Degradation mechanisms of InGaP solar cells by irradiation with less than 100 keV electrons

Yasuki Okuno, Shuichi Okuda, Masafumi Akiyoshi, Takashi Oka, Shirou Kawakita, Mitsuru Imaizumi, Hiroaki Kusawake, Kan Hua Lee, Masafumi Yamaguchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

InGaP solar cells with high radiation resistivity are not expected to be degraded by irradiation with less than 100 keV electron-beams. Recently, it was observed that the InGaP solar cells were degraded by irradiation with 60 keV electron-beams. However, a mechanism of this degradation is unclear. In this study, we use deep-level transient spectroscopy (DLTS) to investigate a carrier trap levels in InGaPsolar cells irradiated with less than 100 keV electron- beams. The result of DLTS indicates that non-ionizing energy loss (NIEL) may not explain the degradation caused by low-energy electron beams well. Additionally, we propose displacement threshold energy (Ed) of phosphorus in InGaP by calculating introduction rate of irradiation-induce defect.

Original languageEnglish
Title of host publication2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-5
Number of pages5
ISBN (Electronic)9781509056057
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes
Event44th IEEE Photovoltaic Specialist Conference, PVSC 2017 - Washington, United States
Duration: 2017 Jun 252017 Jun 30

Publication series

Name2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017

Other

Other44th IEEE Photovoltaic Specialist Conference, PVSC 2017
CountryUnited States
CityWashington
Period17/6/2517/6/30

Keywords

  • Deep-level transient spectroscopy
  • Displacement threshold energy
  • Electron irradiation
  • InGaP solar cells
  • Non-ionizing energy loss

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Okuno, Y., Okuda, S., Akiyoshi, M., Oka, T., Kawakita, S., Imaizumi, M., Kusawake, H., Lee, K. H., & Yamaguchi, M. (2017). Degradation mechanisms of InGaP solar cells by irradiation with less than 100 keV electrons. In 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017 (pp. 1-5). (2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2017.8366605