Extruded thermoelectric materials based on Bi2Te3-Bi2Se3 solid solutions

Abstract

Extruded n -type materials based on Bi 2 Te 3 -Bi 2 Se 3 alloys containing 6 to 40 mol % Bi 2 Se 3 have been investigated using microstructural analysis and thermoelectric measurements at room temperature and in the range 100–400 K. Their electrical properties have been compared to those of single-crystal analogs. Compositions have been found at which the extruded materials offer the highest thermoelectric performance in different temperature ranges.