Preparation method of red-green-blue blended white light phosphor

Abstract

The invention relates to a preparation method of red-green-blue blended white light phosphor, which adopts europium chloride, terbium chloride, and beryllium sulfate as raw materials, and comprises the following steps: firstly preparing red, green, and blue rare earth complexes, then preparing red, green, and blue monochromatic polymers, finally blending the red, green, and blue monochromatic polymers in proportion to synthesize the white light phosphor; the preparation method is advanced in process, detailed and accurate in data; the white light phosphor has high luminous efficiency, and good luminous purity, has color coordinates of x=0.3253 and y=0.3301, and emits white light; the preparation method can effectively prevent the quenching phenomenon during doping, and is an ideal method for preparing white light rare earth phosphor.

Description

Technical field [0001] The invention relates to a method for preparing red, green and blue blended white phosphors, and belongs to the technical field of preparation and application of luminescent materials. Background technique [0002] White LED light-emitting diodes have the advantages of small size, low energy consumption, and long life. They are called the fourth-generation green light source and have been applied in industrial fields and civilian products. There are two main ways to synthesize white light phosphors. One is to directly dope rare earth small molecule complexes into the polymer matrix to obtain doped white light polymer fluorescent materials. This method has a simple process, but there are phase separation and fluorescence quenching. The other is to synthesize reactive rare earth complex monomers first, and then polymerize with other organic monomers to obtain bonded polymer copolymers, or rare earth ions and ligand groups on the polymer chain. Groups such as...

AI Technical Summary

Problems solved by technology

There are two main ways to synthesize white light phosphors. One is to directly dope rare earth small molecule complexes into polymer matrix to obtain doped white light polymer fluorescent materials. This method is simple in process, but there are phase separation and fluorescence quenching. The other is to synthesize a reactive rare earth complex monomer first, and then polymerize it with other organic monomers to obtain a bonded polymer copolymer, or rare earth ions and ligand groups on the polymer chain Groups such as carboxyl and sulfonic acid groups react to obtain rare earth polymer complexes; practice has proved that the fluorescence intensity of monochromatic polymers is greater than that of trichromatic doped polymers

Images