Study of structural, optical, photoluminescence, dielectric, and conductivity properties of PVDF/PVP-SnO2 nanocomposites for optoelectronics and micro-supercapacitors
{"title":"Study of structural, optical, photoluminescence, dielectric, and conductivity properties of PVDF/PVP-SnO2 nanocomposites for optoelectronics and micro-supercapacitors","authors":"","doi":"10.1016/j.est.2024.114034","DOIUrl":null,"url":null,"abstract":"<div><div>The structural, photoluminescence, dielectric, optical, and conductivity characteristics of polymer nanocomposites (PNCs) films made of polyvinylpyrrolidone (PVP) and poly(vinylidene fluoride) doped with tin oxide nanoparticles (SnO<sub>2</sub> NPs) are reported in detail in this research. Using the casting approach, PVDF/PVP films doped with SnO<sub>2</sub> (0.0, 0.5, 2.0, 4.0, and 7.0 wt%) were created. X-ray diffraction (XRD) study was employed to examine the effect of nanoparticles on polymer structure of the films. Using XRD data, the impact of the weight percentage of nanofiller on crystalline size and micro-strain has been investigated. XRD also ascertained the mean particle size of the SnO<sub>2</sub> NPs at 15 nm. The complexation and interactions between the nanofiller and the PVDF/PVP reactive groups were demonstrated by the Fourier transform infrared (FTIR) transmittance spectra. The absorbance spectra from the UV–visible spectrophotometer were used to study optical characteristics. The direct/indirect band gaps for pure blend were decreased from 5.06/4.67 eV to 4.27/3.46 eV for PVDF/PVP-4.0 wt%SnO<sub>2</sub> NPs, while, the values of E<sub>U</sub> of the films increased with the adding of SnO<sub>2</sub> NPs in the polymer matrix. The produced nanocomposite's PL spectra were examined for optical properties, and at 430 nm, a broadened peak of the PVDF/PVP polymer was discovered. When SnO<sub>2</sub> nanofiller were mixed, a shift in wavelength was noticed, albeit the intensity was greatly diminished. Impedance spectroscopy has been used to examine the films' AC electrical conductivity at frequencies between 10<sup>2</sup> and 10<sup>7</sup> Hz. According to Jonscher's rule, the blend's AC electrical conductivity grows as the concentration of SnO<sub>2</sub> NPs does. Furthermore, it has been shown that an increase in nanoparticle concentration raises the dielectric constant and composite dielectric loss. Because the 4 wt% sample has the highest AC conductivity, dielectric constant, and optical characteristics, it can be used to create flexible electrochemical devices and optoelectronic devices with improved charge-storing capacities.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X2403620X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
The structural, photoluminescence, dielectric, optical, and conductivity characteristics of polymer nanocomposites (PNCs) films made of polyvinylpyrrolidone (PVP) and poly(vinylidene fluoride) doped with tin oxide nanoparticles (SnO2 NPs) are reported in detail in this research. Using the casting approach, PVDF/PVP films doped with SnO2 (0.0, 0.5, 2.0, 4.0, and 7.0 wt%) were created. X-ray diffraction (XRD) study was employed to examine the effect of nanoparticles on polymer structure of the films. Using XRD data, the impact of the weight percentage of nanofiller on crystalline size and micro-strain has been investigated. XRD also ascertained the mean particle size of the SnO2 NPs at 15 nm. The complexation and interactions between the nanofiller and the PVDF/PVP reactive groups were demonstrated by the Fourier transform infrared (FTIR) transmittance spectra. The absorbance spectra from the UV–visible spectrophotometer were used to study optical characteristics. The direct/indirect band gaps for pure blend were decreased from 5.06/4.67 eV to 4.27/3.46 eV for PVDF/PVP-4.0 wt%SnO2 NPs, while, the values of EU of the films increased with the adding of SnO2 NPs in the polymer matrix. The produced nanocomposite's PL spectra were examined for optical properties, and at 430 nm, a broadened peak of the PVDF/PVP polymer was discovered. When SnO2 nanofiller were mixed, a shift in wavelength was noticed, albeit the intensity was greatly diminished. Impedance spectroscopy has been used to examine the films' AC electrical conductivity at frequencies between 102 and 107 Hz. According to Jonscher's rule, the blend's AC electrical conductivity grows as the concentration of SnO2 NPs does. Furthermore, it has been shown that an increase in nanoparticle concentration raises the dielectric constant and composite dielectric loss. Because the 4 wt% sample has the highest AC conductivity, dielectric constant, and optical characteristics, it can be used to create flexible electrochemical devices and optoelectronic devices with improved charge-storing capacities.
期刊介绍:
Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.