Preparation method for green light-excited long afterglow phosphor with warm color

一种绿光激发的暖色长余辉发光材料制备方法

Abstract

The invention relates to a preparation method for green light-excited long afterglow phosphor with warm color. All the conventional red phosphors are low in luminous intensity or short in afterglow time, or cause environment pollution, so that the practical requirements cannot be met. Through the adoption of the invention, red phosphor Ba2Zn1-xS3 : xMn2+ excited by green light is coated on the surface of green long afterglow phosphor SrAl2O4 : Eu2+, Dy3+; and the thickness of the red phosphor can be controlled, so as to realize the purpose of efficient warm color long afterglow radiating with green-olivine-yellow-orange-red lights. The preparation method solves the problem that the afterglow time of the conventional directly prepared red phosphors is short, thereby being a new way for preparing warm color long afterglow materials.
本发明涉及一种绿光激发的暖色长余辉发光材料制备方法。目前各类红色发光材料不是发光强度不高、就是余辉时间太短,或者对环境有污染,均不能达到实用要求。本发明将可用绿光激发的Ba2Zn1-xS3:xMn2+红色发光材料包裹在SrAl2O4:Eu2+,Dy3+绿色长余辉发光粉表面,控制包裹层的厚度,实现“绿-黄绿-黄-橙-红”高效暖色长余辉发光的目的。该方法避免了目前直接制备的红色发光材料余辉时间短的问题,是暖色长余辉材料制备的新途径。

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