The possibility of using an n-type Bi2−xSbxTe3 solid solution in thermoelectric refrigerators at T<200 K is considered. It is shown that, if the material under consideration is optimized for the above temperature region, the temperature dependence of the Seebeck coefficient α becomes less pronounced, and the crystal-lattice thermal conductivity κL decreases as compared to what is observed in a conventional n-Bi2Te3−ySey solid solution. These factors and a high mobility of charge carriers μ0 bring about an increase in the parameter β ∼ ZT, where Z is the thermoelectric efficiency.