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 TypeDr GradeEmail
أحمد عبدالله الغامديAl-Ghamdi, Ahmad AResearcherDoctorateAGAMDI@kau.edu.sa

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