Luminescence properties of a new greenish blue emitting phosphor Na5Ca4(PO4)4F:Eu2+
Luminescence properties of a new greenish blue emitting phosphor Na5Ca4(PO4)4F:Eu2+
复制标题
新型绿蓝色荧光粉Na5Ca4(PO4)4F:Eu2的发光特性
DOI：
10.1016/j.jallcom.2012.04.042
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发表时间：
2012-09
影响因子：
6.2
通讯作者：
庄佳庆
中科院分区：
文献类型：
--
作者：
夏志国;廖立兵;周珺;庄佳庆
采用传统的固相反应法合成了一种新型的蓝绿色荧光粉Na 5Ca 4（PO 4）4F：Eu 2+，并用X射线粉末衍射（XRD）技术对其物相结构进行了表征。光致发光（PL）结果表明，该荧光粉能被波长为250- 410 nm的紫外光有效激发，在365 nm的紫外光照射下，荧光粉发出明亮的蓝绿色荧光。发射光谱显示出中心位于500 nm的单一宽带，对应于Eu 2+的4f 65 d1 → 4f 7跃迁。在Na_5Ca_4（PO_4）_4F：xEu ~（2+）体系中，Eu ~（2+）离子的浓度依赖性发光特性表明，Eu ~（2+）离子之间存在偶极-偶极相互作用。临界能量传递距离约为19.8 μ m。该荧光粉具有良好的热稳定性，其热猝灭激活能为0.45eV。在365 nm激发下，Na 5Ca 4（PO 4）4F：0.01Eu2+荧光粉的量子效率为76%，这表明该荧光粉在白色发光二极管（LED）荧光粉中具有很好的应用前景。
A novel greenish blue emitting phosphor, Na5Ca4(PO4)4F:Eu2+, was synthesized by a conventional solid-state reaction, and its phase formation was confirmed by using the X-ray powder diffraction (XRD) technique. The photoluminescence (PL) results showed that the phosphor could be efficiently excited by ultraviolet (UV) light at wavelength of 250–410nm, and it exhibited bright greenish blue emission under 365nm UV light. The emission spectrum showed a single broad band centered at 500nm, corresponding to the 4f65d1→4f7transition of Eu2+. Eu2+concentration dependent PL properties in Na5Ca4(PO4)4F:xEu2+indicated that there was a dipole–dipole interaction of Eu2+ions. The critical energy-transfer distance was around 19.8Å. Furthermore, this phosphor had good thermal stability and its thermal quenching activation energy was 0.45eV. The measured quantum efficiency of Na5Ca4(PO4)4F:0.01Eu2+phosphor under 365nm excitation is 76%, which means that the present phosphor is promising in the white light emitting diodes (LEDs) phosphors.
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DOI：
10.1007/s00340-009-3648-z
发表时间：
2009
期刊：
Applied Physics B
影响因子：
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作者：
F. Ren;D. H. Chen
通讯作者：
F. Ren;D. H. Chen
影响因子：
3
作者：
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通讯作者：
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影响因子：
3.9
作者：
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通讯作者：
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DOI：
10.1016/j.mseb.2010.01.045
发表时间：
2010-03
影响因子：
3.6
作者：
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通讯作者：
Chia-Hao Hsu;R. Jagannathan;Chung‐Hsin Lu
影响因子：
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作者：
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