Download or read book Space Radiation Effects in Advanced Solar Cell Materials and Devices written by R. J. Walters and published by . This book was released on 2002 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the physical mechanisms governing the response of III-V based solar cells to particle irradiation is presented. The effect of particle irradiation on single and multijunction solar cells is studied through current vs. voltage, spectral response, and deep level transient spectroscopy measurements. The basic radiation response mechanisms are identified, and their effects on the solar cell electrical performance are described. In particular, a detailed analysis of multijunction In(x)Ga(1-x)P/In(y)Ga(1-y)As/Ge devices is presented. The MJ cell response is found to be more strongly affected by the internal cell structure than by the In content.
Download or read book Handbook of Space radiation Effects on Solar cell Power Systems written by William C. Cooley and published by . This book was released on 1963 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared under contract for NASA by Exotech, Incorporated, Alexandria, Virginia, and reproduced photographically from copy supplied by the contractor.
Download or read book Handbook of Space radiation Effects on Solar cell Power Systems written by William C. Cooley and published by . This book was released on 1963 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report on Space radiation Damage to Electronic Components and Materials written by W. E. Chapin and published by . This book was released on 1963 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Fabrication and Characterization of Solar Cells for High Temperature and High Radiation Space Applications written by Zachary S. Bittner and published by . This book was released on 2012 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this work, novel III-V photovoltaic (PV) materials and device structures are investigated for space applications, specifically for tolerance to thermal effects and ionizing radiation effects. The first focus is on high temperature performance of GaP solar cells and on performance enhancement through the incorporation of InGaP/GaP quantum well structures. Temperature dependent performance of GaP solar cells is modeled and compared to a modeled temperature dependence of GaAs. The temperature model showed that a GaP cell should have a normalized efficiency temperature coefficient of -1.31 *10−3°C−1, while a standard GaAs cell should have a normalized temperature coefficient of -2.23*10−3°C−1, representing a 42% improvement in the temperature stability of efficiency. Both GaP and GaAs solar cells were grown using metal organic vapor phase epitaxy and fabricated into solar cell devices. An assortment of optical and electrical characterization was performed on the solar cells. Finally, GaP solar cell performance was measured in an environment simulating the temperatures and light concentrations seen in sub 1 AU solar orbits, simulating the effects on a solar cell as it approaches the sun. A positive normalized temperature coefficient of 2.78*10−3°C−1 was measured for a GaP solar cell, indicating an increase in performance with increasing temperature. In addition, comparing results of GaP solar cells with and without quantum wells, the device without MQWs had an integrated short circuit current density of 1.85 mA/cm2 while the device containing quantum wells has a short circuit current density of 2.07 mA/cm2 or a 12.4% short circuit current increase over that of the device without quantum wells, showing that quantum wells can be used effectively in increasing the current generation in GaP solar cells. The second focus of this thesis is on the ionizing radiation tolerance of epitaxially lifted off (ELO) InP and InGaAs (lattice-matched to InP) for the purpose of assessing device lifetime in high-radiation Earth orbits. Solar cells are characterized through spectral responsivity as well as illuminated and dark current-voltage (I-V ) measurements before being subjected to exposure to a 5 mCi 210Po alpha source and a 100 mCi 90Sr beta source. Device performance is measured with increasing particle fluences. Previously reported results showed epitaxially grown InP solar cells to generate 76.5% of the beginning-of-life (BOL) maximum power under AM0 at a 1MeV beta fluence of 6*1015 e/cm2. In this study, a degradation to 71.1% unirradiated maximum power was seen at a 1MeV beta fluence of 3.19*1015 e/cm2. This demonstrates that ELO InP cells degrade comparably to bulk InP cells under ionizing radiation. An InGaAs cell was measured under 5.4 M eV alpha radiation and had a 50% BOL performance point at 4.7*109 5.4MeV alpha/cm2. The 50% BOL performance point for an InP cell in the same conditions was 1.9*1010 alpha/cm2, showing similar degradation at 4x the alpha fluence."--Abstract.
