technical sections of the report cover the main areas of the subcontract program: the Crystalline Materials and Advanced Concepts project, the Polycrystalline Thin Films project, Amorphous Silicon Research project, the Photovoltaic Manufacturing Technology (PVMaT) project, PV Module and System Performance and Engineering project, and the PV Analysis and Applications Development project. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1992, and future research directions.

  5. Dilute Group III-V nitride intermediate band solar cells with contact blocking layers

    DOE Patents [OSTI]

    Walukiewicz, Wladyslaw (Kensington, CA); Yu, Kin Man (Lafayette, CA)

    2012-07-31

    An intermediate band solar cell (IBSC) is provided including a p-n junction based on dilute III-V nitride materials and a pair of contact blocking layers positioned on opposite surfaces of the p-n junction for electrically isolating the intermediate band of the p-n junction by blocking the charge transport in the intermediate band without affecting the electron and hole collection efficiency of the p-n junction, thereby increasing open circuit voltage (V.sub.OC) of the IBSC and increasing the photocurrent by utilizing the intermediate band to absorb photons with energy below the band gap of the absorber layers of the IBSC. Hence, the overall power conversion efficiency of a IBSC will be much higher than an conventional single junction solar cell. The p-n junction absorber layers of the IBSC may further have compositionally graded nitrogen concentrations to provide an electric field for more efficient charge collection.

  6. Dilute group III-V nitride intermediate band solar cells with contact blocking layers

    DOE Patents [OSTI]

    Walukiewicz, Wladyslaw; Yu, Kin Man

    2015-02-24

    An intermediate band solar cell (IBSC) is provided including a p-n junction based on dilute III-V nitride materials and a pair of contact blocking layers positioned on opposite surfaces of the p-n junction for electrically isolating the intermediate band of the p-n junction by blocking the charge transport in the intermediate band without affecting the electron and hole collection efficiency of the p-n junction, thereby increasing open circuit voltage (V.sub.OC) of the IBSC and increasing the photocurrent by utilizing the intermediate band to absorb photons with energy below the band gap of the absorber layers of the IBSC. Hence, the overall power conversion efficiency of a IBSC will be much higher than an conventional single junction solar cell. The p-n junction absorber layers of the IBSC may further have compositionally graded nitrogen concentrations to provide an electric field for more efficient charge collection.

  7. Energy-tunable entangled photon sources on a III-V/Silicon chip

    E-Print Network [OSTI]

    Chen, Yan; Zopf, Michael; Jung, Kyubong; Zhang, Yang; Ding, Fei; Schmidt, Oliver G

    2015-01-01

    Many of the envisioned quantum photonic technologies, e.g. a quantum repeater, rely on an energy- (wavelength-) tunable source of polarization entangled photon pairs. The energy tunability is a fundamental requirement to perform two-photon-interference between different sources and to swap the entanglement. Parametric-down-conversion and four-wave-mixing sources of entangled photons have shown energy tunability, however the probabilistic nature of the sources limits their applications in complex quantum protocols. Here we report a silicon-based hybrid photonic chip where energy-tunable polarization entangled photons are generated by deterministic and scalable III-V quantum light sources. This device is based on a micro-electromechanical system (MEMS) incorporating InAs/GaAs quantum dots (QDs) on a PMNPT-on-silicon substrate. The entangled photon emissions from single QDs can be tuned by more than 3000 times of the radiative linewidth without spoiling the entanglement. With a footprint of several hundred micro...

  8. Thin films of InP for photovoltaic energy conversion. Final report, July 5, 1979-July 4, 1980

    SciTech Connect (OSTI)

    Manasevit, H.M.; Ruth, R.P.; Moudy, L.A.; Yang, J.J.J.; Johnson, R.E.

    1980-08-01

    Research to develop a low-cost high-efficiency thin-film InP heterojunction solar cell, using the metalorganic chemical vapor deposition (MO-CVD) technique for InP film growth on suitable substrates is reported. Heterostructure devices of CdS/InP, using InP films prepared by CO-CVD, were prepared and characterized. The research effort involved three major technical tasks: (1) materials growth; (2) materials characterization; and (3) device fabrication and characterization. The principal results achieved in the investigations are as follows: (1) temperature-activated orientation-dependent background donor doping was observed in undoped epitaxial InP films; (2) p-type epitaxial InP films were prepared by Zn and by Cd doping during growth; (3) the efficacy of Cd doping was found to vary exponentially with the reciprocal of the deposition temperature in the range 650 to 730/sup 0/C; (4) Cd doping appeared to offer no clear advantages over Zn doping for preparation of p-type InP by the MO-CVD process; (5) GaP grown by MO-CVD was investigated as a possible intermediate-layer material for growth of InP films on low-cost substrates; (6) p/sup +/GaAs polycrystalline layers (p > /sup 19/ cm/sup -3/) were successfully prepared by Zn doping during MO-CVD growth on various low-cost substrates and used as surfaces for growth of p-type polycrystalline InP:Zn layers; (7) nCdS/pInP heterojunction solar cells were prepared by vacuum deposition of CdS onto p-type InP films grown by MO-CVD as well as on InP single-crystal wafers; (8) the best polycrystalline CdS/InP cells were obtained in structures on P/sup +/GaAs:Zn layers on both Mo sheet and Corning Code 0317 Glass; and (9) structure analyses of the Cds films used in the heterojunction cells indicated the presence of polycrystalline hexagonal CdS even in films grown on single-crystal InP films or bulk-wafer substrates. (WHK)

  9. High Performance Photovoltaic Project Overview

    SciTech Connect (OSTI)

    Symko-Davies, M.; McConnell, R.

    2005-01-01

    The High-Performance Photovoltaic (HiPerf PV) Project was initiated by the U.S. Department of Energy to substantially increase the viability of photovoltaics (PV) for cost-competitive applications so that PV can contribute significantly to our energy supply and environment in the 21st century. To accomplish this, the National Center for Photovoltaics (NCPV) directs in-house and subcontracted research in high-performance polycrystalline thin-film and multijunction concentrator devices. In this paper, we describe the recent research accomplishments in the in-house directed efforts and the research efforts under way in the subcontracted area.

  10. Sustainable Retrofit of Residential Roofs Using Metal Roofing Panels, Thin-Film Photovoltaic Laminates, and PCM Heat Sink Technology

    SciTech Connect (OSTI)

    Kosny, Jan; Miller, William A; Childs, Phillip W; Biswas, Kaushik

    2011-01-01

    During September-October 2009, research teams representing Metal Construction Association (the largest North American trade association representing metal building manufacturers, builders, and material suppliers), CertainTeed (one of the largest U.S. manufacturers of thermal insulation and building envelope materials), Unisolar (largest U.S. producer of amorphous silicone photo-voltaic (PV) laminates), Phase Change Energy (manufacturer of bio-based PCM), and Oak Ridge National Laboratory (ORNL) installed three experimental attics utilizing different roof retrofit strategies in the ORNL campus. The main goal of this project was experimental evaluation of a newly-developed sustainable re-roofing technology utilizing amorphous silicone PV laminates integrated with metal roof and PCM heat sink. The experimental attic with PV laminate was expected to work during the winter time as a passive solar collector with PCM storing solar heat, absorbed during the day, and increasing overall attic air temperature during the night.

  11. Residential photovoltaics

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The photovoltaics overview section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  12. CuInSe/sub 2/-based photoelectrochemical cells: their use in characterization of thin CuInSe/sub 2/ films, and as photovoltaic cells per se

    SciTech Connect (OSTI)

    Cahen, D.; Chen, Y.W.; Ireland, P.J.; Noufi, R.; Turner, J.A.; Rincon, C.; Bachmann, K.J.

    1984-05-01

    Photoelectrochemistry has been employed to characterize the p-CuInSe/sub 2/ component of the CdS/CuInSe/sub 2/ on-metal and a nonaqueous electrolyte containing a redox couple not specifically adsorbed onto the semiconductor, we can test the films for photovoltaic activity and obtain effective electronic properties of them, before CdS deposition, in a nondestructive manner. Electrochemical decomposition of CuInSe/sub 2/ was investigated in acetonitrile solutions to determine the mechanism of decomposition (n and p) in the dark and under illumination. Electrochemical, solution chemical and surface analyses confirmed at the light-assisted decomposition of CuInSe/sub 2/ resulted in metal ions and elemental chalcogen. On the basis of the results from the electrochemical decomposition, and studies on the solid state chemistry of the (Cu/sub 2/Se)/sub x/(In/sub 2/Se/sub 3/)/sub 1-x/ system and surface analyses, the CuInSe/sub 2//polyiodide interface was stabilized and up to 11.7% conversion efficiencies were obtained.

  13. Abstract A comprehensive overview of density functional theory simulations of high-k oxide/III-V semiconductor interfaces is presented. The methodologies of

    E-Print Network [OSTI]

    Kummel, Andrew C.

    /III-V semiconductor interfaces is presented. The methodologies of realistic amorphous high-k oxide generation.), Fundamentals of III-V Semiconductor MOSFETs, DOI 10.1007/978-1-4419-1547-4_5, © Springer Science+Business Media is the electrical permittivity of vacuum. As follows from Eq. (5.1), using a material with high dielectric constant

  14. Self-Aligned, Extremely High Frequency III-V Metal-Oxide-Semiconductor Field-Effect Transistors on Rigid and Flexible

    E-Print Network [OSTI]

    Javey, Ali

    Self-Aligned, Extremely High Frequency III-V Metal-Oxide- Semiconductor Field-Effect Transistors. The results demonstrate the potential of III-V-on-insulator platform for extremely high-frequency (EHF mobility transistors (HEMTs).15-20 The record-high cutoff frequency (ft) for InAs-based HEMTs has already

  15. Photovoltaic cells made from conjugated polymers infiltrated into mesoporous titania

    E-Print Network [OSTI]

    McGehee, Michael

    Photovoltaic cells made from conjugated polymers infiltrated into mesoporous titania Kevin M photovoltaic cells by infiltrating the conjugated polymer regioregular poly 3-hexylthiophene into films for electrons to travel to an electrode after electron transfer has occurred. The photovoltaic cells have

  16. Graduate Research Opportunities in New Materials for Photovoltaics

    E-Print Network [OSTI]

    Graduate Research Opportunities in New Materials for Photovoltaics Summary: We have new interested in the development of new materials for photovoltaics (PV). It is expected that this work-throughput combinatorial methods to develop new thin film photovoltaic absorbers. Specific responsibilities include

  17. Bulk crystal growth of antimonide based III-V compounds for thermophotovoltaics applications

    SciTech Connect (OSTI)

    Dutta, P.S.; Ostrogorsky, A.G.; Gutmann, R.J.

    1998-10-01

    In this paper, the bulk growth of crack-free GaInSb and single phase GaInAsSb alloys are presented. A new class of III-V quasi-binary [A{sub III}B{sub V}]{sub 12{minus}x}[C{sub III}D{sub V}]{sub x} semiconductor alloys has been synthesized and bulk crystals grown from the melt for the first time. The present investigation is focused on the quasi-binary alloy (GaSb){sub 1{minus}x}(InAs){sub x} (0 < x < 0.05) due to its importance for thermophotovoltaic applications. The structural properties of this melt-grown quasi-binary alloy are found to be significantly different from the conventional quaternary compound Ga{sub 1{minus}x}In{sub x}As{sub y}Sb{sub 1{minus}y} with composition x = y. Synthesis and growth procedures are discussed. For the growth of ternary alloys, it was demonstrated that forced convection or mixing in the melt during directional solidification of In{sub x}Ga{sub 1{minus}x}Sb (0 < x < 0.1) significantly reduces cracks in the crystals.

  18. Integrated optical and electrical modeling of plasmon-enhanced thin film photovoltaics: A case-study on organic devices

    SciTech Connect (OSTI)

    Rourke, D; Ahn, S; Nardes, AM; van de Lagemaat, J; Kopidakis, N; Park, W

    2014-09-21

    The nanoscale light control for absorption enhancement of organic photovoltaic (OPV) devices inevitably produces strongly non-uniform optical fields. These non-uniformities due to the localized optical modes are a primary route toward absorption enhancement in OPV devices. Therefore, a rigorous modeling tool taking into account the spatial distribution of optical field and carrier generation is necessary. Presented here is a comprehensive numerical model to describe the coupled optical and electrical behavior of plasmon-enhanced polymer: fullerene bulk heterojunction (BHJ) solar cells. In this model, a position-dependent electron-hole pair generation rate that could become highly non-uniform due to photonic nanostructures is directly calculated from the optical simulations. By considering the absorption and plasmonic properties of nanophotonic gratings included in two different popular device architectures, and applying the Poisson, current continuity, and drift/diffusion equations, the model predicts quantum efficiency, short-circuit current density, and desired carrier mobility ratios for bulk heterojunction devices incorporating nanostructures for light management. In particular, the model predicts a significant degradation of device performance when the carrier species with lower mobility are generated far from the collecting electrode. Consequently, an inverted device architecture is preferred for materials with low hole mobility. This is especially true for devices that include plasmonic nanostructures. Additionally, due to the incorporation of a plasmonic nanostructure, we use simulations to theoretically predict absorption band broadening of a BHJ into energies below the band gap, resulting in a 4.8% increase in generated photocurrent. (C) 2014 AIP Publishing LLC.

  19. Photovoltaic roof heat flux

    E-Print Network [OSTI]

    Samady, Mezhgan Frishta

    2011-01-01

    Effect of building integrated photovoltaics on microclimateof a building's integrated-photovoltaics on heating a n dgaps for building- integrated photovoltaics, Solar Energy

  20. FINAL REPORT OF RESEARCH ON CuxS/ (Cd,Zn)S PHOTOVOLTAIC SOLAR ENERGY CONVERTERS 3/77 - 9/79

    E-Print Network [OSTI]

    Chin, B.L.

    2013-01-01

    and (Cd,Zn)S/CuxS photovoltaic cells. The approach was tothe CuxS/(Cd,Zn)S photovoltaic cell in order to betterstudying CdS/CuxS photovoltaic cells, films prepared by the

  1. Presented at the 28 IEEE Photovoltaics Specialists Conference, Anchorage Alaska, September 17-22, 2000

    E-Print Network [OSTI]

    Sites, James R.

    Presented at the 28 th IEEE Photovoltaics Specialists Conference, Anchorage Alaska, September 17. Tarrant, Siemens Solar Industries, Camarillo, CA 93012 ABSTRACT Many thin-film CIS photovoltaic devices behavior. INTRODUCTION The modest transient behavior exhibited by many thin-film CIS photovoltaic devices

  2. Accumulation capacitance frequency dispersion of III-V metal-insulator-semiconductor devices due to disorder induced gap states

    SciTech Connect (OSTI)

    Galatage, R. V. [Department of Electrical Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Zhernokletov, D. M. [Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Dong, H.; Brennan, B.; Hinkle, C. L. [Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Wallace, R. M. [Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Vogel, E. M. [School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)

    2014-07-07

    The origin of the anomalous frequency dispersion in accumulation capacitance of metal-insulator-semiconductor devices on InGaAs and InP substrates is investigated using modeling, electrical characterization, and chemical characterization. A comparison of the border trap model and the disorder induced gap state model for frequency dispersion is performed. The fitting of both models to experimental data indicate that the defects responsible for the measured dispersion are within approximately 0.8 nm of the surface of the crystalline semiconductor. The correlation between the spectroscopically detected bonding states at the dielectric/III-V interface, the interfacial defect density determined using capacitance-voltage, and modeled capacitance-voltage response strongly suggests that these defects are associated with the disruption of the III-V atomic bonding and not border traps associated with bonding defects within the high-k dielectric.

  3. EELE408 Photovoltaics Lecture 20: Photovoltaic Systems

    E-Print Network [OSTI]

    Kaiser, Todd J.

    1 EELE408 Photovoltaics Lecture 20: Photovoltaic Systems Dr. Todd J. Kaiser tjkaiser into the grid 2 Application Areas 3 Photovoltaic System Basics · Photovoltaic Systems ­ Cell Panel Array · 6. Determine battery size for recommended reserve time Photovoltaic System Design Block Diagram Ph

  4. Photovoltaic manufacturing cost and throughput improvements for thin-film CIGS-based modules: Phase 1 technical report, July 1998--July 1999

    SciTech Connect (OSTI)

    Wiedeman, S.; Wendt, R.G.

    2000-03-01

    The primary objectives of the Global Solar Energy (GSE) Photovoltaic Manufacturing Technology (PVMaT) subcontract are directed toward reducing cost and expanding the production rate of thin-film CuInGaSe{sub 2} (CIGS)-based PV modules on flexible substrates. Improvements will be implemented in monolithic integration, CIGS deposition, contact deposition, and in-situ CIGS control and monitoring. In Phase 1, GSE has successfully attacked many of the highest risk aspects of each task. All-laser, selective scribing processes for CIGS have been developed, and many end-of-contract goals for scribing speed have been exceeded in the first year. High-speed ink-jet deposition of insulating material in the scribes now appears to be a viable technique, again exceeding some end-of-contract goals in the first year. Absorber deposition of CIGS was reduced corresponding to throughput speeds of up to 24-in/min, also exceeding an end-of-contract goal. Alternate back-contact materials have been identified that show potential as candidates for replacement of higher-cost molybdenum, and a novel, real-time monitoring technique (parallel-detector spectroscopic ellipsometry) has shown remarkable sensitivity to relevant properties of the CIGS absorber layer for use as a diagnostic tool. Currently, one of the bilayers has been baselined by GSE for flexible CIGS on polymeric substrates. Resultant back-contacts meet sheet-resistance goals and exhibit much less intrinsic stress than Mo. CIGS has been deposited, and resultant devices are comparable in performance to pure Mo back-contacts. Debris in the chamber has been substantially reduced, allowing longer roll-length between system cleaning.

  5. Bonding Geometries at the In2O and SiO/III-V Semiconductor Interface Jian Shena,b

    E-Print Network [OSTI]

    Kummel, Andrew C.

    . Annealing the In2O/InAs(001)-(4×2) surface to 380°C results in formation of flat ordered monolayer-2 (15,16), so enhancement mode III-V ECS Transactions, 33 (3) 105-116 (2010) 10.1149/1.3481597 © The Electrochemical Society 105 Downloaded 05 Oct 2010 to 192.55.55.37. Redistribution subject to ECS license

  6. Photovoltaics Special Research

    E-Print Network [OSTI]

    New South Wales, University of

    1999 Photovoltaics Special Research Centre UUNNSSWW 1999 Photovoltaics Special Research Centre The University of New South Wales Centre for Photovoltaic Engineering Electrical Engineering Building contains three sections which are colour coded as follows: Red: Photovoltaics Special Research Centre End

  7. Optimized III-V Multijunction Concentrator Solar Cells on Patterned Si and Ge Substrates: Final Technical Report, 15 September 2004--30 September 2006

    SciTech Connect (OSTI)

    Ringel, S. A.

    2008-11-01

    Goal is to demo realistic path to III-V multijunction concentrator efficiencies > 40% by substrate-engineering combining compositional grading with patterned epitaxy for small-area cells for high concentration.

  8. China Solar Photovoltaic Group CNPV aka Dongying Photovoltaic...

    Open Energy Info (EERE)

    Photovoltaic Group CNPV aka Dongying Photovoltaic Power Co Ltd or China Solar PV Jump to: navigation, search Name: China Solar Photovoltaic Group (CNPV, aka Dongying Photovoltaic...

  9. PROJECT PROFILE: Correlative Electronic Spectroscopies for Increasing Photovoltaic Efficiency

    Office of Energy Efficiency and Renewable Energy (EERE)

    Recombination limits open-circuit voltages in thin film photovoltaic (PV) devices to 60-65% of the thermodynamic limit. The project will develop fast, non-contact optical metrology methods to detect optically active defects in thin-film photovoltaic (PV) materials and map recombination velocities at shallow interfaces. These techniques will speed up the diagnostics and optimization of thin-film PV absorber materials and interfaces.

  10. III-V-N materials for super high-efficiency multijunction solar cells

    SciTech Connect (OSTI)

    Yamaguchi, Masafumi; Bouzazi, Boussairi; Suzuki, Hidetoshi; Ikeda, Kazuma; Kojima, Nobuaki; Ohshita, Yoshio

    2012-10-06

    We have been studying concentrator multi-junction solar cells under Japanese Innovative Photovoltaic R and D program since FY2008. InGaAsN is one of appropriate materials for 4-or 5-junction solar cell configuration because this material can be lattice-matched to GaAs and Ge substrates. However, present InGaAsN single-junction solar cells have been inefficient because of low minority-carrier lifetime due to N-related recombination centers and low carrier mobility due to alloy scattering and non-homogeneity of N. This paper presents our major results in the understanding of majority and minority carrier traps in GaAsN grown by chemical beam epitaxy and their relationships with the poor electrical properties of the materials.

  11. EELE408 Photovoltaics Lecture 15 Photovoltaic Devices

    E-Print Network [OSTI]

    Kaiser, Todd J.

    1 EELE408 Photovoltaics Lecture 15 Photovoltaic Devices Dr. Todd J. Kaiser tjkaiser) · Demonstrated the photovoltaic effect · Best results with UV or blue light 2 g · Electrodes covered with light of photovoltaic effect in an all solid state device · Several decades before the effect could be explained Fritts

  12. Continuous-wave quasi-phase-matched waveguide correlated photon pair source on a III–V chip

    SciTech Connect (OSTI)

    Sarrafi, Peyman Zhu, Eric Y.; Dolgaleva, Ksenia; Aitchison, J. Stewart; Qian, Li; Holmes, Barry M.; Hutchings, David C.

    2013-12-16

    We report on the demonstration of correlated photon pair generation in a quasi-phase-matched superlattice GaAs/AlGaAs waveguide using a continuous-wave pump. Our photon pair source has a low noise level and achieves a high coincidence-to-accidental ratio greater than 100, which is the highest value reported in III–V chips so far. This correlated photon pair source has the potential to be monolithically integrated with on-chip pump laser sources fabricated on the same superlattice wafer structure, enabling direct correlated/entangled photon pair production from a compact electrically powered chip.

  13. Electronic States and Optical Transitions in Bulk and Quantum Well Structures of III-V Compound Semiconductors 

    E-Print Network [OSTI]

    Cho, Yong Hee 1976-

    2011-05-06

    of GaInAs/AlInAs double quantum wells shown in Fig. 4-4, is followed on the lightly doped InP cladding which is positioned on the top of substrate. Highly doped 0.4 ?m-thick InP contact layer and Au contact are sequentially stacked above... AND OPTICAL TRANSITIONS IN BULK AND QUANTUM WELL STRUCTURES OF III-V COMPOUND SEMICONDUCTORS A Dissertation by YONG HEE CHO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  14. Photovoltaic Subcontract Program, FY 1991

    SciTech Connect (OSTI)

    Not Available

    1992-03-01

    This report summarizes the fiscal year (FY) 1991 (October 1, 1990, through September 30, 1991) progress of the subcontracted photovoltaic (PV) research and development (R D) performed under the Photovoltaic Advanced Research and Development Project at the National Renewable Energy Laboratory (NREL) -- formerly the Solar Energy Research Institute (SERI). The mission of the national PV program is to develop PV technology for large-scale generation of economically competitive electric power in the United States. The technical sections of the report cover the main areas of the subcontract program: the Amorphous Silicon Research Project, Polycrystalline Thin Films, Crystalline Silicon Materials Research, High-Efficiency Concepts, the New Ideas Program, the University Participation Program, and the Photovoltaic Manufacturing Technology (PVMaT) project. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1991, and future research directions.

