Persistent luminescence in Ba5(PO4)3Cl:Eu2+,R3+ (R = Y, La, Ce, Gd, Tb and Lu)
Persistent luminescence in Ba5(PO4)3Cl:Eu2+,R3+ (R = Y, La, Ce, Gd, Tb and Lu)
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DOI：
10.1016/j.materresbull.2013.03.022
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发表时间：
2013-07
影响因子：
5.4
通讯作者：
G. Ju;Yihua Hu;Li Chen;Xiaojuan Wang;Z. Mu
中科院分区：
文献类型：
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作者：
G. Ju;Yihua Hu;Li Chen;Xiaojuan Wang;Z. Mu
我们研究了铕掺杂的氯磷灰石钡在与辅助稀土离子共掺杂后的持续发光。系统地研究了荧光粉的发光特性，包括光致发光、发光衰减和热致发光。我们根据实验结果制定了持久发光模型。在我们的模型中，一些Eu2+离子在短时紫外激发下被氧化成Eu3+，释放的电子被捕获在正缺陷处。持久发光是由这些捕获的电子与光离子化的 Eu3+ 离子的重组产生的。从离子势和离子半径方面讨论了辅助共掺杂剂的影响。最终，对持续发光的浓度猝灭进行了报道和讨论。
We investigated the persistent luminescence in europium-doped barium chloroapatite upon codoping with auxiliary rare earth ions. Luminescence properties of the phosphors, including photoluminescence, luminescence decay, and thermoluminescence are systematically studied. We formulated a model of persistent luminescence on the basis of the experimental results. In our model, some Eu2+ions are oxidized to Eu3+under short UV excitation, and the released electrons are trapped at the positive defect. The persistent luminescence arises from the recombination of these trapped electrons with the photo-ionized Eu3+ions. The influence of auxiliary codopants was discussed in terms of ionic potential and ionic radius. Eventually, the concentration quenching of persistent luminescence was reported and discussed.