Electrical performance of the InGaP solar cell irradiated with low energy electron beams

Yasuki Okuno, Shuichi Okuda, Takeo Kojima, Takashi Oka, Shirou Kawakita, Mitsuru Imaizumi, Hiroaki Kusawake

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The investigation of the radiation degradation characteristics of InGaP space solar cells is important. In order to understand the mechanism of the degradation by radiation the samples of the InGaP solar cell were irradiated in vacuum and at ambient temperature with electron beams from a Cockcroft-Walton type accelerator at Osaka Prefecture University. The threshold energies for recoil were obtained by theoretical calculation. The energies and the fluences of the electron beams were from 60 to 400 keV and from 3×1014 to 3×1016 cm-2, respectively. The light-current-voltage measurements were performed. The degradation of Isc caused by the defects related to the phosphorus atoms was observed and the degradation was suppressed by irradiation at an energy higher than the threshold energy for recoiling Indium atoms. At an energy of 60 keV, where the recoil does not occur, the Voc was degraded.

Original languageEnglish
Pages (from-to)773-776
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume12
Issue number6
DOIs
Publication statusPublished - 2015 Jun 1

Keywords

  • Cockcroft-Walton type electron accelerator
  • InGaP solar cell
  • Irradiation effect
  • Low energy electron beam
  • NIEL

ASJC Scopus subject areas

  • Condensed Matter Physics

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