红色Y_2O_2S:Eu^(3+)磷光材料的沉淀法制备和发光性能研究  

Preparation and Characterization of Y_2O_2S:Eu^(3+) Phosphors by Co-precipitation Method

作　　者：杨志平[1] 刘冲[1] 郭智[1] 冯建伟[1] 杨勇[1] 李兴民[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2004年第6期585-588,593,共5页Journal of Hebei University(Natural Science Edition)

基　　金：河北科学技术发展项目(51215103b)

摘　　要：用沉淀法制备了Eu3+掺杂的Y2O2S磷光材料,测量并研究了掺杂不同物质的量的Eu3+离子的Y2O2S磷光材料的发射谱和激发谱.发射光谱对应了Eu3+离子5DJ(J=0,1,2,3)-7FJ(J=0,1,2,3,4)的特征发射,激发光谱主峰对应260,345,468,540nm等,余辉时间(到人眼的最小亮度分辨率0.32mcd/m2)可达1h以上.Synthesis of the Eu^(3+)-activated Y_2O_2S by Co-precipitation method was presented. The crystalline phases by direct sintering method and Co-precipitation method were investigated. The excitation spectra and emission spectra of Y_2O_2S phosphors doped with different Eu^(3+) molar ratio were measured. The main emission peaks ascribed to Eu^(3+) ions transition from　()~5D_J(J=0,1.2)to ()~7F_J(J=0,1,2,3,4) were found. The main excitation peaks includes 260 nm, 345 nm, 468 nm, 540 nm etc. The afterglow time was over 1 hour in the light perception of the dark-adapted human eye (0.32 mcd/m^2).

关 键 词：长余辉 Y2O2S EU^3+ 沉淀法 

分 类 号：O482.31[理学—固体物理]