Large scale preparation of up- converting YF3:YbEr nanocrystals with various sizes by solvothermal syntheses using ionic liquid bmimCl

Simple approach to prepare various sizes of YF 3 :YbEr nanocrystals in large quantities and their up-converting abilities dependent on preparation times and sodium content are described in this paper. Ionic liquid bmimCl was used in the role of a solvent and NaBF 4 as a fluorination agent. Prepared nanocrystals were characterized by XRD, TEM and up-conversion measurements. The method is suitable for preparation of large quantities of nanocrystals and could be easily adapted and used for relevant important pharmaceutical applications.