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<p>This work presents PMMA/PANI–WO₃ nanocomposites with tunable optical and electrical properties, designed for optoelectronic and energy storage applications. The novelty of this study lies in the incorporation of WO₃ nanoparticles into a PMMA/PANI blend, enabling a simultaneous enhancement of dielectric behavior, ionic conductivity, and optical response. XRD and FTIR analyses confirmed reduced crystallinity and strong polymer–filler interactions. Optical studies revealed a notable decrease in the band gap from 3.80&#xa0;eV for pure PMMA/PANI to 3.18&#xa0;eV at the highest WO₃ loading, accompanied by improved refractive index. Thermal analysis demonstrated enhanced stability, while impedance spectroscopy showed an increase in ionic conductivity by nearly three orders of magnitude (10⁻⁸ → 10<sup>−5</sup>&#xa0;S cm⁻<sup>1</sup>), along with a higher dielectric constant, attributed to interfacial polarization and improved charge mobility. These results establish WO₃ as an effective nanofiller for tailoring multifunctional properties in polymer composites, making the developed materials promising candidates for flexible optoelectronic devices, supercapacitors, and advanced energy storage systems.</p>

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Tunable band gap and ionic conductivity in PMMA and PANI blend with WO₃ nanocomposites for optoelectronics and energy storage devices

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月3日

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  • Ahlam I. Al-Sulami,
  • Nuha Y. Elamin,
  • Eman Aldosari,
  • M. O. Farea,
  • Soad S. Alzahrani,
  • Amani M. Al-Harthi,
  • Ebtesam M. Alharbi,
  • A. Rajeh

摘要

This work presents PMMA/PANI–WO₃ nanocomposites with tunable optical and electrical properties, designed for optoelectronic and energy storage applications. The novelty of this study lies in the incorporation of WO₃ nanoparticles into a PMMA/PANI blend, enabling a simultaneous enhancement of dielectric behavior, ionic conductivity, and optical response. XRD and FTIR analyses confirmed reduced crystallinity and strong polymer–filler interactions. Optical studies revealed a notable decrease in the band gap from 3.80 eV for pure PMMA/PANI to 3.18 eV at the highest WO₃ loading, accompanied by improved refractive index. Thermal analysis demonstrated enhanced stability, while impedance spectroscopy showed an increase in ionic conductivity by nearly three orders of magnitude (10⁻⁸ → 10−5 S cm⁻1), along with a higher dielectric constant, attributed to interfacial polarization and improved charge mobility. These results establish WO₃ as an effective nanofiller for tailoring multifunctional properties in polymer composites, making the developed materials promising candidates for flexible optoelectronic devices, supercapacitors, and advanced energy storage systems.