Effect of Adding Coumarin Dye on Optical Properties of PolyCarbonate Films


Pure and doped polycarbonate (PC) films with various doping ratio of coumarin dye were prepared by using casting method. The absorption and transmission spectra for these films were measured using UV/VIS spectrophotometer technique in order to assessment the type of transition which was found to be indirect transition. The optical energy gap of polycarbonate (PC) was (4.24eV) and coumarin dye was (4.08eV), after doping PC polymer with coumarin dye the maximum energy gap is(4.26eV) in volume ratio(4ml). Also, the results showed that absorption coefficient, refractive index, extinction coefficient and real- imaginary part of conductivity slightly affects by doping