Thermoelectric Performance Testing Methods and Devices

Abstract

The main index for measuring the conversion efficiency of thermoelectric devices is the thermoelectric figure of merit (ZT value) of the thermoelectric material. If the conversion efficiency needs to be increased, the ZT value needs to be increased. According to the expression of ZT, its value is closely related to the Seebeck coefficient, electrical conductivity and thermal conductivity of the material. Because the three physical quantities of Seebeck coefficient, electrical conductivity and thermal conductivity are coupled to each other, it is difficult to adjust synchronously, and the ZT value and thermoelectric conversion efficiency are difficult to be greatly improved. By accurately measuring the three parameters of the material and related carrier characteristics, it is beneficial to adjust the method and conditions of material synthesis and improve the thermoelectric performance of the material.