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1. 南京工业大学 材料化学工程国家重点实验室,江苏 南京,210009
2. 南京工业大学 电光源材料研究所, 江苏 南京 210015
纸质出版日期:2010-6-30,
网络出版日期:2010-6-30,
收稿日期:2009-7-11,
修回日期:1900-1-2,
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张瑞西;王海波;黄如喜;谢 晔;林海凤. LED红色发光粉的制备及封装性能[J]. 发光学报, 2010,31(3): 305-310
ZHANG Rui-xi;WANG Hai-bo;HUANG Ru-xi;XIE Ye;LIN Hai-feng. Preparation and Package Performances of Red Phosphor for LED[J]. 发光学报, 2010,31(3): 305-310
实验采用碳酸锂、氧化钨、氧化铕制备了LiEuW
2
O
8
发光粉
通过扫描电镜和光谱仪分别研究了它的形貌与光谱特征。结果显示:LiEuW
2
O
8
发光粉的激发光谱较宽
非常适合于近紫外、蓝光及绿光芯片
发射光谱峰值位于615 nm
色坐标为(
x=0.666
y
=0.331);球磨对它的形貌影响非常明显。为了比较硫化物发光粉和LiEuW
2
O
8
发光粉的性能
分别对他们进行了封装实验
结果显示:LiEuW
2
O
8
发光粉能够有效降低色温
更重要的是
它对光效影响较小
4 000 K时
光效可以保持在60 lm/W以上。
LiEuW
2
O
8
phosphor was prepared with lithium carbonate
europium oxide and tungsten oxide. The spectral properties and morphology were exhibited by fluorescence spectrometer and SEM
respectively. The result showed that there is a wide excitation spectrum of this phosphor being suitable for LED chips with near-ultraviolet(NUV)
blue or green emission. Its emission peak locates at 615 nm
and the emission chromaticity coordinates are
x
=0.666
y
=0.331; Milling obviously impacts on its morphology. Sulfide phosphor and LiEuW
2
O
8
phosphor were encapsulated
respectively
to compare their properties
the result showed that the latter can also decrease color temperature
and more importantly
the luminous efficiency is less affected
it can keep 60 lm/W above when color temperature is 4 000 K.
LiEuW2O8白光LED封装色温
LiEuW2O8white LEDpackagecolor temperature
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. Gao Fei, Liang Lifang, Guo Chongfeng. Preparation and luminescence of red ligth-emitting phosphors based on Li3Ba2Ln3-x- (MoO4)8 by sol-gel method [J]. Chin. J. Lumin.(发光学报), 2009, 30 (5):610-616 (in Chinese).
. Qi Faxin, Wang Haibo, Zhu Xianzhong. Spherical YAG ∶ Ce3+ phosphor particles prepared by spray pyrolysis [J]. J. Rare Earth, 2005, 23 (4):892-895.
. Hu Yunsheng, Ye Hongqi, Zhuang Weidong, et al. Influence of Sr/Ca ratio on red phosphor Ca1-xSr<em>xS ∶ Eu2+ [J]. J. Chin. Rare Earth Soc. (中国稀土学报), 2004, 22 (6):854-858 (in Chinese).
. Teng Xiaoming, Zhuang Weidong, Hu Yunsheng, et al. Luminescence properties of nitride red phosphor for LED [J]. J. Rare Earth, 2008, 26 (5):652-655.
. Oliver Oeckler, Florian Stadler, Tobias Rosenthal, et al. Real structure of SrSi2O2N2 [J]. Solid State Sciences, 2007, 9 (2):205-212.
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