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Dispersion Parameters, Optical Constant and Photoluminescence of Poly Vinyl Alcohol Grafted Eosin –Y Dye (PVA-g-Ei) | ||
| Journal of Basrah Researches (Sciences) | ||
| Article 1, Volume 36, Issue 3, 2010, Pages 8-16 PDF (0 K) | ||
| Abstract | ||
| Optical properties of PVA-g-Ei thin film prepared by cast method have been studied in spectral range of (200-900 nm) .The dispersion of the refractive index is discussed in term of Wlemple - DiDomenico single oscillator model , many dispersion parameters such as single oscillator energy (Eo ), dispersion energy ( Ed ), refractive index ( n(0) ), discussed using Miller’s rule ,the optical absorption at the fundamental absorption edge dielectric constant ( ) ,moment of the dielectric constant optical spectrum( M-1 ,M-3 )and energy gap by Wimple-DiDomenico approximation ( )have been calculated,non linear optical susceptibility ( ) has been discussed , direct energy gap by Tauc relation ( ), energy gap by absorption spectrum ( ) and Urbach energy of the localized states (Eu ) were also calculated . Photoluminescence spectrum of investigated PVA-g-Ei thin film has been recorded in spectral range of (500-700 nm) , photoluminescence quantum yield(PL) and the energy gap at the absorption peak ( ) have been also determined . | ||
| Keywords | ||
| Hashim M; Jabbar; Eman M; Jaboori and Ali Q; Abdullah | ||
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