CuAl1-xInxSe2 solid solutions: Dielectric function and inter-band optical transitions

被引：9

作者：

Shim, YongGu ^{[1
]}

Hasegawa, Kouji ^{[1
]}

Wakita, Kazuki ^{[2
]}

Mamedov, Nazim ^{[3
]}

机构：

[1] Osaka Prefecture Univ, Grad Sch Engn, Dept Phys & Elect, Osaka 5998531, Japan

[2] Chiba Inst Technol, Chiba 2750016, Japan

[3] Natl Acad Sci Azerbaijan, Inst Phys, AZ-1143 Baku, Azerbaijan

来源：

THIN SOLID FILMS | 2008年 / 517卷 / 04期

关键词：

Chalcopyrite; Dielectric function; Ellipsometry; Band structure;

D O I：

10.1016/j.tsf.2008.09.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dielectric function of bulk CuAl1-xInxSe2 with composition x varying from x=0.07 to x=0.6 were studied over the photon energy region 1.0-6.0 eV at room temperature by spectroscopic ellipsometry. Information on the inter-band optical transitions was obtained from the results of the standard critical point analysis of the obtained dielectric function. With increasing Indium content, all spectral features of the obtained dielectric functions were found to gradually shift towards lower energies. The details of this shift for each critical point retrieved from the obtained dielectric function were disclosed. A compositional dependence of the optical transitions in F point of the Brillouin zone was verified to be strong. Such dependence for N and T points turned out to be weak by comparison. The later fact was accounted for a small compositional shift of the conduction band states in N and T points as compared to Gamma point. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：1442 / 1444

页数：3

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