  15. PROGRESS IN PHOTOVOLTAICS: RESEARCH AND APPLICATIONS Prog. Photovolt: Res. Appl. 2004; 12:93111 (DOI: 10.1002/pip.527)

    E-Print Network [OSTI]

    Romeo, Alessandro

    PROGRESS IN PHOTOVOLTAICS: RESEARCH AND APPLICATIONS Prog. Photovolt: Res. Appl. 2004; 12(In,Ga)Se2; thin-films; photovoltaics; solar energy INTRODUCTION P olycrystalline thin-film solar cells the complete solar spectrum for photovoltaic power conversion. There are several chalcopyr

  16. Towards large size substrates for III-V co-integration made by direct wafer bonding on Si

    SciTech Connect (OSTI)

    Daix, N., E-mail: dai@zurich.ibm.com; Uccelli, E.; Czornomaz, L.; Caimi, D.; Rossel, C.; Sousa, M.; Siegwart, H.; Marchiori, C.; Fompeyrine, J. [IBM Research - Zürich, Säumerstrasse 4, CH-8803 Rüschlikon (Switzerland); Hartmann, J. M. [CEA, LETI 17, rue des Martyrs, F-38054 Grenoble (France); Shiu, K.-T.; Cheng, C.-W.; Krishnan, M.; Lofaro, M.; Kobayashi, M.; Sadana, D. [IBM T. J. Watson Research Center, 1101 Kitchawan Rd., Route 134 Yorktown Heights, New York 10598 (United States)

    2014-08-01

    We report the first demonstration of 200 mm InGaAs-on-insulator (InGaAs-o-I) fabricated by the direct wafer bonding technique with a donor wafer made of III-V heteroepitaxial structure grown on 200 mm silicon wafer. The measured threading dislocation density of the In{sub 0.53}Ga{sub 0.47}As (InGaAs) active layer is equal to 3.5 × 10{sup 9} cm{sup ?2}, and it does not degrade after the bonding and the layer transfer steps. The surface roughness of the InGaAs layer can be improved by chemical-mechanical-polishing step, reaching values as low as 0.4 nm root-mean-square. The electron Hall mobility in 450 nm thick InGaAs-o-I layer reaches values of up to 6000 cm{sup 2}/Vs, and working pseudo-MOS transistors are demonstrated with an extracted electron mobility in the range of 2000–3000 cm{sup 2}/Vs. Finally, the fabrication of an InGaAs-o-I substrate with the active layer as thin as 90 nm is achieved with a Buried Oxide of 50 nm. These results open the way to very large scale production of III-V-o-I advanced substrates for future CMOS technology nodes.

  17. Inter-band optoelectronic properties in quantum dot structure of low band gap III-V semiconductors

    SciTech Connect (OSTI)

    Dey, Anup; Maiti, Biswajit; Chanda, Debasree

    2014-04-14

    A generalized theory is developed to study inter-band optical absorption coefficient (IOAC) and material gain (MG) in quantum dot structures of narrow gap III-V compound semiconductor considering the wave-vector (k{sup ?}) dependence of the optical transition matrix element. The band structures of these low band gap semiconducting materials with sufficiently separated split-off valance band are frequently described by the three energy band model of Kane. This has been adopted for analysis of the IOAC and MG taking InAs, InSb, Hg{sub 1?x}Cd{sub x}Te, and In{sub 1?x}Ga{sub x}As{sub y}P{sub 1?y} lattice matched to InP, as example of III–V compound semiconductors, having varied split-off energy band compared to their bulk band gap energy. It has been found that magnitude of the IOAC for quantum dots increases with increasing incident photon energy and the lines of absorption are more closely spaced in the three band model of Kane than those with parabolic energy band approximations reflecting the direct the influence of energy band parameters. The results show a significant deviation to the MG spectrum of narrow-gap materials having band nonparabolicity compared to the parabolic band model approximations. The results reflect the important role of valence band split-off energies in these narrow gap semiconductors.

  18. 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,

  19. Photovoltaic Films - Energy Innovation Portal

    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| DepartmentPeerFederal FleetUp in thePhotonPhotos

  20. Process Development for Nanostructured Photovoltaics

    SciTech Connect (OSTI)

    Elam, Jeffrey W.

    2015-01-01

    Photovoltaic manufacturing is an emerging industry that promises a carbon-free, nearly limitless source of energy for our nation. However, the high-temperature manufacturing processes used for conventional silicon-based photovoltaics are extremely energy-intensive and expensive. This high cost imposes a critical barrier to the widespread implementation of photovoltaic technology. Argonne National Laboratory and its partners recently invented new methods for manufacturing nanostructured photovoltaic devices that allow dramatic savings in materials, process energy, and cost. These methods are based on atomic layer deposition, a thin film synthesis technique that has been commercialized for the mass production of semiconductor microelectronics. The goal of this project was to develop these low-cost fabrication methods for the high efficiency production of nanostructured photovoltaics, and to demonstrate these methods in solar cell manufacturing. We achieved this goal in two ways: 1) we demonstrated the benefits of these coatings in the laboratory by scaling-up the fabrication of low-cost dye sensitized solar cells; 2) we used our coating technology to reduce the manufacturing cost of solar cells under development by our industrial partners.

  1. Photovoltaic roof heat flux

    E-Print Network [OSTI]

    Samady, Mezhgan Frishta

    2011-01-01

    designs (relatively) Photovoltaic Solar P a n e l AtmosphereCALIFORNIA, SAN DIEGO Photovoltaic Roof Heat Flux A ThesisABSTRACT OF T H E THESIS Photovoltaic Roof Heat Flux by

  2. Photovoltaics Life Cycle Analysis

    E-Print Network [OSTI]

    1 Photovoltaics Life Cycle Analysis Vasilis Fthenakis Center of Life Cycle Analysis Earth & Environmental Engineering Department Columbia University and National Photovoltaic (PV) EHS Research Center (air, water, solid) M, Q E PV array Photovoltaic modules Balance of System (BOS) (Inverters

  3. INTEGRATING PHOTOVOLTAIC SYSTEMS

    E-Print Network [OSTI]

    Delaware, University of

    INTEGRATING PHOTOVOLTAIC SYSTEMS INTO PUBLIC SECTOR PERFORMANCE CONTRACTS IN DELAWARE FINAL for Energy and Environmental Policy University of Delaware February 2006 #12;INTEGRATING PHOTOVOLTAIC..................................................................................................... 1 1.2 Photovoltaics in Performance Contracts: An Overview

  4. Amorphous Silicon-Carbon Nanostructure Photovoltaic Devices

    E-Print Network [OSTI]

    Schriver, Maria Christine

    2012-01-01

    and Photovoltaic Performance . . . . . . . . . . . . . . .Amorphous Silicon as a Photovoltaic Material 2.1.2ii Photovoltaic Model . . . . . . . . . . .

  5. Photovoltaic Technology Basics

    Broader source: Energy.gov [DOE]

    Photovoltaic (PV) materials and devices convert sunlight into electrical energy, and PV cells are commonly known as solar cells. Photovoltaics can literally be translated as light-electricity.

  6. NANOSCIENCE COLLOQUIUM DOUBLE FEATURE PHOTOVOLTAICS

    E-Print Network [OSTI]

    Linke, Heiner

    -space (Q179), Fysicum Modern Architectures for III-V Multi-Junction Solar Cells Frank Dimroth, Fraunhofer Institute for Solar Energy Systems, Freiburg, Germany Abstract: III-V multi-junction solar cells are currently investigated to further increase the efficiency of todays GaInP/GaInAs/Ge multi- junction solar

  7. EELE408 Photovoltaics Lecture 17 Photovoltaic Modules

    E-Print Network [OSTI]

    Kaiser, Todd J.

    1 EELE408 Photovoltaics Lecture 17 Photovoltaic Modules Dr. Todd J. Kaiser tjkaiser with the lowest output · Cells usually matched to each other · Shaded cell acts like poor cell ­ Significantly

  8. Using Self-Organization To Control Morphology in Molecular Photovoltaics

    E-Print Network [OSTI]

    in thin-film solar cells. A general understanding of how to control morphology in organic photovoltaicsUsing Self-Organization To Control Morphology in Molecular Photovoltaics Seok Ju Kang,,# Seokhoon-processed self- assembled heterojunction solar cells using dodecyloxy- substituted contorted hexabenzocoronene

  9. Photovoltaic effect in multiphase Bi-Mn-O thin J. P. Chakrabartty,1

    E-Print Network [OSTI]

    Photovoltaic effect in multiphase Bi-Mn-O thin films J. P. Chakrabartty,1 R. Nechache,2,4 C and therefore the photovoltaic conversion efficiency. Specifically, a higher Bi/Mn ratio (towards unity separation. ©2013 Optical Society of America OCIS codes: (040.5350) Photovoltaic; (160.2260) Ferroelectrics

  10. High-performance Si microwire photovoltaics Michael D. Kelzenberg,a

    E-Print Network [OSTI]

    Atwater, Harry

    High-performance Si microwire photovoltaics Michael D. Kelzenberg,a Daniel B. Turner-Evans,a Morgan for low- cost, thin-film photovoltaics. Here, we demonstrate VLS-grown Si microwires that have suitable electrical properties for high-perfor- mance photovoltaic applications, including long minority

  11. Cu(In,Ga)Se2based Photovoltaics: Challenges and Opportunities

    E-Print Network [OSTI]

    Firestone, Jeremy

    Cu(In,Ga)Se2­based Photovoltaics: Challenges and Opportunities William Shafarman Institute of Energy Conversion University of Delaware #12;Thin Film Photovoltaics Potential for low cost PV using a Thickness K.Kim, et al., IEEE J. Photovoltaics, 3, 446 (2013). 2 µm, 60 min reaction 1 µm, 25 min reaction 0

  12. 2012/12/27 2 2012/12/27 3

    E-Print Network [OSTI]

    Hung, Shih-Hao

    HBTSolar cell Thick film MOCVD MMIC Lasers (strained QW, dilute nitride, QD) Solar cell III-V on Si Sb-based III-V Rectifier HBT, HEMT, Solar cells III-V on Si III-V on Si Solar cellSolar cell GaN LED, LD, power, lighting (AlGaInP, GaN) Communication (LD and detectors) Photovoltaic: Solar cells Design-house Epi

  13. Photovoltaic cell assembly

    DOE Patents [OSTI]

    Beavis, Leonard C. (Albuquerque, NM); Panitz, Janda K. G. (Edgewood, NM); Sharp, Donald J. (Albuquerque, NM)

    1990-01-01

    A photovoltaic assembly for converting high intensity solar radiation into lectrical energy in which a solar cell is separated from a heat sink by a thin layer of a composite material which has excellent dielectric properties and good thermal conductivity. This composite material is a thin film of porous Al.sub.2 O.sub.3 in which the pores have been substantially filled with an electrophoretically-deposited layer of a styrene-acrylate resin. This composite provides electrical breakdown strengths greater than that of a layer consisting essentially of Al.sub.2 O.sub.3 and has a higher thermal conductivity than a layer of styrene-acrylate alone.

  14. PHOTOVOLTAICS SPECIAL RESEARCH

    E-Print Network [OSTI]

    New South Wales, University of

    PHOTOVOLTAICS SPECIAL RESEARCH CENTRE UNSW ANNUAL REPORT 1997 #12;PHOTOVOLTAICS SPECIAL RESEARCH CENTRE UNSW ANNUAL REPORT 1997 Photovoltaics Special Research Centre School of Electrical Engineering.labs@unsw.edu.au WWW: http://www.pv.unsw.edu.au THE UNIVERSITY OF NEW SOUTH WALES The Photovoltaics Special Research

  15. Photovoltaic solar concentrator

    DOE Patents [OSTI]

    Nielson, Gregory N.; Cruz-Campa, Jose Luis; Okandan, Murat; Resnick, Paul J.; Sanchez, Carlos Anthony; Clews, Peggy J.; Gupta, Vipin P.

    2015-09-08

    A process including forming a photovoltaic solar cell on a substrate, the photovoltaic solar cell comprising an anchor positioned between the photovoltaic solar cell and the substrate to suspend the photovoltaic solar cell from the substrate. A surface of the photovoltaic solar cell opposite the substrate is attached to a receiving substrate. The receiving substrate may be bonded to the photovoltaic solar cell using an adhesive force or a metal connecting member. The photovoltaic solar cell is then detached from the substrate by lifting the receiving substrate having the photovoltaic solar cell attached thereto and severing the anchor connecting the photovoltaic solar cell to the substrate. Depending upon the type of receiving substrate used, the photovoltaic solar cell may be removed from the receiving substrate or remain on the receiving substrate for use in the final product.

  16. Photovoltaics: New opportunities for utilities

    SciTech Connect (OSTI)

    Not Available

    1991-07-01

    This publication presents information on photovoltaics. The following topics are discussed: Residential Photovoltaics: The New England Experience Builds Confidence in PV; Austin's 300-kW Photovoltaic Power Station: Evaluating the Breakeven Costs; Residential Photovoltaics: The Lessons Learned; Photovoltaics for Electric Utility Use; Least-Cost Planning: The Environmental Link; Photovoltaics in the Distribution System; Photovoltaic Systems for the Rural Consumer; The Issues of Utility-Intertied Photovoltaics; and Photovoltaics for Large-Scale Use: Costs Ready to Drop Again.

  17. Photovoltaic Subcontract Program, FY 1990

    SciTech Connect (OSTI)

    Summers, K.A.

    1991-03-01

    This report summarizes the progress of the subcontracted photovoltaic (PV) research and development (R D) performed under the Photovoltaics Program at the Solar Energy Research Institute (SERI). The SERI subcontracted PV research and development represents most of the subcontracted R D that is funded by the US Department of Energy (DOE) National Photovoltaics Program. This report covers fiscal year (FY) 1990: October 1, 1989 through September 30, 1990. During FY 1990, the SERI PV program started to implement a new DOE subcontract initiative, entitled the Photovoltaic Manufacturing Technology (PVMaT) Project.'' Excluding (PVMaT) because it was in a start-up phase, in FY 1990 there were 54 subcontracts with a total annualized funding of approximately $11.9 million. Approximately two-thirds of those subcontracts were with universities, at a total funding of over $3.3 million. Cost sharing by industry added another $4.3 million to that $11.9 million of SERI PV subcontracted R D. The six technical sections of this report cover the previously ongoing areas of the subcontracted program: the Amorphous Silicon Research Project, Polycrystalline Thin Films, Crystalline Silicon Materials Research, High-Efficiency Concepts, the New Ideas Program, and the University Participation Program. Technical summaries of each of the subcontracted programs discuss approaches, major accomplishments in FY 1990, and future research directions. Another section introduces the PVMaT project and reports the progress since its inception in FY 1990. Highlights of technology transfer activities are also reported.

  18. Interfacial Engineering of Molecular Photovoltaics

    E-Print Network [OSTI]

    Shelton, Steven Wade

    2014-01-01

    Engineering of Molecular Photovoltaics by Steven WadeEngineering of Molecular Photovoltaics Copyright © 2014 byEngineering of Molecular Photovoltaics by Steven Wade

  19. Ultralight photovoltaic modules for unmanned aerial vehicles

    SciTech Connect (OSTI)

    Nowlan, M.J.; Maglitta, J.C.; Darkazalli, G.; Lamp, T.

    1997-12-31

    New lightweight photovoltaic modules are being developed for powering high altitude unmanned aerial vehicles (UAVs). Modified low-cost terrestrial solar cell and module technologies are being applied to minimize vehicle cost. New processes were developed for assembling thin solar cells, encapsulant films, and cover films. An innovative by-pass diode mounting approach that uses a solar cell as a heat spreader was devised and tested. Materials and processes will be evaluated through accelerated environmental testing.

  20. Effects of diethanolamine on sol–gel–processed Cu{sub 2}ZnSnS{sub 4} photovoltaic absorber thin films

    SciTech Connect (OSTI)

    Kahraman, S. Çetinkaya, S.; Çetinkara, H.A.; Güder, H.S.

    2014-02-01

    Highlights: • DEA content significantly affected the crystal structure and the phase purity. • The films’ crystallite sizes increased with increasing DEA content. • Two different impurity levels were found for each film via R-T characteristics. • Under different illuminations, the n-Si/CZTS exhibited good photo-response. • The light on/off current ratios confirmed the photo-sensitivity of the junction. - Abstract: As a promising solar absorber, the Cu{sub 2}ZnSnS{sub 4} compound has been popular recently for the production of green and economical thin-film solar cells owing to the abundancy and non-toxicity of all the constituents. In this study, we have produced Cu{sub 2}ZnSnS{sub 4} films via the sol–gel technique. As a stabilizer, the effects of the diethanolamine on the properties of the films were investigated. The amount of diethanolamine significantly affected the crystal structure, crystallite sizes and phase purity of the films. X-ray diffraction and Raman spectroscopy analyses confirmed the formation of phase-pure CZTS films. It was found that the film produced by using 2 ml of diethanolamine in sol exhibited pure CZTS phase, compact and dense morphology and enhanced photo-sensitivity. Light on/off current ratio of the n-Si/Cu{sub 2}ZnSnS{sub 4} junction was found to be 47 under 100 mW/cm{sup 2} of illumination. Electrical activation energies of the films were investigated and the variations were attributed to delocalized phonon states generating from the presence of other phases and lattice defects.

  1. Molecules as Segmented Storage Elements in Floating Gate Memories................................................................................................MAT.1 In-situ Deposition of High-k Dielectrics on a III-V Compound Semiconductor .............

    E-Print Network [OSTI]

    Reif, Rafael

    that are on the order of 1nm in size, representing a uniform set of identical nanostructured charge-storage centers. WeMaterials Molecules as Segmented Storage Elements in Floating Gate Memories ....................................................................................MAT.2 A CMOS-compatible Substrate and Contact Technology for Monolithic Integration of III-V Devices

  2. Controlling the Morphology of Polymer and Fullerene Blends in Organic Photovoltaics Through Sequential Processing and Self-Assembly

    E-Print Network [OSTI]

    Aguirre, Jordan C.

    2015-01-01

    by device optimization,” Advanced Materials, vol. 22, no.Optimization Differences in Sequentially Processed and Blendcast Films Much research goes into developing and testing novel photovoltaic materials

  3. Semiconductor-nanocrystal/conjugated polymer thin films

    DOE Patents [OSTI]

    Alivisatos, A. Paul (Oakland, CA); Dittmer, Janke J. (Munich, DE); Huynh, Wendy U. (Munich, DE); Milliron, Delia (Berkeley, CA)

    2010-08-17

    The invention described herein provides for thin films and methods of making comprising inorganic semiconductor-nanocrystals dispersed in semiconducting-polymers in high loading amounts. The invention also describes photovoltaic devices incorporating the thin films.

  4. Methods for producing complex films, and films produced thereby

    DOE Patents [OSTI]

    Duty, Chad E.; Bennett, Charlee J. C.; Moon, Ji -Won; Phelps, Tommy J.; Blue, Craig A.; Dai, Quanqin; Hu, Michael Z.; Ivanov, Ilia N.; Jellison, Jr., Gerald E.; Love, Lonnie J.; Ott, Ronald D.; Parish, Chad M.; Walker, Steven

    2015-11-24

    A method for producing a film, the method comprising melting a layer of precursor particles on a substrate until at least a portion of the melted particles are planarized and merged to produce the film. The invention is also directed to a method for producing a photovoltaic film, the method comprising depositing particles having a photovoltaic or other property onto a substrate, and affixing the particles to the substrate, wherein the particles may or may not be subsequently melted. Also described herein are films produced by these methods, methods for producing a patterned film on a substrate, and methods for producing a multilayer structure.

  5. Electroluminescence in photovoltaic cell

    E-Print Network [OSTI]

    Petraglia, Antonio; 10.1088/0031-9120/46/5/F01

    2011-01-01

    Here we propose two methods to get electroluminescence images from photovoltaic cells in a school or home lab.

  6. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    DOE Solar Energy Technologies Program

    2011-06-27

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  7. 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

  8. PROGRESS IN PHOTOVOLTAICS: RESEARCH AND APPLICATIONS Prog. Photovolt: Res. Appl. 2004; 12:3338 (DOI: 10.1002/pip.525)

    E-Print Network [OSTI]

    Romeo, Alessandro

    PROGRESS IN PHOTOVOLTAICS: RESEARCH AND APPLICATIONS Prog. Photovolt: Res. Appl. 2004; 12 INTRODUCTION T he polycrystalline CdTe/CdS thin-film solar cell is one of the most important photovoltaic,2 Recent measure- ments of the photovoltaic performance of CdTe solar cells irradiated with high

  9. Amorphous silicon photovoltaic devices

    DOE Patents [OSTI]

    Carlson, David E.; Lin, Guang H.; Ganguly, Gautam

    2004-08-31

    This invention is a photovoltaic device comprising an intrinsic or i-layer of amorphous silicon and where the photovoltaic device is more efficient at converting light energy to electric energy at high operating temperatures than at low operating temperatures. The photovoltaic devices of this invention are suitable for use in high temperature operating environments.

  10. PHOTOVOLTAICS EXCELLENCE IS

    E-Print Network [OSTI]

    New South Wales, University of

    #12;THE PHOTOVOLTAICS CENTRE OF EXCELLENCE IS A CENTRE OF EXCELLENCE OF THE AUSTRALIAN RESEARCH) Photovoltaics Centre of Excellence commenced at the University of New South Wales (UNSW) on 13th June, 2003 silicon photovoltaic research on three separate fronts, as well as to apply these advances to the related

  11. Photovoltaic device and method

    DOE Patents [OSTI]

    Cleereman, Robert; Lesniak, Michael J.; Keenihan, James R.; Langmaid, Joe A.; Gaston, Ryan; Eurich, Gerald K.; Boven, Michelle L.

    2015-11-24

    The present invention is premised upon an improved photovoltaic device ("PVD") and method of use, more particularly to an improved photovoltaic device with an integral locator and electrical terminal mechanism for transferring current to or from the improved photovoltaic device and the use as a system.

  12. Photovoltaic device and method

    DOE Patents [OSTI]

    Cleereman, Robert J; Lesniak, Michael J; Keenihan, James R; Langmaid, Joe A; Gaston, Ryan; Eurich, Gerald K; Boven, Michelle L

    2015-01-27

    The present invention is premised upon an improved photovoltaic device ("PVD") and method of use, more particularly to an improved photovoltaic device with an integral locator and electrical terminal mechanism for transferring current to or from the improved photovoltaic device and the use as a system.

  13. PHOTOVOLTAICS AND COMMERCIAL BUILDINGS--

    E-Print Network [OSTI]

    Perez, Richard R.

    PHOTOVOLTAICS AND COMMERCIAL BUILDINGS-- A NATURAL MATCH A study highlighting strategic opportunities and locations for using photovoltaics to power businesses #12;SHOULD PV BE IN YOUR BUSINESS PLAN know that solar energy is environ- mentally attractive--and that photovoltaic or PV systems have made

  14. Correlations in Characteristic Data of Concentrator Photovoltaics (Poster)

    SciTech Connect (OSTI)

    Sweet, C.; Bosco, N.; Kurtz, S.

