The development of improved thermoelectric materials could lead to revolutionary advances in many important technologies such as, power generation of electron device, power generation of space flight, refrigeration of integrated circuit and cooling of superconducting. The search for high-performance thermoelectric materials is a hot subject of current research. The performance of thermoelectric materials depends on the dimensionless figure of merit (ZT) given by ZT = (S2σT/κ), where S,σ, T andκare the...