新型红色荧光粉SrO·Y_2O_3:Eu的合成及其发光性能研究  

Synthesis and Luminescent Properties of Novel Red Phosphor SrO·Y_2O_3:Eu

作　　者：翟永清[1] 杨国忠[1] 刘宇[1] 刘红梅[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《光谱学与光谱分析》2008年第3期522-526,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20675023);河北省教育厅博士基金项目(B2004205);河北大学研究基金项目(y2004024)资助

摘　　要：以甘氨酸快速燃烧法合成了一种新型红色荧光粉SrO·Y2O3:Eu,并用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)及荧光分光光度计(FL)对样品的物相结构、微观形貌及粒度、光谱性质等进行了分析表征。结果表明:制得的样品含有SrY2O4和Y2O3两相,分别属于正交晶系和立方晶系。所合成样品颗粒为球形,一次颗粒粒径为100～200nm。样品的激发主峰在280nm处,为O2-的2p轨道到Eu3+的4f轨道的电荷迁移跃迁所致,主发射峰位于592nm,属于Eu3+的5D0→7F1跃迁,614nm处还有一较强的发射峰,归属于Eu3+的5D0→7F2跃迁。此外,研究发现甘氨酸与硝酸根配比、焙烧温度、Eu3+浓度等条件均对SrO·Y2O3:Eu的亮度有一定的影响。A novel red-emitting phosphor SrO·Y2O3：Eu was synthesized by glycine combustion process.The phases and structure,the size and morphology,and the luminescent properties of the samples were investigated respectively by XRD,SEM and fluorescence spectrophotometer（FL）.The results show that the samples include two phases,SrY2O4 and Y2O3,which belong to orthorhombic system and cubic system respectively.The particles of SrO·Y2O3：Eu obtained at 1 200 ℃ are nearly spherical in shape,and the mean grain size is in the range of 100-200 nm.The excitation spectrum of SrO·Y2O3：Eu phosphor shows a broad band with a main peak around 280 nm,which is due to the charge-transfer（CT） in the excitation of an electrons from the oxygen 2p state to an Eu^3＋ 4f state.Excited with a radiation of 280 nm,the phosphor emits strong red fluorescence,and the main emission peak is around 592 nm,which can be assigned to the transition of ^5D0→^7F1 of Eu^3＋ ion.Another strong emission peak is at 614 nm,which can be assigned to the transition of 5D0→7F2 of Eu^3＋ ion.Moreover,it was found that the ratio of glycine to nitrate ion,calcinations temperature and the concentration of Eu^3＋ have significant effect on the luminescent intensity of SrO·Y2O3：Eu.

关 键 词：燃烧法 红色荧光粉 SrO·Y2O3:Eu 

分 类 号：O614.3[理学—无机化学]