    2011-02-01

    This study is motivated by a reported 1-2% infant mortality rate in concentrator photovoltaic cell assemblies. Approximately 650 bare III-V multi-junction PV cells were initially characterized via electroluminescence imaging and both light and dark current-voltage responses were recorded. The cells were then packaged into receivers and their IV response again evaluated both before and after an outdoor high concentration exposure of at least four hours above 750 DNI. Correlations exist between the initial dark IV characteristic and artifacts found in the EL image. Initial results also suggest that artifacts observed in the bare cell may serve as an indicator for early on-sun degradation, though may not be able to predict the infant mortality population.

  15. Novel Approaches to High-Efficiency III-V Nitride Heterostructure Emitters for Next-Generation Lighting Applications

    SciTech Connect (OSTI)

    Russell D. Dupuis

    2006-01-01

    We report research activities and technical progress on the development of high-efficiency long wavelength ({lambda} {approx} 540nm) green light emitting diodes which covers the second year of the three-year program ''Novel approaches to high-efficiency III-V nitride heterostructure emitters for next-generation lighting applications''. The second year activities were focused on the development of p-type layer that has less/no detrimental thermal annealing effect on green LED active region as well as excellent structural and electrical properties and the development of green LED active region that has superior luminescence quality for {lambda} {approx}540nm green LEDs. We have also studied the thermal annealing effect on blue and green LED active region during the p-type layer growth. As a progress highlight, we obtained green-LED-active-region-friendly In{sub 0.04}Ga{sub 0.96}N:Mg exhibiting low resistivity with higher hole concentration (p=2.0 x 10{sup 18} cm{sup -3} and a low resistivity of 0.5 {Omega}-cm) and improved optical quality green LED active region emitting at {lambda} {approx}540nm by electroluminescence. The active region of the green LEDs was found to be much more sensitive to the thermal annealing effect during the p-type layer growth than that of the blue LEDs. We have designed grown, fabricated green LED structures for both 520 nm and 540 nm for the evaluation of second year green LED development.

  16. Novel Approaches to High-Efficiency III-V Nitride Heterostructure Emitters for Next-Generation Lighting Applications

    SciTech Connect (OSTI)

    Russell Dupuis

    2007-06-30

    We report research activities and technical progress on the development of high-efficiency long wavelength ({lambda} {approx} 540nm) green light emitting diodes which covers whole years of the three-year program 'Novel approaches to high-efficiency III-V nitride heterostructure emitters for next-generation lighting applications'. The research activities were focused on the development of p-type layer that has less/no detrimental thermal annealing effect on as well as excellent structural and electrical properties and the development of green LED active region that has superior luminescence quality for {lambda}{approx}540nm green LEDs. We have also studied (1) the thermal annealing effect on blue and green LED active region during the p-type layer growth; (2) the effect of growth parameters and structural factors for LED active region on electroluminescence properties; (3) the effect of substrates and orientation on electrical and electro-optical properties of green LEDs. As a progress highlight, we obtained green-LED-active-region-friendly In{sub 0.04}Ga{sub 0.96}N:Mg exhibiting low resistivity with higher hole concentration (p=2.0 x 10{sup 18} cm{sup -3} and a low resistivity of 0.5 {omega}-cm) and improved optical quality green LED active region emitting at {approx}540nm by electroluminescence. The LEDs with p-InGaN layer can act as a quantum-confined Stark effect mitigation layer by reducing strain in the QW. We also have achieved (projected) peak IQE of {approx}25% at {lambda}{approx}530 nm and of {approx}13% at {lambda}{approx}545 nm. Visible LEDs on a non-polar substrate using (11-20) {alpha}-plane bulk substrates. The absence of quantum-confined Stark effect was confirmed but further improvement in electrical and optical properties is required.

  17. Fundamental Materials Research and Advanced Process Development for Thin-Film CIS-Based Photovoltaics: Final Technical Report, 2 October 2001 - 30 September 2005

    SciTech Connect (OSTI)

    Anderson, T. J.; Li, S. S.; Crisalle, O. D.; Craciun, V.

    2006-09-01

    The objectives for this thin-film copper-indium-diselenide (CIS) solar cell project cover the following areas: Develop and characterize buffer layers for CIS-based solar cell; grow and characterize chemical-bath deposition of Znx Cd1-xS buffer layers grown on CIGS absorbers; study effects of buffer-layer processing on CIGS thin films characterized by the dual-beam optical modulation technique; grow epitaxial CuInSe2 at high temperature; study the defect structure of CGS by photoluminescence spectroscopy; investigate deep-level defects in Cu(In,Ga)Se2 solar cells by deep-level transient spectroscopy; conduct thermodynamic modeling of the isothermal 500 C section of the Cu-In-Se system using a defect model; form alpha-CuInSe2 by rapid thermal processing of a stacked binary compound bilayer; investigate pulsed non-melt laser annealing on the film properties and performance of Cu(In,Ga)Se2 solar cells; and conduct device modeling and simulation of CIGS solar cells.

  18. Annual Report: Photovoltaic Subcontract Program FY 1991

    SciTech Connect (OSTI)

    Summers, K. A.

    1992-03-01

    This report summarizes the fiscal year (FY) 1991 (October 1, 1990, through September 30, 1991) progress of the subcontracted photovoltaic (PV) research and development (R&D) performed under the Photovoltaic Advanced Research and Development Project at the National Renewable Energy Laboratory (NREL)-formerly the Solar Energy Research Institute (SERI). The mission of the national PV program is to develop PV technology for large-scale generation of economically competitive electric power in the United States. The technical sections of the report cover the main areas of the subcontract program: the Amorphous Silicon Research Project, Polycrystalline Thin Films, Crystalline Silicon Materials Research, High Efficiency Concepts, the New Ideas Program, the University Participation Program, and the Photovoltaic Manufacturing Technology (PVMaT) project. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1991, and future research directions.

  19. Design principles for shift current photovoltaics

    E-Print Network [OSTI]

    Cook, Ashley M; de Juan, Fernando; Moore, Joel E

    2015-01-01

    While the basic principles and limitations of conventional solar cells are well understood, relatively little attention has gone toward evaluating and maximizing the potential efficiency of photovoltaic devices based on shift currents. In this work, a sum rule approach is introduced and used to outline design principles for optimizing shift currents for photon energies near the band gap, which depend on Berry connections as well as standard band structure. Using these we identify two new classes of shift current photovoltaics, ferroelectric polymer films and orthorhombic monochalcogenides, both of which exhibit peak photoresponsivities larger than predictions for previously known photovoltaics of this type. Using physically motivated tight-binding models, the full frequency dependent response of these materials is obtained. Exploring the phase space of these models, we find photoresponsivities that can exceed $100$ mA/W. These results show that considering the microscopic origin of shift current via effective...

  20. Photovoltaic Subcontract Program. Annual report, FY 1992

    SciTech Connect (OSTI)

    Not Available

    1993-03-01

    This report summarizes the fiscal year (FY) 1992 progress of the subcontracted photovoltaic (PV) research and development (R&D) performed under the Photovoltaic Advanced Research and Development Project at the National Renewable Energy Laboratory (NREL)-formerly the Solar Energy Research Institute (SERI). The mission of the national PV program is to develop PV technology for large-scale generation of economically competitive electric power in the United States. The technical sections of the report cover the main areas of the subcontract program: the Crystalline Materials and Advanced Concepts project, the Polycrystalline Thin Films project, Amorphous Silicon Research project, the Photovoltaic Manufacturing Technology (PVMaT) project, PV Module and System Performance and Engineering project, and the PV Analysis and Applications Development project. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1992, and future research directions.

  1. III-V single photon avalanche detector with built-in negative feedback for NIR photon detection

    E-Print Network [OSTI]

    Zhao, Kai

    2008-01-01

    K. Vondessonneck, Polyimide Passivation of In0.53ga0.47as,Low Stress Photodefinable Polyimide Product Information andPhotodiodes Passivated with Polyimide Thin-Film. Journal of

  2. Oscar Wilkie BE in Photovoltaics

    E-Print Network [OSTI]

    New South Wales, University of

    Oscar Wilkie BE in Photovoltaics and solar EnErgy EnginEEring What dO PhOtOvOltaics engineers dO? Photovoltaics engineering focuses on the manufacture and use of photovoltaic solar cells to generate electricity with an increased need for specialised photovoltaics engineers and there are constantly new opportunities arising

  3. Photovoltaic cell with light trapping for enhanced efficiency

    DOE Patents [OSTI]

    Brener, Igal; Fofang, Nche Tumasang; Luk, Ting S.

    2015-11-19

    The efficiency of a photovoltaic cell is enhanced by light trapping using Mie-scattering nanostructures. In one embodiment, an array of nanocylinders is formed on the front surface of a silicon film to enhance forward scattering into the film, and an array of nanocylinders is formed on the back surface to enhance backscattering so that more light is absorbed within the silicon film. In an alternate embodiment, a mirror layer is formed on the back surface of the silicon film to reflect light within the film back toward the front-surface nanocylinder array.

  4. Advances in amorphous silicon photovoltaic technology

    SciTech Connect (OSTI)

    Carlson, D.E.; Rajan, K.; Arya, R.R.; Willing, F.; Yang, L.

    1998-10-01

    With the advent of new multijunction thin film solar cells, amorphous silicon photovoltaic technology is undergoing a commercial revival with about 30 megawatts of annual capacity coming on-line in the next year. These new {ital a}{endash}Si multijunction modules should exhibit stabilized conversion efficiencies on the order of 8{percent}, and efficiencies over 10{percent} may be obtained in the next several years. The improved performance results from the development of amorphous and microcrystalline silicon alloy films with improved optoelectronic properties and from the development of more efficient device structures. Moreover, the manufacturing costs for these multijunction modules using the new large-scale plants should be on the order of {dollar_sign}1 per peak watt. These new modules may find widespread use in solar farms, photovoltaic roofing, as well as in traditional remote applications. {copyright} {ital 1998 Materials Research Society.}

  5. Amorphous Silicon-Carbon Nanostructure Photovoltaic Devices

    E-Print Network [OSTI]

    Schriver, Maria Christine

    2012-01-01

    cells: An overview. Progress in Photovoltaics: Research andnanoparticles. Progress in Photovoltaics, 19( 3):260–265,

  6. Photovoltaic technology assessment

    SciTech Connect (OSTI)

    Backus, C.E.

    1981-01-01

    After a brief review of the history of photovoltaic devices and a discussion of the cost goals set for photovoltaic modules, the status of photovoltaic technology is assessed. Included are discussions of: current applications, present industrial production, low-cost silicon production techniques, energy payback periods for solar cells, advanced materials research and development, concentrator systems, balance-of-system components. Also discussed are some nontechnical aspects, including foreign markets, US government program approach, and industry attitudes and approaches. (LEW)

  7. Solar Photovoltaic SPECIFICATION, CHECKLIST...

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

    CHECKLIST AND GUIDE Renewable Energy Ready Home Renewable Energy Ready Home SOLAR PHOTOVOLTAIC SPECIFICATION, CHECKLIST AND GUIDE i Table of Contents About the...

  8. Lab Breakthrough: Microelectronic Photovoltaics

    Broader source: Energy.gov [DOE]

    Sandia's glitter-sized photovoltaic cells are highly efficient and cost effective – the perfect combination for a game-changing technology.

  9. National Laboratory Photovoltaics Research

    Broader source: Energy.gov [DOE]

    DOE supports photovoltaic (PV) research and development and facilities at its national laboratories to accelerate progress toward achieving the SunShot Initiative's technological and economic...

  10. Concentrating Photovoltaics (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-01-20

    Solar is growing rapidly, and the concentrating photovoltaics industry-both high- and low-concentration cell approaches-may be ready to ramp production in 2009.

  11. Photovoltaics Business Models

    SciTech Connect (OSTI)

    Frantzis, L.; Graham, S.; Katofsky, R.; Sawyer, H.

    2008-02-01

    This report summarizes work to better understand the structure of future photovoltaics business models and the research, development, and demonstration required to support their deployment.

  12. 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

  13. CX-009549: Categorical Exclusion Determination

    Office of Energy Efficiency and Renewable Energy (EERE)

    Vapor Transport Deposition for Thin Film III-V Photovoltaics CX(s) Applied: A9, B3.6 Date: 11/09/2012 Location(s): CX: none Offices(s): Golden Field Office

  14. NREL: Photovoltaics Research - Thin Film Photovoltaic Partnership Project

    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 NewsInformationJessework usesof EnergyY-12WorkingSolar Energy Research Facility PhotoThin

  15. Photovoltaic device using single wall carbon nanotubes and method of fabricating the same

    DOE Patents [OSTI]

    Biris, Alexandru S.; Li, Zhongrui

    2012-11-06

    A photovoltaic device and methods for forming the same. In one embodiment, the photovoltaic device has a silicon substrate, and a film comprising a plurality of single wall carbon nanotubes disposed on the silicon substrate, wherein the plurality of single wall carbon nanotubes forms a plurality of heterojunctions with the silicon in the substrate.

  16. Microsystems Enabled Photovoltaics

    ScienceCinema (OSTI)

    Gupta, Vipin; Nielson, Greg; Okandan, Murat, Granata, Jennifer; Nelson, Jeff; Haney, Mike; Cruz-Campa, Jose Luiz

    2014-06-23

    Sandia's microsystems enabled photovoltaic advances combine mature technology and tools currently used in microsystem production with groundbreaking advances in photovoltaics cell design, decreasing production and system costs while improving energy conversion efficiency. The technology has potential applications in buildings, houses, clothing, portable electronics, vehicles, and other contoured structures.

  17. Photovoltaics industry profile

    SciTech Connect (OSTI)

    1980-10-01

    A description of the status of the US photovoltaics industry is given. Principal end-user industries are identified, domestic and foreign market trends are discussed, and industry-organized and US government-organized trade promotion events are listed. Trade associations and trade journals are listed, and a photovoltaic product manufacturers list is included. (WHK)

  18. Elucidating efficiency losses in cuprous oxide (Cu?O) photovoltaics and identifying strategies for efficiency improvement

    E-Print Network [OSTI]

    Brandt, Riley Eric

    2013-01-01

    In this thesis, I fabricated and characterized a series of thin-film cuprous oxide (Cu?O) photovoltaic devices. I constructed several different device designs, using sputtered and electrochemically deposited Cu?O. ...

  19. GaN/Cu[subscript 2]O Heterojunctions for Photovoltaic Applications

    E-Print Network [OSTI]

    Hering, K.P.

    Several growth methods were employed to investigate the photovoltaic behavior of GaN/Cu[subscript 2]O heterojunctions by depositing cuprous oxide thin films on top of gallium nitride templates. The templates consist of a ...

  20. An analysis of the photovoltaic value chain for reviewing solar energy policy in Massachusetts

    E-Print Network [OSTI]

    Dean, Ryan, S. B. (Ryan G.) Massachusetts Institute of Technology

    2008-01-01

    We explore the photovoltaic value chain for 1st generation crystalline silicon, 2nd generation thin film and 3rd generation organic/ dye-sensitized PV in an effort to evaluate two levels of policy options intended to create ...

  1. Photovoltaics Centre of Excellence The Photovoltaics Centre of Excellence

    E-Print Network [OSTI]

    New South Wales, University of

    Photovoltaics Centre of Excellence #12;The Photovoltaics Centre of Excellence is a Centre;#12;Photovoltaics involve the direct conversion of light, normally sunlight, into electricity when falling upon to its leading role in microelectronics. The Australian Research Council (ARC) Photovoltaics Centre

  2. Editorial: Photovoltaic Materials and Devices

    SciTech Connect (OSTI)

    Sopori, B.; Tan, T.; Rupnowski, P.

    2012-01-01

    As the global energy needs grow, there is increasing interest in the generation of electricity by photovoltaics (PVs) devices or solar cells - devices that convert sunlight to electricity. Solar industry has seen an enormous growth during the last decade. The sale of PV modules has exceeded 27 GW in 2011, with significant contributions to the market share from all technologies. While the silicon technology continues to have the dominant share, the other thin film technologies (CdTe, CIGS, a-Si, and organic PV) are experiencing fast growth. Increased production of silicon modules has led to a very rapid reduction in their price and remains as benchmark for other technologies. The PV industry is in full gear to commercialize new automated equipment for solar cell and module production, instrumentation for process monitoring technologies, and for implementation of other cost-reduction approaches, and extensive research continues to be carried out in many laboratories to improve the efficiency of solar cells and modules without increasing the production costs. A large variety of solar cells, which differ in the material systems used, design, PV structure, and even the principle of PV conversion, are designed to date. This special issue contains peer-reviewed papers in the recent developments in research related to broad spectrum of photovoltaic materials and devices. It contains papers on many aspects of solar cells-the growth and deposition, characterization, and new material development.

  3. ANNUAL REPORT 1998 PHOTOVOLTAICS GROUP

    E-Print Network [OSTI]

    New South Wales, University of

    ANNUAL REPORT 1998 UNSW PHOTOVOLTAICS GROUP ANNUAL REPORT 1998 UNSW PHOTOVOLTAICS GROUP #12;THE UNIVERSITY OF NEW SOUTH WALES THE PHOTOVOLTAICS SPECIAL RESEARCH CENTRE IS A SPECIAL RESEARCH CENTRE OF THE AUSTRALIAN RESEARCH COUNCIL THE KEY CENTRE FOR PHOTOVOLTAIC ENGINEERING IS A KEY CENTRE OF THE AUSTRALIAN

  4. Characterization of 3D Photovoltaics

    E-Print Network [OSTI]

    Characterization of 3D Photovoltaics SEMICONDUCTORS Our goal is to provide industry with test structures and models of next-generation photovoltaics, with an initial focus on cadmium telluride (Cd (nanostructured) photovoltaic devices. Objective Impact and Customers · The U.S. Photovoltaic Industry Roadmap

  5. I studied the properties of novel Co2FeAl0.5Si0.5 (CFAS), ZnGeAs2, and FeS2 (pyrite) thin films for microelectronic applications ranging from spintronic to photovoltaic.

    E-Print Network [OSTI]

    for microelectronic applications ranging from spintronic to photovoltaic. CFAS is a half metal with theoretical spin polarization of 100%. I investigated its potential as a spin injector, for spintronic applications, by studying

  6. Metallic nanostructures for optoelectronic and photovoltaic applications

    E-Print Network [OSTI]

    Lim, Swee Hoe

    2009-01-01

    enhanced performance of photovoltaic and photodetector Proc.and H. Wagner, in Photovoltaic Specialists Conference. ,for Optoelectronic and Photovoltaic Applications by Swee Hoe

  7. Amorphous Silicon-Carbon Nanostructure Photovoltaic Devices

    E-Print Network [OSTI]

    Schriver, Maria Christine

    2012-01-01

    costs for installed photovoltaic systems. This graph showsOne dollar per watt photovoltaic systems workshop sum- mary,costs for installed photovoltaic systems. This graph shows

  8. PROJECT PROFILE: Rapid Development of Disruptive Photovoltaic Technologies

    Broader source: Energy.gov [DOE]

    This project aims to demonstrate potentially disruptive, novel photovoltaic (PV) absorbers by developing proof-of-concept PV device prototypes composed of defect-tolerant inorganic thin film oxide/nitride absorbers. “Defect tolerance” is the tendency of a semiconductor to maintain good transport and doping properties despite the presence of crystallographic defects and is a key property of promising PV materials.

  9. Photovoltaic Cell Performance Basics

    Broader source: Energy.gov [DOE]

    Photovoltaic (PV), or solar cells use the energy in sunlight to produce electricity. However, the amount of electricity produced depends on the quality of the light available and the performance of the PV cell.

  10. Photovoltaic roof heat flux

    E-Print Network [OSTI]

    Samady, Mezhgan Frishta

    2011-01-01

    e l Atmosphere ceiling, back panel roof, exposed roof insideSAN DIEGO Photovoltaic Roof Heat Flux A Thesis submitted i no n Convection Exposed Roof Temperature Seasonal Temperature

  11. Photovoltaic decision analysis

    E-Print Network [OSTI]

    Goldman, Neil L.

    1977-01-01

    This paper is concerned with the development and implementation of a methodology that analyzes information relating to the choice between flat plate and concentrator technologies for photovoltaic development. A

  12. Crystalline Silicon Photovoltaics Research

    Broader source: Energy.gov [DOE]

    DOE supports crystalline silicon photovoltaic (PV) research and development efforts that lead to market-ready technologies. Below are a list of the projects, summary of the benefits, and discussion...

  13. Organic Photovoltaics Research

    Broader source: Energy.gov [DOE]

    DOE funds research and development projects related to organic photovoltaics (OPV) due to the unique benefits of the technology. Below is a list of the projects, summary of the benefits, and...

  14. Three-dimensional photovoltaics

    E-Print Network [OSTI]

    Myers, Bryan

    The concept of three-dimensional (3D) photovoltaics is explored computationally using a genetic algorithm to optimize the energy production in a day for arbitrarily shaped 3D solar cells confined to a given area footprint ...

  15. Organic photovoltaics and concentrators

    E-Print Network [OSTI]

    Mapel, Jonathan King

    2008-01-01

    The separation of light harvesting and charge generation offers several advantages in the design of organic photovoltaics and organic solar concentrators for the ultimate end goal of achieving a lower cost solar electric ...

  16. Photovoltaic solar cell

    DOE Patents [OSTI]

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

    2014-05-20

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

  17. Photovoltaic Research Facilities

    Office of Energy Efficiency and Renewable Energy (EERE)

    The U.S. Department of Energy (DOE) funds photovoltaic (PV) research and development (R&D) at its national laboratory facilities located throughout the country. To encourage further innovation,...

  18. Photovoltaic solar cell

    DOE Patents [OSTI]

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

    2013-11-26

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

  19. Amonix Photovoltaic System

    Broader source: Energy.gov [DOE]

    This photograph features the Amonix and Arizona Public Service (APS) partnership to install the world’s largest utility-scale concentrating photovoltaic (CPV) power plant in 2002. Photovoltaic (PV) systems at the APS facility use a combination of technologies. The systems in the foreground are single-axis tracking flat-plate silicon systems. Shown in the upper right are three large (35 kilowatt) Amonix CPV.

  20. Photovoltaics: The next generation

    SciTech Connect (OSTI)

    Wilson, A.

    1986-08-01

    The development of photovoltaics in the United States, with a few notable exceptions, has been carried out by the oil industry. Companies such as Arco, Exxon, Mobil and Sohio have played a tremendously important role in bringing photovoltaic technology to its current state of development. Many of these companies are continuing very active programs in pv, including the investigation of new and potentially far-reaching technologies.

  1. Photovoltaic systems and applications

    SciTech Connect (OSTI)

    Not Available

    1982-01-01

    Abstracts are given of presentations given at a project review meeting held at Albuquerque, NM. The proceedings cover the past accomplishments and current activities of the Photovoltaic Systems Research, Balance-of-System Technology Development and System Application Experiments Projects at Sandia National Laboratories. The status of intermediate system application experiments and residential system analysis is emphasized. Some discussion of the future of the Photovoltaic Program in general, and the Sandia projects in particular is also presented.

  2. Photovoltaic module and interlocked stack of photovoltaic modules

    DOE Patents [OSTI]

    Wares, Brian S.

