Download or read book Rugged Thin GaAs Solar Cell Development Phase I written by Y. C. Yeh and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the Phase I efforts in developing high efficiency gallium arsenide (GaAs) on germanium (Ge) solar cells, for enhanced survivability and ruggedness over conventional devices. The GaAs/Ge cells will be optimized in Phase II (for high power to weight ratios) and extensively tested in Phase III.
Download or read book Rugged Thin GaAs Solar Cell Development written by Ken Wagner and published by . This book was released on 1988 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the phase II efforts in developing high efficiency GaAs-ON-Ge solar cells for enhanced survivability, ruggedness, and reduced weight over conventional devices. This work emphasizes efforts to improve the cell performance from phase I, initial testing of the cells, and fabrication of a module for space flight testing. The specific goals for the program are: An Air Mass Zero (AM0) conversion efficiency of 18% for beginning-of-life (BOL) at 27 + or - 2 C; An AM0 conversion efficiency of 13.5% at 27 + or - 2 C after exposure to 5 x 10 to the 15th power (MeV) electrons/sq.cm.; A cell weight not to exceed 0.05 grams per square centimeter of cell area. Keywords: Gallium arsenides; Germanium substrates. (AW).
Download or read book Development of High Efficiency GaAs Polycrystal Solar Cells written by and published by . This book was released on 1978-07 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High efficiency thin film GaAs solar cells written by Jet Propulsion Laboratory (U.S.) and published by . This book was released on 1977 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lightweight Light Trapped Thin GaAs Solar Cells for Spacecraft Applications written by Margaret H. Hannon and published by . This book was released on 1995 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: AstroPower has successfully demonstrated the potential performance of high specific power, ultra-thin GaAs solar cells by fabricating and testing ultra-thin, light-trapped, lightweight solar cell prototype devices. The development of lightweight, high performance GaAs solar cells that incorporate light trapping and possess inherent theoretical radiation tolerance is described. The incorporation of light trapping has increased the external quantum efficiency of these solar cells in the long wavelength range. Conversion efficiencies of 17.9% (AMO, 1X) were obtained from a 3 micrometers thick, 1 sq cm solar cell. This results in a specific power of over 1020 W/kg (with a 3-mil cover slide) and a power density of 240 W/sq m. This technology can lead to the deployment of high performance, thin GaAs solar cells. The proposed solar cell design can have a significant impact on the longevity and power generation capabilities of space power supplies. The fabrication techniques developed here for GaAs can be applied to various other solar cell materials and designs including tandem solar cells and high voltage concentrator cells. jg p4.
Download or read book Development of Polycrystal GaAs Solar Cells written by Rockwell International. Electronics Research Center and published by . This book was released on 1979 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Efficiency Floating Junction GaAs Solar Cell for Space Applications Phase 1 written by and published by . This book was released on 1996 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: AstroPower has demonstrated the feasibility of a lightweight, high efficiency GaAs solar cell that will have superior performance characteristics compared to conventional GaAs solar cells in the space environment. The solar cell design consists of a front floating junction that is coupled to a back collecting junction through the injection of minority carriers across a thin base. Performance benefits are enabled by incorporating an all back contact design with the electrostatic bonding technique and the use of multiple active junctions. By using the proper geometrical and electrical considerations, losses associated with grid shading and low energy radiation damage will be minimized. The key results of the Phase I program include demonstration of an 11% efficient (AMO, 1X), 1 sq cm floating junction GaAs solar cell and a 3 micrometers thick GaAs layer electrostatically bonded to high temperature glass capable of surviving process temperatures up to 700 deg C. This ensures stability of the laminate throughout the process sequence and enables numerous potential applications for thin GaAs semiconductor devices. Continuation of process development in Phase II is anticipated to produce, when fully optimized, a radiation resistant solar cell which has been modeled to have an efficiency of 21.9%.
Download or read book Low Cost GaAs Solar Cell Development written by M. J. Ludowise and published by . This book was released on 1983 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: An abbreviated program to design and develop a thin, low-cost GaAs solar cell for space applications is described. Due to funding limitations, the scheduled four-year program was terminated at the two-year point. Several growth runs utilizing the metal organic-chemical vapor phase (MO-CVD) epitaxial process were made in an attempt to optimize the solar cell structure. Both p/n and n/p growths were made with varying emitter thickness and doping levels. Cell thinning for selected cells was successful to less than 10 microns using a special stop-etch technique. These cells were covered prior to thinning to provide strength and reduce the probability of breakage. (Author).
Download or read book Department of Defense Appropriations written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1990 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Thin Film Solar Cells written by I M Dharmadasa and published by CRC Press. This book was released on 2012-09-17 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book concentrates on the latest developments in our understanding of solid-state device physics. The material presented is mainly experimental and based on CdTe thin-film solar cells. It extends these new findings to CIGS thin-film solar cells and presents a new device design based on graded bandgap multilayer solar cells. This design has been experimentally tested using the well-researched GaAs/AlGaAs system and initial devices have shown impressive device parameters. These devices are capable of absorbing all radiation (UV, visible, and infra-red) within the solar spectrum and combines "impact ionization" and "impurity photovoltaic" effects. The improved device understanding presented in this book should impact and guide future device design and low-cost thin-film solar panel manufacture.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-10 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of Defense Appropriations for Fiscal Year 1990 Department of Defense written by United States. Congress. Senate. Committee on Appropriations. Subcommittee on Defense and published by . This book was released on 1989 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of Defense appropriations for fiscal year 1990 written by United States. Congress. Senate. Committee on Appropriations. Subcommittee on Defense and published by . This book was released on 1990 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mantech Project Book 1992 written by and published by DIANE Publishing. This book was released on 1993-06 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a summary of the projects the Air Force MANTECH Directorate has in progress or has completed within the last 10 years. Its purpose is to promote the transfer of technology which was developed through these investments into the defense industrial base.
Download or read book GaAs Solar Cell Development written by A. Caon and published by . This book was released on 1991 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Intersociety Energy Conversion Engineering Conference written by and published by . This book was released on 1989 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
