Polymeric thin films of Polystyrene (PS) doped with DCM laser dye have been prepared using casting method and pure thin films of PS. Optical properties for deposed thin films on glass substrate with 0.237μm was prepared using casting method involved absorptions spectra measurement using UV mate SP-8001 double-beam spectrophotometer covering the wavelengths range 190-1100nm, where the absorption coefficient was calculated and the direct energy gap was 3.9eV for PS thin film, energy gap for PS-DCM thin film was 2.2eV. While for indirect transitions the energy gap for PS thin film was 2.25eV and phonon energy was 0.55eV, but the energy gap for PS-DCM film was 1.4eV and phonon energy was 0.5eV.
International Letters of Chemistry, Physics and Astronomy (Volume 61)
A. N. Mohamed "Studying the Optical Properties of Thin Films Prepared from Polystyrene Doped with DCM Dye", International Letters of Chemistry, Physics and Astronomy, Vol. 61, pp. 178-183, 2015