Colloidal LaF3:Yb,Er, LaF3:Yb,Ho and LaF3:Yb,Tm nanocrystals with multicolor upconversion fluorescence

被引：241
|
作者：
Yi, GS [1 ]
Chow, GM
机构：
[1] Natl Univ Singapore, Singapore Massachusetts Inst Technol, Singapore 119260, Singapore
[2] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 119260, Singapore
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2005年 / 15卷 / 41期
关键词：
D O I：
10.1039/b508240d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The IR-to-visible upconversion fluorescent nanocrystals, Yb-Er, Yb-Ho and Yb-Tm co-doped LaF3 were chemically synthesized and investigated. The ligand-capped nanocrystals were easily dispersed in organic solutions and subsequently formed a transparent colloidal solution. Under 980 nm IR excitation, green, red and blue emission bands were observed from these colloidal solutions, respectively. Compared with the recently reported colloidal NaYF4:Yb,Er nanocrystals, our nanocrystals produced a fluorescence output which was 5 times higher. These nanocrystals have potential applications as bio- probes and displays.
引用
收藏
页码：4460 / 4464
页数：5
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