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Document Details
Document Type
:
Article In Journal
Document Title
:
Optical characterization of nanocrystalline Se85 Te10 Pb5 and Se80 Te10 Pb10 chalcogenides
Optical characterization of nanocrystalline Se85 Te10 Pb5 and Se80 Te10 Pb10 chalcogenides
Subject
:
Physics
Document Language
:
English
Abstract
:
Measurements of optical constants have been made on alloyed samples of Se and Te with Pb prepared under vacuum by diffusion methods. The polycrystalline Se85Te10Pb5 and Se80Te10Pb10 chalcogenides were used as a starting material for the milling process. The milled materials were characterized by TEM and optical measurements in a wavelength region of 400-1000 nm. The experimental result shows that the optical absorption follows the rules of direct transition. TEM measurements showed that after 60 h of milling, nanoparticles with a typical diameter of about 5 to 20 nm were developed. The optical band gap and optical constants of the milled materials in thin film form have been studied as a function of photon energy. It has been observed that the absorption coefficient, optical band gap and extinction coefficient increases while the refractive index decreases with an increase in milling time. The results have been analyzed on the basis of milling time.
ISSN
:
0749-6036
Journal Name
:
Superlattices and Microstructures
Volume
:
47
Issue Number
:
6
Publishing Year
:
1431 AH
2010 AD
Article Type
:
Article
Added Date
:
Monday, November 14, 2011
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
شمشاد أحمد خان
Khan, Shamshad Ahmed
Researcher
Doctorate
shamshad_phys@yahoo.com
فيصل عبدالعزيز العقل
Al-Agel, Faisal A
Researcher
Doctorate
fagel@kau.edu.sa
أحمد عبدالله الغامدي
Al-Ghamdi, Ahmad A
Researcher
Doctorate
AGAMDI@kau.edu.sa
Files
File Name
Type
Description
31244.pdf
pdf
Abstract
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