Enhancing the linear and nonlinear optical properties by ZnS/V-doped polyvinyl alcohol/carboxymethyl cellulose/polyethylene glycol polymeric nanocomposites for optoelectronic applications

Abstract

Vanadium-doped nano zinc sulfide (ZnS/V) was formed using solid state reaction method at low temperature. Polyvinyl alcohol (PVA)/carboxymethyl cellulose (CMC)/polyethylene glycol (PEG) films composed with different content of ZnS/V nanoparticles (0, 1, 3, 5, 10 wt%) were produced using casting technique. The structural feature of ZnS/V nanoparticles was examined using Rietveld method. The structure and optical characteristics of the filled PVA/CMC/PEG blended polymers were investigated applying X-ray diffraction, Fourier transform infrared, fluorescence, energy dispersive X-ray analysis, scanning electron microscope and diffused reflectance techniques. The investigated results indicated that the optical parameters including the refractive index and nonlinear optics of the blended polymer exhibited a considerable improvement by loading nano ZnS/V. The direct and indirect optical bandgaps could be tailored between (5.63, 5.28) eV for the pure blend and (3.64, 2.77) eV for blended polymer doped with10% ZnS/V. Broad FL spectra were obtained for all blended polymers with FL intensity greatly affected with ZnS/V nanoparticles while the FL peaks are shifted a little. These results indicate the possibility of applying the samples under the study in several potential optoelectronic applications.