| Abstract Scope |
In the present study, we have reported for the first time the thermoelectric (TE) properties of a series of Cu-Sn based thiospinel compounds by screening a variety of transition elements as a potential substituent at the Sn-site with the designed composition CuM1+xSn1-xS4 (M = Transition metal), besides an in-depth structural, electronic band structure investigation and a brief outlook at their magnetic properties. The optimized synthesis and processing conditions reported here enabled to realize highly densified and mostly pure (single phase) compounds with both p- and n-type compounds. We highlighted that Sn-based thiospinel are attractive by their reduce thermal transport (klatt ≈ 1 W/m.K@673K) compare with others TE thiospinel reported. Finally, the composition with M = Cr appeared as the most attractive TE properties due to the simultaneous increase of Seebeck coefficient and electrical conductivity with increasing temperature, thus resulting in a respectable power factor (PF ≈ 0.35 mW/m.K2@673K). |