Identifying the functional properties and characterizations of PVA/PVP polymer blends incorporating CdS/ZnO core–shell (ZCS) fillers for optoelectronic applications

This paper examines composite materials based on polymer blends (PBs) of polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP). Hydrothermal synthesis was used to prepare CdS/ZnO core–shell nanostructures. The casting method was used to synthesize PVA-PVP@CZS PB nanostructures. These materials were characterized using a variety of analytical techniques, as indicated in our statement. XRD characterization revealed that CZS crystallized into hexagonal wurtzite ZnO and cubic CdS. The optical band gap was calculated via UV–Vis–NIR spectra, which decreased as increasing wavelengths. The reported optical band gaps in the present work are truly comparable to other studies of different types of blend polymer films with different fillers and dopants. The frequency-dependent composite films were used to determine the AC conductivity of the produced PB nanostructures. The AC conductivity of the compound follows Jonscher power law, it can provide valuable insights into its electrical transport properties. When increasing the content of ZCS fillers, both (Zʹ) and (Z") changed and decreased with the applied frequency indicating a weakening of the opposition to AC flow within the material or circuit. Equivalent circuits were used to analyze the impedance spectra. The low values of series resistance at high-frequency regions indicate that the films are low-loss materials. The PVA-PVP@ZCS PB nanostructures were also successfully prepared and exhibited improved functional properties, such as enhanced electrical conductivity and optical transparency.