Te-Doped Cu2Se nanoplates with a high average thermoelectric figure of merit

Yang, Lei and Chen, Zhi-Gang and Han, Guang and Hong, Min and Huang, Liqing and Zou, Jin (2016) Te-Doped Cu2Se nanoplates with a high average thermoelectric figure of merit. Journal of Materials Chemistry A, 4 (23). pp. 9213-9219. ISSN 2050-7488

Abstract

Understanding the impact of dopants can direct the design of high-performance thermoelectric nanomaterials. In this study, we use Te as a dopant to modify Cu2Se nanoplates. It has been found that Te can be uniformly doped and distributed in the synthesized products to form Cu2Se1-xTex nanoplates with controlled Te content. Also, a phase transition from the original β-phase Cu2Se nanoplates to α-phase Cu2Se1-xTex nanoplates was observed with increasing Te doping level. From the thermoelectric evaluation of the sintered pellets of Cu2Se1-xTex nanoplates, it was found that Te can effectively modify their thermoelectric properties, especially their electrical transport properties. Finally, a high average figure-of-merit value of ∼1.2 in the temperature range from 400 K to 850 K was observed for the Cu2Se0.98Te0.02 sample.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 22 Jun 2017 02:53
Last Modified: 22 Jun 2017 02:53
Uncontrolled Keywords: alpha phase; beta-phase; electrical transport properties; figure of merits; sintered pellets; temperature range; thermoelectric figure of merit; thermoelectric properties; thermoelectric energy; electricity, basic concepts and phenomena; nanotechnology; solid state physics
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/c6ta02998a
URI: http://eprints.usq.edu.au/id/eprint/31673

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