Main Page
About Science
Faculty Deanship
Letter of Dean
Overview of Deanship
Vice Deans
Vice Dean
Letter of Vice-dean
Overview of Vice-deanship
Vice Dean for Graduate Studies
Letter of Vice Dean for Graduate Studies
Overview of Vice Dean of Postgraduate Studies
Research and Innovation Unit
Vice Dean for Girls Campus
Faculty Management
Letter of Managing Director-Boys Campus
Letter of Managing Director-Girls Campus
Overview of Management
Educational Affairs
Males Campus
Staff
Females Campus
Contact Us
Research
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Laser-induced changes on optical band gap of amorphous and crystallized thin films of Se75S25-xAGx
Laser-induced changes on optical band gap of amorphous and crystallized thin films of Se75S25-xAGx
Subject
:
Physics
Document Language
:
English
Abstract
:
Optical band gap of amorphous, crystallized, laser induced amorphous and laser induced crystallized films of Se75S25-xAgx (x=4, 6 and 8) glassy alloys was studied from absorption spectra. The amorphous and crystallized films were induced by pulse laser for 10 min. After laser irradiation on amorphous and crystalline films, optical band gap was measured. It has been found that the mechanism of the optical absorption follows the rule of indirect transition. The amorphous thin films show an increase in the optical band gap, while the crystallized (thermally annealed) thin films show a decrease in the optical band gap by inducing laser irradiation. Crystallization and amorphization of chalcogenide films were accompanied with the change in the optical band gap. The change in optical energy gap could be determined by identification of the transformed phase. These results are interpreted in terms of concentration of localized states due to shift in Fermi level.
ISSN
:
0921-4526
Journal Name
:
Physica B: Condensed Matter
Volume
:
404
Issue Number
:
21
Publishing Year
:
1430 AH
2009 AD
Article Type
:
Article
Added Date
:
Wednesday, December 21, 2011
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
أحمد عبدالله الغامدي
Al-Ghamdi, Ahmad A
Researcher
Doctorate
AGAMDI@kau.edu.sa
شمشاد أحمد خان
Khan, Shamshad Ahmed
Researcher
Doctorate
shamshad_phys@yahoo.com
Files
File Name
Type
Description
31710.pdf
pdf
Abstract
Back To Researches Page