Structural, electrical, and nonlinear optical performance of PVAL embedded with Li⁺‐ions for multifunctional devices

Abstract

In this paper, pure and 0.04%, 0.19%, 0.4%, 1.9%, and 4% LiNO3‐doped PVAL (polyvinyl alcohol) electrolyte were fabricated in the form of solid films by the casting process. The influence of Li+‐ions on PVAL was identified by some characterization tools such as X‐ray diffraction, FT‐IR (Fourier transform infrared), scanning electron microscope (SEM), thermal gravimetric analysis (TGA), UV‐visible‐NIR spectroscopy, dielectric, and conductivity measurements. X‐ray diffraction studies indicate that the semicrystalline of PVAL and the calculated crystallize size from Gaussian fitting were decreased with Li+‐ions concentration. FT‐IR results indicate that there is strong interaction among doping ions and the matrix. The surface morphology of the electrolyte films was studied via SEM. The optical studies demonstrate that the transmittance of films decreased with the rising of Li+‐ions. Urbach's energy and bandgap are also reduced with adding more ions. Different empirical equations were used to study the relation between the energy gap and the refractive index. The index of refraction of the films has average values in 2.024 to 2.078 range. Li+‐ion concentrations critically influenced the factors of nonlinearity. The calculated values of nonlinear optical susceptibility χ(3) and refractive index n2 were increased from 8.6 × 10−13 esu and 1.55 × 10−11 to 20.56 × 10−10 esu and 2.05 × 10−11, respectively. The dielectric constant and loss measurements of the PVAL embedded with 4% of LiNO3 (SPL‐5) were decreased exponentially with increasing the incident frequency. The AC electrical conductivity (σAC) and nonlinear I‐V curves are enhanced by increasing the Li+‐ion contents. The electrical current was increased with small resistivity for SPL‐5 film. The studied films have an inimitable result in various fields, such as nonlinear optical and varistor devices.

Structural, Optical, and Electrical Investigations of Nd2O3-Doped PVA/PVP Polymeric Composites for Electronic and Optoelectronic Applications

“…For example, concerning the direct bandgap, the optical values of ranged from 0.209 esu to 0.220 esu, while varied between 3.30 × 10 −13 esu and 3.984 × 10 −13 esu, and n 2 values ranged from 0.65 × 10 −11 esu to 0.773 × 10 −11 esu. The obtained values of the nonlinear optical parameters for the synthesized Nd +3 -doped PVA/PVP polymeric composites appear to coordinate with the reported data by H. Elhosiny Ali et al [ 74 , 75 ]. The absorption and linear/nonlinear properties of polyvinyl alcohol (PVA) polymeric thin films are optically enhanced through doping with fullerene [ 74 ].…”

“…The absorption and linear/nonlinear properties of polyvinyl alcohol (PVA) polymeric thin films are optically enhanced through doping with fullerene [ 74 ]. Corresponding to the conducting results, significant attention has been paid to the material’s ability to be employed in nonlinear optical devices [ 75 ]. The existence of PB-Nd +3 is set to improve the nonlinear optical parameters when doped on the host PVA/PVP matrix.…”

Use of niobium oxide nanoparticles as nanofillers in PVP/PVA blends to enhance UV–visible absorption, opto‐linear, and nonlinear optical properties

“…This further indicates that as the intensity increases, the nonlinear benefit of the induced polarization increases. [ 54 ] Furthermore, the nonlinear refractive index ( n 2 ) and higher order susceptibilities () of the prepared polymer films were investigated.…”

Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

“…Thermo Nicolet 67,600 spectrometer is used to investigate the molecular structure of PVP/PVA blends. The fabricated samples are miscible through hydrogen bonds formed between the hydroxyl groups in PVA and the carbonyl groups in PVP monomers 5,16,21 . Figure 3 displays the IR‐spectra of pristine PVP/PVA blends, and doped PVP/PVA blends with various PbS NP concentrations.…”