Author/Authors :
Hong، نويسنده , , A.J. and Li، نويسنده , , L. and Zhu، نويسنده , , H.X. and Zhou، نويسنده , , X.H. and He، نويسنده , , Q.Y. and Liu، نويسنده , , W.S. and Yan، نويسنده , , Z.B. and Liu، نويسنده , , J.-M. and Ren، نويسنده , , Z.F.، نويسنده ,
Abstract :
Copper silver selenide has two phases: low-temperature semimetal phase (α-CuAgSe) and high-temperature phonon-glass superionic phase (β-CuAgSe). In this work, the electric transport and thermoelectric properties of the two phases are investigated. It is revealed that β-CuAgSe is a p-type semiconductor and exhibits low thermal conductivity while α-CuAgSe shows metallic conduction with dominant n-type carriers and low electrical resistivity. The thermoelectric figure of merit zT of the polycrystalline β-CuAgSe at 623 K is ~ 0.95, suggesting that superionic CuAgSe can be a promising thermoelectric candidate in the intermediate temperature range.
