利用硅烷偶联剂作为分子桥的作用将Sr₂ZnSi₂O₇∶Eu²⁺,Dy³⁺和有机光转换剂结合,Sr₂ZnSi₂O₇∶Eu²⁺,Dy³⁺在激发之后发出蓝光,光转换剂吸收蓝光并释放出红色荧光,因此获得无机-有机复合红色长余辉荧光粉。利用扫描电镜、分光光度计和余辉亮度仪对红色荧光粉的形貌和发光性能进行了分析与表征。结果表明:光转换剂通过化学键合的方式包覆在硅酸锌锶表面,复合荧光粉有470nm和600nm两个发射峰,呈现红色荧光而且具有较好的余辉性能;探究了光转换剂对复合荧光粉发光性能的影响,随着光转换剂比例的增加,复合发光材料的荧光颜色会发生一定的红移,但余辉性能和发光效率有所下降。

To obtain the long lasting red phosphors,light conversion agents were connected to the Sr₂ZnSi₂O₇∶Eu²⁺,Dy³⁺ by silane coupling agent.Sr₂ZnSi₂O₇∶Eu²⁺,Dy³⁺ will emit blue light after excited by excitation light source,and then the blue light converted into the red light by the light conversion agent.As a result,the long afterglow composite phosphors can emit red fluorescent were prepared.The microstructure,colorimetric parameters,excitation and emission spectra of samples were tested and characterized by using scanning electron microscopy,fluorescent spectrophotometer and fluorescent material persistence characteristic tester.The results showed that the light conversion agent combined into the surface of Sr₂ZnSi₂O₇ successfully,there were two emission peak 470nm and 600nm,and what's more,the composite phosphor can absorb ultraviolet and visible light.Besides,the influence of light conversion agents on Sr₂ZnSi₂O₇ was researched.The fluorescent colors of red composite phosphors had red shifted with increasing the concentration of light conversion agent,but the afterglow performance and quantum efficiency decreased to some extent.