Dispersion Parameters of Polyvinyl Alcohol Films doped with
Fe

Polyvinyl alcohol polymer was dissolved in water in order to prepare films with
different concentration of Fe utilizing casting method. The optical properties were obtained by
recording the transmittance spectrum in the wavelength range (300-900) nm. The dispersion
parameters were calculated using the Wemple–DiDomenico method. Dispersion energy (Ed)
and the single oscillator energy of electronic transition (Eo) were decreased with the increasing
of Fe content in the PVA-Fe films. While Urbach energy was increased. The energy gap
decreased from 4.08 eV to 3.52 eV for PVA: 4% Fe film.