Thermoelectric Properties of the Tetradymite-Type Bi₂Te₂S-Sb₂Te₂S Solid Solution

Author

David C. Grauer
Yew San Hor, Missouri University of Science and TechnologyFollow
Anthony J. Williams
Robert Joseph Cava

Abstract

The thermoelectric properties of the tetradymite-type Bi_2-xSb_xTe₂S 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.

Recommended Citation

D. C. Grauer et al., "Thermoelectric Properties of the Tetradymite-Type Bi₂Te₂S-Sb₂Te₂S Solid Solution," Materials Research Bulletin, vol. 44, no. 9, pp. 1926 - 1929, Elsevier, Sep 2009.

The definitive version is available at https://doi.org/10.1016/j.materresbull.2009.05.002

Department(s)

Physics

Keywords and Phrases

Carbon Fiber Reinforced Plastics; Chalcogenides; Crystal Structure; Crystallization; Diffraction; Metalloids; Solid Solutions; Solidification; Thermal Conductivity; Thermoanalysis; Thermoelectric Equipment; Tin; X Ray Diffraction; Electric Properties; Electrical Properties; Semiconductivity

International Standard Serial Number (ISSN)

0025-5408

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 Elsevier, All rights reserved.

Publication Date

01 Sep 2009