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High thermoelectric figure of merit in heavy hole dominated PbTe

Pei, Yanzhong and LaLonde, Aaron and Iwanaga, Shiho and Snyder, G. Jeffrey (2011) High thermoelectric figure of merit in heavy hole dominated PbTe. Energy and Environmental Science, 4 (6). pp. 2085-2089. ISSN 1754-5692.

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Thermoelectric transport properties of p-type PbTe:Na, with high hole concentrations of approximately 10^(20) cm^(−3), are reinvestigated from room temperature to 750 K. The greatly enhanced Seebeck coefficient at these doping levels can be understood by the presence of a sharp increase in the density of states around the Fermi level. As a result, the thermoelectric figure of merit, zT, reaches ~1.4 at 750 K. The influence of these heavy hole carriers may contribute to a similarly high zT observed in related p-type PbTe-based systems such as Tl-doped PbTe and nanostructured composite materials.

Item Type:Article
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Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2011 The Royal Society of Chemistry. Received 20th September 2010, Accepted 9th December 2010. First published on the web 27 Jan 2011. This work is supported by NASA-JPL and DARPA Nano Materials Program. The authors thank Alex Z. Williams and Fred Harris for careful measurements of transport properties at JPL and ZTPlus Inc.; and Norb Elsner for useful discussions and Michael Boettger for the design of the cover image.
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA) Nano Materials ProgramUNSPECIFIED
Issue or Number:6
Record Number:CaltechAUTHORS:20110622-075042464
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Official Citation:High thermoelectric figure of merit in heavy hole dominated PbTe Yanzhong Pei, Aaron LaLonde, Shiho Iwanaga and G. Jeffrey Snyder Energy Environ. Sci., 2011, 4, 2085-2089 DOI: 10.1039/C0EE00456A
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24162
Deposited By: Ruth Sustaita
Deposited On:22 Jun 2011 20:29
Last Modified:03 Mar 2020 13:01

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