Maximizing thermoelectric figure-of-merit at high temperature in p-type Bi-Sb-Te system.
POSTER
Abstract
Bismuth telluride alloys and their derivatives are the most important thermoelectric materials used in refrigeration devices around room temperature. Using mechanical alloying and hot press, we have achieved 100{\%} dense nano-structured p-type Bi$_{x}$Sb$_{2-x}$Te$_{3}$ samples. We demonstrated here that the enhanced dimensionless figure-of-merit (ZT) are due to enhanced phonon-scattering, and the ZT peak could be easily shifted to higher temperature by varying the composition and processing conditions.