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Hot carrier filtering in solution processed heterostructures: a paradigm for improving thermoelectric efficiency.

  • Author(s): Zhang, Yichi;
  • Bahk, Je-Hyeong;
  • Lee, Joun;
  • Birkel, Christina S;
  • Snedaker, Matthew L;
  • Liu, Deyu;
  • Zeng, Hongmei;
  • Moskovits, Martin;
  • Shakouri, Ali;
  • Stucky, Galen D
  • et al.
Abstract

An approach based on a solution-based synthesis that produces a thermally stable Ag/oxide/S₂ Te₃ -Te metal-semiconductor heterostructure is described. With this approach, a figure of merit of zT = 1.0 at 460 K is achieved, a record for a heterostructured material made using wet chemistry. Combining experiments and theory shows that the large increase in the material's Seebeck coefficient results from hot carrier filtering.

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