2D SiNx photonic crystal coated Y3Al5O12:Ce3+ ceramic plate phosphor for high-power white light-emitting diodes

被引：44
作者：
Park, Hoo Keun [1 ]
Oh, Jeong Rok [1 ]
Do, Young Rag [1 ]
机构：
[1] Kookmin Univ, Dept Chem, Seoul 136702, South Korea
来源：
OPTICS EXPRESS | 2011年 / 19卷 / 25期
基金：
新加坡国家研究基金会;
关键词：
FILM PHOSPHORS; LUMINESCENCE; BLUE; BRIGHTNESS; EFFICIENCY; LASER;
D O I：
10.1364/OE.19.025593
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
This paper reports the optical effects of a two-dimensional (2D) SiNx photonic crystal layer (PCL) on Y3Al5O12:Ce3+ (YAG:Ce) yellow ceramic plate phosphor (CPP) in order to enhance the forward emission of YAG: Ce CPP-capped high-power white light-emitting diodes (LEDs). By adding the 2D SiNx PCL with a 580 nm lattice constant, integrated yellow emission was improved by a factor of 1.72 compared to that of a conventional YAG: Ce CPP capped on a blue LED cup. This enhanced forward yellow emission is attributed to increased extraction of yellow emission light and improved absorption of blue excitation light through Bragg scattering and/or the leaky modes produced by the 2D PCLs. The introduction of 2D PCL can also reduce the wide variation of optical properties as a function of both ambient temperature and applied current, compared to those of a high-power YAG: Ce CPP-capped LED. (C) 2011 Optical Society of America
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页码：25593 / 25601
页数：9
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