Synthesis of colloidal LaF3： 0.04Yb^3＋, 0.01Er^3＋ nanocrystals with green upconversion luminescence

• Published in: Journal of rare earths Vol. 26; no. 1; pp. 40 - 43
• Main Author: 王艳 秦伟平 张继森 曹春燕 张继双 金叶
• Format: Journal Article
• Language: English
• Published: 2008
• Subjects: 分析方法; 发光材料; 稀土元素; 胶质体
• ISSN: 1002-0721; 2509-4963

A synthesis of LaF3：0.04Yb^3＋,0.01Er^3＋ nanocrystals with oleic acid as a capping ligand was presemed. The X-Ray Diffraction （XRD） pattern indicated that the power was a single hexagonal phase. Transmission Electron Microscopy （TEM） demonstrated that the average size of the nanocrystals was less than 10 nm, with a narrow size distribution. The nanocrystals were dispersible in nonpolar solvents and form a fully transparent colloidal solution, and the solution was stable for several months without any aggregates. The Yb^3＋-Er^3＋ codoped nanocrystal colloidal solution exhibited a bright green upconversion fluorescence under 980 nm excitation from a diode laser. The nanocrystals were potentially applicable in biolabeling and bioimaging.