Hydrothermal Synthesis and Property of Rare Earth of Fluoride NaYF4:Er3+ Materials

High quality NaYF4 and NaYF4:Er3+ materials were prepared using EDTA-assisted hydrothermal method. The effects of doping of Er3+ on the shape of samples were discussed. The samples were characterized by X-ray powder diffraction (XRD), and scanning electron microscopy (SEM). XRD patterns show that the samples are hexagonal phase of NaYF4 and NaYF4:Er3+ with good crystallization. SEM images present that the samples of NaYF4 are homogeneous nanorods with a diameter of 342 nm and a length of 1043nm，the NaYF4:Er3+(5%) sample with a diameter of180.7nm and a length of 1220nm, and NaYF4:Er3+(10%) with a diameter of 139.4nm and a length of 939.9nm.The sizes of the NaYF4 and NaYF4:Er3+ nanoparticles are basically consistent with that calculated from XRD peak via the Scherrer equation.

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