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arXiv · 1510.06616

Anomalous transport and thermoelectric performances of CuAgSe compounds

A. J. Hong·L. Li·H. X. Zhu·X. H. Zhou·Q. Y. He·W. S. Liu·Z. B. Yan·J. M. Liu·Z. F. Ren
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Abstract

The copper silver selenide has two phases: the low-temperature semimetal phase (α-CuAgSe) and high-temperature phonon-glass superionic phase (\b{eta}-CuAgSe). In this work, the electric transport and thermoelectric properties of the two phases are investigated. It is revealed that the \b{eta}-CuAgSe is a p-type semiconductor and exhibits low thermal conductivity while the α-CuAgSe shows metallic conduction with dominant n-type carriers and low electrical resistivity. The thermoelectric figure of merit zT of the polycrystalline \b{eta}-CuAgSe at 623 K is ~0.95, suggesting that superionic CuAgSe can be a promising thermoelectric candidate in the intermediate temperature range.

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A. J. Hong, L. Li, H. X. Zhu, X. H. Zhou, Q. Y. He, W. S. Liu, Z. B. Yan, J. M. Liu, Z. F. Ren. 2015-10-22. Anomalous transport and thermoelectric performances of CuAgSe compounds. https://arxiv.org/abs/1510.06616

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