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<p>In the present study, zinc oxide–polyaniline (ZnO:PANI) hybrid nanocomposites with controlled mass ratios were prepared and systematically investigated as candidate materials for ultraviolet (UV) photodetector applications. ZnO:PANI nanocomposites with mass ratios of 1:20, 1:1, and 20:1 were synthesized via a simple physical mixing method followed by thermal annealing on glass substrates. The structural, optical, and electrical properties were examined to understand the influence of composition on optoelectronic behavior. Optical analysis revealed that ZnO incorporation modifies the optical properties of the polymer matrix, resulting in tunable bandgap values depending on the composite ratio. Furthermore, the highest current was observed in ZnO-rich composites (20:1), which is attributed to enhanced conduction transport arising from the formation of continuous ZnO percolation pathways that facilitate efficient electron mobility across the nanocomposite. Morphological and structural analyses confirmed uniform film formation, effective dispersion of ZnO nanoparticles, and preservation of crystallinity. Although direct photodetector measurements were not performed, the observed tunable optical absorption and improved electrical conductivity suggest that these hybrid nanocomposites are promising material platforms for future UV photodetector device integration. These findings provide valuable insights into composition-dependent optoelectronic tuning in ZnO-PANI systems.</p>

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ZnO–PANI hybrid nanocomposites with tunable optoelectronic properties as promising materials for UV photodetector applications

  • 期刊论文

  • 发表日期：

    2026年5月21日

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  • Suvindraj Rajamanickam,
  • Shawbo Abdulsamad Abubaker

摘要

In the present study, zinc oxide–polyaniline (ZnO:PANI) hybrid nanocomposites with controlled mass ratios were prepared and systematically investigated as candidate materials for ultraviolet (UV) photodetector applications. ZnO:PANI nanocomposites with mass ratios of 1:20, 1:1, and 20:1 were synthesized via a simple physical mixing method followed by thermal annealing on glass substrates. The structural, optical, and electrical properties were examined to understand the influence of composition on optoelectronic behavior. Optical analysis revealed that ZnO incorporation modifies the optical properties of the polymer matrix, resulting in tunable bandgap values depending on the composite ratio. Furthermore, the highest current was observed in ZnO-rich composites (20:1), which is attributed to enhanced conduction transport arising from the formation of continuous ZnO percolation pathways that facilitate efficient electron mobility across the nanocomposite. Morphological and structural analyses confirmed uniform film formation, effective dispersion of ZnO nanoparticles, and preservation of crystallinity. Although direct photodetector measurements were not performed, the observed tunable optical absorption and improved electrical conductivity suggest that these hybrid nanocomposites are promising material platforms for future UV photodetector device integration. These findings provide valuable insights into composition-dependent optoelectronic tuning in ZnO-PANI systems.