57Fe charge states in MC-Si solar cells under light illumination after GeV-implantation of 57Mn

Yutaka Yoshida, Kunifumi Suzuki, Yoshio Kobayashi, Takashi Nagatomo, Yuki Akiyama, Kenichi Yukihira, Kazuo Hayakawa, Hideki Ueno, Akihiro Yoshimi, Daisuke Nagae, Koichiro Asahi, Guido Langouche

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Immediately after the GeV-implantation of 57Mn nuclei produced by the RIKEN-RIBF facility, 57Mn/ 57Fe Mössbauer spectra in Si-solar cells are measured under light illumination. Comparing with the spectrum of p-type multi-crystalline-Si, the broad spectra of the solar cell under operation can be analyzed as a superposition of interstitial and substitutional Fe components with different charge states. The charge states of Fe impurities are created by the excess carrier injection followed by a directional carrier flow in the p-n junction. The present results provide us a possibility to clarify the carrier trapping process at the Fe impurities in Si-solar cells.

Original languageEnglish
Pages (from-to)133-137
Number of pages5
JournalHyperfine Interactions
Volume204
Issue number1-3
DOIs
Publication statusPublished - Mar 1 2012

Keywords

  • Carrier trapping
  • Energy conversion efficiency
  • Fe impurity
  • Mn/ Fe implantation Mössbauer spectroscopy
  • Si solar cell

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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    Yoshida, Y., Suzuki, K., Kobayashi, Y., Nagatomo, T., Akiyama, Y., Yukihira, K., Hayakawa, K., Ueno, H., Yoshimi, A., Nagae, D., Asahi, K., & Langouche, G. (2012). 57Fe charge states in MC-Si solar cells under light illumination after GeV-implantation of 57Mn. Hyperfine Interactions, 204(1-3), 133-137. https://doi.org/10.1007/s10751-011-0424-3