Nanocrystalline Y3Al5O12:Ce phosphor-based white light-emitting diodes embedded with CdS:Mn/ZnS core/shell quantum dots
Nanocrystalline Y3Al5O12:Ce phosphor-based white light-emitting diodes embedded with CdS:Mn/ZnS core/shell quantum dots
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DOI：
10.1016/j.matlet.2008.12.001
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发表时间：
2009-03
影响因子：
3
通讯作者：
Jong-Uk Kim;Yong-Seog Kim;Heesun Yang
中科院分区：
文献类型：
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作者：
Jong-Uk Kim;Yong-Seog Kim;Heesun Yang
分别采用改性多元醇和反胶束化学法制备了120 nm黄光发射的Y3 Al 5 O 12：Ce（YAG：Ce）纳米晶荧光粉和4.5 nm橙光发射的橙子CdS：Mn/ZnS核壳结构量子点。为了弥补YAG：Ce纳米荧光粉基白色发光二极管（LED）由于缺乏红色光谱成分而导致的显色指数（CRI）差，将CdS：Mn/ZnS量子点混合到YAG：Ce纳米荧光粉中。随着量子点含量的增加，荧光粉和量子点的混合物表现出显著的光谱演化。混合白色LED，其将蓝色LED与纳米荧光粉和QD的混合物以1：1的重量比组合，被证明具有85的改进的CRI值。
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.