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Composition and the thermoelectric performance of β-Zn_4Sb_3

Toberer, Eric S. and Rauwel, Protima and Gariel, Sylvain and Taftø, J. and Snyder, G. Jeffrey (2010) Composition and the thermoelectric performance of β-Zn_4Sb_3. Journal of Materials Chemistry, 20 (44). pp. 9877-9885. ISSN 0959-9428. https://resolver.caltech.edu/CaltechAUTHORS:20101129-120143077

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Abstract

β-Zn_4Sb_3 is a promising thermoelectric material due to the abundance of zinc and antimony and reports of high efficiency in bulk samples. This work establishes the high temperature properties of β-Zn_4Sb_3 across the phase stability window. By controlling the stoichiometry, the Hall carrier concentration can be tuned from 6–9 × 10^(19) cm^(−3) without requiring extrinsic dopants. The trend in Seebeck coefficient on carrier concentration is rationalized with a single, parabolic band model. Extremely low lattice thermal conductivity (0.4–0.6 W m^(−1) K^(−1)) coupled with a moderate effective mass (1.2 m_e) and mobility leads to a large figure of merit (zT of 0.8 by 550 K). The single parabolic band model is used to obtain the carrier concentration dependence of the figure of merit and an optimum carrier concentration near 5 × 10^(19) cm^(−3) is predicted.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1039/c0jm02011gDOIUNSPECIFIED
http://pubs.rsc.org/en/Content/ArticleLanding/2010/JM/c0jm02011gPublisherUNSPECIFIED
ORCID:
AuthorORCID
Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2010 The Royal Society of Chemistry. Received 25th June 2010, Accepted 5th August 2010.
Issue or Number:44
Record Number:CaltechAUTHORS:20101129-120143077
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20101129-120143077
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21040
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:29 Nov 2010 22:37
Last Modified:03 Mar 2020 13:01

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