Document Details

Document Type : Article In Journal 
Document Title :
Optical constants of thermally evaporated Se–Sb–Te films using only their transmission spectra
لثوابت الضوئية لأغشية رقيقة محضرة بالتبخير الحرارى ل سيلينيوم - أنتيمون - تيليريوم باستخدام قياسات النفاذية فقط
 
Subject : Optical properties by using only transmittance 
Document Language : English 
Abstract : Amorphous Se82−xTe18Sbx thin films with different compositions (x = 0, 3, 6 and 9 at.%) were deposited onto glass substrates by thermal evaporation. The transmission spectra, T(), of the films at normal incidence were obtained in the spectral region from 400 to 2500 nm. Based on the use of the maxima and minima of the interference fringes, a straightforward analysis proposed by Swanepoel has been applied to derive the optical constants and the film thickness. The dispersion of the refractive index is discussed in terms of the single-oscillatorWemple and DiDomenico model. Tauc relation for the allowed non-direct transition describes the optical transition in the studied films. With increasing antimony content the refractive index increases while the optical band gap decreases. The optical band gap decreases from 1.62 to 1.26 eV with increasing antimony content from 0 to 9 at.%. The chemical-bond approach has been applied successfully to interpret the decrease of the optical gap with increasing antimony content. 
ISSN : 08-035 
Journal Name : Materials Chemistry and Physics 
Volume : 113 
Issue Number : 113 
Publishing Year : 1430 AH
2009 AD 
Article Type : Article 
Added Date : Wednesday, December 29, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
كمال عبدالنبي عليAli, Kmal AbdualnabiResearcherDoctorate 

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