Study of Gamma irradiation effect on the Optical Properties of Bromocresol Green Dye Doped Poly Methyl Methacrylate Thin Films
Keywords:
Thin films, Optical properties, Gamma ray.Abstract
In this paper, we investigated the effect of the gamma irradiation on the optical
properties and energy band gap of PMMA doped by BCG dye thin films. Films of Poly Methyl
Methacrylate doped by 20% BCG doping ratio to prepared concentrations 1x10-3 M were
deposited on glass substrate using free casting method at room temperature. The optical
properties of the films were determined using UV-Visible absorbance and transmittance spectra at
the 300 - 800 nm wavelength range. The linear absorption coefficient, the extinction coefficient,
and the optical and electrical conductivity were calculated in addition to the energy band gap.
The results showed that the optical properties were increasing by increasing the dose irradiation,
while the optical energy gap was decreasing with the increasing dose irradiation.