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

doi:10.1007/s10751-011-0424-3

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 journal › Article › peer-review

8 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 language	English
Pages (from-to)	133-137
Number of pages	5
Journal	Hyperfine Interactions
Volume	204
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-011-0424-3
Publication status	Published - Mar 1 2012
Externally published	Yes

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

Access to Document

10.1007/s10751-011-0424-3

Cite this

⁵⁷Fe charge states in MC-Si solar cells under light illumination after GeV-implantation of ⁵⁷Mn. / Yoshida, Yutaka; Suzuki, Kunifumi; Kobayashi, Yoshio; Nagatomo, Takashi; Akiyama, Yuki; Yukihira, Kenichi; Hayakawa, Kazuo; Ueno, Hideki; Yoshimi, Akihiro; Nagae, Daisuke; Asahi, Koichiro; Langouche, Guido.

In: Hyperfine Interactions, Vol. 204, No. 1-3, 01.03.2012, p. 133-137.

Research output: Contribution to journal › Article › peer-review

Yoshida, Yutaka ; Suzuki, Kunifumi ; Kobayashi, Yoshio ; Nagatomo, Takashi ; Akiyama, Yuki ; Yukihira, Kenichi ; Hayakawa, Kazuo ; Ueno, Hideki ; Yoshimi, Akihiro ; Nagae, Daisuke ; Asahi, Koichiro ; Langouche, Guido. / ⁵⁷Fe charge states in MC-Si solar cells under light illumination after GeV-implantation of ⁵⁷Mn. In: Hyperfine Interactions. 2012 ; Vol. 204, No. 1-3. pp. 133-137.

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

abstract = "Immediately after the GeV-implantation of 57Mn nuclei produced by the RIKEN-RIBF facility, 57Mn/ 57Fe M{\"o}ssbauer 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.",

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

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AU - Yoshida, Yutaka

AU - Suzuki, Kunifumi

AU - Kobayashi, Yoshio

AU - Nagatomo, Takashi

AU - Akiyama, Yuki

AU - Yukihira, Kenichi

AU - Hayakawa, Kazuo

AU - Ueno, Hideki

AU - Yoshimi, Akihiro

AU - Nagae, Daisuke

AU - Asahi, Koichiro

AU - Langouche, Guido

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AB - 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.

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KW - Fe impurity

KW - Mn/ Fe implantation Mössbauer spectroscopy

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