Improving Optical Properties of White LED Fabricated by a Blue LED Chip with Yellow/Red Phosphors
Improving Optical Properties of White LED Fabricated by a Blue LED Chip with Yellow/Red Phosphors
复制标题
DOI：
10.1149/1.3465654
复制
发表时间：
2010-01-01
影响因子：
3.9
通讯作者：
Liu, R. S.
中科院分区：
文献类型：
--
作者：
Lin, C. C.;Zheng, Y. S.;Liu, R. S.
白光发光二极管 (LED) 是通过将 InGaN 基蓝光 LED 芯片与高发光磷光体 Y3Al5O12:Ce3+ (YAG:Ce) 和 CaSiAlN3:Eu2+ 结合而成。这些荧光粉的热稳定性在很大程度上取决于成分和活化剂浓度，在很宽的温度范围（25-300 摄氏度）内保持较高的热稳定性。当将 YAG:Ce 和 CaSiAlN3:Eu2+ 的混合物涂覆在蓝光 LED 上时，所得白光 LED 具有 eta(L) = 68 lm/W 的高发光效率、Ra = 93 的高显色指数和 T-C = 3007 K（50 mA 时）的色温。此外，白光 LED 的色坐标 Ra 和 T-C 在施加电流发生明显变化时往往保持恒定。 (C) 2010 年电化学协会。 [DOI:10.1149/1.3465654] 保留所有权利。
White light-emitting diodes (LEDs) were fabricated by associating an InGaN-based blue LED chip with highly luminescent phosphors, Y3Al5O12:Ce3+ (YAG:Ce) and CaSiAlN3:Eu2+. The thermal stability of these phosphors, depending weakly on the composition and the activator concentration, remains high over a wide range of temperatures (25-300 degrees C). When a mixture of YAG:Ce and CaSiAlN3:Eu2+ was coated on a blue LED, the resultant white LED had a high luminous efficiency of eta(L) = 68 lm/W, a high color rendering index of Ra = 93, and a color temperature of T-C = 3007 K (at 50 mA). Additionally, the color coordinates, Ra and T-C, of the white LED tend to remain constant against an appreciable variation in applied current. (C) 2010 The Electrochemical Society. [DOI:10.1149/1.3465654] All rights reserved.