We investigate the effects of the ambient temperature (_T_), both temperature (_T_ _a_ )and time (_t_ _a_ )of annealing on the electrical conductivity (σ), and the Seebeck coefficient (_S_) of Sb2Te3. We concluded that both holes and electrons can participate to the conduction process. The material behaves as a semimetal. Although the Seebeck coefficient possesses a plus sign, the coefficient ... إقراء المزيد