Scholarlink

<p>This research investigates the creation of aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) nanoparticles using pulsed laser ablation in liquid (PLAL) and their utilization in photodetector devices constructed on porous silicon (PS) substrates. Different laser energy levels (400, 600, 800, and 1000&#xa0;mJ) were utilized to produce Al<sub>2</sub>O<sub>3</sub> nanoparticles, and their structural, optical, and electrical properties were methodically examined. Scanning electron microscopy (SEM) demonstrated the spherical morphology of Al<sub>2</sub>O<sub>3</sub> nanoparticles, whilst X-ray diffraction (XRD) investigation validated their cubic phase structure. The optical absorption spectra revealed distinct surface plasmon resonance peaks at around 228&#xa0;nm, enhancing absorption as laser energy rose. The band gaps of Al<sub>2</sub>O<sub>3</sub> nanoparticles diminished from 4.83&#xa0;eV to 4.19&#xa0;eV with increasing laser energy, signifying an enlargement in nanoparticle size and a decrease in quantum confinement effects. The Al<sub>2</sub>O<sub>3</sub> NPs/PS photodetector, employing 1000&#xa0;mJ laser energy, demonstrated a peak responsivity of 0.145 A/W at 600&#xa0;nm, signifying substantial enhancements in performance for visible and near-infrared light detection. The external quantum efficiency of the photodetector rose with increased laser intensity, attaining 15.6% at 400&#xa0;nm. These findings highlight the capability of laser-synthesized Al<sub>2</sub>O<sub>3</sub> nanoparticles to improve photodetectors’ sensitivity and efficiency, especially in the visible and ultraviolet spectra.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis of Al2O3 Nanoparticles via Laser Ablation for Photodetectors Application

  • 期刊论文

  • 发表日期：

    2025年4月21日

查看全文
  • Shireen A. Rasheed,
  • Uday M. Nayef,
  • Mohammed W. Muayad

摘要

This research investigates the creation of aluminum oxide (Al2O3) nanoparticles using pulsed laser ablation in liquid (PLAL) and their utilization in photodetector devices constructed on porous silicon (PS) substrates. Different laser energy levels (400, 600, 800, and 1000 mJ) were utilized to produce Al2O3 nanoparticles, and their structural, optical, and electrical properties were methodically examined. Scanning electron microscopy (SEM) demonstrated the spherical morphology of Al2O3 nanoparticles, whilst X-ray diffraction (XRD) investigation validated their cubic phase structure. The optical absorption spectra revealed distinct surface plasmon resonance peaks at around 228 nm, enhancing absorption as laser energy rose. The band gaps of Al2O3 nanoparticles diminished from 4.83 eV to 4.19 eV with increasing laser energy, signifying an enlargement in nanoparticle size and a decrease in quantum confinement effects. The Al2O3 NPs/PS photodetector, employing 1000 mJ laser energy, demonstrated a peak responsivity of 0.145 A/W at 600 nm, signifying substantial enhancements in performance for visible and near-infrared light detection. The external quantum efficiency of the photodetector rose with increased laser intensity, attaining 15.6% at 400 nm. These findings highlight the capability of laser-synthesized Al2O3 nanoparticles to improve photodetectors’ sensitivity and efficiency, especially in the visible and ultraviolet spectra.