The role of Cd0.9Mg0.1S nanofillers on the structural, optical, and dielectric properties of PVA/CMC polymeric blend

Highlights: • Cd_0.9Mg_0.1S filled PVA/CMC blend was prepared by thermolysis and casting techniques. • X-ray diffraction and Fourier transform infrared have been performed. • The optical and dielectric properties of the polymeric blend have been explored. • The energy bandgap has been tuned from 5.40 eV to 5.02 eV via doping process. • CdS/Mg filled PVA/CMC blend films are recommended for optoelectronic applications. In this work, the role of Cd_0.9Mg_0.1S (CdS/Mg) nanofillers on the structural, optical, and dielectric properties of polyvinyl alcohol/carboxymethyl cellulose (PVA/CMC) blend has been explored. CdS/Mg nanoparticles filled PVA/CMC blend was prepared using thermolysis and casting techniques. The formation of a single phase Cd_0.9Mg_0.1S and the insertion of the nano powder inside the blend matrix were examined by X-ray diffraction (XRD) and Fourier transform infrared (FTIR). The morphology of the samples and confirmation of the homogeneity of the formed blends were probed utilizing scanning electron microscope (SEM) and energy dispersive spectrometry (EDS). Doping amount effect on the absorbance, transmittance spectra, optical band gap and the refractive index was investigated using UV–vis spectroscopy technique. The resulting changes in the different optical parameters such as the average oscillator strength, the single oscillator energy, the dispersion energy, the residual dielectric constant were also explored. The complex impedance technique was employed to trace the influence of doping on the real and imaginary dielectric parts as a function of frequency was examined. The modified properties nominate CdS/Mg filled PVA/CMC blend films for optoelectronic applications.