    2014-09-02

    One embodiment relates to an arrangement of photovoltaic modules configured for transportation. The arrangement includes a plurality of photovoltaic modules, each photovoltaic module including a frame. A plurality of individual male alignment features and a plurality of individual female alignment features are included on each frame. Adjacent photovoltaic modules are interlocked by multiple individual male alignment features on a first module of the adjacent photovoltaic modules fitting into and being surrounded by corresponding individual female alignment features on a second module of the adjacent photovoltaic modules. Other embodiments, features and aspects are also disclosed.

  3. Photovoltaic effect of lead-free (Na{sub 0.82}K{sub 0.18}){sub 0.5}Bi{sub 4.5}Ti{sub 4}O{sub 15} ferroelectric thin film using Pt and indium tin oxide top electrodes

    SciTech Connect (OSTI)

    Seok Woo, Won; Sik Won, Sung; Won Ahn, Chang; Chae, Song A; Won Kim, Ill, E-mail: kimiw@mail.ulsan.ac.kr [Department of Physics and Energy Harvest-Storage Research Center (EHSRC), University of Ulsan, Ulsan 680-749 (Korea, Republic of); Ullah, Aman [Department of Physics, University of Science and Technology, Bannu, Khyber Pakhtunkhwa (Pakistan)

    2014-01-21

    We have grown a Bi-layer structure (Na{sub 0.82}K{sub 0.18}){sub 0.5}Bi{sub 4.5}Ti{sub 4}O{sub 15} (NKBiT) ferroelectric thin film on Pt(111)/TiO{sub 2}/SiO{sub 2}/Si(100) substrate by using the chemical solution deposition method and deposited two kinds of thin Pt and indium tin oxide (ITO) top electrodes. The photovoltaic behaviors of Pt/NKBiT/Pt and ITO/NKBit/Pt capacitors were investigated over the wavelength range of 300–500?nm. When NKBiT thin film is illuminated by the corresponding wavelength of the film's energy band gap (E{sub g}), a photocurrent is generated due to the Schottky barrier between electrode and film, and an internal electric field is originated by the depolarization field. The maximum photocurrent density and power conversion efficiency of the ITO/NKBiT/Pt capacitor in the poled-up state are obtained as 45.75?nA/cm{sup 2} and 0.035%, respectively, at 352?nm. The photocurrent density and power conversion efficiency of the ITO/NKBiT/Pt capacitor increased to 3.5 times higher than that of the Pt/NKBiT/Pt capacitor.

  4. Sustainability of Large Photovoltaic Deployment: Environmental Research

    E-Print Network [OSTI]

    Homes, Christopher C.

    Sustainability of Large Photovoltaic Deployment: Environmental Research Sustainability of Large Photovoltaic Deployment: Environmental ResearchEnvironmental ResearchEnvironmental Research Vasilis Fthenakis and Te from Cadmium Telluride Photovoltaic Manufacturing Scrap, Progress in Photovoltaics: Research

  5. General Services Administration Photovoltaics Project in Sacramento...

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

    General Services Administration Photovoltaics Project in Sacramento, California General Services Administration Photovoltaics Project in Sacramento, California Document describes a...

  6. Summary of trends in photovoltaic patent activity

    SciTech Connect (OSTI)

    Levine, L.O.

    1984-06-01

    This report presents information on patent activity for inventions concerning photovoltaic cell technology. Such information can aid in the assessment of the status and direction of technological development. A total of 729 US patents that issued between mid-1962 and the end of 1982, were individually examined and classified into several technical categories for this study. Computerized analysis of trends in patent activity among major technical categories was performed. The level of inventive activity increased dramatically in the mid-1970's. It appears to have peaked in 1978 and remained steady through 1980. The data indicates that, beginning in 1978, an increasing proportion of inventions were among approaches other than the conventional Cz type cells, specifically thin film and concentrator cells. Thin film and Cz type photovoltaic cells represent two-thirds of the patents analyzed. Among thin film patents, silicon and cadmium containing cells represent about two-thirds of the patents analyzed. Further insight into recent trends could be obtained by adding more recently issued patents to the database.

  7. Ultrafast Photovoltaic Response in Ferroelectric Nanolayers

    SciTech Connect (OSTI)

    Daranciang, Dan

    2012-02-15

    We show that light drives large-amplitude structural changes in thin films of the prototypical ferroelectric PbTiO3 via direct coupling to its intrinsic photovoltaic response. Using time-resolved x-ray scattering to visualize atomic displacements on femtosecond timescales, photoinduced changes in the unit-cell tetragonality are observed. These are driven by the motion of photogenerated free charges within the ferroelectric and can be simply explained by a model including both shift and screening currents, associated with the displacement of electrons first antiparallel to and then parallel to the ferroelectric polarization direction.

  8. Biaxially oriented film on flexible polymeric substrate

    DOE Patents [OSTI]

    Finkikoglu, Alp T. (Los Alamos, NM); Matias, Vladimir (Santa Fe, NM)

    2009-10-13

    A flexible polymer-based template having a biaxially oriented film grown on the surface of a polymeric substrate. The template having the biaxially oriented film can be used for further epitaxial growth of films of interest for applications such as photovoltaic cells, light emitting diodes, and the like. Methods of forming such a flexible template and providing the polymeric substrate with a biaxially oriented film deposited thereon are also described.

  9. The research field of the Laboratory for Chalcogenide Photovoltaics (LCP) of the department of Energy and Semiconductor Research (EHF) of the Institute of Physics at the Carl-von-Ossietzky University of

    E-Print Network [OSTI]

    Peinke, Joachim

    The research field of the Laboratory for Chalcogenide Photovoltaics (LCP) of the department, the photovoltaic has become a substantial part of the energy supply by renewable energies. Further research effort in this field is necessary to let photovoltaic remain economical attractive. Thin-film solar cells on basis

  10. This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination. IEEE JOURNAL OF PHOTOVOLTAICS 1

    E-Print Network [OSTI]

    Atwater, Harry

    as presented, with the exception of pagination. IEEE JOURNAL OF PHOTOVOLTAICS 1 Gallium Arsenide Solar Cell--Gallium arsenide, nanospheres, photovoltaic systems, whispering gallery modes (WGMs). I. INTRODUCTION THE route as the active layer is thinned [2]. Thin-film photovoltaics offer the possibility to significantly reduce

  11. Nanowires enabling strained photovoltaics

    SciTech Connect (OSTI)

    Greil, J.; Bertagnolli, E.; Lugstein, A.; Birner, S.

    2014-04-21

    Photovoltaic nano-devices have largely been relying on charge separation in conventional p-n junctions. Junction formation via doping, however, imposes major challenges in process control. Here, we report on a concept for photovoltaic energy conversion at the nano scale without the need for intentional doping. Our approach relies on charge carrier separation in inhomogeneously strained germanium nanowires (Ge NWs). This concept utilizes the strain-induced gradient in bandgap along tapered NWs. Experimental data confirms the feasibility of strain-induced charge separation in individual vapor-liquid-solid grown Ge NW devices with an internal quantum efficiency of ?5%. The charge separation mechanism, though, is not inherently limited to a distinct material. Our work establishes a class of photovoltaic nano-devices with its opto-electronic properties engineered by size, shape, and applied strain.

  12. Technical Potential for Solar Photovoltaics

    E-Print Network [OSTI]

    Branoff, Theodore J.

    Technical Potential for Solar Photovoltaics in Illinois May 2013 #12;Authors ...................................................................................................... 1.1 Utility-Scale Solar Photovoltaic Systems in the U.S. ........................... 1.2 Previous ...................................................................................................... 3.1 Optimization Matrix for Large-Scale PV System Applications ......... 3.2 Photovoltaic

  13. DOE Office of Science Funded Basic Research at NREL that Impacts Photovoltaic Technologies

    SciTech Connect (OSTI)

    Deb, S. K.

    2005-01-01

    The DOE Office of Science, Basic Energy Sciences, supports a number of basic research projects in materials, chemicals, and biosciences at the National Renewable Energy Laboratory (NREL) that impact several renewable energy technologies, including photovoltaics (PV). The goal of the Material Sciences projects is to study the structural, optical, electrical, and defect properties of semiconductors and related materials using state-of-the-art experimental and theoretical techniques. Specific projects involving PV include: ordering in III-V semiconductors, isoelectronic co-doping, doping bottlenecks in semiconductors, solid-state theory, and computational science. The goal of the Chemical Sciences projects is to advance the fundamental understanding of the relevant science involving materials, photochemistry, photoelectrochemistry, nanoscale chemistry, and catalysis that support solar photochemical conversion technologies. Specific projects relating to PV include: dye-sensitized TiO2 solar cells, semiconductor nanostructures, and molecular semiconductors. This presentation will give an overview of some of the major accomplishments of these projects.

  14. Integration of Self-Assembled Porous Alumina and Distributed Bragg Reflector for Light Trapping in Si Photovoltaic Devices

    E-Print Network [OSTI]

    Sheng, Xing

    Light trapping is an important issue for thin film silicon photovoltaic cells due to the limited absorption coefficient for near infrared light. In this letter, we present a photonic structure that combines porous anodic ...

  15. High efficiency photovoltaic device

    DOE Patents [OSTI]

    Guha, Subhendu (Troy, MI); Yang, Chi C. (Troy, MI); Xu, Xi Xiang (Findlay, OH)

    1999-11-02

    An N-I-P type photovoltaic device includes a multi-layered body of N-doped semiconductor material which has an amorphous, N doped layer in contact with the amorphous body of intrinsic semiconductor material, and a microcrystalline, N doped layer overlying the amorphous, N doped material. A tandem device comprising stacked N-I-P cells may further include a second amorphous, N doped layer interposed between the microcrystalline, N doped layer and a microcrystalline P doped layer. Photovoltaic devices thus configured manifest improved performance, particularly when configured as tandem devices.

  16. Concentrating photovoltaic solar panel

    DOE Patents [OSTI]

    Cashion, Steven A; Bowser, Michael R; Farrelly, Mark B; Hines, Braden E; Holmes, Howard C; Johnson, Jr., Richard L; Russell, Richard J; Turk, Michael F

    2014-04-15

    The present invention relates to photovoltaic power systems, photovoltaic concentrator modules, and related methods. In particular, the present invention features concentrator modules having interior points of attachment for an articulating mechanism and/or an articulating mechanism that has a unique arrangement of chassis members so as to isolate bending, etc. from being transferred among the chassis members. The present invention also features adjustable solar panel mounting features and/or mounting features with two or more degrees of freedom. The present invention also features a mechanical fastener for secondary optics in a concentrator module.

  17. Organic photovoltaic cells with controlled polarization sensitivity

    SciTech Connect (OSTI)

    Awartani, Omar; O'Connor, Brendan T., E-mail: btoconno@ncsu.edu [Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695 (United States); Kudenov, Michael W. [Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695 (United States)

    2014-03-03

    In this study, we demonstrate linearly polarized organic photovoltaic cells with a well-controlled level of polarization sensitivity. The polarized devices were created through the application of a large uniaxial strain to the bulk heterojunction poly(3-hexylthiophene):Phenyl-C61-butyric acid methyl ester (P3HT:PCBM) film and printing the plastically deformed active layer onto a PEDOT:PSS and indium tin oxide coated glass substrate. The P3HT:PCBM layer is processed such that it is able to accommodate high strains (over 100%) without fracture. After printing the strained films, thermal annealing is used to optimize solar cell performance while maintaining polarization sensitivity. A dichroic ratio and short circuit current ratio of ?6.1 and ?1.6 were achieved, respectively.

  18. Photovoltaic Energy Conversion

    E-Print Network [OSTI]

    Glashausser, Charles

    Photovoltaic Energy Conversion Frank Zimmermann #12;Solar Electricity Generation Consumes no fuel Electrode Valence Band Conduction Band Fermi Level I- /I3 - Redox Potential Dye 1D 3D* 1D* Energy Levels Counter Electrode Valence Band Conduction Band Fermi Level I- /I3 - Redox Potential Dye 1D 3D* 1D* Energy

  19. Formed photovoltaic module busbars

    DOE Patents [OSTI]

    Rose, Douglas; Daroczi, Shan; Phu, Thomas

    2015-11-10

    A cell connection piece for a photovoltaic module is disclosed herein. The cell connection piece includes an interconnect bus, a plurality of bus tabs unitarily formed with the interconnect bus, and a terminal bus coupled with the interconnect bus. The plurality of bus tabs extend from the interconnect bus. The terminal bus includes a non-linear portion.

  20. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    DOE Solar Energy Technologies Program

    2011-10-13

    DOE works with national labs, academia, and industry to support the domestic photovoltaics (PV) industry and research enterprise. SunShot aims to achieve widespread, unsubsidized cost-competitiveness through an applied research and development (R&D) portfolio spanning PV materials, devices, and manufacturing technologies.

  1. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-10-01

    DOE works with national labs, academia, and industry to support the domestic photovoltaics (PV) industry and research enterprise. SunShot aims to achieve widespread, unsubsidized cost-competitiveness through an applied research and development (R&D) portfolio spanning PV materials, devices, and manufacturing technologies.

  2. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-11-01

    The U.S. Department of Energy (DOE) works with industry, academia, national laboratories, and other government agencies to advance solar photovoltaics (PV) domestically. The SunShot Initiative aims to achieve widespread, unsubsidized cost-competitiveness through an applied research and development (R&D) portfolio spanning PV materials, devices, and manufacturing technologies.

  3. Photovoltaic module and interlocked stack of photovoltaic modules

    DOE Patents [OSTI]

    Wares, Brian S.

    2012-09-04

    One embodiment relates to an arrangement of photovoltaic modules configured for transportation. The arrangement includes a plurality of photovoltaic modules, each photovoltaic module including a frame having at least a top member and a bottom member. A plurality of alignment features are included on the top member of each frame, and a plurality of alignment features are included on the bottom member of each frame. Adjacent photovoltaic modules are interlocked by the alignment features on the top member of a lower module fitting together with the alignment features on the bottom member of an upper module. Other embodiments, features and aspects are also disclosed.

  4. Temperature compensated photovoltaic array

    DOE Patents [OSTI]

    Mosher, D.M.

    1997-11-18

    A temperature compensated photovoltaic module comprises a series of solar cells having a thermally activated switch connected in parallel with several of the cells. The photovoltaic module is adapted to charge conventional batteries having a temperature coefficient differing from the temperature coefficient of the module. The calibration temperatures of the switches are chosen whereby the colder the ambient temperature for the module, the more switches that are on and form a closed circuit to short the associated solar cells. By shorting some of the solar cells as the ambient temperature decreases, the battery being charged by the module is not excessively overcharged at lower temperatures. PV module is an integrated solution that is reliable and inexpensive. 2 figs.

  5. Temperature compensated photovoltaic array

    DOE Patents [OSTI]

    Mosher, Dan Michael (Plano, TX)

    1997-11-18

    A temperature compensated photovoltaic module (20) comprised of a series of solar cells (22) having a thermally activated switch (24) connected in parallel with several of the cells (22). The photovoltaic module (20) is adapted to charge conventional batteries having a temperature coefficient (TC) differing from the temperature coefficient (TC) of the module (20). The calibration temperatures of the switches (24) are chosen whereby the colder the ambient temperature for the module (20), the more switches that are on and form a closed circuit to short the associated solar cells (22). By shorting some of the solar cells (22) as the ambient temperature decreases, the battery being charged by the module (20) is not excessively overcharged at lower temperatures. PV module (20) is an integrated solution that is reliable and inexpensive.

  6. The Market Value and Cost of Solar Photovoltaic Electricity Production

    E-Print Network [OSTI]

    Borenstein, Severin

    2008-01-01

    Large Grid- Connected Photovoltaic Systems in California andEconomics of Commercial Photovoltaic Systems in California,”

  7. Photovoltaic-thermal collectors

    DOE Patents [OSTI]

    Cox, III, Charles H. (Carlisle, MA)

    1984-04-24

    A photovoltaic-thermal solar cell including a semiconductor body having antireflective top and bottom surfaces and coated on each said surface with a patterned electrode covering less than 10% of the surface area. A thermal-absorbing surface is spaced apart from the bottom surface of the semiconductor and a heat-exchange fluid is passed between the bottom surface and the heat-absorbing surface.

  8. Sandia Photovoltaics Program

    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:Financing Tool FitsProjectData Dashboard RutlandSTEAB's PrioritiesFuelofPhotovoltaics Program

  9. Photovoltaic self-assembly.

    SciTech Connect (OSTI)

    Lavin, Judith; Kemp, Richard Alan; Stewart, Constantine A.

    2010-10-01

    This late-start LDRD was focused on the application of chemical principles of self-assembly on the ordering and placement of photovoltaic cells in a module. The drive for this chemical-based self-assembly stems from the escalating prices in the 'pick-and-place' technology currently used in the MEMS industries as the size of chips decreases. The chemical self-assembly principles are well-known on a molecular scale in other material science systems but to date had not been applied to the assembly of cells in a photovoltaic array or module. We explored several types of chemical-based self-assembly techniques, including gold-thiol interactions, liquid polymer binding, and hydrophobic-hydrophilic interactions designed to array both Si and GaAs PV chips onto a substrate. Additional research was focused on the modification of PV cells in an effort to gain control over the facial directionality of the cells in a solvent-based environment. Despite being a small footprint research project worked on for only a short time, the technical results and scientific accomplishments were significant and could prove to be enabling technology in the disruptive advancement of the microelectronic photovoltaics industry.

  10. Photovoltaic module reliability workshop

    SciTech Connect (OSTI)

    Mrig, L. (ed.)

    1990-01-01

    The paper and presentations compiled in this volume form the Proceedings of the fourth in a series of Workshops sponsored by Solar Energy Research Institute (SERI/DOE) under the general theme of photovoltaic module reliability during the period 1986--1990. The reliability Photo Voltaic (PV) modules/systems is exceedingly important along with the initial cost and efficiency of modules if the PV technology has to make a major impact in the power generation market, and for it to compete with the conventional electricity producing technologies. The reliability of photovoltaic modules has progressed significantly in the last few years as evidenced by warranties available on commercial modules of as long as 12 years. However, there is still need for substantial research and testing required to improve module field reliability to levels of 30 years or more. Several small groups of researchers are involved in this research, development, and monitoring activity around the world. In the US, PV manufacturers, DOE laboratories, electric utilities and others are engaged in the photovoltaic reliability research and testing. This group of researchers and others interested in this field were brought together under SERI/DOE sponsorship to exchange the technical knowledge and field experience as related to current information in this important field. The papers presented here reflect this effort.

  11. Scattering Properties of nanostructures : applications to photovoltaics

    E-Print Network [OSTI]

    Derkacs, Daniel

    2009-01-01

    Arya, D. Carlson, Prog. Photovoltaics 10, p. 69 (2002). K.and J. Bailat, Prog. in Photovoltaics 12 , 113 (2004). M.and A. Mart?´, Progress in Photovoltaics 9, p. 73 (2001). S.

  12. Photon management in thermal and solar photovoltaics

    E-Print Network [OSTI]

    Hu, Lu

    2008-01-01

    Photovoltaics is a technology that directly converts photon energy into electrical energy. Depending on the photon source, photovoltaic systems can be categorized into two groups: solar photovoltaics (PV) and thermophotovoltaics ...

  13. Monitoring SERC Technologies — Solar Photovoltaics

    Broader source: Energy.gov [DOE]

    A webinar by National Renewable Energy Laboratory's Market Transformation Center electrical engineer Peter McNutt about Solar Photovoltaics and how to properly monitor its installation.

  14. Photovoltaics for Residential Buildings Webinar

    Broader source: Energy.gov [DOE]

    A webinar by National Renewable Energy Laboratory (NREL) Senior Engineer Otto VanGeet on using solar photovoltaic (PV) systems to provide electricity for homes.

  15. Utility-scale photovoltaic concentrators

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The photovoltaics concentrators section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  16. Photoconductivity in Donor-Acceptor Polyferrocenylsilane-Fullerene Composite Films

    E-Print Network [OSTI]

    Sargent, Edward H. "Ted"

    -state photoconductive and photovoltaic devices using thin films of blends of poly(ferrocenylmethylphenylsilane) (PFMPS of the polymer.14 Central to this process was the well-known photoreaction of ferrocene with halocarbons

  17. 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, ...

  18. High-efficiency photovoltaics based on semiconductor nanostructures

    SciTech Connect (OSTI)

    Yu, Paul K.L.; Yu, Edward T.; Wang, Deli

    2011-10-31

    The objective of this project was to exploit a variety of semiconductor nanostructures, specifically semiconductor quantum wells, quantum dots, and nanowires, to achieve high power conversion efficiency in photovoltaic devices. In a thin-film device geometry, the objectives were to design, fabricate, and characterize quantum-well and quantum-dot solar cells in which scattering from metallic and/or dielectric nanostructures was employed to direct incident photons into lateral, optically confined paths within a thin (~1-3um or less) device structure. Fundamental issues concerning nonequilibrium carrier escape from quantum-confined structures, removal of thin-film devices from an epitaxial growth substrate, and coherent light trapping in thin-film photovoltaic devices were investigated. In a nanowire device geometry, the initial objectives were to engineer vertical nanowire arrays to optimize optical confinement within the nanowires, and to extend this approach to core-shell heterostructures to achieve broadspectrum absorption while maintaining high opencircuit voltages. Subsequent work extended this approach to include fabrication of nanowire photovoltaic structures on low-cost substrates.

  19. Southwest Photovoltaic Systems Inc | Open Energy Information

    Open Energy Info (EERE)

    Southwest Photovoltaic Systems Inc Jump to: navigation, search Name: Southwest Photovoltaic Systems Inc Place: Tomball, Texas Zip: 77375 Product: Distributor of small scale PV...

  20. ULTRATHIN FLEXIBLE CRYSTALLINE SILICON: MICROSYSTEMS ENABLED PHOTOVOLTAICS

    E-Print Network [OSTI]

    ULTRATHIN FLEXIBLE CRYSTALLINE SILICON: MICROSYSTEMS ENABLED PHOTOVOLTAICS Jose L. Cruz Photovoltaics (MEPV) is a technique to create solar cells relying on tools from the microsystems and integrated

  1. Organic Photovoltaics Experiments Showcase 'Superfacility' Concept

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

    Organic Photovoltaics Experiments Showcase 'Superfacility' Concept Organic Photovoltaics Experiments Showcase 'Superfacility' Concept Collaboration Key to Enabling On-The-Fly HPC...

  2. MS Exam, Fall 2012, Solid State Electronic Devices (ECE 230A-B) 1. III-V compound semiconductor GaAs has two families of cleavage planes (110) and

    E-Print Network [OSTI]

    Wang, Deli

    MS Exam, Fall 2012, Solid State Electronic Devices (ECE 230A-B) ECE230A: 1. III-V compound of GaAs crystal. 1 #12;MS Exam, Fall 2012, Solid State Electronic Devices (ECE 230A-B) ECE 230B: Assume silicon, room temperature, complete ionization. 1. For an abrupt n+-p diode in Si, the n+ doping is 1020

  3. Ris Energy Report 5 Photovoltaics 6.3.1 Photovoltaics

    E-Print Network [OSTI]

    kREbs, RIsø NATIONAL LAbORATORy, DENMARk The market for photovoltaics (PV, or solar cells) has grown? Crystalline silicon remains the standard PV technology, with a market share that has increased from 85 Photovoltaics 6.3.1 less than half the market. Figure 18 shows that the cost of traditional PV technology has

  4. High-Performance Photovoltaic Project: Identifying Critical Pathways; Kickoff Meeting

    SciTech Connect (OSTI)

    Symko-Davis, M.

