Structural and optical properties of SeGe and SeGeX (X = In, Sb and Bi) amorphous films

被引：81

作者：

Fadel, M. ^{[1
]}

Fayek, S. A. ^{[2
]}

Abou-Helal, M. O. ^{[3
]}

Ibrahim, M. M. ^{[2
]}

Shakra, A. M. ^{[1
]}

机构：

[1] Ain Shams Univ, Fac Educ, Dept Phys, Semicond Lab, Cairo 02, Egypt

[2] Natl Ctr Radiat Res & Technol, Cairo, Egypt

[3] Natl Res Ctr, Solid State Phys Dept, Cairo, Egypt

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 485卷 / 1-2期

关键词：

Chalcogenide glasses; Structure; Optical properties; CHALCOGENIDE GLASSES; PHYSICAL-PROPERTIES; TRANSPORT-PROPERTIES; THICKNESS; CONSTANTS;

D O I：

10.1016/j.jallcom.2009.06.057

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 optical properties of Se0.62Ge0.38 and Se0.62Ge0.35X0.03 where [X = In. Sb and Bi] thin films has been investigated Thin films used in these studies were thermally evaporated on glass substrates. The structural characterization revealed that the as-deposited films were amorphous in nature. The chemical composition of the films has been checked using energy dispersive X-ray spectroscopy (EDX). The spectral distribution and optical parameters have been investigated using spectrophotometric measurements of transmittance and reflectance in the wavelength range (400-2500 nm). The optical constants were determined from the interference maxima and minima using the Swanepole method. The dispersion of the refractive index is discussed in terms of Wemple-Didomenico single oscillator model. The analysis of the optical absorption data indicates the existence of allowed indirect transitions. The optical dispersion parameters E-0 and F-d were determined according to the above-mentioned model. The optical constants such as optical band gap E-g(opt), complex dielectric constant and dissipation factor tan 6 were determined. 0 2009 Elsevier B.V All rights reserved.

引用

页码：604 / 609

页数：6

共 39 条

[1] Preparation and properties of Ge-Ga-S glasses for laser hosts [J].