Enhanced TE properties of Cu@Ag/Bi2Te3 nanocomposites by decoupling electrical and thermal properties

The key process of fabricating Cu@Ag/Bi2Te3 heterostructure constructed by new composite method of ultrasonic dispersion-rapid freeze-freeze drying, and Cu@Ag/Bi2Te3 composite exhibited a higher thermoelectric figure of merit than pure Bi2Te3 due to the decoupling of three parameters.