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<p>Mn<sup>4+</sup> is a typical transition metal activator, but the poor stability of Mn<sup>4+</sup>-doped fluoride phosphors has greatly restricted their application scenarios. Therefore, it is crucial to explore fluoride host materials with excellent comprehensive performance. In this paper, a red-emitting BaTaF<sub>7</sub>:Mn<sup>4+</sup> phosphor with favorable stability was synthesized via the hydrothermal method, and the correlation between its crystal structure and luminescent properties was investigated and discussed. After immersion for 300&#xa0;min, the luminescence intensity of the material decreased to 59.01% of the initial value, indicating its good water stability. When the as-prepared phosphor was encapsulated into LED devices, the devices exhibited a high color rendering index (CRI) and a low correlated color temperature (CCT) under a driving current of 30&#xa0;mA. Consequently, BaTaF<sub>7</sub>:Mn<sup>4+</sup> has great application potential as a red phosphor for warm white light-emitting diodes (LEDs).</p>

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Preparation and luminescence properties of a highly efficient narrowband red-emitting BaTaF7:Mn4+ phosphor

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Weilong Wang,
  • Jipeng Rao,
  • Wenxi Zhu,
  • Xiaoyun Mi,
  • Zhengce An,
  • Quansheng Liu,
  • Xiuling Liu

摘要

Mn4+ is a typical transition metal activator, but the poor stability of Mn4+-doped fluoride phosphors has greatly restricted their application scenarios. Therefore, it is crucial to explore fluoride host materials with excellent comprehensive performance. In this paper, a red-emitting BaTaF7:Mn4+ phosphor with favorable stability was synthesized via the hydrothermal method, and the correlation between its crystal structure and luminescent properties was investigated and discussed. After immersion for 300 min, the luminescence intensity of the material decreased to 59.01% of the initial value, indicating its good water stability. When the as-prepared phosphor was encapsulated into LED devices, the devices exhibited a high color rendering index (CRI) and a low correlated color temperature (CCT) under a driving current of 30 mA. Consequently, BaTaF7:Mn4+ has great application potential as a red phosphor for warm white light-emitting diodes (LEDs).