Preparation and Optical Characterization of Poly (Vinyl Alcohol): Eosin-Y Films Synthesized bySolventCasting Method

Abstract

It was found that the effect of PVA-doped Eosin-Y on the optical properties of the composite films was intentional as the PVA films were deposited by a solvent casting process with a thickness of 25 ± 1 μm and were grafted with different absorptions of Eosin-Y. The optical diffusivity (%) was described within the wavelength range of (200-900 nm), as well as the effect of the doping ratio on the optical properties of the prepared films. The results showed that layers with indirect developments are acceptablein the interband that are affected by the doping ratio. The band gap of the doped films decreased to (2.20 eV), (2.17 eV), and (2.13 eV)for doping ratios of (2%, 4%, and 6%), respectively, compared to the pure film's 3.89 eV