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A1: Low temperature materials
Laboratoire CRISMAT CNRS ENSICAEN UCBN
Doped bismuth telluride is well known to be the most efficient thermoelectric material operating around room temperature since the 60’s. However, many research groups still work on the optimization of the properties of this unique material.
In this work, n-type bismuth selenido telluride is synthesized by direct mechanical alloying of the elements and is sintered by SPS. Several ways to improve the properties have been studied: Copper doping, increased texture by spark plasma texturing, and carbon nanotube inclusion. This contribution summarizes our main findings and demonstrates that there is still room for improvement of the thermoelectric properties of such an ancient material.