Novel emission-tunable oxyapatites-type phosphors: Synthesis, luminescent properties and the applications in white light emitting diodes with higher color rendering
Novel emission-tunable oxyapatites-type phosphors: Synthesis, luminescent properties and the applications in white light emitting diodes with higher color rendering
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DOI：
10.1016/j.dyepig.2016.12.042
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发表时间：
2017-04-01
影响因子：
4.5
通讯作者：
Mei, Lefu
中科院分区：
文献类型：
--
作者：
Guo, Qingfeng;Zhao, Chenglong;Mei, Lefu
通过引入共掺杂的激活剂和敏化剂，利用能量转移过程来开发颜色可调的磷光体一直是一个最先进的课题。本文采用高温固相反应法制备了新型的Ba-10（PO 4）（6）O：Eu 2+，Tb 3 +/Li+发光材料，并将其应用于具有较高显色指数的白色发光二极管（w-LED）。Ba-10（PO 4）（6）O：Eu 2+，Tb 3 +/Li+通过改变Eu 2+与Tb 3+的相对比例，可实现从蓝色到绿色的可调谐颜色，在230400 nm范围内表现出良好的吸收。结合Inokuti-Hirayama（I-H）模型和Reisfeld近似，证明了Eu ~（2+）与Tb ~（3+）之间的能量传递机制为四极-四极相互作用。重要的是，通过混合Ba-9.83（PO 4）（6）O：0.03 Eu（2+），0.07 Tb（3+），0.07（Li+）和商业红色荧光体CaAlSiN 3：Eu 2+来封装原型白色灯，并且该灯表现出更高的显色指数（Ra = 92和R9 = 56）和4361 K的暖相关色温，用于实际应用。与商业Y（3）A（15）O（12）：Ce 3+基w-LED相比，具有更好的发光性能，表明Ba-10（PO 4）（6）O：Eu 2+，Tb 3 +/Li+磷光体正在成为潜在的磷光体转换w-LED。(C)2016爱思唯尔有限公司版权所有
Developing color-tunable phosphors via the introduction of co-doping activators and sensitizers to the host with energy transfer processes has been a state-of-the-art topic for a long time. In this work, novel emission-tunable oxyapatites-type Ba-10(PO4)(6)O:Eu2+,Tb3+/Li+ phosphors were prepared via a high temperature solid state reaction for the applications in white light emitting diodes (w-LEDs) with higher color rendering index. Tunable colors from blue to green can be realized in the Ba-10(PO4)(6)O:Eu2+,Tb3+/Li+ by varying the relative ratios of Eu2+ to Tb3+, showing good absorption in the range of 230400 nm. The energy transfer mechanism from Eu2+ to Tb3+ ions was demonstrated to be a quadrupole-quadrupole interaction by combining the Inokuti-Hirayama (I-H) model and Reisfeld's approximation. Importantly, a prototype white lamp was packaged by mixing Ba-9.83(PO4)(6)O: 0.03Eu(2+,) 0.07Tb(3+), 0.07(Li+) and commercial red phosphor CaAlSiN3: Eu2+, and the lamp exhibits a higher color rendering index (Ra = 92 and R9 = 56) and warm correlated color temperature of 4361 K for the actual application. Better luminescent properties compared to commercial Y(3)A(15)O(12):Ce3+-based w-LEDs, indicating that Ba-10(PO4)(6)O: Eu2+, Tb3+/Li+ phosphors are emerging as potential phosphor-converted w-LEDs. (C) 2016 Elsevier Ltd. All rights reserved.