High performance p-type half-Heusler thermoelectric materials

Half-Heusler compounds, which possess robust mechanical strength, good high temperature thermal stability and multifaceted physical properties, have been verified as a class of promising thermoelectric materials. During the last two decades, great progress has been made in half-Heusler thermoelectri...

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Published inJournal of physics. D, Applied physics Vol. 51; no. 11; pp. 113001 - 113015
Main Authors Yu, Junjie, Xia, Kaiyang, Zhao, Xinbing, Zhu, Tiejun
Format Journal Article
LanguageEnglish
Published IOP Publishing 21.03.2018
Subjects
half-Heusler alloys
optimization strategy
thermoelectric materials
thermoelectric properties
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Summary:Half-Heusler compounds, which possess robust mechanical strength, good high temperature thermal stability and multifaceted physical properties, have been verified as a class of promising thermoelectric materials. During the last two decades, great progress has been made in half-Heusler thermoelectrics. In this review, we summarize some representative work of p-type half-Heusler materials, the thermoelectric performance of which has been remarkably enhanced in recent years. We introduce the features of the crystal and electronic structures of half-Heusler compounds, and successful strategies for optimizing electrical and thermal transport in the p-type RFeSb (R  =  V, Nb, Ta) and MCoSb (M  =  Ti, Zr, Hf) based systems, including band engineering, the formation of solid solutions and hierarchical phonon scattering. The outlook for future research directions of half-Heusler thermoelectrics is also presented.
Bibliography:JPhysD-115381.R1
ISSN:0022-3727
1361-6463
DOI:10.1088/1361-6463/aaaa58