White light emission from blue and near ultraviolet light-emitting diodes precoated with a Sr3SiO5:Ce3+, Li+ phosphor
White light emission from blue and near ultraviolet light-emitting diodes precoated with a Sr3SiO5:Ce3+, Li+ phosphor
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DOI：
10.1364/ol.32.003444
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发表时间：
2007-12-01
期刊：
影响因子：
3.6
通讯作者：
Jeon, Duk Young
中科院分区：
文献类型：
--
作者：
Jang, Ho Seong;Jeon, Duk Young
通过将黄色Sr 3SiO 5：Ce 3+，Li+磷光体分别与蓝色发光二极管（LED）（460 nm芯片）或近紫外（n-UV）LED（405 nm芯片）组合来制造白光发光二极管（WLED）。基于Sr 3SiO 5：Ce 3+，Li+的WLED的色温（T-c）可以从6500到100，000 K（蓝光LED泵浦）和从4900到50，000 K（n-UV LED泵浦）调谐，而不与其他磷光体混合。蓝光LED泵浦的WLED在20 mA下显示出优异的白色光（发光效率=31.7 lm/W，Tc = 6857 K）。这种WLED显示出稳定的色坐标属性对正向电流的增加。n-UV LED泵浦的WLED在20 mA下也显示出明亮的白色光（25.0 lm/W，5784 K）。(C)2007年，美国光学学会。
White-light-emitting diodes (WLEDs) were fabricated by combining a yellow Sr3SiO5:Ce3+, Li+ phosphor with a blue light-emitting diode (LED) (460 nm chip) or a near ultraviolet (n-UV) LED (405 nm chip), respectively. Color temperature (T-c) of Sr3SiO5:Ce3+, Li+-based WLEDs could be tuned from 6500 to 100,000 K (blue LED pumping) and from 4900 to 50,000 K (n-UV LED pumping) without mixing with other phosphors. The blue LED-pumped WLED showed excellent white light (luminous efficiency=31.7 lm/W, T-c = 6857 K) at 20 mA. This WLED showed a stable color coordinates property against an increase of the forward current. An n-UV LED-pumped WLED also showed bright white light (25.0 lm/W, 5784 K) at 20 mA. (C) 2007 Optical Society of America.