Download or read book GaAs Solar Cell Radiation Handbook written by B. E. Anspaugh and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Solar Cells for Satellite Power Systems written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-10 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The multiple natures of today's space missions with regard to operational lifetime, orbital environment, cost and size of spacecraft, to name just a few, present such a broad range of performance requirements to be met by the solar array that no single design can suffice to meet them all. The result is a demand for development of specialized solar cell types that help to optimize overall satellite performance within a specified cost range for any given space mission. Historically, space solar array performance has been optimized for a given mission by tailoring the features of silicon solar cells to account for the orbital environment and average operating conditions expected during the mission. It has become necessary to turn to entirely new photovoltaic materials and device designs to meet the requirements of future missions, both in the near and far term. This paper will outline some of the mission drivers and resulting performance requirements that must be met by advanced solar cells, and provide an overview of some of the advanced cell technologies under development to meet them. The discussion will include high efficiency, radiation hard single junction cells; monolithic and mechanically stacked multiple bandgap cells; and thin film cells. Flood, Dennis J. and Weinberg, Irving Glenn Research Center NASA-TM-106777, E-9229, NAS 1.15:106777 RTOP 233-01-0A...
Download or read book Radiation Effects on the Electronic Properties of Carbon Nanotube Thin Films and Advanced Solar Cells written by Hemali G. Shah and published by . This book was released on 2008 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Solar cells and carbon Nanotube films are exposed to proton and neutron radiation while in low earth orbit, geosynchronous orbit, deep space and upper atmosphere. This type of radiation is capable of causing various types of damage to these devices. The type, energy range and influence of the irradiation will depend on the environment of the space mission. The objective of this study is to evaluate the radiation tolerance of novel solar cell devices and carbon Nanotube films." (vi)
Download or read book High Efficiency Solar Cells written by Xiaodong Wang and published by Springer Science & Business Media. This book was released on 2013-11-01 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the effort to increase the contribution of solar cells (photovoltaics) to our energy mix, this book addresses three main areas: making existing technology cheaper, promoting advanced technologies based on new architectural designs, and developing new materials to serve as light absorbers. Leading scientists throughout the world create a fundamental platform for knowledge sharing that combines the physics, materials, and device architectures of high-efficiency solar cells. While providing a comprehensive introduction to the field, the book highlights directions for further research, and is intended to stimulate readers’ interest in the development of novel materials and technologies for solar energy applications.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 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 Effects of Impurities on Radiation Damage of Silicon Solar Cells written by and published by . This book was released on 1965 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Effects in Advanced Semiconductor Materials and Devices written by Frank Larin and published by . This book was released on 1968 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ldef Solar Cell Radiation Effects Analysis written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-12-31 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the extended time that the Long Duration Exposure Facility (LDEF) mission stayed in space, the solar cells on the satellite experienced greater environments than originally planned. The cells showed an overall degradation in performance that is due to the combined effects of the various space environments. The purpose of this analysis is to calculate the effect of the accumulated radiation on the solar cells, thereby helping Marshall Space Flight Center (MSFC) to unravel the relative power degradation from the different environments. Rives, Carol J. and Azarewicz, Joseph L. and Massengill, Lloyd NASA-CR-192458, NAS 1.26:192458, PHY-93R004 NASA ORDER H-13099-D; RTOP 506-41-11...
Download or read book Research and Technology Program Digest written by United States. National Aeronautics and Space Administration and published by . This book was released on with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sun to the Earth and Beyond written by National Research Council and published by National Academies Press. This book was released on 2003-12-17 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, The Sun to the Earth-and Beyond: Panel Reports, is a compilation of the reports from five National Research Council (NRC) panels convened as part of a survey in solar and space physics for the period 2003-2013. The NRC's Space Studies Board and its Committee on Solar and Space Physics organized the study. Overall direction for the survey was provided by the Solar and Space Physics Survey Committee, whose report, The Sun to the Earth-and Beyond: A Decadal Research Strategy in Solar and Space Physics, was delivered to the study sponsors in prepublication format in August 2002. The final version of that report was published in June 2003. The panel reports provide both a detailed rationale for the survey committee's recommendations and an expansive view of the numerous opportunities that exist for a robust program of exploration in solar and space physics.
Download or read book Solar Energy Update written by and published by . This book was released on 1983 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
