OPTICAL PARAMETERS OF POLYVINYL ALCOHOL-MOLYBDENUM OXIDE COMPOSITE FILMS

Year 2018, Volume: 13 Issue: 4, 46 - 54, 13.10.2018

Mohamde Mamza Abduelmajid Najjar

Abstract

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 (E_d)) 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

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