Free-carrier dynamics and band tails in C u2ZnSn(Sx S e1-x)4: Evaluation of factors determining solar cell efficiency

Le Quang Phuong, Makoto Okano, Genki Yamashita, Masaya Nagai, Masaaki Ashida, Akira Nagaoka, Kenji Yoshino, Yoshihiko Kanemitsu

研究成果: Article

19 引用 (Scopus)

抄録

We investigated the composition-dependent photocarrier dynamics in Cu2ZnSn(SxSe1-x)4 (CZTSSe) single crystals using various types of steady-state and time-resolved optical spectroscopy. Photoluminescence spectroscopy shows that the band-tail states formed below the band edge decrease monotonically with increasing Se content. THz time-resolved spectroscopy clarifies that an increase in the Se content leads to a shorter lifetime of the free photocarriers. A trade-off between the composition-dependent band-tail density and the free-carrier lifetime occurs in CZTSSe single crystals. Our experimental results provide insights into the physics behind the low and composition-dependent conversion efficiency of CZTSSe-based solar cells.

元の言語English
記事番号115204
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
92
発行部数11
DOI
出版物ステータスPublished - 2015 9 9
外部発表Yes

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Solar cells
solar cells
evaluation
Chemical analysis
Single crystals
spectroscopy
Photoluminescence spectroscopy
Carrier lifetime
single crystals
carrier lifetime
Conversion efficiency
Physics
Spectroscopy
photoluminescence
life (durability)
physics
Optical spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

これを引用

Free-carrier dynamics and band tails in C u2ZnSn(Sx S e1-x)4 : Evaluation of factors determining solar cell efficiency. / Phuong, Le Quang; Okano, Makoto; Yamashita, Genki; Nagai, Masaya; Ashida, Masaaki; Nagaoka, Akira; Yoshino, Kenji; Kanemitsu, Yoshihiko.

:: Physical Review B - Condensed Matter and Materials Physics, 巻 92, 番号 11, 115204, 09.09.2015.

研究成果: Article

Phuong, Le Quang ; Okano, Makoto ; Yamashita, Genki ; Nagai, Masaya ; Ashida, Masaaki ; Nagaoka, Akira ; Yoshino, Kenji ; Kanemitsu, Yoshihiko. / Free-carrier dynamics and band tails in C u2ZnSn(Sx S e1-x)4 : Evaluation of factors determining solar cell efficiency. :: Physical Review B - Condensed Matter and Materials Physics. 2015 ; 巻 92, 番号 11.
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AU - Yoshino, Kenji

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