Scholarlink

<p>This study successfully synthesized Dy<sup>3+</sup>-doped <i>β</i>-Ga<sub>2</sub>O<sub>3</sub> phosphors via the sol–gel method. After calcination at 1000°C for 30&#xa0;min, a monoclinic crystalline structure was obtained. With increasing Dy<sup>3+</sup> doping concentration, secondary phases were observed in the x-ray diffraction analysis owing to the significant difference in ionic radii between Ga<sup>3+</sup> and Dy<sup>3+</sup> ions; meanwhile, the rod-like morphology of the phosphor particles exhibited a tendency to grow larger. Under excitation with a 260&#xa0;nm ultraviolet light source, two main emission bands were observed in the visible region: a blue emission band at 470–500&#xa0;nm corresponding to the <sup>4</sup>F<sub>9/2</sub> → <sup>6</sup>H<sub>15/2</sub> transition, and a yellow emission band at 560–600&#xa0;nm corresponding to the <sup>4</sup>F<sub>9/2</sub> → <sup>6</sup>H<sub>13/2</sub> transition. With increasing Dy<sup>3+</sup> doping concentration, the emission intensity also increased and reached an optimum at 3&#xa0;mol.%, at which the corresponding CIE chromaticity coordinates were (<i>x</i> = 0.33, <i>y</i> = 0.36) and the decay lifetime was 14.09&#xa0;ms. As the Dy<sup>3+</sup> concentration increased, the CIE chromaticity coordinates of the <i>β</i>-Ga<sub>2</sub>O<sub>3</sub>:Dy<sup>3+</sup> phosphors gradually shifted from the blue region toward the near-white region, and the correlated color temperature (CCT) values were located between the natural white and cool white light regions.</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

Structural and Optical Properties of β-Ga2O3:Dy3+ Phosphors Prepared via the Sol–Gel Method

  • 期刊论文

  • 发表日期：

    2026年4月15日

查看全文
  • Sean Wu,
  • Lay-Gaik Teoh,
  • Guo-Ju Chen,
  • Yee-Shin Chang

摘要

This study successfully synthesized Dy3+-doped β-Ga2O3 phosphors via the sol–gel method. After calcination at 1000°C for 30 min, a monoclinic crystalline structure was obtained. With increasing Dy3+ doping concentration, secondary phases were observed in the x-ray diffraction analysis owing to the significant difference in ionic radii between Ga3+ and Dy3+ ions; meanwhile, the rod-like morphology of the phosphor particles exhibited a tendency to grow larger. Under excitation with a 260 nm ultraviolet light source, two main emission bands were observed in the visible region: a blue emission band at 470–500 nm corresponding to the 4F9/2 → 6H15/2 transition, and a yellow emission band at 560–600 nm corresponding to the 4F9/2 → 6H13/2 transition. With increasing Dy3+ doping concentration, the emission intensity also increased and reached an optimum at 3 mol.%, at which the corresponding CIE chromaticity coordinates were (x = 0.33, y = 0.36) and the decay lifetime was 14.09 ms. As the Dy3+ concentration increased, the CIE chromaticity coordinates of the β-Ga2O3:Dy3+ phosphors gradually shifted from the blue region toward the near-white region, and the correlated color temperature (CCT) values were located between the natural white and cool white light regions.