    2001-11-07

    The High Performance Photovoltaic Project held a Kickoff Meeting in October, 2001. This booklet contains the presentations given by subcontractors and in-house teams at that meeting. The areas of subcontracted research under the HiPer project include Polycrystalline Thin Films and Multijunction Concentrators. The in-house teams in this initiative will focus on three areas: (1) High-Performance Thin-Film Team-leads the investigation of tandem structures and low-flux concentrators, (2) High-Efficiency Concepts and Concentrators Team-an expansion of an existing team that leads the development of high-flux concentrators, and (3) Thin-Film Process Integration Team-will perform fundamental process and characterization research, to resolve the complex issues of making thin-film multijunction devices.

  5. NREL PV AR&D 11th review meeting, May 13--15, 1992, Denver Marriott City Center, Denver, Colorado. Photovoltaic Advanced Research and Development Project

    SciTech Connect (OSTI)

    Not Available

    1992-06-01

    This is a collection of abstracts from papers presented at the National Renewable Energy Laboratory (NREL) Photovoltaic (PV) research and development review meeting held May 1992. Subject areas covered include solar cell and solar module manufacturing and development, materials, polycrystalline thin films, applications, amorphous silicon, solar cell performance and testing, crystalline silicon and other photovoltaic and safety perspectives. (GHH)

  6. Graphite-based photovoltaic cells

    DOE Patents [OSTI]

    Lagally, Max (Madison, WI); Liu, Feng (Salt Lake City, UT)

    2010-12-28

    The present invention uses lithographically patterned graphite stacks as the basic building elements of an efficient and economical photovoltaic cell. The basic design of the graphite-based photovoltaic cells includes a plurality of spatially separated graphite stacks, each comprising a plurality of vertically stacked, semiconducting graphene sheets (carbon nanoribbons) bridging electrically conductive contacts.

  7. 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.

  8. Photovoltaic panel clamp

    DOE Patents [OSTI]

    Mittan, Margaret Birmingham (Oakland, CA); Miros, Robert H. J. (Fairfax, CA); Brown, Malcolm P. (San Francisco, CA); Stancel, Robert (Loss Altos Hills, CA)

    2012-06-05

    A photovoltaic panel clamp includes an upper and lower section. The interface between the assembled clamp halves and the module edge is filled by a flexible gasket material, such as EPDM rubber. The gasket preferably has small, finger like protrusions that allow for easy insertion onto the module edge while being reversed makes it more difficult to remove them from the module once installed. The clamp includes mounting posts or an integral axle to engage a bracket. The clamp also may include a locking tongue to secure the clamp to a bracket.

  9. Photovoltaic panel clamp

    DOE Patents [OSTI]

    Brown, Malcolm P.; Mittan, Margaret Birmingham; Miros, Robert H. J.; Stancel, Robert

    2013-03-19

    A photovoltaic panel clamp includes an upper and lower section. The interface between the assembled clamp halves and the module edge is filled by a flexible gasket material, such as EPDM rubber. The gasket preferably has small, finger like protrusions that allow for easy insertion onto the module edge while being reversed makes it more difficult to remove them from the module once installed. The clamp includes mounting posts or an integral axle to engage a bracket. The clamp also may include a locking tongue to secure the clamp to a bracket.

  10. Bracket for photovoltaic modules

    DOE Patents [OSTI]

    Ciasulli, John; Jones, Jason

    2014-06-24

    Brackets for photovoltaic ("PV") modules are described. In one embodiment, a saddle bracket has a mounting surface to support one or more PV modules over a tube, a gusset coupled to the mounting surface, and a mounting feature coupled to the gusset to couple to the tube. The gusset can have a first leg and a second leg extending at an angle relative to the mounting surface. Saddle brackets can be coupled to a torque tube at predetermined locations. PV modules can be coupled to the saddle brackets. The mounting feature can be coupled to the first gusset and configured to stand the one or more PV modules off the tube.

  11. Photovoltaic manufacturing technology

    SciTech Connect (OSTI)

    Wohlgemuth, J.H.; Whitehouse, D.; Wiedeman, S.; Catalano, A.W.; Oswald, R. (Solarex Corp., Frederick, MD (United States))

    1991-12-01

    This report identifies steps leading to manufacturing large volumes of low-cost, large-area photovoltaic (PV) modules. Both crystalline silicon and amorphous silicon technologies were studied. Cost reductions for each step were estimated and compared to Solarex Corporation's manufacturing costs. A cost model, a simple version of the SAMICS methodology developed by the Jet Propulsion Laboratory (JPL), projected PV selling prices. Actual costs of materials, labor, product yield, etc., were used in the cost model. The JPL cost model compared potential ways of lowering costs. Solarex identified the most difficult technical challenges that, if overcome, would reduce costs. Preliminary research plans were developed to solve the technical problems. 13 refs.

  12. Photovoltaic Degradation Risk: Preprint

    SciTech Connect (OSTI)

    Jordan, D. C.; Kurtz, S. R.

    2012-04-01

    The ability to accurately predict power delivery over the course of time is of vital importance to the growth of the photovoltaic (PV) industry. Important cost drivers include the efficiency with which sunlight is converted into power, how this relationship changes over time, and the uncertainty in this prediction. An accurate quantification of power decline over time, also known as degradation rate, is essential to all stakeholders - utility companies, integrators, investors, and researchers alike. In this paper we use a statistical approach based on historical data to quantify degradation rates, discern trends and quantify risks related to measurement uncertainties, number of measurements and methodologies.

  13. Photovoltaics | 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 ECoop Inc Jump to:Newberg,Energy LLC JumpPhono Solar Jump to: navigation,asPhotovoltaics

  14. Photovoltaic System Fault Detection

    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| DepartmentPeerFederal FleetUp in thePhotonPhotosPhotovoltaic

  15. Sandia Energy - Photovoltaics

    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 of Fe(II)Geothermal Energy &WaterNewPhotoionization MassPhotovoltaic

  16. Optical Materials, Adhesive and Encapsulant, III-V, and Optical Characterization Evaluation: Cooperative Research and Development Final Report, CRADA Number CRD-07-216

    SciTech Connect (OSTI)

    Kempe, M.

    2012-11-01

    SolFocus is currently developing solar technology for utility scale application using Winston collector based concentrating photovoltaics (CPV). Part of that technology development includes small mirror dishes and front surface reflectors, and bonding the separate parts to the assembly. Mirror panels must meet rigid optical specifications in terms of radius of curvature, slope errors and specularity. The reflective surfaces must demonstrate long term durability and maintain high reflectivity. Some bonded surfaces must maintain adhesion and transparency under high concentrations and high temperatures. Others will experience moderate temperatures and do not require transparency. NREL researchers have developed methods and tools that address these related areas.

  17. NREL Center for Photovoltaics

    ScienceCinema (OSTI)

    None

    2013-05-29

    Solar cells, also called photovoltaics (PV) by solar cell scientists, convert sunlight directly into electricity. Solar cells are often used to power calculators and watches. The performance of a solar cell is measured in terms of its efficiency at turning sunlight into electricity. Only sunlight of certain energies will work efficiently to create electricity, and much of it is reflected or absorbed by the material that make up the cell. Because of this, a typical commercial solar cell has an efficiency of 15%?about one-sixth of the sunlight striking the cell generates electricity. Low efficiencies mean that larger arrays are needed, and that means higher cost. Improving solar cell efficiencies while holding down the cost per cell is an important goal of the PV industry, researchers at the National Renewable Energy Laboratory (NREL) and other U.S. Department of Energy (DOE) laboratories, and they have made significant progress. The first solar cells, built in the 1950s, had efficiencies of less than 4%. For a text version of this video visit http://www.nrel.gov/learning/re_photovoltaics_video_text.html

  18. Photovoltaics information user study

    SciTech Connect (OSTI)

    Belew, W.W.; Wood, B.L.; Marie, T.L.; Reinhardt, C.L.

    1980-10-01

    The results of a series of telephone interviews with groups of users of information on photovoltaics (PV) are described. These results, part of a larger study on many different solar technologies, identify types of information each group needed and the best ways to get information to each group. The report is 1 of 10 discussing study results. The overall study provides baseline data about information needs in the solar community. It covers these technological areas: photovoltaics, passive solar heating and cooling, active solar heating and cooling, biomass energy, solar thermal electric power, solar industrial and agricultural process heat, wind energy, ocean energy, and advanced energy storage. An earlier study identified the information user groups in the solar community and the priority (to accelerate solar energy commercialization) of getting information to each group. In the current study only high-priority groups were examined. Results from seven PV groups respondents are analyzed in this report: DOE-Funded Researchers, Non-DOE-Funded Researchers, Researchers Working for Manufacturers, Representatives of Other Manufacturers, Representatives of Utilities, Electric Power Engineers, and Educators.

  19. Annual Report: Photovoltaic Subcontract Program FY 1990

    SciTech Connect (OSTI)

    Summers, K. A.

    1991-03-01

    This report summarizes the progress of the Photovoltaic (PV) Subcontract Program of the Solar Energy Research Institute (SERI) from October 1, 1989 through September 30, 1990. The PV Subcontract Program is responsible for managing the subcontracted portion of SERI's PV Advanced Research and Development Project. In fiscal year 1990, this included more than 54 subcontracts with a total annualized funding of approximately $11.9 million. Approximately two-thirds of the subcontracts were with universities at a total funding of nearly $3.3 million. The six technical sections of the report cover the main areas of the subcontract program: the Amorphous Silicon Research Project, Polycrystalline Thin Films, Crystalline Silicon Materials Research, High-Efficiency Concepts, the New Ideas Program, and the University Participation Program. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1990, and future research directions. Another section introduces the PVMaT project and reports on its progress.

  20. Process for leveling film surfaces and products thereof

    DOE Patents [OSTI]

    Birkmire, R.W.; McCandless, B.E.

    1990-03-20

    Semiconductor films and photovoltaic devices prepared therefrom are provided wherein the semiconductor films have a specular surface with a texture less than about 0.25 micron greater than the average planar film surface and wherein the semiconductor films are surface modified by exposing the surface to an aqueous solution of bromine containing an acid or salt and continuing such exposure for a time sufficient to etch the surface. 8 figs.

  1. Photovoltaic Product Directory and Buyers Guide

    SciTech Connect (OSTI)

    Watts, R.L.; Smith, S.A.; Dirks, J.A.; Mazzucchi, R.P.; Lee, V.E.

    1984-04-01

    The directory guide explains photovoltaic systems briefly and shows what products are available off-the-shelf. Information is given to assist in designing a photovoltaic system and on financial incentives. Help is given for determining if photovoltaic products can meet a particular buyer's needs, and information is provided on actual photovoltaic user's experiences. Detailed information is appended on various financial incentives available from state and federal governments, sources of additional information on photovoltaics, sources of various photovoltaic products, and a listing of addresses of photovoltaic products suppliers. (LEW)

  2. Photovoltaic module with adhesion promoter

    DOE Patents [OSTI]

    2013-10-08

    Photovoltaic modules with adhesion promoters and methods for fabricating photovoltaic modules with adhesion promoters are described. A photovoltaic module includes a solar cell including a first surface and a second surface, the second surface including a plurality of interspaced back-side contacts. A first glass layer is coupled to the first surface by a first encapsulating layer. A second glass layer is coupled to the second surface by a second encapsulating layer. At least a portion of the second encapsulating layer is bonded directly to the plurality of interspaced back-side contacts by an adhesion promoter.

  3. Fabrication and Characterization of Organic/Inorganic Photovoltaic Devices

    E-Print Network [OSTI]

    Guvenc, Ali Bilge

    2012-01-01

    Third generation photovoltaics: solar cells for 2020 andfor use in organic photovoltaics, Solar Energy Materials andSolar cell efficiency tables (Version 27), Progress in Photovoltaics

  4. Optical Design Considerations for High Conversion Efficiency in Photovoltaics

    E-Print Network [OSTI]

    Ganapati, Vidya

    2015-01-01

    thermophotovoltaics. In solar photovoltaics, radiation fromto the efficiency of solar photovoltaics can have largeof efficiency in solar photovoltaics, and looks at how

  5. Financing Non-Residential Photovoltaic Projects: Options and Implications

    E-Print Network [OSTI]

    Bolinger, Mark

    2009-01-01

    Coggeshall. 2008. Solar Photovoltaic Financing: DeploymentEconomics of Commercial Photovoltaic Systems in California.Financing Non-Residential Photovoltaic Projects: Options and

  6. Statistical Methods for Enhanced Metrology in Semiconductor/Photovoltaic Manufacturing

    E-Print Network [OSTI]

    Zeng, Dekong

    2012-01-01

    and Simulation of Photovoltaic Arrays. ” IEEE Trans. PowerSolar Cell Variability Photovoltaic (PV) cells manufacturedmodeling method for photovoltaic cells. ” in Proc. IEEE 35th

  7. Efficiency enhancement of luminescent solar concentrations for photovoltaic technologies

    E-Print Network [OSTI]

    Wang, Chunhua

    2011-01-01

    and V.U. Ho?mann. Photovoltaic Solar Energy Gen- eration.Concentrations for Photovoltaic Technologies A dissertationThirteenth IEEE Photovoltaic Specialists Conference- 1978—

  8. Statistical Methods for Enhanced Metrology in Semiconductor/Photovoltaic Manufacturing

    E-Print Network [OSTI]

    Zeng, Dekong

    2012-01-01

    modeling method for photovoltaic cells. ” in Proc. IEEE 35thlosses in solar photovoltaic cell networks. ” Energy 32:Modeling of Solar Cell Variability Photovoltaic (PV) cells

  9. The Market Value and Cost of Solar Photovoltaic Electricity Production

    E-Print Network [OSTI]

    Borenstein, Severin

    2008-01-01

    Production of Solar Photovoltaic Cells”, Center for theconcerns is solar photovoltaic cells (PVs), which captureProduction of Solar Photovoltaic Cells Solar PV cells

  10. Fabrication and Characterization of Organic/Inorganic Photovoltaic Devices

    E-Print Network [OSTI]

    Guvenc, Ali Bilge

    2012-01-01

    Diodes, Photodiodes, and Photovoltaic Cells, Applied Physicsprocessable polymer photovoltaic cells by self-organizationand their influence on photovoltaic cells, Solar Energy

  11. Efficiency enhancement of luminescent solar concentrations for photovoltaic technologies

    E-Print Network [OSTI]

    Wang, Chunhua

    2011-01-01

    the manufacturing of solar cells and photovoltaic arrays hasfor providing us Photovoltaic cells, lumines- cent materialsthe currently available photovoltaic cells. The property of

  12. Charge transport in hybrid nanorod-polymer composite photovoltaic cells

    E-Print Network [OSTI]

    Huynh, Wendy U.; Dittmer, Janke J.; Teclemariam, Nerayo; Milliron, Delia; Alivisatos, A. Paul; Barnham, Keith W.J.

    2002-01-01

    circuit diagram for a photovoltaic cell under illumination.devices such as photovoltaic cells and light-emitting-Polymer Composite Photovoltaic Cells Wendy U. Huynh ‡ ,

  13. EA-341 Photovoltaic Technologies, LLC | Department of Energy

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

    EA-341 Photovoltaic Technologies, LLC EA-341 Photovoltaic Technologies, LLC Order authorizing Photovoltaic Technologies, LLC to export electric energy to Mexico EA- 341...

  14. Tariffs Can Be Structured to Encourage Photovoltaic Energy

    E-Print Network [OSTI]

    Wiser, Ryan

    2009-01-01

    Be Structured to Encourage Photovoltaic Energy Ryan Wiser,of customer-sited photovoltaic (PV) systems. Though theseEconomics of Commercial Photovoltaic Systems in California,

  15. Effects of solar photovoltaic panels on roof heat transfer

    E-Print Network [OSTI]

    Dominguez, Anthony; Kleissl, Jan; Luvall, Jeffrey C

    2011-01-01

    the energy performance of  photovoltaic roofs, ASHRAE Trans A thermal model for photovoltaic systems, Solar Energy, Effects of Solar Photovoltaic Panels on Roof Heat Transfer 

  16. Fabrication and Characterization of Organic/Inorganic Photovoltaic Devices

    E-Print Network [OSTI]

    Guvenc, Ali Bilge

    2012-01-01

    J. W. Yu, Organic photovoltaic devices with a crosslinkablein Nanostructured Photovoltaic Devices, Recent Patents oninterfaces in organic photovoltaic devices, Solar Energy

  17. Electronic structure and photovoltaic application of BiI3

    E-Print Network [OSTI]

    2015-01-01

    Electronic structure and photovoltaic application of BiI 3Electronic structure and photovoltaic application of BiI 3recent improvement in photovoltaic efficiency in hybrid lead

  18. Hybrid solar collector using nonimaging optics and photovoltaic components

    E-Print Network [OSTI]

    2015-01-01

    Evaluation of On-Board Photovoltaic Modules Options forthe Temperature Dependence of Photovoltaic Module ElectricalChow, T. T. , "A review on photovoltaic/thermal hybrid solar

  19. Efficient yet Accurate Models for Photovoltaic Modules with Shading Effects

    E-Print Network [OSTI]

    Tu, Tianheng

    2014-01-01

    Jiang, “Partial shading modeling of photovoltaic system withModels for Photovoltaic Modules with Shading Effects AModels for Photovoltaic Modules with Shading Effects by

  20. Femtosecond laser processing of photovoltaic and transparent materials

    E-Print Network [OSTI]

    Ahn, Sanghoon

    2013-01-01

    at  300  K.  Progress   in  Photovoltaics.  1995;3:189-­?A   review.   Progress   in   Photovoltaics.  2006;14:107-­?efficiency.  Progress  in  Photovoltaics.  2004;12:553-­?

  1. The Development of Semiconducting Materials for Organic Photovoltaics

    E-Print Network [OSTI]

    Douglas, Jessica D.

    2013-01-01

    F. C. ; Norrman, K. Prog. Photovoltaics 2007, 15, 697–712.Processed Organic Photovoltaics that Generate Chargepolymer-based organic photovoltaics (OPVs) have attracted

  2. Comment on "coherence and uncertainty in nanostructured organic photovoltaics"

    E-Print Network [OSTI]

    Mukamel, S

    2013-01-01

    provide new probes for photovoltaics. The develop- ment ofin Nanostructured Organic Photovoltaics. J. Phys. Chem. Lettin Nanostructured Organic Photovoltaics” Shaul Mukamel

  3. Structure-Function Relationships in Semiconducting Polymers for Organic Photovoltaics

    E-Print Network [OSTI]

    Kavulak, David Fredric Joel

    2010-01-01

    properties for organic photovoltaics (OPVs). Space-chargePolymers for Organic Photovoltaics By David Fredric JoelPolymers for Organic Photovoltaics by David Fredric Joel

  4. Nonlinear Predictive Energy Management of Residential Buildings with Photovoltaics & Batteries

    E-Print Network [OSTI]

    Sun, Chao; Sun, Fengchun; Moura, Scott J

    2015-01-01

    of Residential Buildings with Photovoltaics & Batteries Chaobuildings equipped with photovoltaics and bat- teries (RBPB)In these systems the photovoltaics (PVs) operate as a local

  5. Temperature-Dependent Electron Transport in Quantum Dot Photovoltaics

    E-Print Network [OSTI]

    Padilla, Derek

    2013-01-01

    4.4 Photovoltaics in Practice . . . . . . . . . . . . . .milestones. Quantum dot photovoltaics is in the bottom-rightIN QUANTUM DOT PHOTOVOLTAICS A dissertation submitted in

  6. Optical Design Considerations for High Conversion Efficiency in Photovoltaics

    E-Print Network [OSTI]

    Ganapati, Vidya

    2015-01-01

    for light trapping in photovoltaics: the supercell concept”,efficiency tables”, Progress in Photovoltaics: Research andphotovoltaic cells”, Progress in Photovoltaics: Research and

  7. Optically Functional Nanomaterials: Optothermally Responsive Composites and Carbon Nanotube Photovoltaics

    E-Print Network [OSTI]

    Okawa, David

    2010-01-01

    and Carbon Nanotube Photovoltaics by David Christopher OkawaPart II: Carbon Nanotube Photovoltaics Chapter 6:Carbon Nanotube – Polymer Photovoltaics 6.1 Polymer-Nanotube

  8. Soiling losses for solar photovoltaic systems in California

    E-Print Network [OSTI]

    Mejia, Felipe A; Kleissl, Jan

    2013-01-01

    Large Grid-Connected Photovoltaic Systems in California andin design of photovoltaic systems. In: Markvart T. andA thermal model for photovoltaic systems. Solar Energy 2001;

  9. Nonlinear Predictive Energy Management of Residential Buildings with Photovoltaics & Batteries

    E-Print Network [OSTI]

    Sun, Chao; Sun, Fengchun; Moura, Scott J

    2015-01-01

    for grid-connected photovoltaic systems,” IEEE Transactionswith a rooftop photovoltaic (PV) system and second-lifeconnected, photovoltaic- battery storage systems,” Renewable

  10. Quarterly Report: Microchannel-Assisted Nanomaterial Deposition Technology for Photovoltaic Material Production

    SciTech Connect (OSTI)

    Palo, Daniel R.

    2011-04-26

    Quarterly report to ITP for Nanomanufacturing program. Report covers FY11 Q2. The primary objective of this project is to develop a nanomanufacturing process which will reduce the manufacturing energy, environmental discharge, and production cost associated with current nano-scale thin-film photovoltaic (PV) manufacturing approaches. The secondary objective is to use a derivative of this nanomanufacturing process to enable greener, more efficient manufacturing of higher efficiency quantum dot-based photovoltaic cells now under development. The work is to develop and demonstrate a scalable (pilot) microreactor-assisted nanomaterial processing platform for the production, purification, functionalization, and solution deposition of nanomaterials for photovoltaic applications. The high level task duration is shown. Phase I consists of a pilot platform for Gen II PV films along with parallel efforts aimed at Gen III PV quantum dot materials. Status of each task is described.

  11. Photovoltaic solar cell

    DOE Patents [OSTI]

    Nielson, Gregory N.; Gupta, Vipin P.; Okandan, Murat; Watts, Michael R.

    2015-09-08

    A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.

  12. Photovoltaic solar concentrator

    DOE Patents [OSTI]

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

    2012-12-11

    A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.

  13. Photovoltaic module mounting system

    DOE Patents [OSTI]

    Miros, Robert H. J. (Fairfax, CA); Mittan, Margaret Birmingham (Oakland, CA); Seery, Martin N. (San Rafael, CA); Holland, Rodney H. (Novato, CA)

    2012-04-17

    A solar array mounting system having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame. The solar array mounting system includes flexible, pedestal-style feet and structural links connected in a grid formation on the mounting surface. The photovoltaic modules are secured in place via the use of attachment clamps that grip the edge of the typically glass substrate. The panel mounting clamps are then held in place by tilt brackets and/or mid-link brackets that provide fixation for the clamps and align the solar panels at a tilt to the horizontal mounting surface. The tilt brackets are held in place atop the flexible feet and connected link members thus creating a complete mounting structure.

