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<p>This study presents a novel and cost-effective strategy for the fabrication of cadmium oxide (CdO) photodetectors via pulsed laser ablation in liquid (PLAL), employing propanol as the ablation medium. To the best of our knowledge, this is the first investigation into the synthesis and optoelectronic characterization of CdO-based photodetectors produced in a propanol environment. X-ray diffraction (XRD) analysis confirmed the formation of a nanocrystalline cubic phase, while scanning electron microscopy (SEM) revealed a uniform distribution of nanoparticles. Atomic force microscopy (AFM) demonstrated a smooth and homogeneous surface morphology with low roughness, favoring efficient charge transport and optical stability. UV–Vis spectroscopy indicated a direct bandgap suitable for photodetection, with strong absorption in the visible and near-infrared regions. Fourier-transform infrared spectroscopy (FTIR) confirmed the presence of functional groups and Cd–O bonding, reflecting high structural and chemical integrity. Electrical measurements revealed ohmic behavior and enhanced conductivity, while capacitance–voltage (C–V) analysis exhibited diode-like characteristics and a high dielectric constant, suggesting efficient carrier separation with minimal leakage. The synthesized CdO films displayed remarkable light sensitivity, high spectral responsivity, and notable quantum efficiency. These findings underscore the potential of PLAL in propanol as a promising technique for developing high-performance nanostructured CdO photodetectors.</p>

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Efficient CdO photodetector prepared via laser ablation in propanol medium

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Hawraa H. Abbas,
  • Nwar A. Yousif,
  • Thamir Hassen Ali,
  • Selma M. H. AL-Jawad

摘要

This study presents a novel and cost-effective strategy for the fabrication of cadmium oxide (CdO) photodetectors via pulsed laser ablation in liquid (PLAL), employing propanol as the ablation medium. To the best of our knowledge, this is the first investigation into the synthesis and optoelectronic characterization of CdO-based photodetectors produced in a propanol environment. X-ray diffraction (XRD) analysis confirmed the formation of a nanocrystalline cubic phase, while scanning electron microscopy (SEM) revealed a uniform distribution of nanoparticles. Atomic force microscopy (AFM) demonstrated a smooth and homogeneous surface morphology with low roughness, favoring efficient charge transport and optical stability. UV–Vis spectroscopy indicated a direct bandgap suitable for photodetection, with strong absorption in the visible and near-infrared regions. Fourier-transform infrared spectroscopy (FTIR) confirmed the presence of functional groups and Cd–O bonding, reflecting high structural and chemical integrity. Electrical measurements revealed ohmic behavior and enhanced conductivity, while capacitance–voltage (C–V) analysis exhibited diode-like characteristics and a high dielectric constant, suggesting efficient carrier separation with minimal leakage. The synthesized CdO films displayed remarkable light sensitivity, high spectral responsivity, and notable quantum efficiency. These findings underscore the potential of PLAL in propanol as a promising technique for developing high-performance nanostructured CdO photodetectors.