Vol. 4, Issue 3 (2019)
Optical energy gap and optical constants of poly (Methyl methacrylate) films doped with ZnCl2
Author(s): Ali Taher Mohi
Abstract: In the present work, we have studied the effect of ZnCl2 dopant on the optical properties of (polymethyl methacrylate) (PMMA) polymer. Pure and ZnCl2 doped PMMA films were prepared using solvent casting method. Optical energy band gap Eg was estimated by using UV-VI-NIR spectra and it was classified as an indirect allowed transition. In general, Eg was found to decrease with the increasing of dopant concentration. The refractive indices of the samples were measured and it was found to increase with the increasing of dopant concentration. Optical transmittance, reflectance and extinction coefficient were also investigated and correlated with the action of doping process.
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