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

Muthanna Journal of Pure Sciences – MJPS

VOL.(5), NO.(1), 2018

Shymaa K. Hussian^1,*, Thill A. Kadhum Al-musawi¹and Shatha Raheem Helal Al himidi ²

¹Physics Department, Science College, Al-Muthanna University, Iraq.

²Basic medical Science department, Dentistry College, AlMuthanna University, Iraq.

DOI: 10.52113/2/05.01.2018/27-35

Abstract

In this work thin films containing laser dye (DCM) doped with (PVC) were prepared using casting method. Titania (TiO₂) nanoparticles also were synthesized using sol-gel technique. Different titania nanoparticle densities (0.882×10²⁰, 1.765×10²⁰, 2.648×10²⁰ and 3.530×10²⁰ cm^-3) were co-doping with dye doped polymer to study the effect of this addition on the optical properties and electronic transition energy gaps in cases 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 of absorbance at the strong absorption region. It was observed from results that the allowed direct electronic transitions energy gap was decreasing from 2.22 to 2.175e.V with the increasing of titania nanoparticles density and the allowed indirect electronic transition energy gap decreasing from 2.19 to 2.13e.V.

Keywords: Thin films, Cast method, Optical properties, Poly Vinyl chloride(PVC), DCM, TiO₂ nanoparticle.