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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
A study on photo-induced crystallization in Ga10Se78Tl12 thin films
A study on photo-induced crystallization in Ga10Se78Tl12 thin films
Subject
:
physics
Document Language
:
English
Abstract
:
This paper reports the photo-induced crystallization in glassy Ga10Se78Tl12 thin films. The glassy nature of the bulk material was confirmed by non-isothermal differential scanning calorimetry measurements. The photo-induced crystallization in Ga10Se78Tl12 films was done by exposing to light (using 2000 W tungsten lamp) at various illumination times under the fixed ambient temperature at 358 K. Virgin and photo-induced Ga10Se78Tl1 thin films were characterized by X-rays diffraction, scanning electron microscopy, optical and electrical measurements. The photo-induced crystallization is associated to the change in structure of Ga10Se78Tl12 thin films which initiated the significant change in the optical constants. The detailed examination of the optical absorption results indicated that the optical transition was indirect. The optical band gap of Ga10Se78Tl12 thin films were decreased while the absorption and the extinction coefficients increased with the increase of illumination time. From dark conductivity results, the dark conductivities of thin films continuously heightened and the activation energy turned to be lower as increasing the illumination time. The lowering in optical band gap and activation energy might be due to the occurrence of photo crystallization with the increment of illumination time.
ISSN
:
0957-4522
Journal Name
:
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume
:
26
Issue Number
:
8
Publishing Year
:
1435 AH
2015 AD
Article Type
:
Article
Added Date
:
Sunday, August 20, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
R.P Tripathi
Tripathi, r.P
Investigator
Doctorate
M.S Akhtar
Akhtar, M.S
Researcher
Doctorate
M. A Alvi
Alvi, M. A
Researcher
Doctorate
S Khan
Khan, S
Researcher
shamshad_phys@yahoo.com
Files
File Name
Type
Description
42693.pdf
pdf
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