Anomalous transport and thermoelectric performances of CuAgSe compounds

作者：Hong, A J; Li, T; Zhu, H X; Zhou, X H; He, Q Y; Liu, W S; Yan, Z B; Liu, J M^*; Ren, Z F

来源：Solid State Ionics, 2014, 261: 21-25.

DOI：10.1016/j.ssi.2014.03.025

• CuAgSe
• Phonon-glass superionic
• Thermoelectric performances

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.

• 出版日期2014-8
• 单位南京大学; 华南师范大学