Published June 2011
| Published
Journal Article
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High thermoelectric figure of merit in heavy hole dominated PbTe
Abstract
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.
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.Attached Files
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Additional details
- Eprint ID
- 24162
- Resolver ID
- CaltechAUTHORS:20110622-075042464
- NASA/JPL
- Defense Advanced Research Projects Agency (DARPA) Nano Materials Program
- Created
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2011-06-22Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field