Study on the fabrication and characterization of LAST and LASTT based thermoelectric generators

Chun I. Wu, Edward J. Timm, Fei Ren, Bradley D. Hall, Jennifer Ni, Adam Downey, Jonathan D'Angelo, Jarrod Short, Harold Schock, Eldon Case, Joe Sootsman, Mi Kyoung Han, Mercouri Kanatzidis, Duck Young Chung, Timothy P. Hogan

Research output: Contribution to journalConference articlepeer-review

Abstract

Thermoelectric modules are of great interest for power generation applications where temperature gradients of approximately 500K exist, and hot side temperatures near 800K. The fabrication of such modules requires optimization of the material compositions, low contact resistivities, and low thermal loss. AgPbmSbTe2+m (LAST) and Ag(Pb 1-xSnx)m SbTe2+m (LASTT) compounds are among the best known materials appropriate for this temperature range. Various measurement systems have been developed and used to characterize bulk samples in the LAST and LASTT systems within this operating temperature range. From the characterized data, modeling of modules based on these materials and segmented legs using LAST(T) with Bi2Te3 have been used to identify the optimal geometry for the individual legs, and the length of the Bi2Te3 segments. We have segmented LAST(T) with Bi 2Te3 and achieved contact resistivities of less than 10 μΩ·cm2. Here we give a detailed presentation on the procedures used in the fabrication of thermoelectric generators based on LAST, LASTT, and segmented with Bi2Te3 materials. We also present the output data on these generators.

Original languageEnglish
Pages (from-to)441-447
Number of pages7
JournalMaterials Research Society Symposium Proceedings
Volume1044
Publication statusPublished - Oct 10 2008
EventThermoelectric Power Generation - Boston, MA, United States
Duration: Nov 26 2007Nov 29 2007

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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