Structural, Electrical and Optical Properties for (Polyvinyl Alcohol–Polyethylene Oxide–Magnesium Oxide) Nanocomposites for Optoelectronics Applications

Abstract

Preparation of polyvinyl alcohol (PVA)–polyethylene oxide (PEO)–magnesium oxide (MgO) nanocomposites and studying their structural, AC electrical and optical properties for dielectric and optoelectronic applications have been investigated. The nanocomposites have been fabricated with different concentrations of (PVA–PEO) blend and MgO nanoparticles. The experimental results showed that the dielectric constant, dielectric loss and AC electrical conductivity of (PVA–PEO) blend are increased with the increase in MgO nanoparticles concentrations. The dielectric constant and dielectric loss of (PVA–PEO) blend are decreased while the AC electrical conductivity increases with the increase in frequency. The optical measurements are showed that the absorbance of (PVA–PEO–MgO) nanocomposites is increased with increasing of the magnesium oxide nanoparticles concentrations. The indirect energy gap (Eg) of (PVA–PEO) blend decreases with an increase inconcentrations of magnesium oxide nanoparticles. The optical constants as absorption coefficient, extinction coefficient, refractive index, real and imaginary dielectric constants of nanocomposites are variation with increasing of the magnesium oxide nanoparticles weight percentages.