NASA's Photovoltaic Energy Research Plans and Programs

National Aeronautics and Space Administration NASA State-of-the-Art Space Photovoltaics • Major US cell suppliers are SolAero Technologies and Spectrolab Nominally >30% in-space conversion efficiency • Gallium arsenide-based multijunction (3+ junction) solar cell technology Fully space-qualified to AIAA Standards Designed for End-of-Life (EOL) performance (within the space radiation environment) VERY EXPENSIVE (compared to terrestrial solar cells) • More "traditionally terrestrial" photovoltaic technologies are being seeing greater use www.nasa.gov

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