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Using the solution casting method, we have successfully synthesized the Polyvinyl alcohol (PVA) nanocomposites films incorporated with silicon carbide (SiC) nanoparticles. X-ray diffraction (XRD) verified the microstructural duality of PVA, characterized by its co-existing crystalline and amorphous domains and the successful inclusion of SiC. Fourier-transform infrared (FTIR) spectroscopy revealed interactions between the SiC nanoparticles and the PVA matrix, indicating hydrogen bonding. The primary novelty of this research was the observed significant tuning of optical properties, the optical band gap was decreased from 5.25 eV in pure PVA to 4.74 eV with a 3 wt% SiC doping, while the refractive index surged substantially from 1.9 to 2.77 at the same concentration. This effect was more pronounced than those typically achieved with other nanofillers. The reduction in band gap was correlated with enhanced charge transfer, and a rise in optical conductivity with higher SiC content indicated stronger light-matter interaction. These results underscore the superior potential of SiC-doped PVA nanocomposites for advanced photonic and optoelectronic technologies.

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Tailoring Optical Properties of PVA-SiC Nanocomposite Films for Optoelectronic Applications

  • 会议论文

  • 发表日期：

    2026年

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  • Kiran Thakur,
  • Jitendra Prakash Chandra,
  • Suleman Kujur,
  • Vikas Gulhare,
  • Dinesh Uthra,
  • Ahmed Hashim

摘要

Using the solution casting method, we have successfully synthesized the Polyvinyl alcohol (PVA) nanocomposites films incorporated with silicon carbide (SiC) nanoparticles. X-ray diffraction (XRD) verified the microstructural duality of PVA, characterized by its co-existing crystalline and amorphous domains and the successful inclusion of SiC. Fourier-transform infrared (FTIR) spectroscopy revealed interactions between the SiC nanoparticles and the PVA matrix, indicating hydrogen bonding. The primary novelty of this research was the observed significant tuning of optical properties, the optical band gap was decreased from 5.25 eV in pure PVA to 4.74 eV with a 3 wt% SiC doping, while the refractive index surged substantially from 1.9 to 2.77 at the same concentration. This effect was more pronounced than those typically achieved with other nanofillers. The reduction in band gap was correlated with enhanced charge transfer, and a rise in optical conductivity with higher SiC content indicated stronger light-matter interaction. These results underscore the superior potential of SiC-doped PVA nanocomposites for advanced photonic and optoelectronic technologies.