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Encapsulated perovskite in NiO nanotube for topological meta-photonic devices

Description: Data management plan for the grant, "Encapsulated perovskite in NiO nanotube for topological meta-photonic devices." Research studying meta-photonic devices with high absorption and topological photonic devices using encapsulated perovskites in NiO nanotubes. The goal is to achieve high-efficiency solar cells and electrically pumped laser in perovskite/NiO nanotubes patterned in the graded photonic super-crystal. The success of this project will lead to high-efficiency integrated lasers and sol… more
Date: 2021-09-01/2024-08-31
Creator: Cui, Jingbiao & Lin, Yuankun
Partner: UNT College of Science
open access

High-Efficiency CTO/ZTO/CdS/CdTe Polycrystalline Thin-Film Solar Cells: Preprint

Description: Presented at the 2001 NCPV Program Review Meeting: The device performance and reproducibility of CdTe cells can be improved by using a modified CTO/ZTO/CdS/CdTe device structure developed at NREL.
Date: October 1, 2001
Creator: Wu, X.; Dhere, R. G.; Albin, D. S.; Gessert, T. A.; DeHart, C.; Keane, J. C. et al.
Partner: UNT Libraries Government Documents Department
open access

Conversion Tower for Dispatchable Solar Power

Description: Advanced Research Projects Agency-Energy project sheet summarizing general information about the High Energy Advanced Thermal Storage (HEATS) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses new system architecture for a solar-electric conversion tower as part of the "High-Efficiency Solar-Electric Conversion Power Tower" project.
Date: May 25, 2012
Creator: Abengoa Solar, Inc.
Partner: UNT Libraries Government Documents Department

High-Efficiency Solar Cells for Large-Scale Electricity Generation & Design Considerations for the Related Optics

Description: The photovoltaic industry has been growing exponentially at an average rate of about 35%/year since 1979. Recently, multijunction concentrator cell efficiencies have surpassed 40%. Combined with concentrating optics, these can be used for electricity generation.
Date: September 17, 2007
Creator: Kurtz, S.; Olson, J.; Geisz, J.; Friedman, D.; McMahon, W.; Ptak, A. et al.
Partner: UNT Libraries Government Documents Department
open access

Progress in High-Performance PV: Polycrystalline Thin-Film Tandem Cells

Description: The High-Performance Photovoltaic (HiPerf PV) Project was initiated by the U.S. Department of Energy to substantially increase the viability of PV for cost-competitive applications. The goal is that PV will contribute significantly to the U.S. and world energy supply and environmental enhancement in the 21st century. The HiPerf PV Project aims at exploring the ultimate performance limits of existing PV technologies, approximately doubling their sunlight-to-electricity conversion efficiencies du… more
Date: August 1, 2004
Creator: Symko-Davies, M.
Partner: UNT Libraries Government Documents Department
open access

Search for Factors Determining the Photodegradation in High-Efficiency a-Si:H-Based Solar Cells; Annual Technical Progress Report, 16 January 1998-15 January 1999

Description: This report describes studies on glow discharge (GD) and hot-wire a-Si-based samples by the University of North Carolina-Chapel Hill during Phase I. We have characterized H-bonding and its light-induced changes by using infrared (IR) and differential IR (DIR). For the less stable film, there is a simultaneous decrease {approx} 2040 cm{sup -1} and increase {approx} 1880 cm{sup -1}; for the more-stable samples, the DIR near 2000 cm{sup -1} increases upon light-soaking. Nuclear magnetic resonance … more
Date: June 18, 1999
Creator: Han, D.
Partner: UNT Libraries Government Documents Department
open access

Identification of Catalysts and Materials for a High-Energy Density Biochemical Fuel Cell: Cooperative Research and Development Final Report, CRADA Number CRD-09-345

Description: The proposed research attempted to identify novel biochemical catalysts, catalyst support materials, high-efficiency electron transfer agents between catalyst active sites and electrodes, and solid-phase electrolytes in order to maximize the current density of biochemical fuel cells that utilize various alcohols as substrates.
Date: July 1, 2013
Creator: Ghirardi, M. & Svedruzic, D.
Partner: UNT Libraries Government Documents Department
open access

Wafer Bonding and Layer Transfer Processes for High Efficiency Solar Cells

Description: A wafer-bonded four-junction cell design consisting of InGaAs, InGaAsP, GaAs, and Ga0.5In0.5P subcells that could reach one-sun AM0 efficiencies of 35.4% is described. The design relies on wafer-bonding and layer transfer for integration of non-lattice-matched subcells. Wafer bonding and layer transfer processes have shown promise in the fabrication of InP/Si epitaxial templates for growth of the bottom InGaAs and InGaAsP subcells on a Si support substrate. Subsequent wafer bonding and layer tr… more
Date: May 1, 2003
Creator: Zahler, J. M.; Fontcuberta i Morral, A.; Ahn, C. G.; Atwater, H. A.; Wanlass, M. W.; Chu, C. et al.
Partner: UNT Libraries Government Documents Department
open access

