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<p>This study investigates the influence of titanium (IV) isopropoxide (Ti(OiPr)4) fillers on the structural, optical, and dielectric properties of epoxy resin composites, prepared via a simple and direct dispersion method. X-ray Diffraction (XRD) confirmed that filler incorporation maintains the host polymer’s amorphous structure. Crucially, increasing the Ti(OiPr)4 concentration from 0.00&#xa0;wt% to 10.00&#xa0;wt% significantly tuned the material’s optoelectronic response. The indirect optical bandgap (<i>Eg</i>) was notably reduced, decreasing from 3.624&#xa0;eV for the pure resin to a minimum of 2.316&#xa0;eV for the 10.00&#xa0;wt% composite, which enhances UV-blocking capability. Concurrently, both the refractive index (<i>n</i>) and the high-frequency dielectric constant (<i>ε</i><sub><i>∞</i></sub>) increased monotonically with filler content, rising from approximately 1.74–2.42 for <i>ε</i><sub><i>∞</i></sub>. The composite also exhibited enhancements in nonlinear optical performance, showing an increase in both third-order nonlinear optical susceptibility (<i>χ</i><sup><i>(3)</i></sup>) and nonlinear refractive index (n<sub>(2)</sub>). Electrically, the 10.00&#xa0;wt% sample demonstrated the highest AC impedance. These collective, tunable enhancements highlight the composites’ strong potential for integration into advanced optoelectronics, UV-protection coatings, and high-performance electronic devices.</p>

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Effect of titanium (IV) isopropoxide fillers (Ti(OiPr)4) on structural, optical, and dielectric properties of epoxy resin composites for optoelectronic devices

  • 期刊论文

  • 发表日期：

    2025年12月24日

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  • A. Bouzidi,
  • W. Jilani,
  • Ibrahim S. Yahia,
  • M. Al-Dossari

摘要

This study investigates the influence of titanium (IV) isopropoxide (Ti(OiPr)4) fillers on the structural, optical, and dielectric properties of epoxy resin composites, prepared via a simple and direct dispersion method. X-ray Diffraction (XRD) confirmed that filler incorporation maintains the host polymer’s amorphous structure. Crucially, increasing the Ti(OiPr)4 concentration from 0.00 wt% to 10.00 wt% significantly tuned the material’s optoelectronic response. The indirect optical bandgap (Eg) was notably reduced, decreasing from 3.624 eV for the pure resin to a minimum of 2.316 eV for the 10.00 wt% composite, which enhances UV-blocking capability. Concurrently, both the refractive index (n) and the high-frequency dielectric constant (ε∞) increased monotonically with filler content, rising from approximately 1.74–2.42 for ε∞. The composite also exhibited enhancements in nonlinear optical performance, showing an increase in both third-order nonlinear optical susceptibility (χ(3)) and nonlinear refractive index (n(2)). Electrically, the 10.00 wt% sample demonstrated the highest AC impedance. These collective, tunable enhancements highlight the composites’ strong potential for integration into advanced optoelectronics, UV-protection coatings, and high-performance electronic devices.