Luminescence and energy transfer properties of single-component Mg0.5Ti2(PO4)3:Dy3+, Eu3+ for warm white UV LEDs
Luminescence and energy transfer properties of single-component Mg0.5Ti2(PO4)3:Dy3+, Eu3+ for warm white UV LEDs
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DOI：
10.1016/j.jallcom.2017.01.247
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发表时间：
2017-04-25
影响因子：
6.2
通讯作者：
Liu, Hongmei
中科院分区：
文献类型：
--
作者：
Wang, Jiyou;Feng, Yang;Liu, Hongmei
采用固相反应法在常压下制备了Mg 0. 5 Ti 2（PO 4）（3）：Dy 3 +/Eu 3+荧光粉。通过X射线衍射、光致发光、激发光谱和发射光谱对荧光粉进行了表征。XRD分析表明，Dy 3+和Eu 3+可以有效地掺杂到Mg 0. 5 Ti 2（PO 4）（3）基质中。Dy 3+在Mg0.5Ti2（PO 4）（3）基质中的浓度猝灭机制为偶极-偶极相互作用。随着Eu ~（3+）掺杂浓度的增加，Dy ~（3+）的发光强度和衰减寿命逐渐减小，说明在Mg_（0.5）Ti_2（PO_4）（3）基质中存在Dy ~（3+）向Eu ~（3+）的能量传递。结果表明，Dy ~（3+）的F-4（9/2）能级通过偶极-偶极相互作用向Eu ~（3+）的D-5（0）能级转移能量。此外，Eu ~（3+）离子的引入提高了相关色温。实验表明，Mg0.5-x-yTi_2（PO_4）（3）：xDy（3+），yEu（3+）荧光粉是一种很有前途的暖白色紫外发光二极管材料。(C)2017爱思唯尔B. V.保留所有权利。
Mg0.5Ti2(PO4)(3):Dy3+/Eu3+ phosphors were prepared via solid-state reaction method under normal ambient air. The phosphors were characterized by X-ray, photoluminescence excitation and emission spectra. The XRD patterns showed that Dy3+ and Eu3+ could be effectively doped into the Mg0.5Ti2(PO4)(3) host. The concentration quenching mechanism of Dy3+ in the Mg0.5Ti2(PO4)(3) host was proven to be dipole-dipole interaction. The emission intensity and the decay lifetime of Dy3+ decreased with the increase of Eu3+ concentration, which proved the existence of the energy transfer from Dy3+ to Eu3+ in the Mg0.5Ti2(PO4)(3) host. It was found that the energy was transferred from F-4(9/2) level of Dy3+ to the D-5(0) level of Eu3+ by dipole-dipole interaction. Besides, the correlated color temperature is improved with the introduction of Eu3+ ions. The experiment presents that Mg0.5-x-yTi2(PO4)(3):xDy(3+), yEu(3+) phosphors are promising materials for warm white UV LEDs. (C) 2017 Elsevier B.V. All rights reserved.