期刊
JOURNAL OF RARE EARTHS
卷 32, 期 11, 页码 1032-1036出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(14)60179-4
关键词
NaYF4:Yb3+,Er3+; chemical synthesis; crystal growth; upconversion luminescence; rare earths
资金
- National Natural Science Foundation of China [51302038]
- Natural Science Foundation of Jiangsu Province of China [BK2011064, BK2012346]
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.
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