  14. Photovoltaic module mounting system

    SciTech Connect (OSTI)

    Miros, Robert H. J.; Mittan, Margaret Birmingham; Seery, Martin N; Holland, Rodney H

    2012-09-18

    A solar array mounting system having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame. The solar array mounting system includes flexible, pedestal-style feet and structural links connected in a grid formation on the mounting surface. The photovoltaic modules are secured in place via the use of attachment clamps that grip the edge of the typically glass substrate. The panel mounting clamps are then held in place by tilt brackets and/or mid-link brackets that provide fixation for the clamps and align the solar panels at a tilt to the horizontal mounting surface. The tilt brackets are held in place atop the flexible feet and connected link members thus creating a complete mounting structure.

  15. NREL Photovoltaic Program. FY 1994 annual report, October 1, 1993--September 30, 1994

    SciTech Connect (OSTI)

    1995-06-01

    This report summarizes the in-house and subcontracted research and development activities under the National renewable Energy Laboratory (NREL) Photovoltaics (PV) program for fiscal year 1994. Research is organized under the following areas; PV program management; crystalline silicon and advanced devices; thin-film PV technologies; PV manufacturing; PV module and system performance and engineering; and PV applications and markets.

  16. PHYSICAL REVIEW B 89, 235105 (2014) Semiconducting ferroelectric photovoltaics through Zn2+

    E-Print Network [OSTI]

    Rappe, Andrew M.

    2014-01-01

    -term source of clean, renewable energy to replace the traditional energy reliance on fossil fuels [1 route by the bulk photovoltaic effect that could potentially allow power conversion efficiency beyond be realizable by standard solid-state synthesis and thin film growth methods. DOI: 10.1103/PhysRevB.89

  17. Rooftop Photovoltaics Market Penetration Scenarios

    SciTech Connect (OSTI)

    Paidipati, J.; Frantzis, L.; Sawyer, H.; Kurrasch, A.

    2008-02-01

    The goal of this study was to model the market penetration of rooftop photovoltaics (PV) in the United States under a variety of scenarios, on a state-by-state basis, from 2007 to 2015.

  18. SAM Photovoltaic Model Technical Reference

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

    SAM Photovoltaic Model Technical Reference P. Gilman National Renewable Energy Laboratory Technical Report NRELTP-6A20-64102 May 2015 NREL is a national laboratory of the U.S....

  19. Denver International Airport Photovoltaic System

    Broader source: Energy.gov [DOE]

    The Denver International Airport (DIA) features a 2-megawatt (MW) photovoltaic (PV) system. DIA also hosts to a second 1.6-MW system. Denver is a Solar America City.

  20. Reducing recombination in organic photovoltaics

    E-Print Network [OSTI]

    Sussman, Jason M. (Jason Michael)

    2011-01-01

    In this thesis, I consider two methods to improve organic photovoltaic efficiency: energy level cascades and promotion of triplet state excitons. The former relies on a thin layer of material placed between the active ...

  1. Plug-and-Play Photovoltaics

    Broader source: Energy.gov [DOE]

    On December 7, 2012, DOE announced $21 million in funding for the Plug-and-Play Photovoltaics funding opportunity. Part of the SunShot Systems Integration efforts, the following projects were...

  2. OTEC- Residential Photovoltaic Rebate Program

    Broader source: Energy.gov [DOE]

    Customers of Oregon Trail Electric Consumers Cooperative (OTEC) who install photovoltaic systems are eligible for a rebate of $500 for the first kilowatt (kW) of installed capacity per year. ...

  3. Ameren Missouri- Photovoltaic Rebate Program

    Broader source: Energy.gov [DOE]

    Ameren Missouri offers rebates to its customers for the installation of net metered photovoltaic (PV) systems on their properties. The rebate is set at $2.00 per DC watt with a maximum rebate of ...

  4. Photovoltaic array mounting apparatus, systems, and methods

    DOE Patents [OSTI]

    West, Jack Raymond; Atchley, Brian; Hudson, Tyrus Hawkes; Johansen, Emil

    2015-04-14

    A photovoltaic array, including: (a) supports laid out on a surface in rows and columns; (b) photovoltaic modules positioned on top of the supports; and (c) fasteners connecting the photovoltaic modules to the supports, wherein the supports have an upper pedestal surface and a lower pedestal surface such that the photovoltaic modules are positioned at a non-horizontal angle when edges of the photovoltaic modules are positioned on top of the upper and lower pedestal surfaces, and wherein a portion of the fasteners rotate to lock the photovoltaic modules onto the supports.

  5. Tariffs Can Be Structured to Encourage Photovoltaic Energy

    E-Print Network [OSTI]

    Wiser, Ryan

    2009-01-01

    Economics of Commercial Photovoltaic Systems in California,of customer-sited photovoltaic (PV) systems. Though these

  6. Effects of solar photovoltaic panels on roof heat transfer

    E-Print Network [OSTI]

    Dominguez, Anthony; Kleissl, Jan; Luvall, Jeffrey C

    2011-01-01

    thermal model for photovoltaic systems, Solar Energy, Vol.  benefits of rooftop photovoltaic (PV) systems for building 

  7. 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

  8. 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

  9. Photovoltaic manufacturing: Present status, future prospects, and research needs

    SciTech Connect (OSTI)

    Wolden, C.A.; Fthenakis, V.; Kurtin, J.; Baxter, J.; Repins, I.; Shasheen, S.; Torvik, J.; Rocket, A.; Aydil, E.

    2011-03-29

    In May 2010 the United States National Science Foundation sponsored a two-day workshop to review the state-of-the-art and research challenges in photovoltaic (PV) manufacturing. This article summarizes the major conclusions and outcomes from this workshop, which was focused on identifying the science that needs to be done to help accelerate PV manufacturing. A significant portion of the article focuses on assessing the current status of and future opportunities in the major PV manufacturing technologies. These are solar cells based on crystalline silicon (c-Si), thin films of cadmium telluride (CdTe), thin films of copper indium gallium diselenide, and thin films of hydrogenated amorphous and nanocrystalline silicon. Current trends indicate that the cost per watt of c-Si and CdTe solar cells are being reduced to levels beyond the constraints commonly associated with these technologies. With a focus on TW/yr production capacity, the issue of material availability is discussed along with the emerging technologies of dye-sensitized solar cells and organic photovoltaics that are potentially less constrained by elemental abundance. Lastly, recommendations are made for research investment, with an emphasis on those areas that are expected to have cross-cutting impact.

  10. Photovoltaic Incentive Design Handbook

    SciTech Connect (OSTI)

    Hoff, T. E.

    2006-12-01

    Investments in customer-owned grid-connected photovoltaic (PV) energy systems are growing at a steady pace. This is due, in part, to the availability of attractive economic incentives offered by public state agencies and utilities. In the United States, these incentives have largely been upfront lump payments tied to the system capacity rating. While capacity-based ''buydowns'' have stimulated the domestic PV market, they have been criticized for subsidizing systems with potentially poor energy performance. As a result, the industry has been forced to consider alternative incentive structures, particularly ones that pay based on long-term measured performance. The industry, however, lacks consensus in the debate over the tradeoffs between upfront incentive payments versus longer-term payments for energy delivery. This handbook is designed for agencies and utilities that offer or intend to offer incentive programs for customer-owned PV systems. Its purpose is to help select, design, and implement incentive programs that best meet programmatic goals. The handbook begins with a discussion of the various available incentive structures and then provides qualitative and quantitative tools necessary to design the most appropriate incentive structure. It concludes with program administration considerations.

  11. Australian Centre for Advanced Photovoltaics Australia-US Institute for Advanced Photovoltaics

    E-Print Network [OSTI]

    New South Wales, University of

    Australian Centre for Advanced Photovoltaics Australia-US Institute for Advanced Photovoltaics Annual Report 2014 Engineering Photovoltaic and Renewable Energy EngineeringNever Stand Still Stanford University #12;AustralianCentreforAdvancedPhotovoltaics-AnnualReport2014 Table of Contents 1. Director

  12. Amorphous Silicon-Carbon Nanostructure Photovoltaic Devices

    E-Print Network [OSTI]

    Schriver, Maria Christine

    2012-01-01

    way to do better. A photovoltaic cell, or solar cell, is aFor this thesis, I made photovoltaic cells using a Schottkyphotovoltaic processes oc- cur in a Schottky barrier solar cell. . . . . . . . . . . . . . . . . .

  13. Mounting support for a photovoltaic module

    DOE Patents [OSTI]

    Brandt, Gregory Michael; Barsun, Stephan K.; Coleman, Nathaniel T.; Zhou, Yin

    2013-03-26

    A mounting support for a photovoltaic module is described. The mounting support includes a foundation having an integrated wire-way ledge portion. A photovoltaic module support mechanism is coupled with the foundation.

  14. Plug-and-Play Photovoltaics Funding Opportunity

    Office of Energy Efficiency and Renewable Energy (EERE)

    Through the Plug-and-Play Photovoltaics program, DOE will advance the development of a commercial plug-and-play photovoltaic (PV) system, an off-the-shelf product that is fully inclusive with...

  15. Photovoltaic cell efficiency at elevated temperatures

    E-Print Network [OSTI]

    Ray, Katherine Leung

    2010-01-01

    In order to determine what type of photovoltaic solar cell could best be used in a thermoelectric photovoltaic hybrid power generator, we tested the change in efficiency due to higher temperatures of three types of solar ...

  16. Photovoltaic product directory and buyers guide

    SciTech Connect (OSTI)

    Watts, R.L.; Smith, S.A.; Mazzucchi, R.P.

    1981-06-01

    Basic information on photovoltaic conversion technology is provided for those unfamiliar with the field. Various types of photovoltaic products and systems currently available off-the-shelf are described. These include products without batteries, battery chargers, power packages, home electric systems, and partial systems. Procedures are given for designing a photovoltaic system from scratch. A few custom photovoltaic systems are described, and a list is compiled of photovoltaic firms which can provide custom systems. Guidance is offered for deciding whether or not to use photovoltaic products. A variety of installations are described and their performance is appraised by the owners. Information is given on various financial incentives available from state and federal governments. Sources of additional information on photovoltaics are listed. A matrix is provided indicating the sources of various types of photovoltaic products. The addresses of suppliers are listed. (LEW)

  17. Photocurrent extraction efficiency in colloidal quantum dot photovoltaics

    SciTech Connect (OSTI)

    Kemp, K. W.; Wong, C. T. O.; Hoogland, S. H.; Sargent, E. H.

    2013-11-18

    The efficiency of photocurrent extraction was studied directly inside operating Colloidal Quantum Dot (CQD) photovoltaic devices. A model was derived from first principles for a thin film p-n junction with a linearly spatially dependent electric field. Using this model, we were able to clarify the origins of recent improvement in CQD solar cell performance. From current-voltage diode characteristics under 1 sun conditions, we extracted transport lengths ranging from 39 nm to 86 nm for these materials. Characterization of the intensity dependence of photocurrent extraction revealed that the dominant loss mechanism limiting the transport length is trap-mediated recombination.

  18. Interband Cascade Photovoltaic Cells

    SciTech Connect (OSTI)

    Yang, Rui Q.; Santos, Michael B.; Johnson, Matthew B.

    2014-09-24

    In this project, we are performing basic and applied research to systematically investigate our newly proposed interband cascade (IC) photovoltaic (PV) cells [1]. These cells follow from the great success of infrared IC lasers [2-3] that pioneered the use of quantum-engineered IC structures. This quantum-engineered approach will enable PV cells to efficiently convert infrared radiation from the sun or other heat source, to electricity. Such cells will have important applications for more efficient use of solar energy, waste-heat recovery, and power beaming in combination with mid-infrared lasers. The objectives of our investigations are to: achieve extensive understanding of the fundamental aspects of the proposed PV structures, develop the necessary knowledge for making such IC PV cells, and demonstrate prototype working PV cells. This research will focus on IC PV structures and their segments for utilizing infrared radiation with wavelengths from 2 to 5 ?m, a range well suited for emission by heat sources (1,000-2,000 K) that are widely available from combustion systems. The long-term goal of this project is to push PV technology to longer wavelengths, allowing for relatively low-temperature thermal sources. Our investigations address material quality, electrical and optical properties, and their interplay for the different regions of an IC PV structure. The tasks involve: design, modeling and optimization of IC PV structures, molecular beam epitaxial growth of PV structures and relevant segments, material characterization, prototype device fabrication and testing. At the end of this program, we expect to generate new cutting-edge knowledge in the design and understanding of quantum-engineered semiconductor structures, and demonstrate the concepts for IC PV devices with high conversion efficiencies.

  19. Discovery Park Impact Network for Photovoltaic Technology

    E-Print Network [OSTI]

    Holland, Jeffrey

    Discovery Park Impact Network for Photovoltaic Technology NEED Discovery Park provides for Photovoltaic Technology (NPT). The NPT is designed to be a unique venue for industry-directed, university aims to become an international center of gravity for photovoltaic research that connects islands

  20. High Concentrated Photovoltaic (CPV) Masafumi Yamaguchi

    E-Print Network [OSTI]

    Canet, Léonie

    High Concentrated Photovoltaic (CPV) Masafumi Yamaguchi Toyota Technological Institute, Nagoya, 468,, other partners #12;Outline 1. Importance of High Performance, Low Cost and Highly Reliable Photovoltaics on Concentrator Photovoltaics (CPV) ; NG-CPV 4. Future Prospects of PV and Summary #12;1. Importance of High

  1. Mirror-Augmented Photovoltaic Designs and Performance

    E-Print Network [OSTI]

    Rollins, Andrew M.

    Mirror-Augmented Photovoltaic Designs and Performance Wei-Chun Lin, Dave Hollingshead, Kara A-In developing photovoltaic (PV) technology, it is crucial to provide lower cost PV power. One of the useful-tracked) mirror-augmented photovoltaic (MAPV) system. A series of MATLAB calculations were developed to screen

  2. Photovoltaic retinal prosthesis with high pixel density

    E-Print Network [OSTI]

    Palanker, Daniel

    Photovoltaic retinal prosthesis with high pixel density Keith Mathieson1,4 , James Loudin1 to stimulating electrodes via intraocular cables. We present a photovoltaic subretinal prosthesis, in which pixel, demonstrating the possibility of a fully integrated photovoltaic retinal prosthesis with high

  3. ROBOTIC DEVICE FOR CLEANING PHOTOVOLTAIC PANEL ARRAYS

    E-Print Network [OSTI]

    Mavroidis, Constantinos

    1 ROBOTIC DEVICE FOR CLEANING PHOTOVOLTAIC PANEL ARRAYS MARK ANDERSON, ASHTON GRANDY, JEREMY HASTIE. The main method for harnessing solar power is with arrays made up of photovoltaic (PV) panels. Accumulation-based cleaning methods for photovoltaic arrays are costly in time, water and energy usage and lack automation

  4. International photovoltaic products and manufacturers directory, 1995

    SciTech Connect (OSTI)

    Shepperd, L.W.

    1995-11-01

    This international directory of more than 500 photovoltaic-related manufacturers is intended to guide potential users of photovoltaics to sources for systems and their components. Two indexes help the user to locate firms and materials. A glossary describes equipment and terminology commonly used in the photovoltaic industry.

  5. EELE408 Photovoltaics Lecture 23: Summary

    E-Print Network [OSTI]

    Kaiser, Todd J.

    1 EELE408 Photovoltaics Lecture 23: Summary Dr. Todd J. Kaiser tjkaiser@ece.montana.edu Department the circuit delivering power to the load Photovoltaic Effect Voltage Separation of holes and electrons p 5-6% Resistance 14-23% LLNL Energy Chart 6 #12;2 Energy Demand Predictions 7 Photovoltaic Myths 8

  6. EELE408 Photovoltaics Lecture 01: Intro & Safety

    E-Print Network [OSTI]

    Kaiser, Todd J.

    1 EELE408 Photovoltaics Lecture 01: Intro & Safety Dr. Todd J. Kaiser tjkaiser@ece.montana.edu Department of Electrical and Computer Engineering Montana State University - Bozeman EELE408 Photovoltaics & Ventre: Photovoltaic Systems Engineering , 3E · Resources: ­ Green: Solar Cells: Operating Principles

  7. Ryne P. Raffaelle National Center for Photovoltaics

    E-Print Network [OSTI]

    Ryne P. Raffaelle National Center for Photovoltaics National Renewable Energy Laboratory DOING&D Partnerships #12;National Center for Photovoltaics The National Center for Photovoltaics (NCPV) focuses generations to meet their own needs. ­ UN Bruntland Commission Our Focus: Making PV More Sustainable

  8. Low band gap polymers Organic Photovoltaics

    E-Print Network [OSTI]

    Low band gap polymers for Organic Photovoltaics Eva Bundgaard Ph.D. Dissertation Risø National Bundgaard Title: Low band gap polymers for Organic photovoltaics Department: The polymer department Report the area of organic photovoltaics are focusing on low band gap polymers, a type of polymer which absorbs

  9. Rational Design of Zinc Phosphide Heterojunction Photovoltaics

    E-Print Network [OSTI]

    Winfree, Erik

    Rational Design of Zinc Phosphide Heterojunction Photovoltaics Thesis by Jeffrey Paul Bosco would meet me with the same energy and enthusiasm regarding the topic of zinc phosphide photovoltaics to the field of earth-abundant photovoltaics has been indispensable to my work. Greg also made a great mentor

  10. Photovoltaic cell and production thereof

    DOE Patents [OSTI]

    Narayanan, Srinivasamohan (Gaithersburg, MD); Kumar, Bikash (Bangalore, IN)

    2008-07-22

    An efficient photovoltaic cell, and its process of manufacture, is disclosed wherein the back surface p-n junction is removed from a doped substrate having an oppositely doped emitter layer. A front surface and edges and optionally the back surface periphery are masked and a back surface etch is performed. The mask is not removed and acts as an anti-reflective coating, a passivating agent, or both. The photovoltaic cell retains an untextured back surface whether or not the front is textured and the dopant layer on the back surface is removed to enhance the cell efficiency. Optionally, a back surface field is formed.

  11. Aternating current photovoltaic building block

    DOE Patents [OSTI]

    Bower, Ward Issac; Thomas, Michael G.; Ruby, Douglas S.

    2004-06-15

    A modular apparatus for and method of alternating current photovoltaic power generation comprising via a photovoltaic module, generating power in the form of direct current; and converting direct current to alternating current and exporting power via one or more power conversion and transfer units attached to the module, each unit comprising a unitary housing extending a length or width of the module, which housing comprises: contact means for receiving direct current from the module; one or more direct current-to-alternating current inverters; an alternating current bus; and contact means for receiving alternating current from the one or more inverters.

  12. Recycling Of Cis Photovoltaic Waste

    DOE Patents [OSTI]

    Drinkard, Jr., William F. (Charlotte, NC); Long, Mark O. (Charlotte, NC); Goozner; Robert E. (Charlotte, NC)

    1998-07-14

    A method for extracting and reclaiming metals from scrap CIS photovoltaic cells and associated photovoltaic manufacturing waste by leaching the waste with dilute nitric acid, skimming any plastic material from the top of the leaching solution, separating glass substrate from the leachate, electrolyzing the leachate to plate a copper and selenium metal mixture onto a first cathode, replacing the cathode with a second cathode, re-electrolyzing the leachate to plate cadmium onto the second cathode, separating the copper from selenium, and evaporating the depleted leachate to yield a zinc and indium containing solid.

  13. Nanostructured Photovoltaics: - Energy Innovation Portal

    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 map shinesSolar Photovoltaic Solar Photovoltaic Find More Like This Return to Search

  14. 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.

  15. Nanocrystal Photovoltaics: The Case of Cu2S-CdS

    E-Print Network [OSTI]

    Rivest, Jessica Louis Baker

    2011-01-01

    M. A. Third generation photovoltaics: Ultra-high conversionmodern photovoltaic age. … in photovoltaics: research andnanopillar-array photovoltaics on low-cost and flexible

  16. Apparatus and processes for the mass production of photovoltaic modules

    DOE Patents [OSTI]

    Barth, Kurt L. (Ft. Collins, CO); Enzenroth, Robert A. (Fort Collins, CO); Sampath, Walajabad S. (Fort Collins, CO)

    2007-05-22

    An apparatus and processes for large scale inline manufacturing of CdTe photovoltaic modules in which all steps, including rapid substrate heating, deposition of CdS, deposition of CdTe, CdCl.sub.2 treatment, and ohmic contact formation, are performed within a single vacuum boundary at modest vacuum pressures. A p+ ohmic contact region is formed by subliming a metal salt onto the CdTe layer. A back electrode is formed by way of a low cost spray process, and module scribing is performed by means of abrasive blasting or mechanical brushing through a mask. The vacuum process apparatus facilitates selective heating of substrates and films, exposure of substrates and films to vapor with minimal vapor leakage, deposition of thin films onto a substrate, and stripping thin films from a substrate. A substrate transport apparatus permits the movement of substrates into and out of vacuum during the thin film deposition processes, while preventing the collection of coatings on the substrate transport apparatus itself.

  17. Photo-voltaic power generating means and methods

    DOE Patents [OSTI]

    Kroger, Ferdinand A. (Los Angeles, CA); Rod, Robert L. (Marina del Rey, CA); Panicker, Ramachandra M. P. (Camarillo, CA); Knaster, Mark B. (Ambler, PA)

    1984-01-10

    A photo-voltaic power cell based on a photoelectric semiconductor compound and the method of using and making the same. The semiconductor compound in the photo-voltaic power cell of the present invention can be electrolytically formed at a cathode in an electrolytic solution by causing discharge or decomposition of ions or molecules of a non-metallic component with deposition of the non-metallic component on the cathode and simultaneously providing ions of a metal component which discharge and combine with the non-metallic component at the cathode thereby forming the semiconductor compound film material thereon. By stoichiometrically adjusting the amounts of the components, or otherwise by introducing dopants into the desired amounts, an N-type layer can be formed and thereafter a P-type layer can be formed with a junction therebetween. The invention is effective in producing homojunction semiconductor materials and heterojunction semiconductor materials. The present invention also provides a method of using three electrodes in order to form the semiconductor compound material on one of these electrodes. Various examples are given for manufacturing different photo-voltaic cells in accordance with the present invention.

  18. Photo-voltaic power generating means and methods

    DOE Patents [OSTI]

    Kroger, Ferdinand A. (Santa Monica, CA); Rod, Robert L. (Marina del Rey, CA); Panicker, M. P. Ramachandra (Camarillo, CA)

    1983-08-23

    A photo-voltaic power cell based on a photoelectric semiconductor compound and the method of using and making the same. The semiconductor compound in the photo-voltaic power cell of the present invention can be electrolytically formed at a cathode in an electrolytic solution by causing discharge or decomposition of ions or molecules of a non-metallic component with deposition of the non-metallic component on the cathode and simultaneously providing ions of a metal component which discharge and combine with the non-metallic component at the cathode thereby forming the semiconductor compound film material thereon. By stoichiometrically adjusting the amounts of the components, or otherwise by introducing dopants into the desired amounts, an N-type layer can be formed and thereafter a P-type layer can be formed with a junction therebetween. The invention is effective in producing homojunction semiconductor materials and heterojunction semiconductor materials. The present invention also provides a method of using three electrodes in order to form the semiconductor compound material on one of these electrodes. Various examples are given for manufacturing different photo-voltaic cells in accordance with the present invention.

