High Thermoelectric Performance in Sintered Octahedron-Shaped Sn(CdIn) xTe1+2 x Microcrystals.In this study, we fabricate In/Cd codoped octahedron-shape Sn(CdIn) xTe1+2 x microcrystals with a promising thermoelectric performance by using a facile solvothermal method.  Compared with the bulk counterparts, a much lower lattice thermal conductivity is achieved over a wide temperature range because of strong phonon scattering by point defects, nanoprecipitates, lattice distortion, and grain boundaries in the sintered SnIn xCd xTe1+2 x ( x = 3 and 4%) samples.  Consequently, a high ZT of ∼1.12 is obtained at 773 K in the p-type SnIn0.03Cd0.03Te1.06, suggesting that nanoprecipitate-included Cd/In codoped octahedron-shaped Sn(CdIn) xTe1+2 x microcrystals are a convincing candidate for medium-temperature thermoelectric applications.
THERM