YVO_4∶Er^(3+)的合成及真空紫外发光性质的研究  

A Study of Synthesis and VUV Spectral Characteristics of YVO_4: Er^(3+) Phosphor

作　　者：沈雷军[1] 赵增祺[1] 李波[1] 周永勃[1] 张国斌[2] 高乐乐[1] 王忠志[1] 

机构地区：[1]稀土冶金及功能材料国家工程研究中心,内蒙古包头014010 [2]中国科学技术大学国家同步辐射实验室,安徽合肥230029

出　　处：《稀土》2011年第1期37-41,共5页Chinese Rare Earths

基　　金：国家发改委稀土办稀土应用研究项目(2007第14号)

摘　　要：经高温固相反应合成YVO4∶xEr3+(x=0.001,0.003,0.005,0.007,0.01,0.03,0.05,0.07,0.09,0.1摩尔比)绿色系列粉末状发光材料。经X射线衍射分析产物为单相,属四方锆英石结构。检测了材料的真空紫外激发光谱和发射光谱。发现,YVO4∶xEr3+(x=0.001,0.003,……,0.1摩尔比)的真空紫外激发光谱,在120nm～350nm范围内形成若干个连续的带状峰,应该归属于VO34-离子团的吸收带。在紫外和真空紫外激发下,样品的发射光谱均产生两个明显的锐锋,峰值在523nm和552nm附近,分别对应于Er3+离子的2H11/2→4I15/2,4S3/2→4I15/2跃迁;其中4S3/2→4I15/2的跃迁明显强于2H11/2→4I15/2。随着Er3+含量X由0.001增加到0.003,YVO4∶xEr3+发射光谱强度逐渐增加到最大值,之后随着x继续增加发射光谱强度逐渐下降,呈现明显的浓度猝灭现象。The samples of YVO4∶x Er3＋（x=0.001,0.003,0.005,0.007,0.01,0.03,0.05,0.07,0.09,0.1） were synthesized by the conventional solid state reaction.XRD measurements confirmed that the prepared YVO4∶xEr3＋ belonged to the Quartet zircon structure.The luminescent properties were studied by the excitation and emission spectra.It has been found that,the excitation spectra of YVO4∶Er3＋ are composed of series broad bands from 120 nm and 350 nm,the peak at 155nm was assigned to the VO3-4 absorption.The emission spectra of samples are composed of two narrow peaks,at 523nm and 552 nm corresponding to 2H11/2→4I15/2 and 4S3/2→4I15/2 transition of Er3＋ respectively.Both excited by UV or VUV,the samples emission intensity according to 4S3/2→4I15/2 transition was stronger than the 2H11/2→4I15/2.The emission peak value and intensity changed with the different excited length,it related to the excitation mechanism and energy transmission channels under different conditions.With the concentration of Er3＋ increased from 0.001 to 0.003,the emission intensity gradually increased to the maximum.As the concentration continue to increase,the emission intensity began to decline,showing aclear concentration quenching phenomenon.

关 键 词：YVO4∶xEr3+ 真空紫外 发光 

分 类 号：O482.31[理学—固体物理]