首页|Radiation tolerance analysis of space solar cells under increased irradiance conditions
Radiation tolerance analysis of space solar cells under increased irradiance conditions
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NETL
NSTL
In this study, we obtained the electrical performance of concentrator photovoltaics (CPV) using InGaP/GaAs/Ge triple-junction solar cells before and after high-energy particle irradiation to examine the effects of solar concentration on radiation tolerance. The conversion efficiency before radiation exposure increased in proportion to the received solar irradiance mainly because of the solar concentration effect of the open-circuit voltage (V_(oc)). Additionally, our experimental results revealed that the solar concentration effect of V_(oc) was enhanced after radiation exposure, which mitigated V_(oc) degradation. To investigate the solar concentration effect on V_(oc) in detail, the recombination current dependencies of the external luminescence efficiency (hext ) of InGaP and GaAs single-junction (1J) cells were measured before and after radiation exposure. It was found that the η_(ext) of InGaP 1J cells after radiation exposure increased with increasing recombination current, which is considered to suppress the degradation of the V_(oc) of the CPV. These findings demonstrate the significant advantages of CPV for space applications.
NETL
NSTL
