Extraction and studies of optoelectrical parameters of PVC/Zn0.9M0.1S (M: Co, Fe, Mn, V) films

Abstract

To be used in optoelectronic applications, the nanocomposites films (doped PVC with Zn0.9M0.1S samples: M = Co, Fe, Mn, V) were prepared in this study. Casting and solid-state reaction procedures were employed to prepare PVC/CMC/Zn0.9M0.1S films. Rietveld refinement method and transmission electron microscope technique were used to investigate the structure and microstructure parameters of Zn0.9M0.1S (M: Co, Fe, Mn, V). X-ray diffraction, Fourier transform infrared and scanning electron microscope techniques were used to study the change in the structure, surface morphology and vibrational bands of PVC polymer upon doping with Zn0.9M0.1S. According to the findings, changing the type of the transition metals in Zn0.9M0.1S caused a change in the host polymer's optical characteristics. Depending on the kind of transition metals in Zn0.9M0.1S, the direct and indirect optical energy gaps of PVC/CMC/Zn0.9M0.1S are irregularly reduced. The direct/indirect optical band gaps of PVC dropped from (5.59, 5.22) eV to minimum values of (5.3, 4.27) eV as it was doped with ZnS. As Zn0.9M0.1S was incorporated into the PVC matrix, the linear and nonlinear optical parameters increased. The fluorescence intensity of pristine PVC is very weak, and it enhanced greatly as it doped with Zn0.9M0.1S. The dielectric constant (ε′), dielectric loss factor (ε″), ac conductivity (σac), the real (M′) and imaginary (M″) parts of the electric modulus changed nonmonotonically with the type of metal in Zn0.9M0.1S. Among all polymers, ′, ″ and σac revealed highest values for the PVC/Zn0.9Co0.1S and the lowest ones for PVC/Zn0.9V0.1S.