TY - JOUR
T1 - Effect of Sn-substitution on thermoelectric properties of copper-based sulfide, famatinite Cu3SbS4
AU - Goto, Yosuke
AU - Sakai, Yuki
AU - Kamihara, Yoichi
AU - Matoba, Masanori
N1 - Publisher Copyright:
©2015 The Physical Society of Japan.
PY - 2015/4/15
Y1 - 2015/4/15
N2 - 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.
AB - 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.
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U2 - 10.7566/JPSJ.84.044706
DO - 10.7566/JPSJ.84.044706
M3 - Article
AN - SCOPUS:84926435390
SN - 0031-9015
VL - 84
SP - 44706
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 4
ER -