Boosting of structural, optical, and dielectric properties of PVA/CMC polymer blend using SrTiO3 perovskite nanoparticles for advanced optoelectronic applications

Hybrids of polymer-perovskite are attractive materials integrating improved physical and chemical properties with a pliability that presents them as fully suitable for electric devices and optoelectronic applications. In the current work, polymer nanocomposite (PNCs) films based on polymer blend matrix (i.e., polyvinyl alcohol (PVA)/carboxymethyl cellulose (CMC); 70/30 wt% weight ratio) reinforced with the solid-state reaction prepared SrTiO3 nanoparticles (NPs) were prepared using the solution casting technique. The crystallinity degree and chemical composition of the resulting samples were investigated by XRD and FTIR spectroscopy to study the influence of SrTiO3 on the blend structure and complexation with the functional groups of the hybrid PVA/CMC system. The SEM images showed a raise in surface roughness with the NPs content. Optical characteristics of PVA/CMC-SrTiO3 PNCs were examined using UV-Vis. Spectrophotometer. The optical gap (E-g) of the pristine PVA/CMC blend was boosted after loading SrTiO3 NPs. The influence of this perovskite on the ac conductivity, dielectric modulus and relaxation were discussed, where the dielectric constant of PNCs was higher than that of pure PVA/CMC preserving a low dielectric loss. From the experimental results, these PNC samples are promising for optical shielding, photosensors, advanced optoelectronics, photosensors, integral thin film capacitors, and high-density storage devices.