Enhancing thermoelectric performance of Bi2Te3-based nanostructures through rational structure design

Hong, Min and Chen, Zhi-Gang and Yang, Lei and Zou, Jin (2016) Enhancing thermoelectric performance of Bi2Te3-based nanostructures through rational structure design. Nanoscale, 8 (16). pp. 8681-8686. ISSN 2040-3364

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Abstract

Nanostructuring has been successfully employed to enhance the thermoelectric performance of Bi2Te3 due to its obtained low thermal conductivity. In order to further reduce the thermal conductivity, we designed a hierarchical nanostructure assembled with well-aligned Bi2Te3 nanoplates using Te nanotubes as templates by a facile microwave-assisted solvothermal synthesis. From the comparisons of their thermoelectric performance and theoretical calculations with simple Bi2Te3 nanostructures, we found that Te/Bi2Te3 hierarchical nanostructures exhibit a higher figure-of-merit due to the optimized reduced Fermi level and enhanced phonon scattering, as well as the suppressed bipolar conduction. This study provides an effective approach to enhance the thermoelectric performance of Bi2Te3-based nanostructures by rationally designing the nanostructures.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 27 Jun 2017 04:06
Last Modified: 14 Sep 2017 00:21
Uncontrolled Keywords: nanostructuring; thermoelectric performance; Bi2Te3; thermal conductivity
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1039/c6nr00719h
URI: http://eprints.usq.edu.au/id/eprint/31668

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