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Issue 6, 2011
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High thermoelectric figure of merit in heavy hole dominated PbTe

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Abstract

Thermoelectric transport properties of p-type PbTe:Na, with high hole concentrations of approximately 1020 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.

Graphical abstract: High thermoelectric figure of merit in heavy hole dominated PbTe

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Article information


Submitted
20 Sep 2010
Accepted
09 Dec 2010
First published
27 Jan 2011

Energy Environ. Sci., 2011,4, 2085-2089
Article type
Paper

High thermoelectric figure of merit in heavy hole dominated PbTe

Y. Pei, A. LaLonde, S. Iwanaga and G. J. Snyder, Energy Environ. Sci., 2011, 4, 2085
DOI: 10.1039/C0EE00456A

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