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Preparation and study of optical properties of pure and yellow methyl -doped polyvinyl alcohol (pva) films

Author: 
Ziad T. Khodair
Subject Area: 
Physical Sciences and Engineering
Abstract: 

In this study samples of pure polyvinyl alcohol (PVA) and polyvinyl alcohol films doped with methyl yellow with percentage doping of (0, 2, and 4 %) have been prepared by using solvent casting method. The optical properties, absorption and transmission of films were investigated through the transmission measurements at room temperature in wavelength range of (190-1100 nm). The films show indirect allowed transitions that influenced by the doping, the optical energy gap has been decreased from about (5.732 eV) before doping to about (4.821 eV) and (3.819 eV) after doping. Optical constants like refractive index, extinction coefficient calculated and correlated with doping.

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