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Faculty of Science and Arts - Khulais
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 Type
Dr Grade
Email
كمال عبدالنبي علي
Ali, Kmal Abdualnabi
Researcher
Doctorate
Files
File Name
Type
Description
28367.pdf
pdf
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