Photocarrier localization and recombination dynamics in Cu 2ZnSnS4 single crystals

Le Quang Phuong, Makoto Okano, Yasuhiro Yamada, Akira Nagaoka, Kenji Yoshino, Yoshihiko Kanemitsu

研究成果: Article査読

36 被引用数 (Scopus)

抄録

We have studied the photocarrier localization and recombination dynamics in Cu2ZnSnS4 single crystals at room temperature. The band-gap energy and tail states below the band edge were evaluated by a combination of photoluminescence (PL), PL excitation, photocurrent, and femtosecond transient reflectivity spectroscopy. The photocarriers are rapidly localized to shallow tail states within a typical time constant of several picoseconds to a few tens of picoseconds. The sub-nanosecond PL decay dynamics indicate the importance of multiple carrier trapping processes in the shallow tail states. Therefore, it is concluded that the tail states dominate the optical responses of Cu2ZnSnS4 single crystals.

本文言語English
論文番号191902
ジャーナルApplied Physics Letters
103
19
DOI
出版ステータスPublished - 2013 11月 4
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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