Thermal conductivity and thermoelectric power of compounds in the Cu–Ge–As–Se system

The influence of temperature (in the interval of 300–400 K) and concentrations on the electrical conductivity, thermal conductivity, and thermoelectric power of copper chalcogenide-based crystals with the general formula (GeSe)$_{1-x}$(CuAsSe$_{2}$)$_{x}$ has been considered. Heat transfer mechanisms have been determined. It has been found that the temperature dependence of thermal conductivity is nonmonotonic with a singularity at 358 K. Thermoelectric figure of merit $ZT$ has been calculated.