Document Details

Document Type : Article In Journal 
Document Title :
Influence of heat treatment on the optical properties and structure of Ge20Te80 films
تأثير المعالجة الحرارية على الخصائص الضوئية والتركيب لأفلام جرمانيوم ﺘﻠﻴﺭﻴﻭﻡ
 
Subject : physics 
Document Language : English 
Abstract : Ge20Te80 films were thermally evaporated onto ultrasonically cleaned glass substrates kept at room temperature. The as-deposited films showed an amorphous structure. An X-ray technique, a scanning electron microscope, and a transmission electron microscope were used to follow up the structural transformations that resulted from heat treatment. From the spectral dependence of the absorption coefficient, a direct electronic transition was mainly responsible for the photon absorption inside the films. The optical data indicated that the width of the localized states’ tails increases while the optical gap decreases with an increase of the annealing temperature of the investigated films. The optical results have been interpreted on the basis of amorphous–crystalline transformations. 
ISSN : 09478396 
Journal Name : Applied Physics A 
Volume : 78 
Issue Number : 4 
Publishing Year : 1426 AH
2004 AD 
Article Type : Article 
Added Date : Tuesday, December 28, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
فريد محمد عبدالرحيمAbdel-Rahim, Farid MohammadResearcherDoctoratefarid.elkhateb@gmail.com

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