Solvothermal Route to Colloidal Upconverting NaYF4: Yb3+/Er3+ and Yb3+/Tm3+ Nanocrystals

被引：3
|
作者：
Chen, Shi [1 ,2 ]
Wang, Shiwei [1 ]
Zhang, Jian [1 ]
An, Liqiong [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2009年 / 9卷 / 03期
关键词：
Solvothermal Synthesis; Sodium Yttrium Fluoride; Crystalline; UP-CONVERSION LUMINESCENCE; HEXAGONAL-PHASE; SINGLE-CRYSTAL; NAYF4-YB; ER; LANTHANIDE; ER3+; SIZE;
D O I：
10.1166/jnn.2009.422
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Monodispersed nanocrystals of NaYF4: Yb3+, Er3+/Tm3+ that exhibited a high luminescence intensity were chemically synthesized by a non-aqueous solvothermal approach. These nanocrystals were easily dispersed in non-polar solvent and subsequently formed a transparent colloidal solution. Under 980 nm NIR excitation, green and blue emissions were observed from colloidal solutions of the NaYF4: Yb3+, Er3+/Tm3+, respectively. The effects of different solvents used and solvent concentration on the shape, size and size distribution of the nanocrystals have been investigated. It has been revealed that the doping ions diffused into NaYF4 lattice, and they formed a solid solution. The fluorescence photos, spectra, luminescence mechanism, and the formation mechanism of the nanocrystals have also been demonstrated. Emission spectrums of the nanocrystals prepared by this method show much more complicated emission peaks than by other methods.
引用
收藏
页码：1942 / 1946
页数：5
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