Synthesis and Upconversion Luminescence of NaYF4:Yb3+,Tm3+/TiO2 Nanocrystal Colloidal Solution

被引：13

作者：

Xue, Xiao-Jie ^{[1
]}

Qin, Weiping ^{[1
]}

Zhang, Dai-Sheng ^{[1
]}

Zhao, Dan ^{[1
]}

Wei, Guo-Dong ^{[1
]}

Zheng, Ke-Zhi ^{[1
]}

Wang, Li-Li ^{[1
]}

Wang, Guo-Feng ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Peoples R China

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2010年 / 10卷 / 03期

基金：

美国国家科学基金会;

关键词：

Luminescence; NaYF4; Nanocrystal; Upconversion; EMISSION; NAYF4-YB; ER; YB3+; ER3+; TM3+; LAF3;

D O I：

10.1166/jnn.2010.2133

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

NaYF4:Yb3+,Tm3+ upconversion nanocrystals were synthesized with oleic acid as a capping ligand. The as-prepared samples were redispersed in cyclohexane, forming transparent and stable solutions which perform bright blue upconversion. Inducing TiO2 as the outer layer of the fluoride cores, we investigated the effect of TiO2 on the upconversion process. The transmission electron microscopy (TEM) analysis indicated that titania successfully formed a coating layer on the surface of NaYF4:Yb3+,Tm3+ nanoparticles, and the average diameters of the NaYF4:Yb3+,Tm3+ nanocrystals and the NaYF4:Yb3+,Tm3+/TiO2 nanoparticles are about 14 and 40 nm, respectively. Under the excitation of a 980 nm laser, NaYF4:Yb3+,Tm3+ nanocrystals and TiO2-coated NaYF4:Yb3+,Tm3+ core/shell structure sample exhibited distinct upconversion luminescent properties.

引用

页码：2028 / 2031

页数：4

共 23 条

[1] Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline β-NaGdF4:Yb3+, Er3+ [J].