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<p>BiVO<sub>4</sub> phosphors doped with different concentrations of Sm<sup>3+</sup> ions (1, 3, 5, and 7&#xa0;mol%) were prepared by the hydrothermal synthesis method and heat-treated at 160&#xa0;°C for 12&#xa0;h. X-ray diffraction results show that when Sm<sup>3+</sup> ions replace Bi<sup>3+</sup> ions at lattice sites, no second phase is formed in BiVO<sub>4</sub> as the Sm<sup>3+</sup> doping concentration increases, and the monoclinic crystal structure is maintained. With increasing Sm<sup>3+</sup> doping concentration, the phosphor powders exhibit irregular particle morphology, and the particle sizes are non-uniform. Regarding the photoluminescence properties, the emission spectra are mainly composed of the characteristic emission peaks of Sm<sup>3+</sup> ions, corresponding to the electronic transitions at 566&#xa0;nm (<sup>4</sup>G<sub>5/2</sub> → <sup>6</sup>H<sub>5/2</sub>), 605&#xa0;nm (<sup>4</sup>G<sub>5/2</sub> → <sup>6</sup>H<sub>7/2</sub>), and 648&#xa0;nm (<sup>4</sup>F<sub>9/2</sub> → <sup>6</sup>H<sub>9/2</sub>). As the Sm<sup>3+</sup> concentration increases, the emission intensity of the 604&#xa0;nm peak (<sup>4</sup>G<sub>5/2</sub> → <sup>6</sup>H<sub>7/2</sub>) first increases and then decreases. When the Sm<sup>3+</sup> doping concentration is 3&#xa0;mol%, the phosphor exhibits the optimal emission intensity with CIE chromaticity coordinates are (x = 0.301, y = 0.374), which are located in the near-white light region.</p>

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Investigation of the luminescent properties of Sm3+ ion-doped BiVO4 synthesized via the hydrothermal method

  • 期刊论文

  • 发表日期：

    2026年7月16日

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  • Kuo-Da Chou,
  • Lay-Gaik Teoh,
  • Jian-Syun Chen,
  • Yee-Shin Chang

摘要

BiVO4 phosphors doped with different concentrations of Sm3+ ions (1, 3, 5, and 7 mol%) were prepared by the hydrothermal synthesis method and heat-treated at 160 °C for 12 h. X-ray diffraction results show that when Sm3+ ions replace Bi3+ ions at lattice sites, no second phase is formed in BiVO4 as the Sm3+ doping concentration increases, and the monoclinic crystal structure is maintained. With increasing Sm3+ doping concentration, the phosphor powders exhibit irregular particle morphology, and the particle sizes are non-uniform. Regarding the photoluminescence properties, the emission spectra are mainly composed of the characteristic emission peaks of Sm3+ ions, corresponding to the electronic transitions at 566 nm (4G5/2 → 6H5/2), 605 nm (4G5/2 → 6H7/2), and 648 nm (4F9/2 → 6H9/2). As the Sm3+ concentration increases, the emission intensity of the 604 nm peak (4G5/2 → 6H7/2) first increases and then decreases. When the Sm3+ doping concentration is 3 mol%, the phosphor exhibits the optimal emission intensity with CIE chromaticity coordinates are (x = 0.301, y = 0.374), which are located in the near-white light region.