Cd substitution in Zintl phase Eu5In2Sb6 enhancing the thermoelectric performance

Lv, Wanyu and Yang, Chunhui and Lin, Jianwei and Hu, Xinyi and Guo, Kai and Yang, Xinxin and Luo, Jun and Zhao, Jing-Tai (2017) Cd substitution in Zintl phase Eu5In2Sb6 enhancing the thermoelectric performance. Journal of Alloys and Compounds, 726. pp. 618-622. ISSN 0925-8388

Abstract

Rare earth-contained compound Eu5In2Sb6 which shows improved air stability and competitive thermoelectric properties in comparison to its alkaline earth analogues, has attracted much attention recently for thermoelectric applications. Polycrystalline samples Eu5In2-xCdxSb6 (x ¼ 0, 0.01, 0.02, 0.06, 0.08, 0.1) were synthesized via a direct element combination reaction and subsequent hot-press sintering. With increasing Cd concentration, both the electrical resistivity and Seebeck coefficient decrease monotonously, and the conductive behaviors vary essentially from non-degenerate semiconductor to degenerate semiconductor. The maximum value of power factor (5.78 mW/cm*K2 ) can be obtained with x ¼ 0.1. While the total thermal conductivity rise as a result of the contribution of electronic part, the thermoelectric figure of merit zT for Eu5In2-xCdxSb6 can be enhanced up to 0.5 at 709 K


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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: 04 Apr 2019 03:21
Last Modified: 05 Apr 2019 00:53
Uncontrolled Keywords: Eu5In2Sb6; Zintl phase; Semiconductors; Thermoelectric properties
Fields of Research : 02 Physical Sciences > 0299 Other Physical Sciences > 029999 Physical Sciences not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1016/j.jallcom.2017.08.033
URI: http://eprints.usq.edu.au/id/eprint/35632

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