Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (8): 2108-2112.doi: 10.3866/PKU.WHXB201605091

• ARTICLE • Previous Articles     Next Articles

Effects of F- Concentration on the Morphologies and Fluorescent Lifetimes of Ln3+-Doped Up-Conversion Nanocrystals

Shan-Shan LIU1,2,Zheng XU1,2,*(),Su-Ling ZHAO1,2,Zhi-Qin LIANG1,2,Wei ZHU1,2   

  1. 1 Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education, Beijing 100044, P. R. China;
    2 Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, P. R. China
  • Received:2016-03-07 Published:2016-07-29
  • Contact: Zheng XU E-mail:zhengxu@bjtu.edu.cn

Abstract:

Up-conversion luminescent NaYF4:Yb3+/Er3+ nanomaterials were synthesized using a solvo-thermal method. It was determined that the size, morphology, and luminescence intensity of these nanoparticles can be controlled by varying the concentration of fluoride ions. Low reactant concentrations were found to always result in monodisperse, hexagonal nanocrystals, and to gradually and uniformly decrease the size of the NaYF4 nanocrystals. In contrast, at higher concentrations, the nanocrystals grow to form a mixed phase. Fluoride ion concentrations over a specific range tend to promote the fluorescence emission of the material and may also significantly affect the fluorescent lifetime.

Key words: Up-conversion luminescent, Nanomaterial, NaYF4, Morphology control, Fluorescent llifetime

MSC2000: 

  • O649