Solid-state synthesis, structure and spectroscopic analysis of Dy:CaYAl3O7 phosphors
Solid-state synthesis, structure and spectroscopic analysis of Dy:CaYAl3O7 phosphors
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Dy:CaYAl3O7荧光粉的固态合成、结构及光谱分析
DOI：
10.1016/j.jallcom.2018.12.113
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发表时间：
2019-04
期刊：
影响因子：
--
通讯作者：
Chao-yang Tu
中科院分区：
文献类型：
--
作者：
Wei Zhang;Huan Shen;Xiu-li Hu;Yan Wang;Jian-fu Li;Zhao-jie Zhu;Zhen-yu You;Chao-yang Tu
采用高温固相反应法制备了一系列Dy3+激活的CaYAl3O7(Dy：CaYAl3O7)荧光粉。用X射线衍射仪对所制备的荧光粉进行了表征，结果表明，荧光粉的主相为CaYAl3O7。研究了CaYAl3O7的结构，并首次进行了第一性原理计算。通过对其发射光谱和荧光衰减曲线的测量，详细研究了它们的光致发光性质。4F9/2态随Dy3+离子浓度变化的荧光衰减曲线呈现多指数衰减行为，并对其寿命进行了拟合和比较。此外，还研究了Dy：CaYAl3O7荧光粉的能量传递过程。在可见光区观察到一个很强的发射带，峰值位于574 nm，对应于4F9/2→6H13/2跃迁，这表明Dy：CaYAl3O7是一种良好的黄光应用材料。
A series of Dy3+-activated CaYAl3O7(Dy: CaYAl3O7) phosphors were synthesized by the solid-state reaction at high temperature. The prepared phosphors were characterized by X-ray diffraction, and the results showed that the main phase of the phosphor was CaYAl3O7. The structure of CaYAl3O7was investigated and the first-principles calculations were carried out for the first time. The photoluminescence properties of them were investigated in detail through the measurements of their emission spectra and fluorescence decay curves. The fluorescence decay curves of the4F9/2state with different Dy3+ions concentrations exhibited multi-exponential decaying behavior, then the lifetimes were fitted and compared. Furthermore, the energy transfer processes within Dy: CaYAl3O7phosphors were investigated. In the visible region, a strong emission band was observed with peak at 574 nm, corresponding to4F9/2→6H13/2transition, which indicates that Dy: CaYAl3O7is good material for yellow light applications.
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