The development of silicate matrix phosphors with broad excitation band for phosphor-convered white LED
The development of silicate matrix phosphors with broad excitation band for phosphor-convered white LED
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DOI：
10.1007/s11434-008-0392-4
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发表时间：
2008-10-01
影响因子：
--
通讯作者：
Sun Fei
中科院分区：
文献类型：
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作者：
Luo XiXian;Cao WangHe;Sun Fei
本文综述了用于荧光粉覆盖白色LED的宽激发带碱土硅酸盐基质发光材料的研究进展。其中富Sr二元相（Sr，Ba，Ca，Mg）（2）SiO 4：Eu 2+和（Sr，Ba，Ca，Mg）（3）SiO 5：Eu 2+是蓝光LED芯片白色LED的优良荧光粉。它们具有非常宽的激发带，并在450-480 nm范围内表现出对蓝色辐射的强吸收。在InGaN蓝光LED芯片的照射下，它们分别呈现出绿色和黄橙色发光。InGaN基（Sr，Ba，Ca，Mg）（2）SiO 4：Eu 2+和（Sr，Ba，Ca，Mg）（3）SiO 5：Eu 2+的发光效率约为70-80 Im/W，约为InGaN基YAG：Ce的95%-105%，相关色温在4600-11000 K之间。三元碱土硅酸盐基质发光材料MO（M=Sr，Ca，Ba）-Mg（Zn）O-SiO2在370-440 nm范围内表现出对深蓝/近紫外辐射的强吸收。它们可以将深蓝色/近紫外线辐射转化为蓝色、绿色和红色辐射，从而产生白色光。该方法实现的高性能白光LED具有良好的色度和高显色性，避免了多种基质混合使用带来的应用缺陷。并对碱土硅酸盐荧光粉的应用前景和研究开发趋势进行了讨论。
This paper briefly reviews the recent progress in alkaline earth silicate host luminescent materials with broad excitation band for phosphor-convered white LED. Among them, the Sr-rich binary phases (Sr, Ba, Ca, Mg)(2)SiO4:Eu2+ and (Sr, Ba, Ca, Mg)(3)SiO5:Eu2+ are excellent phosphors for blue LED chip white LED. They have very broad excitation bands and exhibit strong absorption of blue radiation in the range of 450-480 nm. And they exhibit green and yellow-orange emission under the InGaN blue LED chip radiation, respectively. The luminous efficiency of InGaN-based (Sr, Ba, Ca, Mg)(2)SiO4:Eu2+ and (Sr, Ba, Ca, Mg)(3)SiO5:Eu2+ is about 70-80 Im/W, about 95%-105% that of the InGaN-based YAG:Ce, while the correlated color temperature is between 4600-11000 K. Trinary alkaline earth silicate host luminescent materials MO(M=Sr, Ca, Ba)-Mg(Zn)O-SiO2 show strong absorption of deep blue/near-ultraviolet radiation in the range of 370-440 nm. They can convert the deep blue/near-ultraviolet radiation into blue, green, and red emissions to generate white light. The realization of high-performance white-light LEDs by this approach presents excellent chromaticity and high color rendering index, and the application disadvantages caused by the mixture of various matrixes can be avoided. Moreover, the application prospects and the trends of research and development of alkaline earth silicate phosphors are also discussed.