Temperature-dependent photocarrier recombination dynamics in Cu 2ZnSnS4 single crystals

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

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Time-resolved photoluminescence (PL) measurements have been used to study the temperature-dependent photocarrier recombination dynamics in Cu 2ZnSnS4 (CZTS) single crystals. We found a significant change of nearly four orders of magnitude of the PL decay time, from microseconds at low temperatures to subnanoseconds at room temperature. The slow PL decay at low temperatures indicates localization of the photocarriers at the band tails. Due to the large band tail states, the PL decay time depends strongly on both the photon energy and excitation density. It is pointed out that the drastically enhanced nonradiative recombination at high temperatures is one of the main factors that determine the power conversion efficiency of CZTS-based solar cells.

Original languageEnglish
Article number081907
JournalApplied Physics Letters
Issue number8
Publication statusPublished - 2014 Feb 24
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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