稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
11期
1032-1036
,共5页
李东东%邵起越%董岩%蒋建清
李東東%邵起越%董巖%蔣建清
리동동%소기월%동암%장건청
NaYF4:Yb3+,Er3+%chemical synthesis%crystal growth%upconversion luminescence%rare earths
Hexagonal-phase NaYF4:Yb3+,Er3+upconversion nanoparticles (UCNPs) with a uniform size distribution were synthesized using rare-earth acetates as precursors. The effects of reaction temperature and time on the phase transition process of the UCNPs were systematically studied. Based on the evolution of particle morphology and phase with temperature and time, it could be concluded that the transition from cubic phase to hexagonal phase for NaYF4:Yb3+,Er3+UCNPs was consistent with a dissolution/recrystallization process. In addition, the shape and size of the UCNPs could be controlled by adjusting the solvent ratio and the precursor ratio, respectively.
