Degradation prediction using displacement damage dose method for AlInGaP solar cells by changing displacement threshold energy under irradiation with low-energy electrons

Yasuki Okuno, Yasuki Okuno, Norito Ishikawa, Masafumi Akiyoshi, Hirokazu Ando, Masaki Harumoto, Mitsuru Imaizumi

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number074001
JournalJapanese journal of applied physics
Volume59
Issue number7
DOIs
Publication statusPublished - 2020 Jul 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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