  19. 25 Year Lifetime for Flexible Buildings Integrated Photovoltaics

    SciTech Connect (OSTI)

    Gross, Mark E.

    2010-07-10

    Although preliminary proof-of-principle of the efficacy of barrier materials and processes, first developed by Battelle at PNNL and commercialized by Vitex, has been demonstrated at the laboratory scale, there are several challenges to the practical commercial implementation of these developments in the Buildings Integrated Photovoltaics (BIPV) market. Two important issues that are addressed in this project are identifying a low cost substrate material that can survive in the outside environment (rain, heat, dust, hail, etc.) for 25 years and developing an encapsulation method for the photovoltaic (PV) cells that can meet the required barrier performance without driving the cost of the total barrier package out of range (remaining below $3.00/Wp). Without these solutions, current encapsulation technologies will limit the use of PV for BIPV applications. Flexible, light-weight packaging that can withstand 25 years in the field is required for a totally flexible integrated PV package. The benefit of this research is to make substantial progress in the development of a cost-effective, viable thin film barrier package which will be a critical enabling technology to meet the Solar America Initiative cost and device reliability goals, and to make photovoltaics (PV) more cost-competitive with electricity generated using fossil fuels. Increased PV installations will enable increased US electrical capacity and reduce dependence on imported oil through increased utilization of a widely abundant source of renewable energy (sunlight).

  20. Rapid screening buffer layers in photovoltaics

    DOE Patents [OSTI]

    List, III, Frederick Alyious; Tuncer, Enis

    2014-09-09

    An apparatus and method of testing electrical impedance of a multiplicity of regions of a photovoltaic surface includes providing a multi-tipped impedance sensor with a multiplicity of spaced apart impedance probes separated by an insulating material, wherein each impedance probe includes a first end adapted for contact with a photovoltaic surface and a second end in operable communication with an impedance measuring device. The multi-tipped impedance sensor is used to contact the photovoltaic surface and electrical impedance of the photovoltaic material is measured between individual first ends of the probes to characterize the quality of the photovoltaic surface.

  1. Synthesis of thin films and materials utilizing a gaseous catalyst

    DOE Patents [OSTI]

    Morse, Daniel E; Schwenzer, Birgit; Gomm, John R; Roth, Kristian M; Heiken, Brandon; Brutchey, Richard

    2013-10-29

    A method for the fabrication of nanostructured semiconducting, photoconductive, photovoltaic, optoelectronic and electrical battery thin films and materials at low temperature, with no molecular template and no organic contaminants. High-quality metal oxide semiconductor, photovoltaic and optoelectronic materials can be fabricated with nanometer-scale dimensions and high dopant densities through the use of low-temperature biologically inspired synthesis routes, without the use of any biological or biochemical templates.

  2. Improved photovoltaic cells and electrodes

    DOE Patents [OSTI]

    Skotheim, T.A.

    1983-06-29

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

  3. Electrochemical photovoltaic cells and electrodes

    DOE Patents [OSTI]

    Skotheim, Terje A. (East Patchogue, NY)

    1984-01-01

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

  4. SAM Photovoltaic Model Technical Reference

    SciTech Connect (OSTI)

    Gilman, P.

    2015-05-27

    This manual describes the photovoltaic performance model in the System Advisor Model (SAM). The U.S. Department of Energy’s National Renewable Energy Laboratory maintains and distributes SAM, which is available as a free download from https://sam.nrel.gov. These descriptions are based on SAM 2015.1.30 (SSC 41).

  5. Breakthrough: micro-electronic photovoltaics

    ScienceCinema (OSTI)

    Okandan, Murat; Gupta, Vipin

    2014-06-23

    Sandia developed tiny glitter-sized photovoltaic (PV) cells that could revolutionize solar energy collection. The crystalline silicon micro-PV cells will be cheaper and have greater efficiencies than current PV collectors. Micro-PV cells require relatively little material to form well-controlled, highly efficient devices. Cell fabrication uses common microelectric and micro-electromechanical systems (MEMS) techniques.

  6. Breakthrough: micro-electronic photovoltaics

    SciTech Connect (OSTI)

    Okandan, Murat; Gupta, Vipin

    2012-04-23

    Sandia developed tiny glitter-sized photovoltaic (PV) cells that could revolutionize solar energy collection. The crystalline silicon micro-PV cells will be cheaper and have greater efficiencies than current PV collectors. Micro-PV cells require relatively little material to form well-controlled, highly efficient devices. Cell fabrication uses common microelectric and micro-electromechanical systems (MEMS) techniques.

  7. NREL Photovoltaic Program FY 1993

    SciTech Connect (OSTI)

    Not Available

    1994-08-01

    This report reviews the in-house and subcontracted research and development (R&D) activities under the National Renewable Energy Laboratory (NREL) Photovoltaic (PV) Program from October 1, 1992, through September 30, 1993 (fiscal year [FY] 1993). The NREL PV Program is part of the U.S. Department of Energy`s (DOE`s) National Photovoltaics Program, as described in the DOE Photovoltaics Program Plan, FY 1991 - FY 1995. The FY 1993 budget authority (BA) for carrying out the NREL PV Program was $40.1 million in operating funds and $0.9 million in capital equipment funds. An additional $4.8 million in capital equipment funds were made available for the new Solar Energy Research Facility (SERF) that will house the in-house PV laboratories beginning in FY 1994. Subcontract activities represent a major part of the NREL PV Program, with more than $23.7 million (nearly 59%) of the FY 1993 operating funds going to 70 subcontractors. In FY 1993, DOE assigned certain other PV subcontracting efforts to the DOE Golden Field Office (DOE/GO), and assigned responsibility for their technical support to the NREL PV Program. An example is the PV:BONUS (Building Opportunities in the U.S. for Photovoltaics) Project. These DOE/GO efforts are also reported in this document.

  8. Photovoltaic Subcontract Program, FY 1991. Annual report, [October 1, 1990--September 30, 1991

    SciTech Connect (OSTI)

    Not Available

    1992-03-01

    This report summarizes the fiscal year (FY) 1991 (October 1, 1990, through September 30, 1991) progress of the subcontracted photovoltaic (PV) research and development (R&D) performed under the Photovoltaic Advanced Research and Development Project at the National Renewable Energy Laboratory (NREL) -- formerly the Solar Energy Research Institute (SERI). The mission of the national PV program is to develop PV technology for large-scale generation of economically competitive electric power in the United States. The technical sections of the report cover the main areas of the subcontract program: the Amorphous Silicon Research Project, Polycrystalline Thin Films, Crystalline Silicon Materials Research, High-Efficiency Concepts, the New Ideas Program, the University Participation Program, and the Photovoltaic Manufacturing Technology (PVMaT) project. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1991, and future research directions.

  9. Structural and photovoltaic properties of a-Si (SNc)/c-Si heterojunction fabricated by EBPVD technique

    SciTech Connect (OSTI)

    Demiro?lu, D.; Kazmanli, K.; Urgen, M.; Tatar, B.

    2013-12-16

    In last two decades sculptured thin films are very attractive for researches. Some properties of these thin films, like high porosity correspondingly high large surface area, controlled morphology; bring into prominence on them. Sculptured thin films have wide application areas as electronics, optics, mechanics, magnetic and chemistry. Slanted nano-columnar (SnC) thin films are a type of sculptured thin films. In this investigation SnC thin films were growth on n-type crystalline Si(100) and p-type crystalline Si(111) via ultra-high vacuum electron beam evaporation technique. The structural and morphological properties of the amorphous silicon thin films were investigated by XRD, Raman and FE-SEM analysis. According to the XRD and Raman analysis the structure of thin film was amorphous and FE-SEM analysis indicated slanted nano-columns were formed smoothly. Slanted nano-columns a-Si/c-Si heterojunction were prepared as using a photovoltaic device. In this regard we were researched photovoltaic properties of these heterojunction with current-voltage characterization under dark and illumination conditions. Electrical parameters were determined from the current-voltage characteristic in the dark conditions zero-bias barrier height ?{sub B0}?=?0.83?1.00eV; diode ideality factor ??=?11.71?10.73; series resistance R{sub s}?=?260?31.1 k? and shunt resistance R{sub sh}?=?25.71?63.5 M? SnC a-Si/n-Si and SnC a-Si/p-Si heterojunctions shows a pretty good photovoltaic behavior about 10{sup 3}- 10{sup 4} times. The obtained photovoltaic parameters are such as short circuit current density J{sub sc} 83-40 mA/m{sup 2}, open circuit voltage V{sub oc} 900-831 mV.

  10. Analytical model for the optical functions of amorphous semiconductors from the near-infrared to ultraviolet: Applications in thin film

    E-Print Network [OSTI]

    Deng, Xunming

    -infrared to ultraviolet: Applications in thin film photovoltaics A. S. Ferlauto, G. M. Ferreira, J. M. Pearce, C. R. Wronski, and R. W. Collinsa) Department of Physics, Materials Research Institute, and Center for Thin Film, it has numerous applications in the analysis and simulation of thin film a-Si:H based p-i-n and n

  11. 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

  12. 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

  13. Photovoltaic power generation system free of bypass diodes

    DOE Patents [OSTI]

    Lentine, Anthony L.; Okandan, Murat; Nielson, Gregory N.

    2015-07-28

    A photovoltaic power generation system that includes a solar panel that is free of bypass diodes is described herein. The solar panel includes a plurality of photovoltaic sub-modules, wherein at least two of photovoltaic sub-modules in the plurality of photovoltaic sub-modules are electrically connected in parallel. A photovoltaic sub-module includes a plurality of groups of electrically connected photovoltaic cells, wherein at least two of the groups are electrically connected in series. A photovoltaic group includes a plurality of strings of photovoltaic cells, wherein a string of photovoltaic cells comprises a plurality of photovoltaic cells electrically connected in series. The strings of photovoltaic cells are electrically connected in parallel, and the photovoltaic cells are microsystem-enabled photovoltaic cells.

  14. Scattering Properties of nanostructures : applications to photovoltaics

    E-Print Network [OSTI]

    Derkacs, Daniel

    2009-01-01

    Thin Film Solar Cells..Improved Performance of Thin Film Solar Cells via Scatteringefficient CuS/CdS thin film solar cell developed by the US

  15. High Performance Photovoltaic Project: Identifying Critical Pathways, Phase 1 Review Meeting, 15-16 July 2002, Denver, Colorado (CD-ROM)

    SciTech Connect (OSTI)

    Symko-Davies, M.; Robinson, P.

    2002-12-01

    The High-Performance PV Project, Phase 1 objectives are: Accelerate the development of PV in the 21st century to meet economic and environmental needs, and double sunlight-to-electricity conversion efficiency of cost-competitive PV technologies. Cost-competitive technologies: high-flux concentrators-high-efficiency multijunction cells, single-axis concentrators using thin-film cells; and low-cost multijunction thin films for large-area, monolithically interconnected flat-plate modules. Subcontracts are under way toward project targets; polycrystalline in-house efforts focus on the top cell of a tandem structure; and the III-V multijunction in-house effort focuses on the GaInAsN junction.

  16. High voltage photovoltaic power converter

    DOE Patents [OSTI]

    Haigh, Ronald E. (Arvada, CO); Wojtczuk, Steve (Cambridge, MA); Jacobson, Gerard F. (Livermore, CA); Hagans, Karla G. (Livermore, CA)

    2001-01-01

    An array of independently connected photovoltaic cells on a semi-insulating substrate contains reflective coatings between the cells to enhance efficiency. A uniform, flat top laser beam profile is illuminated upon the array to produce electrical current having high voltage. An essentially wireless system includes a laser energy source being fed through optic fiber and cast upon the photovoltaic cell array to prevent stray electrical signals prior to use of the current from the array. Direct bandgap, single crystal semiconductor materials, such as GaAs, are commonly used in the array. Useful applications of the system include locations where high voltages are provided to confined spaces such as in explosive detonation, accelerators, photo cathodes and medical appliances.

  17. Impact of the organic halide salt on final perovskite composition for photovoltaic applications

    SciTech Connect (OSTI)

    Moore, David T.; Sai, Hiroaki; Wee Tan, Kwan; Estroff, Lara A.; Wiesner, Ulrich

    2014-08-01

    The methylammonium lead halide perovskites have shown significant promise as a low-cost, second generation, photovoltaic material. Despite recent advances, however, there are still a number of fundamental aspects of their formation as well as their physical and electronic behavior that are not well understood. In this letter we explore the mechanism by which these materials crystallize by testing the outcome of each of the reagent halide salts. We find that components of both salts, lead halide and methylammonium halide, are relatively mobile and can be readily exchanged during the crystallization process when the reaction is carried out in solution or in the solid state. We exploit this fact by showing that the perovskite structure is formed even when the lead salt's anion is a non-halide, leading to lower annealing temperature and time requirements for film formation. Studies into these behaviors may ultimately lead to improved processing conditions for photovoltaic films.

  18. US photovoltaic patents: 1991--1993

    SciTech Connect (OSTI)

    Pohle, L

    1995-03-01

    This document contains US patents on terrestrial photovoltaic (PV) power applications, including systems, components, and materials as well as manufacturing and support functions. The patent entries in this document were issued from 1991 to 1993. The entries were located by searching USPA, the database of the US Patent Office. The final search retrieved all patents under the class ``Batteries, Thermoelectric and Photoelectric`` and the subclasses ``Photoelectric,`` ``Testing,`` and ``Applications.`` The search also located patents that contained the words ``photovoltaic(s)`` or ``solar cell(s)`` and their derivatives. After the initial list was compiled, most of the patents on the following subjects were excluded: space photovoltaic technology, use of the photovoltaic effect for detectors, and subjects only peripherally concerned with photovoltaic. Some patents on these three subjects were included when ft appeared that those inventions might be of use in terrestrial PV power technologies.

  19. Do Photovoltaic Energy Systems Effect Residential Selling Prices? Results from a California Statewide Investigation.

    E-Print Network [OSTI]

    Hoen, Ben

    2012-01-01

    PHOTOVOLTAIC ENERGY SYSTEMS AFFECT RESIDENTIAL SELLING PRICES?PHOTOVOLTAIC ENERGY SYSTEMS AFFECT RESIDENTIAL SELLING PRICES?

  20. Understanding Variability and Uncertainty of Photovoltaics for Integration with the Electric Power System

    E-Print Network [OSTI]

    Mills, Andrew

    2010-01-01

    and Uncertainty of Photovoltaics for Integration with themodels and datasets. Photovoltaics fall under the broader

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

    E-Print Network [OSTI]

    Leow, Shin Woei

    2014-01-01

    J. Nozik, “Third Generation Photovoltaics based on Multiple8].Applications in third generation photovoltaics have the

  2. Decentalized solar photovoltaic energy systems

    SciTech Connect (OSTI)

    Krupka, M. C.

    1980-09-01

    Environmental data for decentralized solar photovoltaic systems have been generated in support of the Technology Assessment of Solar Energy Systems program (TASE). Emphasis has been placed upon the selection and use of a model residential photovoltaic system to develop and quantify the necessary data. The model consists of a reference home located in Phoenix, AZ, utilizing a unique solar cell array-roof shingle combination. Silicon solar cells, rated at 13.5% efficiency at 28/sup 0/C and 100 mW/cm/sup 2/ (AMI) insolation are used to generate approx. 10 kW (peak). An all-electric home is considered with lead-acid battery storage, dc-ac inversion and utility backup. The reference home is compared to others in regions of different insolation. Major material requirements, scaled to quad levels of end-use energy include significant quantities of silicon, copper, lead, antimony, sulfuric acid and plastics. Operating residuals generated are negligible with the exception of those from the storage battery due to a short (10-year) lifetime. A brief general discussion of other environmental, health, and safety and resource availability impacts is presented. It is suggested that solar cell materials production and fabrication may have the major environmental impact when comparing all facets of photovoltaic system usage. Fabrication of the various types of solar cell systems involves the need, handling, and transportation of many toxic and hazardous chemicals with attendant health and safety impacts. Increases in production of such materials as lead, antimony, sulfuric acid, copper, plastics, cadmium and gallium will be required should large scale usage of photovoltaic systems be implemented.

  3. Ligitek Photovoltaic | 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 NewTexas:Montezuma, Arizona: EnergyLebanonTexas:Hill,Photovoltaic Jump to: navigation, search

  4. Photovoltaic nanocrystal scintillators hybridized on Si solar cells

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

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

  5. Synthesis and photovoltaic application of coper (I) sulfide nanocrystals

    E-Print Network [OSTI]

    Wu, Yue

    2008-01-01

    polymer hybrid photovoltaic cells. Appl. Phys. Lett. 88,S-CdS heterojunction photovoltaic cells. J. Appl. Phys. 45,photovoltaic devices, such as dye-sensitized solar cells 1-

  6. Photovoltaic Lifetime & Degradation Science Statistical Pathway Development: Acrylic Degradation

    E-Print Network [OSTI]

    Rollins, Andrew M.

    Photovoltaic Lifetime & Degradation Science Statistical Pathway Development: Acrylic Degradation, USA ABSTRACT In order to optimize and extend the life of photovoltaics (PV) modules, scientific photovoltaics. The statisti- cally significant relationships were investigated using lifetime and degradation

  7. Synthesis and photovoltaic application of coper (I) sulfide nanocrystals

    E-Print Network [OSTI]

    Wu, Yue

    2008-01-01

    CdSe quantum dots for photovoltaic devices. Nano Lett. 7,nanocrystal-polymer hybrid photovoltaic cells. Appl. Phys.Gill, W. D. , Bube, R. H. Photovoltaic Properties of Cu 2 S-

  8. EXPERIMENTS with PHOTOVOLTAIC CELLS for high school science students

    E-Print Network [OSTI]

    Oregon, University of

    EXPERIMENTS with PHOTOVOLTAIC CELLS for high school science students By Dick Erickson ­ Pleasant Activity ­ Testing Photovoltaic Cells ..........................5 Expected Observations: ........................................................................................................8 II. LAB ACTIVITY - TESTING PHOTOVOLTAIC CELLS ..................................9 BEFORE YOU START

  9. Solution-processed photovoltaics with advanced characterization and analysis

    E-Print Network [OSTI]

    Duan, Hsin-Sheng

    2014-01-01

    at the 37th IEEE Photovoltaics Specialists Conference (D. B. Mitzi, Prog. Photovoltaics 2011, 20, 6. [23] S. Bag,R. Noufi, IEEE J. Photovoltaics 2012, T. Todorov, J. Tang,

  10. Fall 2013 Course Announcement EEE 598 ADVANCED PHOTOVOLTAICS

    E-Print Network [OSTI]

    Zhang, Junshan

    Fall 2013 Course Announcement EEE 598 ADVANCED PHOTOVOLTAICS Professor Meng Tao (meng a role will photovoltaics play in this new energy infrastructure? There are fundamental bottlenecks for current photovoltaic technologies to become a noticeable source of energy: material availability, energy

  11. Aalborg Universitet Analysis and Modeling of Transformerless Photovoltaic Inverter Systems

    E-Print Network [OSTI]

    Kerekes, Tamas

    Aalborg Universitet Analysis and Modeling of Transformerless Photovoltaic Inverter Systems Kerekes and Modeling of Transformerless Photovoltaic Inverter Systems. Aalborg Universitet: Institut for Energiteknik from vbn.aau.dk on: juli 05, 2015 #12;Analysis and Modeling of Transformerless Photovoltaic Inverter

  12. Degradation Pathway Models for Photovoltaics Module Lifetime Performance

    E-Print Network [OSTI]

    Rollins, Andrew M.

    Degradation Pathway Models for Photovoltaics Module Lifetime Performance Nicholas R. Wheeler, Laura data from Underwriter Labs, featuring measurements taken on 18 identical photovoltaic (PV) modules in modules and their effects on module performance over lifetime. Index Terms--photovoltaics, statistical

  13. 350 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 5, NO. 1, JANUARY 2015 Optimal Dispatch of Residential Photovoltaic

    E-Print Network [OSTI]

    Giannakis, Georgios

    350 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 5, NO. 1, JANUARY 2015 Optimal Dispatch of Residential Photovoltaic Inverters Under Forecasting Uncertainties Emiliano Dall'Anese, Member, IEEE, Sairaj V. Dhople--Efforts to ensure reliable operation of existing low- voltage distribution systems with high photovoltaic (PV

  14. Energizing the Next Generation with Photovoltaics Following the lead of Russian colleagues, photovoltaic (PV)

    E-Print Network [OSTI]

    Oregon, University of

    Energizing the Next Generation with Photovoltaics ABSTRACT Following the lead of Russian colleagues, photovoltaic (PV) lab kits are being built and experiments and curricula are being developed for use of these kits. This Photovoltaic Sci- ence Experiments and Curriculum (PSEC) is being tested in local high

  15. Proceedings of the flat-plate solar array project research forum on photovoltaic metallization systems

    SciTech Connect (OSTI)

    1983-11-15

    A Photovoltaic Metallization Research Forum, under the sponsorship of the Jet Propulsion Laboratory's Flat-Plate Solar Array Project and the US Department of Energy, was held March 16-18, 1983 at Pine Mountain, Georgia. The Forum consisted of five sessions, covering (1) the current status of metallization systems, (2) system design, (3) thick-film metallization, (4) advanced techniques and (5) future metallization challenges. Twenty-three papers were presented.

  16. Multiband semiconductor compositions for photovoltaic devices...

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

    Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual...

  17. Nanocrystal and Molecular Precursors for Photovoltaic Applications...

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

    Nanocrystal and Molecular Precursors for Photovoltaic Applications The objective in this proposal is to identify factors that limit the efficiency of nanocrystal based solar cells...

  18. Multiband semiconductor compositions for photovoltaic devices...

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

    perfectly satisfying the conditions for single-junction photovoltaics with the potential for power conversion efficiencies surpassing 50%. Inventors: Walukiewicz; Wladyslaw...

  19. Renewable Energy Ready Home Solar Photovoltaic Specifications...

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

    Solar Photovoltaic Specification, Checklist and Guide, from the U.S. Environmental Protection Agency. rerhsolarelectricguide.pdf More Documents & Publications Solar Water...

  20. PROJECT PROFILE: Photovoltaic Stakeholder Engagement Initiatives

    Broader source: Energy.gov [DOE]

    This project is focused on independent stakeholder engagement activities conducted by Sandia National Laboratory relating to photovoltaic (PV) outreach at the national and international level.

  1. Hudson Light & Power- Photovoltaic Incentive Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Hudson Light & Power Department, the municipal utility for the Town of Hudson, offers a limited number of solar photovoltaic (PV) rebates for residential, commercial, industrial, and municipal...

  2. Solar photovoltaic reflective trough collection structure

    DOE Patents [OSTI]

    Anderson, Benjamin J.; Sweatt, William C.; Okandan, Murat; Nielson, Gregory N.

    2015-11-19

    A photovoltaic (PV) solar concentration structure having at least two troughs encapsulated in a rectangular parallelepiped optical plastic structure, with the troughs filled with an optical plastic material, the troughs each having a reflective internal surface and approximately parabolic geometry, and the troughs each including photovoltaic cells situated so that light impinging on the optical plastic material will be concentrated onto the photovoltaic cells. Multiple structures can be connected to provide a solar photovoltaic collection system that provides portable, efficient, low-cost electrical power.

