Аннотация:In this work, we have investigated the temperature dependences of the resistance ρ (in the temperature range 4.2 K < T < 330 K) of single crystals of Bi2−xAsxTe3 (0 < x < 0.034), Sb2−xCuxTe3 (0 < x < 0.1), and Sb2−xSnxTe3 (0 < x < 0.0075), as well as the thermopower and thermal conductivity of solid solutions of Bi2−xAsxTe3 in the temperature range 77 K < T < 330 K. In the temperature range of 100–320 K, the dependence ρ(T ) follows a power law with an exponent m = 2 (Bi2−xAsxTe3), m = 1.2−1.1 (Sb2−xCuxTe3), andm = 1.2−0.6 (Sb2−xSnxTe3). For Bi2−xAsxTe3, it has been established that the conductivity decreases, while the Seebeck coefficient initially increases significantly and then decreaseswith increasing x. The thermal conductivity of samples with As decreases compared to the original bismuth telluride atT < 250 K. As a result, the maximum thermoelectric figure of merit ZT shifts from 300 to 250 K with increasing As content.
