Enhancement of Thermoelectric Power Factor Through Modification of Electronic Structure in PbTe:Cr

摘要

The thermoelectric performance of PbTe:Cr nanocomposites with locally distorted density of states is investigated. The sharpness and location of the localized states has been found to be an effective factor in tuning the transport properties of the system. The enhancement of electron effective mass and scattering parameter has been supposed to be the main cause of the remarkable enhancement of thermopower and power factor with room temperature values of -192 (mu)V/K and 33.17 X 10~(-4) Wm~(-1) K~(-2) for the specimen with carrier concentration of 6.32 X 10~(18) cm~(-3).