Hameed Abdul-Allah, M., Fadhil Habubi, N., Salman Chiad, S. (2012). Determination the dispersion parameters and urbach tail of iron chromate doped PMMA films. , 10(17), 12-17.
Muhammad Hameed Abdul-Allah; Nadir Fadhil Habubi; Sami Salman Chiad. "Determination the dispersion parameters and urbach tail of iron chromate doped PMMA films". , 10, 17, 2012, 12-17.
Hameed Abdul-Allah, M., Fadhil Habubi, N., Salman Chiad, S. (2012). 'Determination the dispersion parameters and urbach tail of iron chromate doped PMMA films', , 10(17), pp. 12-17.
Hameed Abdul-Allah, M., Fadhil Habubi, N., Salman Chiad, S. Determination the dispersion parameters and urbach tail of iron chromate doped PMMA films. , 2012; 10(17): 12-17.

Determination the dispersion parameters and urbach tail of iron chromate doped PMMA films

Iraqi Journal of Physics
Article 1, Volume 10, Issue 17, 2012, Pages 12-17
Authors
Muhammad Hameed Abdul-Allah; Nadir Fadhil Habubi; Sami Salman Chiad
Abstract
Films of pure Poly (methyl methacrylate) PMMA and Iron chromate doped PMMA have been prepared using casting method. Transmission and absorptance spectra have been recorded in the wavelength range (300-900) nm, in order to calculate, single oscillator energy, dispersion energy proposed by Wemple - DiDomenico model, average oscillator strength, average oscillator wavelength. The refractive index data at infinite wavelength which was found to obey single oscillator model which was found to increase from 2.27-2.56 as the doping percentage increase. The decreasing in the optical energy gap which was found according to Tauc model were (3.74-3.63) eV , is in good agreement with that obtained by wimple-DiDomenico model. The inverse behavior compared with the value of the energy gap were obtained for Urbach energies by increasing from (266-308) meV upon doping.
Keywords
PMMA; Optical Properties; Casting Method; Doping Effect
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