Accession Number : ADA302263

Title :   Radiation Degradation Modeling of High-Efficiency GaAs/Ge Solar Cells,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA TECHNOLOGY DIV

Personal Author(s) : Kilmer, L. C.

PDF Url : ADA302263

Report Date : 15 JAN 1995

Pagination or Media Count : 14

Abstract : The performance modeling and predictions of the radiation degradation of solar cells is extremely important in designing a power system that will satisfy spacecraft requirements for an entire mission duration. High-efficiency GaAs/Ge solar cells are more efficient and more resistant to space-particle radiation than conventional Si solar cells, but a complete physical performance degradation model has not been developed that accurately predicts the GaAs/Ge solar-cell radiation degradation characteristics. The conventional minority-carrier diffusion length degradation model used to predict the performance of silicon solar cells does not accurately predict the observed GaAs/Ge solar cell performance degradation. A detailed radiation degradation modeling analysis examines why the conventional model does not accurately predict the performance degradation of GaAs/Ge solar cells and offers suggestions for a more accurate radiation degradation model. (AN)

Descriptors :   *SOLAR CELLS, MATHEMATICAL MODELS, LIFE EXPECTANCY(SERVICE LIFE), DEGRADATION, GALLIUM ARSENIDES, ACCURACY, EFFICIENCY, VOLTAGE, CHARGE CARRIERS, MATHEMATICAL PREDICTION, MISSIONS, ARTIFICIAL SATELLITES, POWER SUPPLIES, SPACECRAFT COMPONENTS, DIFFUSION, SOLAR RADIATION, ELECTRON IRRADIATION, GERMANIUM, CURVE FITTING.

Subject Categories : Electric Power Production and Distribution
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE