Novel single-phase full-color emitting Ba9Lu2Si6O24:Ce3+/Mn2+/Tb3+ phosphors for white LED applications
Novel single-phase full-color emitting Ba9Lu2Si6O24:Ce3+/Mn2+/Tb3+ phosphors for white LED applications
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用于白光 LED 应用的新型单相全色发光 Ba9Lu2Si6O24: Ce3 /Mn2 /Tb3 荧光粉
DOI：
10.1007/s10853-017-1162-y
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Simeon Agathopoulos
中科院分区：
文献类型：
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作者：
Sayed Ali Khan;Zhong Hao;Hu Wei-Wei;Lu-Yuan Hao;Xin Xu;Noor Zamin Khan;Simeon Agathopoulos
采用高温固相反应法成功合成了Ba 9 Lu 2Si 6 O24：Ce 3 +/Mn 2 +/Tb 3+单组分全色发光材料。所产生的磷光体的X-射线衍射图的分析表明，所有的发光掺杂阳离子优选地占据主体晶格中的Ba 2+位点。根据Ce 3+和Tb 3+的浓度使用Li+作为电荷补偿试剂。在紫外光激发下，Ce 3+掺杂的荧光粉在424 nm处有一个强的蓝色发射带。在共掺杂的荧光粉中，实验结果表明，从Ce 3+到Tb 3+和Mn 2+的有效能量转移机制导致在Tb 3+掺杂的荧光粉中产生绿色发射，而在Mn 2+掺杂的荧光粉中产生红色发射。含有特定浓度的Ce 3+、Mn 2+和Tb 3+离子的三重掺杂磷光体产生具有良好显色指数值的可调谐（在宽范围内）白色光。研究了该荧光粉的热行为，显示出较好的特性。这一结果使所制备的粉末有资格作为潜在的单相三色白色发光磷光体。
Novel single-phase full-color-emitting Ba9Lu2Si6O24:Ce3+/Mn2+/Tb3+phosphors were successfully synthesized by a high-temperature solid-state reaction method. Analysis of the X-ray diffractograms of the produced phosphors suggests that all the luminescence doping cations preferably occupy the Ba2+sites in the host lattice. Li+were used according to Ce3+and Tb3+concentration as a charge compensation regent. Under UV excitation, the single Ce3+-doped phosphor exhibits an intense blue emission band that peaks at 424 nm. In the co-doped phosphors, the experimental results suggest that an efficient energy transfer mechanism from Ce3+to Tb3+and Mn2+results in the generation of a green emission in the Tb3+-doped phosphors and a red emission in the Mn2+-doped ones. The triple-doped phosphors, which contained specific concentrations of Ce3+, Mn2+, and Tb3+ions, generated a tunable (in a wide range) white light which had good color rendering index values. Thermal behavior of the present phosphors was investigated which shows better characteristics. This result qualifies the produced powders as potential single-phase trichromatic white light-emitting phosphors.