Document Details

Document Type : Article In Journal 
Document Title :
Heat-treatment effect on the structural and optical properties of flash evaporated Sb2 Te3 thin films
Heat-treatment effect on the structural and optical properties of flash evaporated Sb2 Te3 thin films
 
Subject : Physics 
Document Language : English 
Abstract : The effect of thickness and heat treatment on the structural and optical properties of Sb2Te3 thin films fabricated by using flash evaporation technique were investigated. The as-deposited films were found to be stoichiometric. For the as-deposited and annealed samples of thickness in the range of 20.7-120.5 nm, large variations in transmittance and reflectance were observed for wavelength below 2000 nm due to strong absorption, while slight variations were observed above 2000 nm. The optical constants, n and k, measured in the range of 500-4000 nm, increased slightly by annealing the samples at 573 K for 2 h in air and a red shift was observed. Allowed indirect transitions were observed for the as-deposited and the annealed samples. The results showed two energy gaps for these transitions varied from 0.28 to 0.31 eV for the as-deposited samples and from 0.56 to 0.54 eV for the annealed films. The spectral distribution of the real part of the dielectric constant ́ showed a maximum at 0.73 eV for the as-deposited films decreased to 0.65 eV by annealing. © EDP Sciences. 
ISSN : 1286-0042 
Journal Name : EPJ Applied Physics, Volume 44, Issue 1, October 2008, Pages 59-64 
Volume : 44 
Issue Number : 1 
Publishing Year : 2008 AH
2008 AD 
Number Of Pages : 5 
Article Type : Article 
Added Date : Thursday, October 15, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
Soliman, H.SSoliman, H.SResearcherDoctorate 
سعود جميل مصطفى يغمورYaghmour, S.JResearcherDoctoratesyaghmour@kau.edu.sa
Al-Solami, H.GAl-Solami, H.GResearcherDoctorate 

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