Radiation-Hard and Ultralightweight Polycrystalline Cadmium Telluride Thin-Film Solar Cells for Space Applications
- Radiation-Hard and Ultralightweight Polycrystalline Cadmium Telluride Thin-Film Solar Cells for Space Applications
- 민병권; 황윤정; Gwangseok Yang; Eun Woo Cho; 강윤묵; 김동환; 김지현
- Issue Date
- Energy technology
- VOL 4, NO 11-1468
- Achieving high-specific-power and radiation hardness of solar cells is of great importance to perform tasks and achieve duration in space. Therefore, we investigated the proton irradiation resistance of ultralightweight CdS/CdTe thin film solar cells having high specific power values. High-energy proton beams (15  MeV) with doses ranging from 1×1012 to 1×1015  cm− 2 were used, equivalent to more than 2000 years in low Earth orbit. Although 70  % decrease in cell conversion efficiency was observed after proton irradiation with dose of 1×1015  2, it still maintained the photovoltaic performance. The specific power of the fabricated cell decreased from 358  W  kg− 1 to 109  1 after proton irradiation (dose=1×1015  2), which is still comparable to specific powers of other types of solar cells. Our work indicated that reduction of short circuit current is a major factor of deterioration of the cell performance under the high energy proton irradiation. This work revealed that our lightweight CdS/CdTe solar cells have significant potential for the use in space applications: reduction of launch cost by achieving high specific power and assurance of durability over prolonged space missions.
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