The Effects of Additive TiO2 Nanoparticles on the Optical properties of DCM Doped with PVC Thin Films


In this work thin films containing laser dye (DCM) doped with (PVC) were prepared using castingmethod. Titania (TiO2) nanoparticles also were synthesized using sol-gel technique. Different titaniananoparticle densities (0.882×1020, 1.765×1020, 2.648×1020 and 3.530×1020 cm-3) were co-doping with dye dopedpolymer to study the effect of this addition on the optical properties and electronic transition energy gaps incases of both direct and indirect transitions, Absorbance spectra were measured using Spectrophotometer.Absorption and extinction coefficients as well as the refractive indices have been obtained the spectra ofabsorbance at the strong absorption region. It was observed from results that the allowed direct electronictransitions energy gap was decreasing from 2.22 to 2.175e.V with the increasing of titania nanoparticles densityand the allowed indirect electronic transition energy gap decreasing from 2.19 to 2.13e.V.