Nanocrystalline Y3Al5O12:Ce phosphor-based white light-emitting diodes embedded with CdS:Mn/ZnS core/shell quantum dots

被引:55
作者
Kim, Jong-Uk [1 ]
Kim, Yong-Seog [1 ]
Yang, Heesun [1 ]
机构
[1] Hongik Univ, Dept Mat Sci & Engn, Seoul 121791, South Korea
关键词
Nanocrystalline Y3Al5O12:Ce; CdS:Mn/ZnS quantum dots; Color rendering index; White light emitting diodes;
D O I
10.1016/j.matlet.2008.12.001
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
120 nm-sized yellow emitting Y3Al5O12:Ce (YAG:Ce) nanocrystalline phosphors and 4.5 nm-sized orange emitting CdS:Mn/ZnS core/shell structured quantum dots (QDs) were prepared by a modified polyol and a reverse micelle chemistry, respectively. To compensate a poor color rendering index (CRI) of YAG:Ce nanophosphor-based white light-emitting diodes (LEDs) due to the lack of red spectral component, CdS:Mn/ ZnS QDs were blended into YAG:Ce nanophosphors. Blends of nanophosphors and QDs exhibited the prominent spectral evolution with an increasing content of QDs. A hybrid white LED, which combines a blue LED with the blend of nanophosphor and QDs with a weight ratio of 1:1 was demonstrated with an improved CRI value of 85. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:614 / 616
页数:3
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