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<p>Gallium oxide (Ga₂O₃), a wide band gap material, serves as an effective host for phosphors, with emission colour tunable through doping with suitable rare- earth elements. The present study investigates the influence of dysprosium doping on Ga₂O₃’s luminescence characteristics. Samples were synthesized via a hydrothermal method and subjected to calcination at various temperatures 600&#xa0;°C, 750&#xa0;°C, 900&#xa0;°C, 1050&#xa0;°C. These samples were characterized using X-ray diffraction, UV–visible spectroscopy, Raman spectroscopy, and photoluminescence spectroscopy. The photoluminescence spectra of the samples were analysed to identify the defect states. The CIE (Commission Internationale de l’Eclairage) coordinates were calculated and chromaticity diagram was plotted to determine the overall luminescence colour emission. To assess potential phosphorescence properties, decay plot was analysed and average lifetime was calculated.</p>

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Synthesis of white emitting Dy-doped Ga₂O₃ phosphors via hydrothermal method

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Rakhy Raphael,
  • P. N. Arya,
  • Sadasivan Shaji,
  • E. I. Anila

摘要

Gallium oxide (Ga₂O₃), a wide band gap material, serves as an effective host for phosphors, with emission colour tunable through doping with suitable rare- earth elements. The present study investigates the influence of dysprosium doping on Ga₂O₃’s luminescence characteristics. Samples were synthesized via a hydrothermal method and subjected to calcination at various temperatures 600 °C, 750 °C, 900 °C, 1050 °C. These samples were characterized using X-ray diffraction, UV–visible spectroscopy, Raman spectroscopy, and photoluminescence spectroscopy. The photoluminescence spectra of the samples were analysed to identify the defect states. The CIE (Commission Internationale de l’Eclairage) coordinates were calculated and chromaticity diagram was plotted to determine the overall luminescence colour emission. To assess potential phosphorescence properties, decay plot was analysed and average lifetime was calculated.