Performance degradation prediction for space solar cells under irradiation with low-energy electrons is greatly affected by displacement threshold energy (E d ) when a displacement damage dose (DDD) model is used. According to recent studies, the E d of P atoms is much lower than the conventional E d value in InP-type solar cells irradiated with low-energy electrons. This indicates that the value of E d typically used in DDD model leads to significant error in performance degradation prediction. In this study, degradation of AlInGaP solar cells is observed after irradiation with 60-500 keV electrons. The results suggest that the E d of P atoms in AlInGaP solar cells is much smaller than the conventionally used E d value. By using the DDD model with the E d value obtained in this study (E d = 3.5 eV for P), we demonstrated that the performance degradation predicted by the DDD model agrees well with the experimental results.
ASJC Scopus subject areas
- Physics and Astronomy(all)