Charge Transport and Thermo-emf in TlFe_1−xGa_xS₂ Solid Solutions

Abstract

TlFe1−xGaxS2 solid solutions have been prepared by direct elemental synthesis. The dependences of the thermoelectric properties and DC conductivity on temperature have been studied in TlFe1−xGaxS2 solid solutions. In terms of hopping mechanism of charge transfer, the parameters of localized states in the forbidden gap of TlFe1−xGaxS2 have been evaluated. The type of conductivity has been determined from the temperature dependences of thermoelectric power of TlFe1−xGaxS2 solid solutions.