Luminescent properties of a new blue long-lasting phosphor Ca2P2O7:Eu2+, Y3+
Luminescent properties of a new blue long-lasting phosphor Ca2P2O7:Eu2+, Y3+
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DOI：
10.1016/j.matchemphys.2008.07.061
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发表时间：
2009-01
影响因子：
4.6
通讯作者：
R. Pang;Chengyu Li;Su Zhang;Q. Su
中科院分区：
文献类型：
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作者：
R. Pang;Chengyu Li;Su Zhang;Q. Su
采用高温固相反应法合成了Ca1.96P2O7：0.02Eu2+，0.02Y3+的焦磷酸盐长余辉发光材料。利用X射线衍射、光致发光、磷光和热释光光谱对其性质进行了系统的研究。该荧光粉发射蓝光，该蓝光与Eu 2+的5d-4f跃迁特征发射有关。对于优化后的样品，在去除激发源后6 h仍能观察到明亮的蓝色长余辉（LLP）。热释光光谱表明，Y ~（3+）离子的掺杂大大增强了335 K峰的强度，并在373 K附近产生了新的热释光峰，这也是蓝色LLP的原因。在此基础上，提出了利用Y ~（3+）离子作为电子陷阱来改善Eu ~（2+）蓝色磷光的发光强度和持续时间的方法。
A new pyrophosphate long-lasting phosphor with composition of Ca1.96P2O7:0.02Eu2+, 0.02Y3+is synthesized via the high-temperature solid-state reaction method. Its properties are systematically investigated utilizing XRD, photoluminescence, phosphorescence and thermoluminescence (TL) spectra. The phosphor emits blue light that is related to the characteristic emission of Eu2+due to 5d–4f transitions. For the optimized sample, bright blue long-lasting phosphorescence (LLP) could be observed by naked eyes even 6h after the excitation source is removed. The TL spectra show that the doping of Y3+ions greatly enhanced intensity of 335K peak and created new TL peak at about 373K that is also responsible for the blue LLP. Based on our study, Y3+ions are suggested to act as electron traps to improve the performance of the blue phosphorescence of Eu2+such as intensity and persistent time.