Enhanced luminescence of novel Ca3B2O6:Dy3+ phosphors by Li+-codoping for LED applications
Enhanced luminescence of novel Ca3B2O6:Dy3+ phosphors by Li+-codoping for LED applications
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通过 Li 共掺杂增强新型 Ca3B2O6:Dy3 荧光粉的发光性能，用于 LED 应用
DOI：
10.1016/j.ceramint.2011.08.032
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发表时间：
2012-03
影响因子：
5.2
通讯作者：
Lin, Liang-Wu
中科院分区：
文献类型：
--
作者：
Sun, Xin-Yuan;Zhang, Jun-Cheng;Liu, Xin-Gen;Lin, Liang-Wu
在1100°C空气中，采用固相反应法合成了Ca 3 − xB 2 O 6：xDy 3+（0.0≤x≤0.105）和Ca2.95−yDy0.05B2O6：yLi+（0≤y≤0.34）荧光粉。采用X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、光致发光激发光谱（PLE）和光致发光光谱（PL）对合成的荧光粉进行了表征。PLE谱表明，在300 ~ 400 nm处的激发峰是Dy ~（3+）的4f-4f跃迁。这种无汞激发可用于固态照明和发光二极管（LED）。在350 nm激发下，Dy ~（3+）离子的4F_9/2→ 6H_15/2跃迁产生480 nm的蓝光发射，4F_9/2→ 6H_13/2跃迁产生575 nm的黄光发射，4F_9/2→ 6H_11/2跃迁产生660 nm的红光发射。Ca 3 − xB 2 O 6：xDy 3+磷光体的最佳PL强度被发现为x=0.05。此外，来自Ca2.95-yDy0.05B2O6：yLi+磷光体的PL结果表明，Dy 3+发射可以随着共掺杂剂Li+含量的增加而增强，直到y=0.22。通过对白色光的模拟，研究的荧光粉的CIE可以通过改变Li+离子的含量来调节，当Li+离子的含量为y=0.22时，实现了最佳CIE值（0.300，0.298）。所有结果都意味着Ca2.95-yDy0.05 B2 O 6：yLi+荧光粉有可能用作白色LED。
The Ca3−xB2O6:xDy3+(0.0≤x≤0.105) and Ca2.95−yDy0.05B2O6:yLi+(0≤y≤0.34) phosphors were synthesized at 1100°C in air by solid-state reaction route. The as-synthesized phosphors were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), photoluminescence excitation (PLE) and photoluminescence (PL) spectra. The PLE spectra show the excitation peaks from 300 to 400nm is due to the 4f–4f transitions of Dy3+. This mercury-free excitation is useful for solid state lighting and light-emitting diodes (LEDs). The emission of Dy3+ions upon 350nm excitation is observed at 480nm (blue) due to the4F9/2→6H15/2transitions, 575nm (yellow) due to4F9/2→6H13/2transitions and a weak 660nm (red) due to4F9/2→6H11/2emissions, respectively. The optimal PL intensity of the Ca3−xB2O6:xDy3+phosphors is found to be x=0.05. Moreover, the PL results from Ca2.95−yDy0.05B2O6:yLi+phosphors show that Dy3+emissions can be enhanced with the increasing codopant Li+content till y=0.22. By simulation of white light, the CIE of the investigated phosphors can be tuned by varying the content of Li+ions, and the optimal CIE value (0.300, 0.298) is realized when the content of Li+ions is y=0.22. All the results imply that the Ca2.95−yDy0.05B2O6:yLi+phosphors could be potentially used as white LEDs.
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影响因子：
3.4
作者：
Qin, Chuanxiang;Huang, Yanlin;Seo, Hyo Jin
通讯作者：
Seo, Hyo Jin
影响因子：
4
作者：
Jung-Chul Park;H. Moon;Dong-kuk Kim;S. Byeon;Bong‐Chul Kim;K. Suh
通讯作者：
Jung-Chul Park;H. Moon;Dong-kuk Kim;S. Byeon;Bong‐Chul Kim;K. Suh
影响因子：
6.2
作者：
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通讯作者：
Q. Su;Z. Pei;L. Chi;Hongjie Zhang;Zhong L. Zhang;Feng Zou
影响因子：
3.5
作者：
Bergh, A;Craford, G;Haitz, R
通讯作者：
Haitz, R
影响因子：
1.8
作者：
Xiuai Lu;Z. You;Jian-fu Li;Zhao-jie Zhu;G. Jia;Yan Wang;Bai-chang Wu;C. Tu
通讯作者：
Xiuai Lu;Z. You;Jian-fu Li;Zhao-jie Zhu;G. Jia;Yan Wang;Bai-chang Wu;C. Tu