Energy transfer and tunable luminescence properties in Y3Al2Ga3O12: Tb3+, Eu3+ phosphors
Energy transfer and tunable luminescence properties in Y3Al2Ga3O12: Tb3+, Eu3+ phosphors
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Y3Al2Ga3O12: Tb3、Eu3 荧光粉的能量转移和可调发光特性
DOI：
10.1016/j.jallcom.2019.02.154
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发表时间：
2019-05-30
影响因子：
6.2
通讯作者：
Hu, Yihua
中科院分区：
文献类型：
--
作者：
Li, Zhenzhang;Zhong, Biliang;Hu, Yihua
本文采用高温固相反应法制备了热稳定性好、发光性能可调的Y3Al2Ga3O12：Tb3+，Eu3+发光材料。用第一性原理方法分析了Y3Al2Ga3O12：Tb3+，Eu3+的电子结构、能带结构、态密度和形成能。获得了高浓度猝灭(x=0.5和y=0.7)的Y-3-xAl(2)Ga(3)O(12)：XTb(3+)和Y-3-YAl(2)Ga(3)O(12)：YEu(3+)的高发光输出。研究了Tb~(3+)向Eu~(3+)的能量传递对发光色调和发光热稳定性的影响。通过调节Tb3+/Eu3+的比例，Tb3+向Eu3+的能量转移效率高达74.2%，并可实现绿、黄、红三种颜色的调谐。此外，Y3Al2Ga3O12：Tb3+，Eu3+荧光粉表现出良好的热稳定性，其中发射强度在150℃时仍保持60%。(C)2019 Elsevier B.V.版权所有。
This paper demonstrates that a highly thermal stable and tunable-luminescence phosphors Y3Al2Ga3O12: Tb3+, Eu3+ with efficient energy transfer, which is prepared by the high-temperature solid-state reaction. First-principles method is performed to analyze the electronic structures, band structure, density of states and formation energy of Y3Al2Ga3O12: Tb3+, Eu3+. For high luminescence output, Y-3-xAl(2)Ga(3)O(12): xTb(3+) and Y-3-yAl(2)Ga(3)O(12): yEu(3+) with high concentration quenching (x = 0.5 and y = 0.7) are achieved. The effect of energy transfer from Tb3+ to Eu3+ on emission color tuning and luminescence thermal stability is studied. The energy transfer efficiency from Tb3+ to Eu3+ reaches as high as 74.2% and emission color can be tuned from green, yellow and red by adjusting the ratio of Tb3+/Eu3+. What's more, Y3Al2Ga3O12: Tb3+, Eu3+ phosphor exhibits a good thermal stability, of which emission intensity still keeps 60% at 150 degrees C. (C) 2019 Elsevier B.V. All rights reserved.