Optical parameter studies of thermally evaporated As-Se-Sn glassy system

The optical properties of As^sub 30^Se^sub 70-x^Sn^sub x^ with (x = 0, 1, 2 and 3 at Sn %) thin films have been investigated. The films used in these studies were thermally evaporated. The structural characterization revealed that the as-deposited films were amorphous in nature. The spectral and opt...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2006-03, Vol.17 (3), p.193-198
Main Authors: FOUAD, S. S, EL-SHAZLY, E. A. A, BALBOUL, M. R, FAYEK, S. A, EL-BANA, M. S
Format: Article
Language:English
Subjects:
Applied sciences
Constants
Dispersions
Electronics
Evaporation
Exact sciences and technology
Glassy
Materials
Materials science
Mathematical models
Maxima
Studies
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The optical properties of As^sub 30^Se^sub 70-x^Sn^sub x^ with (x = 0, 1, 2 and 3 at Sn %) thin films have been investigated. The films used in these studies were thermally evaporated. The structural characterization revealed that the as-deposited films were amorphous in nature. The spectral and optical parameters have been investigated using spectrophotometric measurements of transmittance in the wavelength range (200-1100 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 the single-oscillator Wemple-Didomenico model. The optical-absorption edge and the optical band gap are calculated from the absorption coefficient values using the non direct transition model proposed by Tauc's extrapolation procedure. The relation between the optical gap and chemical composition in As-Se-Sn glassy system is discussed in terms of the average heat of atomization H^sub s^ and the average coordination number N^sub c^.[PUBLICATION ABSTRACT]
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-006-6760-4