Required Materials Properties for High-Efficiency CIGS Modules: Preprint

Description: This paper discusses material properties required for each CIGS device layer so that large-area CIGS modules can achieve efficiencies of >15%, substantially higher than the current state of the art.
Date: July 1, 2009
Creator: Repins, I.; Glynn, S.; Duenow, J.; Coutts, T. J.; Metzger, W. & Contreras, M. A.
Partner: UNT Libraries Government Documents Department
open access

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

Description: This short paper is a summary of our investigations in three major areas: high-efficiency CuInGaSe2 (CIGS) solar cells, junctions made using chemical bath deposited ZnS(O,OH) buffer layers, and solar cells fabricated from thinner absorbers. Significant progress was made in all areas. We describe how our research has contributed to the fundamental understanding and the practical application of CIGS materials to high performance solar cells.
Date: January 1, 2005
Creator: Ramanathan, K.; Bhattacharya, R. N.; Contreras, M. A.; Hasoon, F. S.; Abushama, J. & Noufi, R.
Partner: UNT Libraries Government Documents Department
open access

GaNPAs Solar Cells that Can Be Lattice-Matched to Silicon

Description: III-V semiconductors grown on silicon substrates are very attractive for lower-cost, high-efficiency multijunction solar cells, but lattice-mismatched alloys that result in high dislocation densities have been unable to achieve satisfactory performance. GaNxP1-x-yAsy is a direct-gap III-V alloy that can be grown lattice-matched to Si when y= 4.7x - 0.1. We have proposed the use of lattice-matched GaNPAs on silicon for high-efficiency multijunction solar cells. We have grown GaNxP1-x-yAsy on GaP… more
Date: May 1, 2003
Creator: Geisz, J. F.; Friedman, D. J.; McMahon, W. E.; Ptak, A. J.; Kibbler, A. E.; Olson, J. M. et al.
Partner: UNT Libraries Government Documents Department
open access

Low-Cost High-Pressure Hydrogen Generator

Description: Electrolysis of water, particularly in conjunction with renewable energy sources, is potentially a cost-effective and environmentally friendly method of producing hydrogen at dispersed forecourt sites, such as automotive fueling stations. The primary feedstock for an electrolyzer is electricity, which could be produced by renewable sources such as wind or solar that do not produce carbon dioxide or other greenhouse gas emissions. However, state-of-the-art electrolyzer systems are not economical… more
Date: April 2, 2008
Creator: Cropley, Cecelia C. & Norman, Timothy J.
Partner: UNT Libraries Government Documents Department
open access

Ultrahigh Efficiency Multiband Solar Cells Final Report forDirector's Innovation Initiative Project DII-2005-1221

Description: The unique properties of the semiconductor ZnTeO were explored and developed to make multiband solar cells. Like a multijunction cell, multiband solar cells use different energy gaps to convert the majority of the solar spectrum to electrical current while minimizing losses due to heating. Unlike a multijunction cell, this is accomplished within a single material in a multiband cell. ZnTe{sub 1-x}O{sub x} films with x up to 2% were synthesized and shown to have the requisite unique band structu… more
Date: March 29, 2006
Creator: Ager, Joel W., III; Walukiewicz, W. & Yu, Kin Man
Partner: UNT Libraries Government Documents Department
open access

International Conference on Solar Concentrators for the Generation of Electricity or Hydrogen: Book of Abstracts

Description: The International Conference on Solar Concentrators for the Generation of Electricity or Hydrogen provides an opportunity to learn about current significant research on solar concentrators for generating electricity or hydrogen. The conference will emphasize in-depth technical discussions of recent achievements in technologies that convert concentrated solar radiation to electricity or hydrogen, with primary emphasis on photovoltaic (PV) technologies. Very high-efficiency solar cells--above 37%… more
Date: May 1, 2005
Creator: McConnell, R.; Symko-Davies, M. & Hayden, H.
Partner: UNT Libraries Government Documents Department
open access

High-Efficiency Amorphous Silicon Alloy Based Solar Cells and Modules; Final Technical Progress Report, 30 May 2002--31 May 2005

