期刊
SOLID STATE IONICS
卷 261, 期 -, 页码 21-25出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2014.03.025
关键词
CuAgSe; Phonon-glass superionic; Thermoelectric performances
资金
- National 973 Projects of China [2011CB922101]
- National Natural Science Foundation of China [11234005, 11374147, 51372092]
- Priority Academic Program Development of Jiangsu Higher Education Institutions, China
Copper silver selenide has two phases: low-temperature semimetal phase (alpha-CuAgSe) and high-temperature phonon-glass superionic phase (beta-CuAgSe). In this work, the electric transport and thermoelectric properties of the two phases are investigated. It is revealed that beta-CuAgSe is a p-type semiconductor and exhibits low thermal conductivity while alpha-CuAgSe shows metallic conduction with dominant n-type carriers and low electrical resistivity. The thermoelectric figure of merit zT of the polycrystalline beta-CuAgSe at 623 K is similar to 0.95, suggesting that superionic CuAgSe can be a promising thermoelectric candidate in the intermediate temperature range. (C) 2014 Elsevier B.V. All rights reserved.
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