High-efficient thermoelectric materials: The case of orthorhombic IV-VI compounds View Full Text


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Article Info

DATE

2015-06-05

AUTHORS

Guangqian Ding, Guoying Gao, Kailun Yao

ABSTRACT

Improving the thermoelectric efficiency is one of the greatest challenges in materials science. The recent discovery of excellent thermoelectric performance in simple orthorhombic SnSe crystal offers new promise in this prospect [Zhao et al. Nature 508, 373 (2014)]. By calculating the thermoelectric properties of orthorhombic IV-VI compounds GeS,GeSe,SnS and SnSe based on the first-principles combined with the Boltzmann transport theory, we show that the Seebeck coefficient, electrical conductivity and thermal conductivity of orthorhombic SnSe are in agreement with the recent experiment. Importantly, GeS, GeSe and SnS exhibit comparative thermoelectric performance compared to SnSe. Especially, the Seebeck coefficients of GeS, GeSe and SnS are even larger than that of SnSe under the studied carrier concentration and temperature region. We also use the Cahill's model to estimate the lattice thermal conductivities at the room temperature. The large Seebeck coefficients, high power factors and low thermal conductivities make these four orthorhombic IV-VI compounds promising candidates for high-efficient thermoelectric materials. More... »

PAGES

9567

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/srep09567

DOI

http://dx.doi.org/10.1038/srep09567

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1039742874

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/26045338


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