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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Abstract

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
Volume84
Issue number4
DOIs
Publication statusPublished - 2015 Apr 15

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sulfides
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copper
figure of merit
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density functional theory

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Effect of Sn-substitution on thermoelectric properties of copper-based sulfide, famatinite Cu3SbS4. / Goto, Yosuke; Sakai, Yuki; Kamihara, Yoichi; Matoba, Masanori.

In: Journal of the Physical Society of Japan, Vol. 84, No. 4, 15.04.2015, p. 44706.

Research output: Contribution to journalArticle

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