Title

Giant Pressure-Induced Enhancement of Seebeck Coefficient and Thermoelectric Efficiency in SnTe

Document Type

Article

Publication Date

1-1-2017

Publication Title

ChemPhysChem

Volume

18

Issue

23

First page number:

3315

Last page number:

3319

Abstract

The thermoelectric properties of polycrystalline SnTe have been measured up to 4.5 GPa at 330 K. SnTe shows an enormous enhancement in Seebeck coefficient, greater than 200 % after 3 GPa, which correlates to a known pressure-induced structural phase transition that is observed through simultaneous in situ X-ray diffraction measurement. Electrical resistance and relative changes to the thermal conductivity were also measured, enabling the determination of relative changes in the dimensionless figure of merit (ZT), which increases dramatically after 3 GPa, reaching 350 % of the lowest pressure ZT value. The results demonstrate a fundamental relationship between structure and thermoelectric behaviours and suggest that pressure is an effective tool to control them. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Language

english

Find It

UNLV article access

Search your library

Share

COinS