Thermoelectric properties of the tetradymite-type Bi2Te2S-Sb2Te2S solid solution

D. C. Grauer, Y. S. Hor, A. J. Williams, R. J. Cava

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

The thermoelectric properties of the tetradymite-type Bi2-xSbxTe2S solid solution (0 ≤ x ≤ 2) are reported for the temperature range 5-300 K. The properties of non-stoichiometric, Cl and Sn doped n- and p-type variants are reported as well. The Seebeck coefficients for these materials range from -170 to +270 μV K-1 while the resistivities range from those of semimetals, 2 mΩ cm, to semiconductors, >1000 mΩ cm. Thermal conductivities were low for most compositions, typically 1.5 W m-1 K-1. Nominally undoped Bi2Te2S shows the highest thermoelectric efficiency amongst the tested materials with a ZT = 0.26 at 300 K that decreased to 0.04 at 100 K. The crystal structure of Sb2Te2S, a novel tetradymite-type material, is also reported.

Original languageEnglish (US)
Pages (from-to)1926-1929
Number of pages4
JournalMaterials Research Bulletin
Volume44
Issue number9
DOIs
StatePublished - Sep 1 2009

All Science Journal Classification (ASJC) codes

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

Keywords

  • A. Chalcogenides
  • C. X-ray diffraction
  • D. Electrical properties
  • D. Semiconductivity
  • D. Thermal conductivity

Fingerprint Dive into the research topics of 'Thermoelectric properties of the tetradymite-type Bi<sub>2</sub>Te<sub>2</sub>S-Sb<sub>2</sub>Te<sub>2</sub>S solid solution'. Together they form a unique fingerprint.

  • Cite this