Issue 1, 2016

Single parabolic band behavior of thermoelectric p-type CuGaTe2

Abstract

The existence of a noticeable discrepancy in thermoelectric properties reported in the literature motivates the current work on the transport properties of CuGaTe2. Taking Zn- and Mn-doping at the Ga site as an example, the hole concentration can be effectively tuned within 1018–1020 cm−3 that enables a reliable assessment of the transport properties. It is evident that both temperature and carrier concentration dependent transport properties follow well within the framework of a single parabolic band approximation with a dominant carrier scattering by acoustic phonons. This work helps distinguish the effects that contribute to the high thermoelectric figure of merit zT in CuGaTe2. The modeling further suggests that this compound can show a thermoelectric figure of merit of unity or higher, when further strategies are taken for reducing the lattice thermal conductivity and engineering the band structure.

Graphical abstract: Single parabolic band behavior of thermoelectric p-type CuGaTe2

Article information

Article type
Paper
Submitted
14 Oct 2015
Accepted
16 Nov 2015
First published
16 Nov 2015

J. Mater. Chem. C, 2016,4, 209-214

Author version available

Single parabolic band behavior of thermoelectric p-type CuGaTe2

J. Shen, Z. Chen, S. lin, L. Zheng, W. Li and Y. Pei, J. Mater. Chem. C, 2016, 4, 209 DOI: 10.1039/C5TC03325J

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