Abstract
In this paper we present details of a technique of measurement of the thermoelectric power (Seebeck effect) at high pressure to 30 GPa. Two examples of its application are displayed as follows: lead (Pb) and bismuth telluride alloys (Bi2Te3 and InxBi2−xTe3). For lead a kink in the pressure dependence of the thermopower near 13 GPa has been established and addressed to the structural fcc → hcp phase transition. The (In,Bi)2Te3 thermoelectrics exhibited a pressure-driven improvement of the thermoelectric parameters, such as thermoelectric power factor (efficiency) and the dimensionless figure of merit. The reasons of this enhancement are discussed.
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