Enhanced forward efficiency of Y3Al5O12:Ce3+ phosphor from white light-emitting diodes using blue-pass yellow-reflection filter

被引：71

作者：

Oh, Jeong Rok ^{[1
]}

Cho, Sang-Hwan ^{[2
]}

Lee, Yong-Hee ^{[2
,3
]}

Do, Young Rag ^{[1
]}

机构：

[1] Kookmin Univ, Dept Chem, Seoul 136702, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea

[3] Korea Adv Inst Sci & Technol, Grad Sch Nanosci & Technol WCU, Taejon 305701, South Korea

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 09期

关键词：

RED PHOSPHOR;

D O I：

10.1364/OE.17.007450

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This paper reports a simple approach for the design of blue-excitation-light passing and phosphor-yellow-emission-light reflecting dielectric multilayers to recycle the backward emission of Y3Al5O12:Ce3+ (YAG:Ce) yellow phosphors on top of a blue InGaN light-emitting diode (LED) cup. The insertion of modified quarter-wave films of alternate high-and low-refractive index dielectric films (TiO2/SiO2) into the interface between a YAG: Ce phosphor layer and glass substrate resulted in 1.64 and 1.95 fold increase in efficiency and luminous efficacy of the forward white emission compared with that of a conventional phosphor on top of a blue LED cup with a lower correlated color temperature (< 4000K). (c) 2009 Optical Society of America

引用

页码：7450 / 7457

页数：8

共 18 条

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