Thermoelectric properties of the cubic family of compounds AgPbBiQ3 (Q = S, Se, Te). Very low thermal conductivity materials

S. Sportouch, M. Bastea, P. Brazis, J. Ireland, C. R. Kannewurf, C. Uher, M. G. Kanatzidis

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

The AgPbBiQ3 class of compounds and their solid solution members are related to the NaCl structure type, where Ag, Pb and Bi atoms are statistically disordered on the Na site and Q atoms occupy the Cl site. These compounds were synthesized by combining the elements in the appropriate ratio and heating under static vacuum at 900°C for 3 days. They are narrow gap semiconductors with band gaps in the range of 0.6 to 0.28 eV. The charge-transport properties were measured on ingots as a function of temperature. The compounds AgPbBiTe3, AgPbBiSe3, AgPbBiTe2.75Se0.25 and AgPbBiTe2Se, undoped, possess an electrical conductivity in the range of 70 S/cm to 400 S/cm. These materials exhibit negative thermopower ranging from -40 μV/K to -160 μV/K at room temperature and thermal conductivity less than 1.30 W/mK.

Original languageEnglish
Pages (from-to)123-130
Number of pages8
JournalMaterials Research Society Symposium - Proceedings
Volume545
Publication statusPublished - Jan 1 1999
EventProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998' - Boston, MA, USA
Duration: Nov 30 1998Dec 3 1998

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ASJC Scopus subject areas

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

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