Crystal structure and thermoelectric properties of Cu2Cd1-xZnxSnSe4 solid solutions

被引：7

作者：

Liu, F. S.

Wang, B.

Ao, W. Q.

Li, Y.

Li, J. Q. ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China

来源：

INTERMETALLICS | 2014年 / 55卷

基金：

中国国家自然科学基金;

关键词：

Functional alloys; Thermoelectric properties; X-ray diffraction;

D O I：

10.1016/j.intermet.2014.06.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cu2Cd1-xZnSnSe4 solid solutions were synthesized, and their phase constitutions and thermoelectric properties were investigated. The solid solutions crystallized in the stannite-type structure for Zn contents x up to 0.65 and in the kesterite-type structure for 0.7 <= x <= 1.0. The lattice parameter a and cell volume V of the compounds decreased linearly with increasing x for both the stannite-type (0 <= x <= 0.65) and the kesterite-type (0.7 <= x <= 1) structures. The lattice parameter c decreased with increasing x for the compounds with the kesterite-type structure but increased for the compounds with the stannite-type structure. The c/a ratio increased with increasing Zn content, which indicated an weakening of the lattice distortion. The Seebeck coefficient tended to decrease with increasing Zn content, whereas the electrical conductivity and thermal conductivity increased. The figure of merit ZT increased with increasing x over the composition range of 0 <= x <= 0.60 and then fluctuated with a further increase in x. A maximum ZT of 0.23 was achieved for Cu2Cd0.4Zn0.6SnSe4 at 720 K. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：15 / 21

页数：7

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