Study the Effect of Copper Chloride II (CuCl2) on Optical Properties of Polyvinyl Alcohol (PVA)

The optical properties of polyvinyl alcohol (PVA) doped with copper chloride II (CuCl2) were studied. The copper chloride was added to polyvinyl alcohol with different concentrations (0, 1, 3, 5, 7, and 12 wt.%). The PVA:CuCl2 films were prepared using the casting techniques. The absorption and transmission spectra have been recorded in the wavelength range (300-800) nm by using UV-VIS spectrophotometer. The fundamental optical parameters such as optical band gap energy, refractive index, extinction coefficient, and dielectric constants have been investigated. Results show that by adding copper chloride to PVA, the optical parameters (refractive index, extinction coefficient, real and imaginary dielectric constant) are increasing with the increase of concentrations of CuCl2 While the optical band gap energy decreases. The single oscillation energy E0 and the dispersion energy Ed were determined by using the Wemple-DiDomenico model. The results show that E0 and Ed values increase with increasing the dopant CuCl2 concentration.