Preparation and Characterization of a Red-Emitting, Long-Lasting, Stable, and Multi-Structure Luminous Material: SiO₂/RhB@SAOED/SMSOED

Abstract

In our previous study, it was found that Rhodamine B@SrAl2O4:Eu2+, Dy3+/ Sr2MgSi2O7:Eu2+, Dy3+ can achieve a red shift in luminescence color. In order to improve the stability of the luminous material and reduce the loss of red luminescence emission in subsequent application, the Rhodamine B@SrAl2O4:Eu2+, Dy3+/ Sr2MgSi2O7:Eu2+, Dy3+ was coated with SiO2, and SiO2/ RhB@SrAl2O4:Eu2+, Dy3+/Sr2MgSi2O7:Eu2+, Dy3+ was successfully synthesized by sol-gel method. The microstructure, surface structure, luminescence properties, afterglow properties, the coating effect, and stability of the sample were studied by changing the SiO2 coating ratio and temperature during the coating process. The results showed that when the proportion of SiO2 coating is 30% and the temperature is 60℃, the effect of SiO2 coating was best. As the proportion of SiO2 more than 30%, the absorption and release of light by the sample were greatly affected, and the afterglow performance decreased.