Open AccessLaser Irradiation Effect on the Optical Band Gap of Se96-xTe4Hgx Thin Films
Author(s) -
Adam A Bahishti,
Izhar Uddin,
M. Zulfequar,
Talal Alharbi
Publication year - 2016
Publication title -
journal of modern materials
Language(s) - English
Resource type - Journals
ISSN - 2456-4834
DOI - 10.21467/jmm.1.1.17-23
Subject(s) - irradiation , materials science , band gap , thin film , laser , substrate (aquarium) , optoelectronics , absorption edge , optics , nanotechnology , oceanography , physics , geology , nuclear physics
The effect of laser irradiation on the optical band gap of Se96-xTe4Hgx thin films has been studied. Thin films of thickness 300 nm have been deposited on glass substrate by using thermal evaporation technique. The result shows that irradiation causes a red shift in the absorption edge and hence optical band gap decreases with increasing irradiation time. The results have been analyzed on the basis of laser irradiation-induced defects in the film. Furthermore, optical band gap has found to decrease by increasing mercury concentration and optical band gap decreases rapidly with a higher concentration of mercury.