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<p>In-MgO nanostructure were fabricated by laser ablation in two steps; the first involved preparing magnesium oxide nanoparticles through laser ablation of a magnesium target placed at the bottom of a quartz vessel filled with 3&#xa0;ml of deionized water. This process used a Q-switched Nd: YAG laser with energy of 80&#xa0;mJ at ablation time of 10&#xa0;min. The second step of the doping process involved replacing the magnesium target with an indium plate put in as-prepared MgO suspension and applying the laser at the same energy while varying ablation times from 2 to 5&#xa0;min. X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), UV–visible, photoluminescence spectroscopy (PL) was carried out to analyse the structure, morphology and optical properties of the synthesised samples. The XRD results show that the MgO with indium maintained a polycrystalline cubic structure and exhibited a (113) preferred orientation at a diffraction angle of 32.56°. The TEM images revealed that the MgO particles exhibited a spherical morphology, measuring approximately 5.5&#xa0;mm in size. When indium was added, the particles changed to a flower-like structure with an average size of 7&#xa0;mm. The optical absorption spectra increased as the indium concentration rose, but the band gap dropped from 5.5&#xa0;eV to 4.6&#xa0;eV. A broad blue emission was observed when indium was added to MgO NPs. The emission peak intensity decreased with longer laser irradiation times, with the sample at 5&#xa0;min exhibiting the lowest peak intensity. Furthermore, the current-voltage characteristics of the MgO/Si devices showed an improvement in photocurrent with the addition of indium doping. These trends are expected and will lead to new and exciting optoelectronic applications.</p>

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A rapid Synthesis Method for Indium-doped Magnesium Oxide (MgO) Nanoparticles by Laser Ablation in Liquid Media for Optoelectronic Applications

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Khawla S. Khashan,
  • Aseel A. Hadi,
  • Maryam Mahdi

摘要

In-MgO nanostructure were fabricated by laser ablation in two steps; the first involved preparing magnesium oxide nanoparticles through laser ablation of a magnesium target placed at the bottom of a quartz vessel filled with 3 ml of deionized water. This process used a Q-switched Nd: YAG laser with energy of 80 mJ at ablation time of 10 min. The second step of the doping process involved replacing the magnesium target with an indium plate put in as-prepared MgO suspension and applying the laser at the same energy while varying ablation times from 2 to 5 min. X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), UV–visible, photoluminescence spectroscopy (PL) was carried out to analyse the structure, morphology and optical properties of the synthesised samples. The XRD results show that the MgO with indium maintained a polycrystalline cubic structure and exhibited a (113) preferred orientation at a diffraction angle of 32.56°. The TEM images revealed that the MgO particles exhibited a spherical morphology, measuring approximately 5.5 mm in size. When indium was added, the particles changed to a flower-like structure with an average size of 7 mm. The optical absorption spectra increased as the indium concentration rose, but the band gap dropped from 5.5 eV to 4.6 eV. A broad blue emission was observed when indium was added to MgO NPs. The emission peak intensity decreased with longer laser irradiation times, with the sample at 5 min exhibiting the lowest peak intensity. Furthermore, the current-voltage characteristics of the MgO/Si devices showed an improvement in photocurrent with the addition of indium doping. These trends are expected and will lead to new and exciting optoelectronic applications.