Phase relations and optical properties of semiconducting ternary sulfides in the system Cu-Sn-S
Phase relations and optical properties of semiconducting ternary sulfides in the system Cu-Sn-S
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DOI：
10.1016/s0022-3697(03)00172-0
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发表时间：
2003-09-01
影响因子：
4
通讯作者：
Tomm, Y
中科院分区：
文献类型：
--
作者：
Fiechter, S;Martinez, M;Tomm, Y
用差热分析和X射线衍射仪重新研究了Cu2S-SnS2三元体系的相图。发现Cu4SnS4、Cu2SnS3和Cu2Sn3+xS7+2x(0小于或等于x小于或等于1)三个相的熔点分别为833℃、856℃和803℃。椭圆偏振测量和漫反射测量表明，后两种硫化物的基频禁带宽度为0.93 eV，并有较高的跃迁。首次证明了Cu2Sn3S7具有半导体性质，其吸收系数为10(5)cm(-1)量级。(C)2003爱思唯尔有限公司。保留所有权利。
The ternary system Cu-Sn-S was re-investigated and the phase diagram Cu2S-SnS2 studied in detail by differential thermal analysis and X-ray diffractometry. Three phases of composition Cu4SnS4, Cu2SnS3 and Cu2Sn3+xS7+2x(0 less than or equal to x less than or equal to 1) were found exhibiting melting points at 833, 856 and 803 degreesC, respectively. Ellipsometric and diffuse reflectance measurements revealed that the latter two sulfides possess a fundamental band gap of 0.93 eV followed by a higher transitions. For the first time it could be demonstrated that Cu2Sn3S7 has semiconducting properties and an absorption coefficients of the order 10(5) cm(-1). (C) 2003 Elsevier Ltd. All rights reserved.