Dispersion parameters of cadmium chloride doped PVA-PVP blend films

Solution cast films of poly vinylalcohol (PVA) - poly vinylpyrrolidone (PVP) polymer blend, doped with different concentrations (from 0.5 wt% up to 40 wt%) of cadmium chloride (CdCl2) have been studied by analysing the data recorded using optical (UV-Vis) spectrometry. The modified band structure of PVA -PVP blends doped with CdCl2 has been studied using Moss model and Wemple - DiDomenco model. Optical parameters such as transmittance (T), reflectance (R), refractive index (n), average oscillator energy (E-0), oscillator dispersion energy (E-d), real and imaginary part of dielectric constant (epsilon(r) and epsilon(i)) have been determined. The ratio of charge carrier concentration to effective mass (N/m*), plasma frequency (omega(p)), average oscillator wavelength (lambda(o)), oscillator strength (S-o), optical conductivity (sigma) and optical momenta of spectra (M-1 and M-3) have been estimated for the PVA-PVP blend films doped with CdCl2.