A nearly ideal phosphor-converted white light-emitting diode
A nearly ideal phosphor-converted white light-emitting diode
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DOI：
10.1063/1.2901378
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发表时间：
2008-04-07
影响因子：
4
通讯作者：
Steckl, Andrew J.
中科院分区：
文献类型：
--
作者：
Allen, Steven C.;Steckl, Andrew J.
获得了接近理想的蓝白转换损耗仅为1%的荧光粉转换发光二极管。这是通过使用内反射来引导磷光发射远离有损表面、具有高反射率的反射器材料和具有(1)单位量子效率(ETA(Q))、(2)均匀折射率以最小化散射、以及(3)与封装匹配的折射率以消除全内反射的远程有机磷光体来实现的。还报道了一种具有近乎均匀的折射率的无机复合荧光粉，以最小化发射光的漫射散射，从而最大化有效的荧光粉ETA(Q)和光提取。(C)2008年美国物理研究所。
A phosphor-converted light-emitting diode was obtained with nearly ideal blue-to-white conversion loss of only 1%. This is achieved using internal reflection to steer phosphor emission away from lossy surfaces, a reflector material with high reflectivity, and a remotely located organic phosphor having (1) unity quantum efficiency (eta(q)), (2) homogeneous refractive index to minimize scattering, and (3) refractive index-matched to the encapsulation to eliminate total internal reflection. An inorganic composite phosphor is also reported with a nearly homogeneous refractive index to minimize diffuse scattering of emitted light, thereby maximizing the effective phosphor eta(q) and light extraction. (C) 2008 American Institute of Physics.