Authors : Ban Salam Abdalhadi, Lazem Hassan Aboud and Nizar Salim Shnan
Abstract: In this study has been studied the effect of the conducting polymer (Polyaniline) on the optical properties of laser dyes. Studied three different concentrations (1*10–3, 5*10–4, 1*10–4) of dissolved fluorescein sodium dye in distilled water. Absorption and fluorescence spectra, absorption and refraction coefficients, Quantum efficiency (QFM) and fluorescence lifetime (ιf) values were studied for these three concentrations. After that, (3 mL) of polyanylene was added to the dye solution and the polymer effect was studied on the optical properties of the dye. The results showed a decrease in absorbance values with a shift towards the short wavelengths (blue shift) of the absorption spectra of the dye solution and thus, a decrease in the values of refractive and absorption coefficients, a decrease in the fluorescence intensity and the quantum efficiency and an increase in the fluorescence lifetime of with a shift towards the short wavelengths (Blue shift) due to the effect of the molecular electrical band (HOMO and LUMO) of the conducting polymer on the electrical energy levels of dye molecule.
Ban Salam Abdalhadi, Lazem Hassan Aboud and Nizar Salim Shnan, 2019. Study of the Effect of Conducting Polymer on the Optical Properties of Laser Dyes. Journal of Engineering and Applied Sciences, 14: 5479-5482.