Thermoelectric transport in indium and aluminum-doped lead selenide

We present galvanomagnetic and thermomagnetic properties of bulk PbSe doped by substituting the donor elements In and Al for Pb. Although prominent resonant level effects are not seen, lightly doped samples display a high thermoelectric figure of merit (zT) in excess of 1.2 at 600 K, a temperature c...

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Bibliographic Details
Published in:Journal of applied physics 2014-02, Vol.115 (5)
Main Authors: Evola, E. G., Nielsen, M. D., Jaworski, C. M., Jin, H., Heremans, J. P.
Format: Article
Language:English
Subjects:
Aluminum
Applied physics
charge transport
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Electromagnetism
Figure of merit
Heat recovery systems
Lead selenides
materials and chemistry by design
Materials recovery
MATERIALS SCIENCE
mechanical behavior
Phonon drag
phonons
solar (thermal)
synthesis (novel materials)
synthesis (scalable processing)
synthesis (self-assembly)
thermal conductivity
thermoelectric
Thermoelectricity
Waste heat recovery
Weight reduction
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Summary:We present galvanomagnetic and thermomagnetic properties of bulk PbSe doped by substituting the donor elements In and Al for Pb. Although prominent resonant level effects are not seen, lightly doped samples display a high thermoelectric figure of merit (zT) in excess of 1.2 at 600 K, a temperature corresponding well to automotive waste heat recovery applications. This material's high zT is achieved without the use of nanostructuring or the relatively rare element Te. Phonon drag contributions to thermopower appear at temperatures below 30 K in Al-doped samples.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4862812