Research on the afterglow properties of red-emitting phosphor: SrAl2O4:Eu2+, Dy3+/light conversion agent for red luminous fiber

Abstract

SrAl2O4:Eu2+, Dy3+/light conversion agent is a new composite luminescent material, which can emit red light in the darkness after being excited. The SrAl2O4:Eu2+, Dy3+ was prepared by means of solid-state reaction, and SrAl2O4:Eu2+, Dy3+/light conversion agent was fabricated by combining light conversion agent on to SrAl2O4:Eu2+, Dy3+ particles. In order to promote the afterglow properties of this red-emitting phosphors, several kinds of SrAl2O4:Eu2+, Dy3+/light conversion agent containing different light conversion agent were artificially manufactured, and the effect of manufacturing elements including the concentration of light conversion agent and environmental factor of heating temperature, drying temperature, stirring time on its luminescence property were investigated through evaluating their afterglow properties. The results showed that the light conversion agent and manufacturing process did not destroy the phase of SrAl2O4:Eu2+, Dy3+, and the red light were not emitted by SrAl2O4:Eu2+, Dy3+ just for the energy transferred from SrAl2O4:Eu2+, Dy3+ to light conversion agent. And the affecting factors of light conversion agent concentration, heating temperature, drying temperature, stirring time had different influence on the afterglow property of SrAl2O4:Eu2+, Dy3+/light conversion agent with increasing the concentration of light conversion agent, heating temperature, drying temperature, stirring time, the afterglow time and initial brightness of this phosphor increased and then decreased gradually.