OPTICAL PARAMETERS OF POLYVINYL ALCOHOL-MOLYBDENUM OXIDE COMPOSITE FILMS

Mohamed HAMZA¹ , Abduelmajid NAJJAR²

Polyvinyl alcohol-molybdenum oxide (PVA-MoO3) composite films were prepared by solution casting technique. The weight percentages of the oxide in the films were 2.5% and 5%. The films were characterized by using a computerized double beam UV-VIS spectrophotometer. Optical parameters of the composite films such as real (n) and imaginary (k) parts of refractive index, optical conductivity and dielectric constant were calculated. Other optical parameters (the oscillator energy (E0) and dispersion energy (Ed)) have been also evaluated. The obtained results revealed that doping of MoO3 had a significant effect on the optical properties. The results showed that the increased ratio of the oxide led to an increase in the calculated values of the PVA film parameters and shifted toward high wavelength. The addition of 5.0% of MoO3 to PVA film raised the refractive index (n) value by 38.5%. The Results of this study show that the PVA-MoO3 film can have many applications, especially in the area of antireflective coating and photonic devices.

Keywords
Nanocomposite, Optical Parameters, Polyvinyl Alcohol, Molybdenum Oxide, Refractive Index,