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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Optical band gap and optical constants in amorphous Se96-xTe4Agx thin films
Optical band gap and optical constants in amorphous Se96-xTe4Agx thin films
Subject
:
Physics
Document Language
:
English
Abstract
:
The optical constants (absorption coefficient (α), refractive index (n), extinction coefficient (k), real and imaginary part of dielectric constant) have been studied for a-Se96-xTe4Ag x (where x=0, 4, 8, 12) thin films as a function of photon energy in the wavelength range (500-1000 nm). It has been found that the optical band gap increases while n and k decreases on incorporation of Ag in Se-Te system. The value of α and k increases, while the value of n decreases with incident photon energy. The results are interpreted in terms of the change in concentration of localized states due to the shift in fermi level. A correlation between the optical band gap and electronegativity of the alloys indicates that the optical band gap increases with the decrease of electronegativity.
ISSN
:
0042-207X
Journal Name
:
Vacuum
Volume
:
80
Issue Number
:
5
Publishing Year
:
1427 AH
2006 AD
Article Type
:
Article
Added Date
:
Saturday, December 31, 2011
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
أحمد عبدالله الغامدي
Al-Ghamdi, Ahmad A
Researcher
Doctorate
AGAMDI@kau.edu.sa
Files
File Name
Type
Description
31860.pdf
pdf
Abstract
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