PDP用发光材料的研究进展

目前,商用PDP三基色荧光粉主要为红色(Y,Gd)BO₃:Eu³⁺,绿色Zn₂SiO₄:Mn²⁺、BaAl₁₂O₁₉:Mn²⁺或(Gd, Y)BO₃:Tb³⁺,蓝色BaMgAl₁₀O₁₇:Eu²⁺。然而,以上3种荧光粉均存在发光效率低的问题;另外,(Y, Gd)BO₃:Eu³⁺的色纯度较差,Zn₂SiO₄:Mn²⁺和BaAl₁₂O₁₉:Mn²⁺的衰减时间较长,(Gd,Y)BO₃:Tb³⁺亮度不足,BaMgAl₁₀O₁₇:Eu²⁺的稳定性较差,这些因素在一定程度上制约了其发光和显示性能。本文总结了目前红、绿、蓝三种发光材料的真空紫外发光机理以及发光性能改进的研究进展,同时,对目前开发新型PDP用发光材料的研究也进行了介绍。

Process in PDP Luminescence Materials

At present,the commercial tri-color phosphors for PDP application are(Y,Gd)BO3∶ Eu3+(red phosphor),Zn2SiO4∶Mn2+,BaAl12O19∶Mn2+ or(Gd,Y)BO3∶Tb3+(green phosphors) and BaMgAl10O17∶Eu2+(blue phosphor).However,there exists a common problem in the above tri-color phosphors,that is,their luminescence efficiency is low.Moreover,they also present the disadvantages as follows which restrict their luminescence properties: the color purity of(Y,Gd)BO3∶Eu3+ is poor;the decay lifetimes of Zn2SiO4∶Mn2+ and BaAl12O19∶Mn2+ are long;the luminescence intensity of(Gd,Y)BO3∶Tb3+ is insufficiency,while BaMgAl10O17∶Eu2+ presents poor stability when treated by heating or VUV irradiation.Aiming at these problems,this paper summarizes the recent research progresses on the VUV luminescence mechanism and the improvement of luminescence properties for the tri-color phosphors.Meanwhile,the research progress on the exploring of novel VUV phosphors is also involved.