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

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

doi:10.1016/j.materresbull.2009.05.002

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 journal › Article › peer-review

37 Scopus citations

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.

Original language	English (US)
Pages (from-to)	1926-1929
Number of pages	4
Journal	Materials Research Bulletin
Volume	44
Issue number	9
DOIs	https://doi.org/10.1016/j.materresbull.2009.05.002
State	Published - Sep 2009

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Keywords

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

Access to Document

10.1016/j.materresbull.2009.05.002

Cite this

@article{be1b39af17d14ab5a254ec8557ad14c7,

title = "Thermoelectric properties of the tetradymite-type Bi2Te2S-Sb2Te2S solid solution",

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.",

keywords = "A. Chalcogenides, C. X-ray diffraction, D. Electrical properties, D. Semiconductivity, D. Thermal conductivity",

author = "Grauer, {D. C.} and Hor, {Y. S.} and Williams, {A. J.} and Cava, {R. J.}",

note = "Funding Information: This research was supported by the Air Force Office of Scientific Research, grant FA9550-06-1-0530.",

year = "2009",

month = sep,

doi = "10.1016/j.materresbull.2009.05.002",

language = "English (US)",

volume = "44",

pages = "1926--1929",

journal = "Materials Research Bulletin",

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AU - Grauer, D. C.

AU - Hor, Y. S.

AU - Williams, A. J.

AU - Cava, R. J.

N1 - Funding Information: This research was supported by the Air Force Office of Scientific Research, grant FA9550-06-1-0530.

PY - 2009/9

Y1 - 2009/9

N2 - 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.

AB - 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.

KW - A. Chalcogenides

KW - C. X-ray diffraction

KW - D. Electrical properties

KW - D. Semiconductivity

KW - D. Thermal conductivity

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