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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Fabrication of Thin Light trapped GaAs Solar Cells written by Christiana Beatrice Honsberg and published by . This book was released on 1992 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Photovoltaic Research and Technology 1995 written by and published by . This book was released on 1996 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the XIII Space Photovoltaic Research and Technology Conference SPRAT XIII written by and published by . This book was released on 1994 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 13th Space Photovoltaic Research and Technology Conference SPRAT 13 written by and published by . This book was released on 1994 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1990 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Conference Publication written by and published by . This book was released on 1994 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the XII Space Photovoltaic Research and Technology Conference SPRAT XII written by and published by . This book was released on 1993 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1990 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 1470 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 Mid infrared Semiconductor Optoelectronics written by Anthony Krier and published by Springer. This book was released on 2007-05-22 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optoelectronic devices operating in the mid-infrared wavelength range offer applications in a variety of areas from environmental gas monitoring around oil rigs to the detection of narcotics. They could also be used for free-space optical communications, thermal imaging applications and the development of "homeland security" measures. Mid-infrared Semiconductor Optoelectronics is an overview of the current status and technological development in this rapidly emerging area; the basic physics, some of the problems facing the design engineer and a comparison of possible solutions are laid out; the different lasers used as sources for mid-infrared technology are considered; recent work in detectors is reviewed; the last part of the book is concerned with applications. With a world-wide authorship of experts working in many mid-infrared-related fields this book will be an invaluable reference for researchers and graduate students drawn from physics, electronic and electrical engineering and materials science.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1995 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Notices of Changes in Classification Distribution and Availability written by and published by . This book was released on 1997 with total page 232 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:
