Download or read book Peeled Film GaAs Solar Cells for Space Power written by and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Solar Cells for Satellite Power Systems written by and published by . This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Solar Cells written by K. L. Chopra and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: "You, 0 Sun, are the eye of the world You are the soul of all embodied beings You are the source of all creatures You are the discipline of all engaged in work" - Translated from Mahabharata 3rd Century BC Today, energy is the lifeline and status symbol of "civilized" societies. All nations have therefore embarked upon Research and Development pro grams of varying magnitudes to explore and effectively utilize renewable sources of energy. Albeit a low-grade energy with large temporal and spatial variations, solar energy is abundant, cheap, clean, and renewable, and thus presents a very attractive alternative source. The direct conver sion of solar energy to electricity (photovoltaic effect) via devices called solar cells has already become an established frontier area of science and technology. Born out of necessity for remote area applications, the first commercially manufactured solar cells - single-crystal silicon and thin film CdS/Cu2S - were available well over 20 years ago. Indeed, all space vehicles today are powered by silicon solar cells. But large-scale terrestrial applications of solar cells still await major breakthroughs in terms of discovering new and radical concepts in solar cell device structures, utilizing relatively more abundant, cheap, and even exotic materials, and inventing simpler and less energy intensive fabrication processes. No doubt, this extraordinary challenge in R/D has led to a virtual explosion of activities in the field of photovoltaics in the last several years.
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 Photovoltaics for Space written by Sheila G. Bailey and published by Elsevier. This book was released on 2022-10-26 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: PV has traditionally been used for electric power in space. Solar panels on spacecraft are usually the sole source of power to run the sensors, active heating and cooling, and communications. Photovoltaics for Space: Key Issues, Missions and Alternative Technologies provides an overview of the challenges to efficiently produce solar power in near-Earth space and beyond: the materials and device architectures that have been developed to surmount these environmental and mission-specific barriers. The book is organized in four sections consisting of detailed introductory and background content as well as a collection of in-depth space environment, materials processing, technology, and mission overviews by international experts. This book will detail how to design and optimize a space power system’s performance for power-to-weight ratio, effectiveness at end of operational life (EOL) compared to beginning of operational life (BOL), and specific mission objectives and goals. This book outlines the knowledge required for practitioners and advanced students interested in learning about the background, materials, devices, environmental challenges, missions, and future for photovoltaics for space exploration. Provides an update to state-of-the-art and emerging solar cell technologies Features comprehensive coverage of solar cells for space exploration and materials/device technology options available Explains the extreme conditions and mission challenges to overcome when using photovoltaics in space
Download or read book Utility of Thin Film Solar Cells on Flexible Substrates for Space Power written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-21 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thin-film solar cell program at NASA GRC is developing solar cell technologies for space applications which address two critical metrics: specific power (power per unit mass) and launch stowed volume. To be competitive for many space applications, an array using thin film solar cells must significantly increase specific power while reducing stowed volume when compared to the present baseline technology utilizing crystalline solar cells. The NASA GRC program is developing two approaches. Since the vast majority of the mass of a thin film solar cell is in the substrate, a thin film solar cell on a very lightweight flexible substrate (polymer or metal films) is being developed as the first approach. The second approach is the development of multijunction thin film solar cells. Total cell efficiency can be increased by stacking multiple cells having bandgaps tuned to convert the spectrum passing through the upper cells to the lower cells. Once developed, the two approaches will be merged to yield a multijunction, thin film solar cell on a very lightweight, flexible substrate. The ultimate utility of such solar cells in space require the development of monolithic interconnections, lightweight array structures, and ultra-lightweight support and deployment techniques. Dickman, J. E. and Hepp, A. F. and Morel, D. L. and Ferekides, C. S. and Tuttle, J. R. and Hoffman, D. J. and Dhere, N. G. Glenn Research Center NASA/TM-2004-212554, AIAA Paper 2003-5922, E-14120
Download or read book GaAs Peeled Film Solar Cells Final Report March 15 1980 December 31 1981 written by and published by . This book was released on 1982 with total page 0 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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 996 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 1990 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Organic Based Solar Cells for Space Power written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-27 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in dye-sensitized and organic polymer solar cells have lead NASA to investigate the potential of these devices for space power generation. Dye-sensitized solar cells were exposed to simulated low-earth orbit conditions and their performance evaluated. All cells were characterized under simulated air mass zero (AM0) illumination. Complete cells were exposed to pressures less than 1 x 10(exp -7) torr for over a month, with no sign of sealant failure or electrolyte leakage. Cells from Solaronix SA were rapid thermal cycled under simulated low-earth orbit conditions. The cells were cycled 100 times from -80 C to 80 C, which is equivalent to 6 days in orbit. The best cell had a 4.6 percent loss in efficiency as a result of the thermal cycling. In a separate project, novel -Bridge-Donor-Bridge- Acceptor- (-BDBA-) type conjugated block copolymer systems have been synthesized and characterized by photoluminescence (PL). In comparison to pristine donor or acceptor, the PL emissions of final -B-D-B-A- block copolymer films were quenched over 99 percent. Effective and efficient photo induced electron transfer and charge separation occurs due to the interfaces of micro phase separated donor and acceptor blocks. The system is very promising for a variety high efficiency light harvesting applications. Under an SBIR contract, fullerene-doped polymer-based photovoltaic devices were fabricated and characterized. The best devices showed overall power efficiencies of approx. 0.14 percent under white light. Devices fabricated from 2 percent solids content solutions in chlorobenzene gave the best results. Presently, device lifetimes are too short to be practical for space applications. Bailey, Sheila G. and Harris, Jerry D. and Hepp, Aloysius F. and Anglin, Emily J. and Raffaelle, Ryne P. and Clark, Harry R., Jr. and Gardner, Susan T. P. and Sun, Sam S. Glenn Research Center NASA/TM-2002-211833, NAS 1.15:211833, IECEC-2002-20154, E-13527
Download or read book Thin film Organic based Solar Cells for Space Power written by Sheila G. Bailey and published by . This book was released on 2002 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1991-11 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book GaAs Solar Cell Radiation Handbook written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: History of GaAs solar cell development is provided. Photovoltaic equations are described along with instrumentation techniques for measuring solar cells. Radiation effects in solar cells, electrical performance, and spacecraft flight data for solar cells are discussed. The space radiation environment and solar array degradation calculations are addressed. Anspaugh, B. E. Jet Propulsion Laboratory NASA-CR-203421, NAS 1.26:203421, JPL-Publ-96-9 ...
Download or read book Applied Research Program on High Temperature Radiation Resistant Solar Cell Array written by Radio Corporation of America and published by . This book was released on 1963 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 780 cells was produced with efficiencies of up to 10% and with a mode effeciency of eight percent for the later units. Tests of the cells made at elevated temperatures and in high radiation environments have established the characteristics of the cells. The critical flux for the gallium arsenide cells equalled or exceeded that of silicon cells. Tests of cadmium sulfide cells were not judged sufficiently conclusive to establish the level of critical flux. Soldering techniques were developed and evaluated in terms of the effects upon finished cells. Thermal characteristics of the cells and panels were appraised in terms of orbital evaluation. Panel assembly techniques were developed and evaluated in terms of the electrical and mechanical considerations involved in integrating cells into panels. Investigation and fabrication of single-crystal, thin-film gallium arsenide cells were made. Evaluation of methods for depositing epitaxial films, techniques for producing the desired ''doping'' structure, and studies of the resultant photovoltaic and surface-contacting properties were made for thin-film GaAs. (Author).
Download or read book Multi Junction Thin Film Solar Cells on Flexible Substrates for Space Power written by and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
