Enhanced of thermoelectric properties and effects of Sb doping on the electrical properties of Tl10-xSbxTe6 nano-particles

We have prepared the thallium antimony telluride with different doping concentration of Sb, Tl10-xSbxTe6 (x = 1, 1.25, 1.50, 1.75, 2) using solid state reaction techniques. Furthermore, Nano-particles were prepared from the ingot of the respective compound by ball milling techniques. X-rays diffraction analysis confirmed the phase purity of the compound, as no extra peaks were observed. The miller indices and lattice constant has been determined from the XRD data. Energy dispersive x-rays spectroscopy result confirmed the stoichiometric elemental composition of Tl10-xSbxTe6 compound. With increasing antimony (Sb) content the Seebeck coefficient (S) was increased, due to the affected electron hole ratio in the system. The contrary behavior of Seebeck co-efficient and electrical conductivity give rise to enhancement in power factor. Our study allows envisaging the application of Tl10-xSbxTe6 as one of the suitable materials for thermoelectric generator.