Document Details

Document Type : Article In Journal 
Document Title :
Effects of laser irradiation on optical properties of amorphous and annealed Ga15Se81In4 and Ga15Se 79In6 chalcogenide thin films
Effects of laser irradiation on optical properties of amorphous and annealed Ga15Se81In4 and Ga15Se 79In6 chalcogenide thin films
 
Subject : Physics 
Document Language : English 
Abstract : Amorphous thin films of Ga15Se81In4 and Ga15Se79In6 glassy alloys with thickness 3000 were prepared by thermal evaporation onto chemically cleaned glass substrates. The changes in optical properties due to the influence of laser radiation on amorphous and thermally annealed thin films of Ga15Se 81In4 and Ga15Se79In6 were calculated from absorbance and reflectance spectra as a function of photon energy in the wave length region 400-1000 nm. Analysis of the optical absorption data shows that the rule of non-direct transitions predominates. The optical band gaps observed to decrease with the increase of annealing temperatures. Furthermore, exposing thin films to laser irradiation leads to a decrease in optical band gap, absorption coefficient, refractive index and extinction coefficient for both as-prepared and annealed films. The decrease in the optical band gap is explained on the basis of change in nature of films, from amorphous to polycrystalline state, with the increase of annealing temperature and by laser irradiation for 10 min exposure time. Outcomes of our study confirm that this system may be used for photovoltaic devices. 
ISSN : 0925-8388 
Journal Name : Journal of Alloys and Compounds 
Volume : 505 
Issue Number : 1 
Publishing Year : 1431 AH
2010 AD 
Article Type : Article 
Added Date : Sunday, October 9, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
أحمد عبدالله الغامديAl-Ghamdi, A AResearcherDoctorateAGAMDI@kau.edu.sa
شمشاد أحمد خانKhan, Shamshad AhmedResearcherDoctorateshamshad_phys@yahoo.com
صالح هديهد الحنيطيAl-Heniti, Saleh HResearcherDoctoratesalheniti@kau.edu.sa
فيصل عبدالعزيز العقلAl-Agel, Faisal AResearcherDoctoratefagel@kau.edu.sa
طلال صدقة الحربيAl-Harbi, Talal SResearcherDoctoratetharbi1@yahoo.com
Mohd ZulfequarZulfequar, Mohd ResearcherDoctorate 

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