Core-shell structured fluorescence granular material with adjustable luminescence and preparation method thereof

Abstract

The invention relates to a Y2O3:Eu-LnPO4 fluorescent particle material of kernel-housing structure with adjustable light emission. The kernel material is selected from a Y2O3:Eu fluorescent material capable of emitting red light, and the housing material is selected from an LnPO4 fluorescent material capable of emitting green light, wherein the kernel has a size within 4 to 8 mum, and the molar ratio of the Y2O3:Eu material to the LnPO4 material is 1:0.4 to 1:2. The preparation method comprises the following steps: adding a rear earth ion mixture solution for preparing the housing material into a sodium tripolyphosphate solution dropwise, adding the Y2O3:Eu micrometer particles as the kernel, growing the LnPO4 housing layer on the kernel of the Y2O3:Eu micrometer particles, cooling, filtering, cleaning, vacuum drying and collecting the product. The preparation process is simple, and the Y2O3:Eu-LnPO4 fluorescent particle material has stable and adjustable light emission.

Description

technical field [0001] The invention relates to a rare earth compound fluorescent material, in particular to a Y with adjustable luminescence 2 o 3 : Eu-LnPO 4 Fluorescent particle material with core-shell structure and preparation method thereof. Background technique [0002] Among fluorescent materials, rare earth compound fluorescent materials have attracted much attention because of their wide variety and excellent performance. In the rare earth compound fluorescent materials, the research on the multi-component rare earth oxide matrix system is dominant, Martinez-Rubio, M.I.; Ireland, T.G.; Fern, G.R.; Silver, J.; Snowden, M.J., A New Application for Microgels: Novel Method for the Synthesis of Spherical Particles of the Y2O3: Eu Phosphor Using a Copolymer Microgel of NIPAM and Acrylic Acid, LANGMUIR, 2001, 17(22): 7145-7149, but the color of light emitted by these rare earth fluorescent materials is often single , Ronda, C.R.; Jüstel T.; Nikol H., Rare earth phosph...

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Problems solved by technology

Han, M.; Gao, X.; Su, J.Z.; Nie S., Quantum-dot-tagged microbeads for multiplexed optical coding of biomolecules, NATURE BIOTECHNOLOGY, 2001, 19:631-635., in the above two types of core-shell structures , the outer shell is non-luminescent auxiliary material, and the change of luminescence depends on changing the particle size or quantity of the inner luminescent material. The preparation methods of these materials are difficult and are not suitable for large-scale industrial production.

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