Open AccessOptical Characteristics of CdSSe Films Prepared by Thermal Evaporation Technique
Author(s) -
Zaidunn T. Mohammed Noori
Publication year - 2011
Publication title -
mağallaẗ baġdād li-l-ʿulūm
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.167
H-Index - 6
eISSN - 2411-7986
pISSN - 2078-8665
DOI - 10.21123/bsj.8.1.155-160
Subject(s) - refractive index , band gap , materials science , molar absorptivity , transmittance , thin film , optics , dielectric , annealing (glass) , evaporation , analytical chemistry (journal) , attenuation coefficient , optoelectronics , chemistry , composite material , nanotechnology , physics , chromatography , thermodynamics
Thin films of cadmium sulphoselenide (CdSSe) have been prepared by a thermal evaporation method on glass substrate, and with pressure of 4x10-5 mbar. The optical constants such as (refractive index n, dielectric constant ?i,r and Extinction coefficient ?) of the deposition films were obtained from the analysis of the experimental recorded transmittance spectral data. The optical band gap of (CdSSe) films is calculate from (?h?)2 vs. photon energy curve. CdSSe films have a direct energy gap, and the values of the energy gap were found to increase when increasing annealing temperature. The band gap of the films varies from 1.68 – 2.39 eV.