High-temperature thermoelectric properties of Cu1.97Ag0.03Se1+y

被引：38

作者：

Day T.W. ^{[1
]}

Borup K.A. ^{[2
]}

Zhang T. ^{[3
]}

Drymiotis F. ^{[1
]}

Brown D.R. ^{[1
]}

Shi X. ^{[3
]}

Chen L. ^{[3
]}

Iversen B.B. ^{[2
]}

Snyder G.J. ^{[1
]}

机构：

[1] Department of Materials Science, California Institute of Technology, Pasadena, 91106, CA

[2] Department of Chemistry and INANO, Center for Materials Crystallography, Aarhus University, Aarhus

[3] CAS Key Laboratory of Energy-conversion Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai

来源：

Materials for Renewable and Sustainable Energy | 2014年 / 3卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Carrier concentration optimization; Copper selenide; Cu[!sub]1.97[!/sub]Ag[!sub]0.03[!/sub]Se[!sub]1+y[!/sub; Thermoelectrics;

D O I：

10.1007/s40243-014-0026-5

中图分类号：

学科分类号：

摘要：

Copper selenide is of recent interest as a high-performance p-type thermoelectric material. Adding Ag to copper selenide increases the dimensionless figure-of-merit zT up to 780 K, with Cu1.97Ag0.03Se reaching a zT of 1.0 at 870 K. The increase compared with Cu2Se can be explained by analyzing the Hall carrier concentration and effective mass. Addition of Ag reduces the carrier concentration to a nearly optimum value at high temperature. If the Hall carrier concentration were to be further reduced to 6.6 × 1020 cm-3 at 750 K, the average zT would be substantially improved for waste heat recovery applications. © 2014 The Author(s).

引用

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