Robust thermal performance of Sr2Si5N8:Eu2+: An efficient red emitting phosphor for light emitting diode based white lighting
Robust thermal performance of Sr2Si5N8:Eu2+: An efficient red emitting phosphor for light emitting diode based white lighting
复制标题
DOI：
10.1063/1.3666785
复制
发表时间：
2011-12-12
影响因子：
4
通讯作者：
DenBaars, Steven P.
中科院分区：
文献类型：
--
作者：
Brinkley, Stuart E.;Pfaff, Nathan;DenBaars, Steven P.
固态照明技术出现的一个重要组成部分是无机晶体荧光粉的发展，用于将光子从蓝色发光二极管（led）有效地转换为其他可见波长，以获得更大的显色性和“更温暖”的白色照明。我们介绍了最近开发的稀土掺杂氮基红色发光荧光粉Sr2Si5N8:Eu2+与gan基蓝色发光led和YAG:Ce荧光粉结合的结果，以改善白色照明应用。在所有测试中使用了一种独特的远程荧光粉封装方法，以将LED性能与荧光粉性能隔离开来。将YAG: Ce与红色荧光粉混合后，光效为94 lm/W，显色指数（CRI）为72。Sr2Si5N8:Eu2+红色发光荧光粉具有较低的温度敏感性（在150℃时仅降低28%的功率），并且相对于其他典型的红色发光荧光粉，在低浓度的包封剂中具有更高的发光性能。(C) 2011年美国物理研究所。(doi: 10.1063/1.3666785)
An important component to the advent of solid state lighting technology is the development of inorganic crystalline phosphors for efficient conversion of photons from blue light emitting diodes (LEDs) to other visible wavelengths for greater color rendering and "warmer" white lighting. We present the results of a recently developed rare earth doped nitride-based red emitting phosphor, Sr2Si5N8:Eu2+, combined with GaN-based blue emitting LEDs and YAG:Ce phosphor for improved white lighting applications. A unique remote phosphor packaging approach was used in all testing to isolate LED performance from phosphor performance. Luminous efficacies were achieved at 94 lm/W with an improved color rendering index (CRI) of 72, mixing red phosphor with YAG: Ce. The Sr2Si5N8:Eu2+ red emitting phosphor was found to have a low temperature sensitivity (only 28% power reduction at 150 degrees C) and greater luminous performance at low concentrations in the encapsulant by weight relative to other typical red emitting phosphors. (C) 2011 American Institute of Physics. [doi:10.1063/1.3666785]