Investigation of low resistance contacts to Pb-Sb-Ag-Te (LAST) materials for module fabrication

Jonathan D'Angelo*, Jarrod L. Short, Adam D. Downey, Michael A. Pajor, Timothy P. Hogan, Duck Young Chung, Mercouri G. Kanatzidis, Ed Timm, Harold Schock

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Low electrical contact resistance is essential for the fabrication of high efficiency thermoelectric generators. These contacts must be stable to high temperatures and through thermal cycling. Here we present the fabrication procedure and characterization of several contacts to Pb-Sb-Ag-Te (LAST) compounds. Contact materials investigated include tungsten, antimony, tin, nickel, and a bismuth antimony based solder. The contacts were typically deposited by an electron beam evaporation method after careful preparation of the sample surface. The resistances were measured by using the transmission line model (TLM), and ohmic behavior was verified through current vs. voltage measurements. The best contact resistivities of less than 20 μΩ·cm 2 have been measured for annealed antimony to n-type LAST samples. We present these procedures for fabricating low resistance contacts and the use of these contact materials toward the fabrication of high efficiency thermoelectric generator modules.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
Pages317-322
Number of pages6
Volume886
StatePublished - May 8 2006
Event2005 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 28 2005Dec 1 2005

Other

Other2005 Materials Research Society Fall Meeting
CountryUnited States
CityBoston, MA
Period11/28/0512/1/05

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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