Potential of 5CBLC-doped PVA-PVP films in optoelectronic devices: particularly regarding their enhanced insulation properties

Abstract

We aim to analyze the influence of 5CBLC content on the structural, optical, and dielectric properties of the PVA-PVP blend polymer. The absence of additional peaks in the XRD patterns after doping strengthens the argument for complete dissociation and homogeneous complexation of 5CBLC molecules within the blend polymer matrix. The dopant atoms are no longer arranged in a separate crystalline structure but are uniformly distributed throughout the polymer, leading to no distinct peaks in the XRD pattern. Changes in the wavelengths of maximum absorption indicate changes in the energy required to excite electrons. If the peaks shift towards longer wavelengths (red shift), it suggests a decrease in the energy gap between orbitals, potentially due to increased conjugation caused by 5CBLC. The 0.05 ml of doped PVA-PVP@5CBLC PBFs readily absorbs light at wavelengths below 824 nm. A 5CBLC molecule's energy level may allow it to absorb photons with energies below 824 nm. As 5CBLC scatter and absorb light, there is a decrease in normalizing power with 5CBLC amounts. As the amount of 5CBLC increases, it removes some light from the incident beam through both scattering and absorption. This reduces the amount of light available for further scattering by the particles of interest in the experiment. As both the imaginary and real parts of the impedance decrease, the 5CBLC amounts facilitated a more resistive and less reactive matrix for the PVA-PVP blend. The ESC and EPC significantly decrease with increasing frequency for both the pure PVA-PVP PBF and the PVA-PVP@5CBLC PBFs in various 5CBLC amounts. Results suggest that combining 5CBLC with PVA-PVP creates a material with properties that make it well-suited for applications in optoelectronics.