Effect of Sn-substitution on thermoelectric properties of copper-based sulfide, famatinite Cu3SbS4

Yosuke Goto, Yuki Sakai, Yoichi Kamihara, Masanori Matoba

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Copper-based sulfide is an attractive material for Earth-abundant thermoelectrics. In this study, we demonstrate the effect of Sn-substitution on the electrical and thermal transport properties of fematinite Cu3SbS4 from 300 to 573 K. The carrier concentration is controlled in the range from 4 × 1018 to 8 × 1020 cm-3 by Sn-substitution. The density-of-states effective mass is found to be ∼3.0 me, assuming the single parabolic band model. The direct-type optical band gap is ∼0.9 eV, which is consistent with the density functional theory calculation. The dimensionless figure of merit reaches 0.1 for Sn-doped samples at 573 K.

Original languageEnglish
Pages (from-to)44706
Number of pages1
JournalJournal of the Physical Society of Japan
Issue number4
Publication statusPublished - 2015 Apr 15


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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