Preparation, transport properties, and electronic structure of quaternary sulfides based on tetrahedral [MS4]4- units:: SrCu2MS4 (M=Ge, Sn)

被引：15

作者：

Llanos, J ^{[1
]}

Mujica, C ^{[1
]}

Buljan, A ^{[1
]}

机构：

[1] Univ Catolica Norte, Fac Ciencias, Dept Quim, Casilla 1280, Antofagasta, Chile

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 316卷 / 1-2期

关键词：

chalcogenides; semiconductors; electrical properties; electronic structure; optical properties;

D O I：

10.1016/S0925-8388(00)01452-3

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：

The electrical and optical properties of the trigonal phases SrCu2GeS4 and SrCu2SnS4 were studied by means of electrical conductivity and diffuse reflectance spectra in the W-Vis range. The compounds exhibit a room temperature conductivity of 8.96><10(-4) S cm(-1) for SrCu2GeS4 and 5.01x10(-1) S cm(-1) for SrCu2SnS4. The optical bandgaps were assessed at 2.9 and 2.1 eV, respectively. Electronic structure and bonding relationships were analyzed by means of extended Huckel tight-binding calculations. Based on the experimental results as well as the electronic structure calculations, both phases are classified as semiconductor materials. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：146 / 152

页数：7

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