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.

Authors

  • Bo Yu

    Physics Dept., Boston College, Dept. of Physics, Boston College

  • Yi Ma

    Physics Dept., Boston College, Dept. of Physics, Boston College

  • Jian Yang

    Physics Dept., Boston College, Physics Department, Boston College, Chestnut Hill, MA02467, Dept. of Physics, Boston College

  • Bed Poudel

    GMZ Energy, Inc., Physics Dept., Boston College, Dept. of Physics, Boston College

  • Yucheng Lan

    Boston College, Physics Dept., Boston College, Dept. of Physics, Boston College

  • Dezhi Wang

    Boston College, Dept. of Physics, Boston College

  • Zhifeng Ren

    Boston College, Physics Dept., Boston College, Physics Department, Boston College, Chestnut Hill, MA02467, Dept. of Physics, Boston College

  • Qing Hao

    Department of Mechanical, Massachusetts Institute of Technology, Dept. of Mechanical Engineering, Massachusetts Institute of Technology

  • Gang Chen

    Massachusetts Institute of Technology, Department of Mechanical, Massachusetts Institute of Technology, Dept. of Mechanical Engineering, Massachusetts Institute of Technology, MIT