Year: 2015
Type: article
Abstract: Electrical and thermal transport properties of Cu-deficient kuramite Cu 3− x SnS 4 (CTS) was examined as a possible earth-abundant thermoelectric material. Crystallographic structure of CTS was characterized by partial disorder between Cu and Sn. In contrast to semiconducting electrical transport of related compounds, such as Cu 2 ZnSnS 4 and Cu 3 SbS 4 , metallic conduction with an electrical resistivity of 0.4 mΩ cm and a carrier concentration of 3 × 10 21 cm −3 was observed at 300 K. Lattice thermal conductivity was calculated at ∼2.6 W m −1 K −1 , which was probably reduced by Cu-deficiency and/or partial cation disorder. Density functional theory calculation indicates valence band was composed of hybridization between Cu 3d orbitals and S 3p orbitals.
Authors: Yosuke Goto, Yuki Sakai, Yoichi Kamihara, Masanori Matoba
Institution: Keio University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1481440139