Description: The principal objective of this R&D program is to expand, enhance, and accelerate knowledge and capabilities for development of high-efficiency hydrogenated amorphous silicon (a-Si:H) and amorphous silicon-germanium alloy (a-SiGe:H) related thin-film multijunction solar cells and modules with low manufacturing cost and high reliability. Our strategy has been to use the spectrum-splitting triple-junction structure, a-Si:H/a-SiGe:H/a-SiGe:H, to improve solar cell and module efficiency, stabil… more
Date: October 1, 2005
Creator: Guha, S. & Yang, J.
Partner: UNT Libraries Government Documents Department
open access

On-Sun Comparison of GaInP2/GaAs Tandem Cells with Top Cell Thickness Varied

Description: This study compares the on-sun performance of a set of GaInP2/GaAs tandem cells with different GaInP2 top-cell thicknesses. Because high-efficiency III-V cells are best suited to concentrating photovoltaic (CPV) applications, the cells were mounted on a two-axis tracker with the incident sunlight collimated to exclude all except the direct beam. Current-voltage (I-V) curves were taken throughout the course of several days, along with measurements of the direct solar spectrum. Our two major conc… more
Date: February 1, 2005
Creator: McMahon, W. E.; Emery, K. E.; Friedman, D. J.; Ottoson, L.; Young, M. S.; Ward, J. S. et al.
Partner: UNT Libraries Government Documents Department
open access

High-Efficiency Thin-Film Cadmium Telluride Photovoltaic Cells; Final Subcontract Report, Final Technical Report, 21 January 1994-31 March 1998

Description: This report describes work performed during the past year by The University of Toledo photovoltaics group. Researchers continued to develop rf sputtering for CdS/CdTe thin-film solar cells and to optimize the post-deposition process steps to match the characteristics of the sputtering process. During the fourth phase of the present contract, we focused on determining factors that limit the efficiency in our ''all-sputtered'' thin-film CdTe solar cells on soda-lime glass. These issues include co… more
Date: December 9, 1998
Creator: Compaan, A. D. & Bohn, R. G.
Partner: UNT Libraries Government Documents Department
open access

Investigation of the Microstructure of Cu(In,Ga)Se2 Thin Films Used in High-Efficiency Devices: Preprint

Description: This conference paper describes the microstructure of Cu(In,Ga)Se2 (CIGS) films, as it transitioned from Cu-rich to In-rich composition, by transmission electron microscopy, and energy-dispersive X-ray spectroscopy. We find that the Cu-rich samples have larger grains than the In-rich samples, and they contain two structurally different forms of the CuxSe secondary phase. These samples also show sub-interfaces about 0.2 ..mu..m below the surface. The In-rich samples were almost void of these sub… more
Date: May 1, 2002
Creator: Noufi, R.; Yan, Y.; Abu-Shama, J.; Jones, K.; Al-Jassim, M.; Keyes, B. et al.
Partner: UNT Libraries Government Documents Department
open access

NCPV FY 1998 Annual Report

Description: This report summarizes the in-house and subcontracted research and development (R and D) activities under the National Center for Photovoltaics (NCPV) from October 1, 1997 through September 30, 1998 (FY 1998). The NCPV is part of the U.S. Department of Energy's (DOE's) National Photovoltaics Program, as described in the DOE National Photovoltaics Program Plan for 1996-2000. The mission of the DOE National Photovoltaics Program is to make PV a significant part of the domestic economy--as an indu… more
Date: July 19, 1999
Creator: McConnell, R. D. & Hansen, A.
Partner: UNT Libraries Government Documents Department
open access

High-Efficiency Triple-Junction Amorphous Silicon Alloy Photovoltaic Technology; Annual Technical Progress Report, 6 March 1998--5 March 1999

Description: This report describes the research performed during Phase I of this three-phase, three-year program. The research program is intended to expand, enhance, and accelerate knowledge and capabilities for developing high-performance, two-terminal multijunction amorphous silicon (a-Si) alloy cells and modules with low manufacturing cost and high reliability. To improve efficiency, United Solar uses a spectral-splitting, triple-junction cell structure. In this configuration, the top cell uses an amorp… more
Date: July 20, 1999
Creator: Guha, S.
Partner: UNT Libraries Government Documents Department
open access

Reducing Plug and Process Loads for a Large Scale, Low Energy Office Building: NREL's Research Support Facility; Preprint

Description: This paper documents the design and operational plug and process load energy efficiency measures needed to allow a large scale office building to reach ultra high efficiency building goals. The appendices of this document contain a wealth of documentation pertaining to plug and process load design in the RSF, including a list of equipment was selected for use.
Date: February 1, 2011
Creator: Lobato, C.; Pless, S.; Sheppy, M. & Torcellini, P.
Partner: UNT Libraries Government Documents Department
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