n-type Bi-doped PbTe nanocubes with enhanced thermoelectric performance

Yang, Lei and Chen, Zhi-Gang and Hong, Min and Wang, Lihua and Kong, Deli and Huang, Liqing and Han, Guang and Zou, Yichao and Dargusch, Matthew and Zou, Jin (2017) n-type Bi-doped PbTe nanocubes with enhanced thermoelectric performance. Nano Energy, 31. pp. 105-112. ISSN 2211-2855

Abstract

In this study, Bi was selected to dope PbTe nanocubes to develop high performance n-type PbTe-based
thermoelectric materials via nanostructure engineering using a facile solvothermal method. Bi dopants
effectively improve the electrical transport properties of the as-sintered PbTe nanomaterials by tuning the
carrier concentrations, achieving promising electrical conductivity and Seebeck coefficient which are comparable
to bulk materials. Moreover, a low lattice thermal conductivity has been secured in the sintered Bi-doped
PbTe nanomaterials, which is remarkably lower than its bulk counterparts. Extensive experimental and
theoretical evidences reveal that such low lattice thermal conductivity is attributed to the enhanced phonon
scattering by the high density of grain boundaries and dislocations, in turn, leading to an enhanced peak
ZT~1.35 at 675 K for n-type Pb0.99Bi0.01Te.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 13 Jun 2017 01:56
Last Modified: 13 Jun 2017 01:56
Uncontrolled Keywords: thermoelectric; n-type; bi-doped PbTe; nanostructure engineering
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Funding Details:
Identification Number or DOI: 10.1016/j.nanoen.2016.11.027
URI: http://eprints.usq.edu.au/id/eprint/30775

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