Optical properties of new chalcogenide glasses from the GeSe2-Sb2Se3-PbSe system

被引：20
|
作者：
Parvanov, Svedin [1 ]
Vassilev, Venceslav [2 ]
Tomova, Katerina [2 ]
机构：
[1] Univ Chem Technol & Met, Cent Res Lab, Sofia 1756, Bulgaria
[2] Univ Chem Technol & Met, Dept Semicond, Sofia 1756, Bulgaria
来源：
MATERIALS LETTERS | 2008年 / 62卷 / 12-13期
关键词：
chalcogenide glasses; optical materials and properties; semiconductors; thin films;
D O I：
10.1016/j.matlet.2007.11.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Optical properties of thin films in the GeSe2-Sb2Se3-PbSe system are studied as a function of the PbSe content and at different ratio GeSe2/Sb2Se3. Transmission spectra of thin films are investigated. From the above spectra the absorption coefficient CL for different PbSe content are derived. The increase of the absorption coefficient alpha is attributed to the increase of the current carriers density in the valence band. Optical band gap of the samples is determined using Tauc's procedure. A correlation between the optical band gap and the composition of these chalcogenide samples could be seen. This might result from the increasingly stronger metal character of the bond that leads to the formation of a complicated band gap structure. (c) 2008 Elsevier B.V. All fights reserved.
引用
收藏
页码：2021 / 2024
页数：4
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