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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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Publication details

The article was received on 20 Sep 2010, accepted on 09 Dec 2010 and first published on 27 Jan 2011


Article type: Paper
DOI: 10.1039/C0EE00456A
Citation: Energy Environ. Sci., 2011,4, 2085-2089
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    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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