title: Synthesis of complex rare earth fluoride nanocrystal phosphors.
abstract: Complex rare earth fluoride (NaRF(4), R = Ce,Y,Gd) nanocrystals of 30-50 nm were synthesized by hydrothermal and solvothermal techniques. The size, morphology and phase transition of the complex rare earth fluorides are discussed as the effects of different solvents, reaction time and temperature. Hexagonal phase NaRF(4) nanocrystals with good dispersibility can be prepared in the presence of EDTA using ethanol as the solvent. After doping with Yb(3+), Er(3+); Yb(3+), Tm(3+), and Eu(3+), some typical up-conversion and down-conversion photoluminescence was characterized and discussed.
authors: Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
authors: Jing Hui
authors: JH
authors: Zeng
authors: Zhi Hua
authors: ZH
authors: Li
authors: Ji
authors: J
authors: Su
authors: Leyu
authors: L
authors: Wang
authors: Ruoxue
authors: R
authors: Yan
authors: Yadong
authors: Y
authors: Li