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Thermoelectric Properties of Mixed-Metal Tellurides

Published online by Cambridge University Press:  01 February 2011

Anthony V Powell ,
Fabien Guinet ,
Paz Vaqueiro ,
Ian M Wilcock  and
Richard L Jones
Anthony V Powell
Affiliation:
[email protected], Heriot-Watt University, Chemistry, Riccarton, Edinburgh, EH14 4AS, United Kingdom, 441314518034, 441314513180
Fabien Guinet
Affiliation:
[email protected], Heriot-Watt University, Department of Chemistry, Riccarton, Edinburgh, EH14 4AS, United Kingdom
Paz Vaqueiro
Affiliation:
[email protected], Heriot-Watt University, Department of Chemistry, Riccarton, Edinburgh, EH14 4AS, United Kingdom
Ian M Wilcock
Affiliation:
[email protected], DSTL, Physical Sciences Department, Salisbury, SP4 0JQ, United Kingdom
Richard L Jones
Affiliation:
[email protected], DSTL, Physical Sciences Department, Salisbury, SP4 0JQ, United Kingdom
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Abstract

A new series of thallium-containing materials, Tl1-xPbmATem+2 (A= Sb, Bi; m=10, 18; 0≤x≤0.3), has been prepared. Diffraction data reveal that a rocksalt-type structure is adopted at all compositions. Transport property measurements indicate n-type behaviour for the bismuth-containing materials and p-type for the antimony analogues. The reduced power factors for the latter, compared to the bismuth-containing materials, are primarily due to their more resistive nature. The highest power factors occur at a thallium deficiency in the range 0.1≤x≤0.2. Measured thermal conductivities are reduced from that of the binary telluride, suggesting that the materials may have potential as n/p-type components in device applications.

Keywords

thermoelectricitychemical synthesispowder
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1044: Symposium U – Thermoelectric Power Generation , 2007 , 1044-U08-04
Copyright
Copyright © Materials Research Society 2008

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