  3. Mesa Top Photovoltaic Array (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-07-01

    Fact sheet overview of the Mesa Top Photovoltaic Array project implemented by the Department of Energy Golden Office and National Renewable Energy Laboratory.

  4. Recording of SERC Monitoring Technologies- Solar Photovoltaics

    Broader source: Energy.gov [DOE]

    This document provides a transcript of the of SERC Monitoring Technologies - Solar Photovoltaics webinar, presented on 10/20/2011 by Peter McNutt.

  5. SERC Photovoltaics for Residential Buildings Webinar Transcript

    Broader source: Energy.gov [DOE]

    A presentation sponsored by the U.S. Department of Energy about using solar photovoltaics (PV) systems to provide electricity for homes.

  6. Low Cost Production of InGaN for Next-Generation Photovoltaic Devices

    SciTech Connect (OSTI)

    Nick M. Sbrockey, Shangzhu Sun, Gary S. Tompa,

    2012-07-09

    The goal of this project is to develop a low-cost and low-energy technology for production of photovoltaic devices based on InGaN materials. This project builds on the ongoing development by Structured Materials Industries (SMI), of novel thin film deposition technology for Group III-Nitride materials, which is capable of depositing Group-III nitride materials at significantly lower costs and significantly lower energy usage compared to conventional deposition techniques. During this project, SMI demonstrated deposition of GaN and InGaN films using metalorganic sources, and demonstrated compatibility of the process with standard substrate materials and hardware components.

  7. 1 Film Studies FILM STUDIES

    E-Print Network [OSTI]

    Vertes, Akos

    1 Film Studies FILM STUDIES Housed in the Columbian College of Arts and Sciences, the Film Studies Program covers classical film aesthetics, surveys the history of world cinema and takes an in-depth look at films from America, France, Germany, Japan, Russia and the Hispanic world. UNDERGRADUATE Minor · Minor

  8. FEMP Offers New Training on Photovoltaic Operations and Maintenance...

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

    FEMP Offers New Training on Photovoltaic Operations and Maintenance Best Practices FEMP Offers New Training on Photovoltaic Operations and Maintenance Best Practices November 4,...

  9. EA-1638: Solyndra, Inc. Photovoltaic Manufacturing Facility in...

    Office of Environmental Management (EM)

    8: Solyndra, Inc. Photovoltaic Manufacturing Facility in Fremont, CA EA-1638: Solyndra, Inc. Photovoltaic Manufacturing Facility in Fremont, CA March 2, 2009 EA-1638: Final...

  10. EA-1827: Suniva, Inc.'s ARTisun Photovoltaic Manufacturing Project...

    Office of Environmental Management (EM)

    7: Suniva, Inc.'s ARTisun Photovoltaic Manufacturing Project in Saginaw, MI EA-1827: Suniva, Inc.'s ARTisun Photovoltaic Manufacturing Project in Saginaw, MI February 1, 2010...

  11. Kyungdong Photovoltaic Energy Corp KPE formerly Photon Semiconductor...

    Open Energy Info (EERE)

    Photovoltaic Energy Corp KPE formerly Photon Semiconductor Energy Jump to: navigation, search Name: Kyungdong Photovoltaic Energy Corp (KPE) (formerly Photon Semiconductor &...

  12. Solar Photovoltaic Financing: Deployment on Public Property by...

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

    Solar Photovoltaic Financing: Deployment on Public Property by State and Local Governments Solar Photovoltaic Financing: Deployment on Public Property by State and Local...

  13. Sandia Energy - Sandia and EMCORE: Solar Photovoltaics, Fiber...

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

    EMCORE: Solar Photovoltaics, Fiber Optics, MODE, and Energy Efficiency Home Renewable Energy Energy Partnership Concentrating Solar Power Photovoltaic Research & Capabilities Solar...

  14. Solar Photovoltaic Installation Market Trends | OpenEI Community

    Open Energy Info (EERE)

    Solar Photovoltaic Installation Market Trends Home John55364's picture Submitted by John55364(95) Contributor 14 May, 2015 - 02:24 Global Solar Photovoltaic (PV) Installation...

  15. Agua Caliente, World's Largest Solar Photovoltaic Plant, Helps...

    Office of Environmental Management (EM)

    Agua Caliente, World's Largest Solar Photovoltaic Plant, Helps Advance America's Solar Leadership Agua Caliente, World's Largest Solar Photovoltaic Plant, Helps Advance America's...

  16. Solar Junction Develops World Record Setting Concentrated Photovoltaic...

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

    Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell April 18, 2013 -...

  17. Cost and Potential of Monolithic CIGS Photovoltaic Modules (Presentati...

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

    Cost and Potential of Monolithic CIGS Photovoltaic Modules IEEE Photovoltaic Specialists Conference, New Orleans Kelsey A. W. Horowitz and Michael Woodhouse June 17, 2015 NREL...

  18. NREL: Photovoltaics Research - Photovoltaic Manufacturing R&D Project

    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 NewsInformationJessework usesof EnergyY-12Working withPhotoPhotovoltaic Manufacturing

  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. 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

  1. Variable temperature semiconductor film deposition

    DOE Patents [OSTI]

    Li, X.; Sheldon, P.

    1998-01-27

    A method of depositing a semiconductor material on a substrate is disclosed. The method sequentially comprises (a) providing the semiconductor material in a depositable state such as a vapor for deposition on the substrate; (b) depositing the semiconductor material on the substrate while heating the substrate to a first temperature sufficient to cause the semiconductor material to form a first film layer having a first grain size; (c) continually depositing the semiconductor material on the substrate while cooling the substrate to a second temperature sufficient to cause the semiconductor material to form a second film layer deposited on the first film layer and having a second grain size smaller than the first grain size; and (d) raising the substrate temperature, while either continuing or not continuing to deposit semiconductor material to form a third film layer, to thereby anneal the film layers into a single layer having favorable efficiency characteristics in photovoltaic applications. A preferred semiconductor material is cadmium telluride deposited on a glass/tin oxide substrate already having thereon a film layer of cadmium sulfide.

  2. Solar Photovoltaics development -Status and perspectives

    E-Print Network [OSTI]

    Solar Photovoltaics development - Status and perspectives Jørgen Fenhann Risø National Laboratory for the development of solar photovoltaics, contributing to the Macro Task E1 on production cost for fusion.S. with 53 MWp followed by Japan and EU. Until now off-grid installation have dominated the solar PV market

  3. Photovoltaic Installations at Williams College Ruth Aronoff

    E-Print Network [OSTI]

    Aalberts, Daniel P.

    generation using solar power. Photovoltaic (PV) panel installations are a simple way for the College facilities, it is now evaluating in detail the environmental impact of these actions. In addition to making1 Photovoltaic Installations at Williams College Ruth Aronoff Williams Luce Project SUMMARY

  4. Photovoltaic olar nergy Development on Landfills

    E-Print Network [OSTI]

    of a selfballasting photovoltaic solar racking system will affect a closed landfills dirt cap. The effects areas of remote and Photovoltaic solar panels with a self-ballasting system. Source: www to generate up to 7,000 megawatts of solar energy while avoiding sensitive biological resources. The data

  5. National Center for Photovoltaics at NREL

    ScienceCinema (OSTI)

    VanSant, Kaitlyn; Wilson, Greg; Berry, Joseph; Al-Jassim, Mowafak; Kurtz, Sarah

    2014-06-10

    The National Center for Photovoltaics at the National Renewable Energy Laboratory (NREL) focuses on technology innovations that drive industry growth in U.S. photovoltaic (PV) manufacturing. The NCPV is a central resource for our nation's capabilities in PV research, development, deployment, and outreach.

  6. The Solar Photovoltaics Technology Conflict between

    E-Print Network [OSTI]

    Deutch, John

    A Duel in the Sun The Solar Photovoltaics Technology Conflict between China and the United States A REPORT FOR THE MIT FUTURE OF SOLAR ENERGY STUDY #12;#12;A REPORT FOR THE MIT FUTURE OF SOLAR ENERGY STUDY A Duel in the Sun The Solar Photovoltaics Technology Conflict between China and the United States1 John

  7. The Solar Photovoltaics Technology Conflict between

    E-Print Network [OSTI]

    Deutch, John

    A Duel in the Sun The Solar Photovoltaics Technology Conflict between China and the United States A REPORT FOR THE MIT FUTURE OF SOLAR ENERGY STUDY #12;#12;A REPORT fOR THE MIT fUTURE Of SOLAR ENERGY STUDY A Duel in the Sun The Solar Photovoltaics Technology Conflict between China and the United States1 John

  8. National Center for Photovoltaics at NREL

    SciTech Connect (OSTI)

    VanSant, Kaitlyn; Wilson, Greg; Berry, Joseph; Al-Jassim, Mowafak; Kurtz, Sarah

    2013-11-07

    The National Center for Photovoltaics at the National Renewable Energy Laboratory (NREL) focuses on technology innovations that drive industry growth in U.S. photovoltaic (PV) manufacturing. The NCPV is a central resource for our nation's capabilities in PV research, development, deployment, and outreach.

  9. Integrated Photovoltaics | 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 APPENDIXsource History View NewGuam:on OpeneiAlbanian Centre for EnergyTorcuato DiPhotovoltaics

  10. Systematic approach for simultaneously correcting the band-gap andp-dseparation errors of common cation III-V or II-VI binaries in density functional theory calculations within a local density approximation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Wang, Jianwei; Zhang, Yong; Wang, Lin-Wang

    2015-07-31

    We propose a systematic approach that can empirically correct three major errors typically found in a density functional theory (DFT) calculation within the local density approximation (LDA) simultaneously for a set of common cation binary semiconductors, such as III-V compounds, (Ga or In)X with X = N,P,As,Sb, and II-VI compounds, (Zn or Cd)X, with X = O,S,Se,Te. By correcting (1) the binary band gaps at high-symmetry points , L, X, (2) the separation of p-and d-orbital-derived valence bands, and (3) conduction band effective masses to experimental values and doing so simultaneously for common cation binaries, the resulting DFT-LDA-based quasi-first-principles methodmore »can be used to predict the electronic structure of complex materials involving multiple binaries with comparable accuracy but much less computational cost than a GW level theory. This approach provides an efficient way to evaluate the electronic structures and other material properties of complex systems, much needed for material discovery and design.« less

  11. Photovoltaic Polycrystalline Thin-Film Cell Basics | Department...

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

    cells can usually be manufactured in a large-area process, which can be an automated, continuous production process. Finally, they can be deposited on flexible substrate...

  12. Photovoltaic Polycrystalline Thin-Film Cell Basics | Department of Energy

    Energy Savers [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 DeliciousMathematicsEnergyInterested PartiesBuilding energy codesPhiladelhia Gas WorksAugustthe

  13. Enhanced Thin Film Organic Photovoltaic Devices - Energy Innovation Portal

    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 would like submitKansasCommunities EnergyU.S.Engineering Metal(2) Cu (3) O (10+delta)

  14. Multiferroic oxide thin films and heterostructures

    SciTech Connect (OSTI)

    Lu, Chengliang E-mail: Tao.Wu@kaust.edu.sa; Hu, Weijin; Wu, Tom E-mail: Tao.Wu@kaust.edu.sa; Tian, Yufeng

    2015-06-15

    Multiferroic materials promise a tantalizing perspective of novel applications in next-generation electronic, memory, and energy harvesting technologies, and at the same time they also represent a grand scientific challenge on understanding complex solid state systems with strong correlations between multiple degrees of freedom. In this review, we highlight the opportunities and obstacles in growing multiferroic thin films with chemical and structural integrity and integrating them in functional devices. Besides the magnetoelectric effect, multiferroics exhibit excellent resistant switching and photovoltaic properties, and there are plenty opportunities for them to integrate with other ferromagnetic and superconducting materials. The challenges include, but not limited, defect-related leakage in thin films, weak magnetism, and poor control on interface coupling. Although our focuses are Bi-based perovskites and rare earth manganites, the insights are also applicable to other multiferroic materials. We will also review some examples of multiferroic applications in spintronics, memory, and photovoltaic devices.

  15. Photovoltaics R&D: At the Tipping Point

    SciTech Connect (OSTI)

    Kazmerski, L. L.

    2005-01-01

    '' . . . with robust investments in research and market development, the picture changes dramatically.'' Thus, the realigned U.S. Photovoltaic Industry Roadmap highlights R&D as critical to the tipping point that will make solar photovoltaics (PV) significant in the U.S. energy portfolio--part of a well-designed plan that would bring ''2034 expectations'' to reality by 2020. Technology improvement and introduction depend on key, focused, and pertinent research contributions that range from the most fundamental through the applied. In this paper, we underscore the successes and relevance of our current systems-driven PV R&D programs, which are built on integrated capabilities. These capabilities span atomic-level characterization, nanotechnology, new materials design, interface and device engineering, theoretical guidance and modeling, processing, measurements and analysis, and process integration. This presentation identifies and provides examples of critical research tipping points needed to foster now and near technologies (primarily crystalline silicon and thin films) and to introduce coming generations of solar PV that provide options to push us to the next performance levels (devices with ultra-high efficiencies and with ultra-low cost). The serious importance of science and creativity to U.S. PV technology ownership--and the increased focus to accelerate the time from laboratory discovery to industry adoption--are emphasized at this ''tipping point'' for solar PV.

  16. The Design and Implementation of Solar Power with Photovoltaics

    E-Print Network [OSTI]

    Lavaei, Javad

    The Design and Implementation of Solar Power with Photovoltaics E4511 Power Systems Analysis Final Project Victor Campbell vfc2106 #12;2 Table of Contents 1. Introduction 2. Solar Cells 2.1 Photovoltaic of solar energy is the design of solar, or photovoltaic, cells. Photovoltaic cells are semiconductor

  17. Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems

    E-Print Network [OSTI]

    Pedram, Massoud

    Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems Xue Lin 1 , Yanzhi, yanzhiwa, dizhu, pedram}@usc.edu, 2 naehyuck@elpl.snu.ac.kr ABSTRACT Photovoltaic energy harvesting systems, Performance, Reliability. Keywords Photovoltaic System, Fault Detection, Fault Tolerance, Photovoltaic Panel

  18. EPJ Photovoltaics 2, 20301 (2011) www.epj-pv.org

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2011-01-01

    EPJ Photovoltaics 2, 20301 (2011) www.epj-pv.org DOI: 10.1051/epjpv/2011001 c Owned by the authors, published by EDP Sciences, 2011 EPJ PhotovoltaicsEPJ Photovoltaics Geometrical optimization and electrical online: 1 April 2011 Abstract This article investigates the optimal efficiency of a photovoltaic system

  19. Calcium manganate: A promising candidate as buffer layer for hybrid halide perovskite photovoltaic-thermoelectric systems

    SciTech Connect (OSTI)

    Zhao, Pengjun; Wang, Hongguang; Kong, Wenwen; Xu, Jinbao Wang, Lei; Ren, Wei; Bian, Liang; Chang, Aimin

    2014-11-21

    We have systematically studied the feasibility of CaMnO{sub 3} thin film, an n-type perovskite, to be utilized as the buffer layer for hybrid halide perovskite photovoltaic-thermoelectric device. Locations of the conduction band and the valence band, spontaneous polarization performance, and optical properties were investigated. Results indicate the energy band of CaMnO{sub 3} can match up well with that of CH{sub 3}NH{sub 3}PbI{sub 3} on separating electron-hole pairs. In addition, the consistent polarization angle helps enlarge the open circuit voltage of the composite system. Besides, CaMnO{sub 3} film shows large absorption coefficient and low extinction coefficient under visible irradiation, demonstrating high carrier concentration, which is beneficial to the current density. More importantly, benign thermoelectric properties enable CaMnO{sub 3} film to assimilate phonon vibration from CH{sub 3}NH3PbI{sub 3}. All the above features lead to a bright future of CaMnO{sub 3} film, which can be a promising candidate as a buffer layer for hybrid halide perovskite photovoltaic-thermoelectric systems.

  20. Metallic nanostructures for optoelectronic and photovoltaic applications

    E-Print Network [OSTI]

    Lim, Swee Hoe

    2009-01-01

    be advantageous for thin film solar cells where such non-Illustration of the thin film solar cell structure with theand similar behaviors with thin film solar cells 25 and SOI

  1. Amorphous Silicon-Carbon Nanostructure Photovoltaic Devices

    E-Print Network [OSTI]

    Schriver, Maria Christine

    2012-01-01

    and V. Dutta. Thin-film solar cells: An overview. Progressoptical absorption in thin-film solar cells. Optics Express,oxide with focus on thin film solar cell applications. Thin

  2. 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

  3. Request for Information on Photovoltaic Module Recycling

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy SunShot Initiative requests feedback from industry, academia, research laboratories, government agencies, and other stakeholders on issues related to photovoltaic (PV) module recycling technology. SunShot intends to understand the current state of recycling technology and the areas of research that could lead to impactful recycling technologies to support the developing PV industry. The intent of this request for information is to generate discussion related to planning for the end of life of photovoltaic modules and to create a list of high impact research topics in photovoltaics recycling.

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

    E-Print Network [OSTI]

    Leow, Shin Woei

    2014-01-01

    Organic Solar Concentrators for Photovoltaics,” Science,Polymer Photovoltaics for Solar Energy Conversion,” Adv.solar concentrators for building integrated photovoltaics,”

  5. Photovoltaic performance of ultra-small PbSe quantum dots

    E-Print Network [OSTI]

    Ma, Wanli

    2014-01-01

    Y; Alivisatos, AP, Photovoltaic Devices Employing TernaryPhotovoltaic performance of ultra-small PbSe quantum dotsquantum dot, solar cell, photovoltaic, quantum size effect

  6. An Analysis of the Effects of Photovoltaic Energy Systems on Residential Selling Prices in California.

    E-Print Network [OSTI]

    Cappers, Peter

    2012-01-01

    Effects of Residential Photovoltaic Energy Systems on Homeof homes with existing photovoltaic (PV) energy systems havegrid-connected solar photovoltaic (PV) energy systems were

  7. Solar energy storage through the homogeneous electrocatalytic reduction of carbon dioxide : photoelectrochemical and photovoltaic approaches

    E-Print Network [OSTI]

    Sathrum, Aaron John

    2011-01-01

    electricity from photovoltaic cells to convert CO 2 intoSolar Energy Anode Photovoltaic Cell Cathode PP Mesh SpacerCoupling a Photovoltaic Solar Cell with a Homogeneous

  8. Temperature-Dependent Polarization in Field-Effect Transport and Photovoltaic Measurements of Methylammonium Lead Iodide

    E-Print Network [OSTI]

    2015-01-01

    Two-­?Layer Organic Photovoltaic Cell. Appl Phys Lett 1986,Sensitizers for Photovoltaic Cells. J Am Chem Soc 2009, 131,transistor, capacitor and photovoltaic cell measurements all

  9. Using Self-Assembly to Control Nanoscale Morphology in Semiconducting Polymers for Application in Organic Photovoltaics

    E-Print Network [OSTI]

    Ferreira, Amy Susan

    2015-01-01

    Fullerene Organic Photovoltaic Cells. Nat Commun 2013, 4. (Bulk- Heterojunction Photovoltaic Cells. Appl. Phys. Lett.C60 Heterojunction Photovoltaic Cell. Appl. Phys. Lett.

  10. Valuing the Time-Varying Electricity Production of Solar Photovoltaic Cells

    E-Print Network [OSTI]

    Borenstein, Severin

    2005-01-01

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

  11. A Cradle to Grave Framework for Environmental Assessment of Photovoltaic Systems

    E-Print Network [OSTI]

    Zhang, Teresa; Dornfeld, David

    2010-01-01

    impacts and costs of photovoltaic systems: Current state ofEnergy Payback Time for Photovoltaic Modules,” ProceedingsLife-cycle assessment of photovoltaic modules: Comparison of

  12. Do Photovoltaic Energy Systems Effect Residential Selling Prices? Results from a California Statewide Investigation.

    E-Print Network [OSTI]

    Hoen, Ben

    2012-01-01

    DO PHOTOVOLTAIC ENERGY SYSTEMS AFFECT RESIDENTIAL SELLINGopportunity employer. DO PHOTOVOLTAIC ENERGY SYSTEMS AFFECTin the U.S. have sold with photovoltaic (PV) energy systems

  13. Photovoltaic Devices Employing Ternary PbSxSe1-x Nanocrystals

    E-Print Network [OSTI]

    Alivisatos, A. Paul

    2009-01-01

    Photovoltaic Devices Employing Ternary PbS x Se 1-xalloy nanoparticles. Photovoltaic devices made using ternaryInformation for Efficient Photovoltaic Devices Employing

  14. Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices

    E-Print Network [OSTI]

    Hoen, Ben

    2013-01-01

    Residential Photovoltaic Energy Systems in California: Thethe marginal impacts of photovoltaic (PV) energy systems ons largest market for photovoltaic solar (PV), with nearly

  15. Spectroscopy of Photovoltaic Materials: Charge-Transfer Complexes and Titanium Dioxide

    E-Print Network [OSTI]

    Dillon, Robert

    2013-01-01

    RIVERSIDE Spectroscopy of Photovoltaic Materials: Charge-DISSERTATION Spectroscopy of Photovoltaic Materials: Charge-function of photovoltaic (PV) and photocatalytic (PC)

  16. Solar energy storage through the homogeneous electrocatalytic reduction of carbon dioxide : photoelectrochemical and photovoltaic approaches

    E-Print Network [OSTI]

    Sathrum, Aaron John

    2011-01-01

    Hydrogen Generation using Photovoltaic-Electrolysis Devices.6128-6141. Gratzel, M. Photovoltaic and PhotoelectrochemicalHydrogen Generation Using Photovoltaic?Electrolysis Devices.

  17. The Potential Impact of Increased Renewable Energy Penetrations on Electricity Bill Savings from Residential Photovoltaic Systems

    E-Print Network [OSTI]

    Barbose, Galen

    2013-01-01

    California’s Solar Photovoltaic Subsidies? Center for thefrom Residential Photovoltaic Systems Naïm R. Darghouth,FROM RESIDENTIAL PHOTOVOLTAIC SYSTEMS Naïm R. Darghouth

  18. Temperature-Dependent Polarization in Field-Effect Transport and Photovoltaic Measurements of Methylammonium Lead Iodide

    E-Print Network [OSTI]

    2015-01-01

    High- Performance Photovoltaic Perovskite Layers Fabricatedand Its Relation to Photovoltaic Performance. The Journal ofJ. Giant Switchable Photovoltaic Effect in Organometal

  19. Modeling Variability and Uncertainty of Photovoltaic Generation: A Hidden State Spatial Statistical Approach

    E-Print Network [OSTI]

    Tabone, Michaelangelo D; Callaway, Duncan S

    2015-01-01

    AND UNCERTAINTY OF PHOTOVOLTAIC GENERATION [9] M. Milligan,for grid-connected photovoltaic system based on advancedand uncertainty in solar photovoltaic generation at multiple

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

    E-Print Network [OSTI]

    Leow, Shin Woei

    2014-01-01

    for building integrated photovoltaics,” 2013, vol. 8821, pp.of building integrated photovoltaics,” Sol. Energy, vol. 85,of building-integrated photovoltaics,” Energy, vol. 26, no.