Computer Science – Performance
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994sprt.nasa..135j&link_type=abstract
In its Proceedings of the 13th Space Photovoltaic Research and Technology Conference (SPRAT 13) p 135-140 (SEE N95-20502 06-33)
Computer Science
Performance
Electricity, Energy Conversion, Laser Power Beaming, Potential Energy, Power Beaming, Pulsed Lasers, Solar Cells, Sunlight, Free Electron Lasers, Gallium Arsenides, High Power Lasers, Indium Phosphides, Laser Outputs, Lunar Bases, Orbit Transfer Vehicles
Scientific paper
Solar cells have been used to convert sunlight to electrical energy for many years and also offer great potential for non-solar energy conversion applications. Their greatly improved performance under monochromatic light compared to sunlight, makes them suitable as photovoltaic (PV) receivers in laser power beaming applications. Laser beamed power to a PV array receiver could provide power to satellites, an orbital transfer vehicle, or a lunar base. Gallium arsenide (GaAs) and indium phosphide (InP) solar cells have calculated efficiencies of more than 50 percent under continuous illumination at the optimum wavelength. Currently high power free-electron lasers are being developed which operate in pulsed conditions. Understanding cell behavior under a laser pulse is important in the selection of the solar cell material and the laser. An experiment by NAsA lewis and JPL at the AVLIS laser facility in Livermore, CA presented experimental data on cell performance under pulsed laser illumination. Reference 5 contains an overview of technical issues concerning the use of solar cells for laser power conversion, written before the experiments were performed. As the experimental results showed, the actual effects of pulsed operation are more complicated. Reference 6 discusses simulations of the output of GaAs concentrator solar cells under pulsed laser illumination. The present paper continues this work, and compares the output of Si and GaAs solar cells.
Jain Raj K.
Landis Geoffrey A.
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