title: Synthesis of water dispersible hexagonal-phase NaYF4:Yb, Er nanoparticles with high efficient upconversion fluorescence.
abstract: Yb3+ and EP(3+)-codoped hexagonal-phase NaYF4 nanoparticles are synthesized by a simple, safe, and cost-effective method. The results of X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) show that the as-synthesized nanoparticles are in good accordance with the standard beta-NaYF4 with an average diameter of 60 nm after silica coating. The upconversion luminescence of prepared material under 980 nm excitation is detected, and the luminescence mechanism is discussed.
authors.forename: Yue
authors.initials: Y
authors.lastname: Cui
authors.forename: Suling
authors.initials: S
authors.lastname: Zhao
authors.forename: Meng
authors.initials: M
authors.lastname: Han
authors.forename: Panlai
authors.initials: P
authors.lastname: Li
authors.forename: Ligang
authors.initials: L
authors.lastname: Zhang
authors.forename: Zheng
authors.initials: Z
authors.lastname: Xu