Special Measurement Techniques For Thermoelectric Materials With Results For Bi2Te3 And Alloys With Bi2Se3

摘要

A new technique has been devised for the accurate measurement of the absolute values of the thermoelectric power and thermal conductivity. The method involves the use of the Peltier heat to maintain a temperature gradient across the specimen. The measurement of this gradient, the voltage across the specimen, and the a-c resistivity allows the calculation of the absolute value of the thermoelectric power and the thermal conductivity. An especially useful feature of the method is that the thermoelectric figure of merit is given in terms of the ratio of voltages. Some results for Bi2Te3 and alloys with Bi2Se3 are presented.