Y_2SiO_5∶Ce^(3+)荧光体的基质多面体替换及其对发光性能的调控研究  

Host Polyhedral Substitution and the Modification of the Luminescence Properties of Y2SiO5∶Ce3+ Phosphor

作　　者：罗懿[1] 夏志国[1] 

机构地区：[1]中国地质大学(北京)材料学院,北京100083

出　　处：《无机化学学报》2013年第4期665-670,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51002146;No.51272242)资助项目

摘　　要：荧光材料基质的结构调制对于调控发光材料的发光性能,探索固体结构-性能关系具有重要的研究意义。本文以Y2SiO5基质为模型,分别利用Si/Al和Si/P取代,以[AlO4]和[PO4]四面体替换[SiO4]四面体,设计合成了一系列组成为Y1.95Si1-xAlxO5-xFx∶0.05Ce3+(x=0.05,x=0.1,x=0.2,x=0.4,x=1)和Y1.95-yCaySi1-yPyO5∶0.05Ce3+(y=0,y=0.02,y=0.04,y=0.06,y=0.08,y=0.2)的荧光材料。结合X射线衍射、荧光光谱、荧光寿命等测试手段对其进行了表征分析。结果表明,在x≤0.2,y≤0.04时得到的产物能够保持Y2SiO5的结构特征,在一定的基质组成替换范围内,设计合成的样品Y1.95Si1-xAlxO5-xFx∶0.05Ce3+、Y1.95-yCaySi1-yPyO5∶0.05Ce3+能提高发光强度,发射光谱呈现蓝移现象。荧光寿命测试表明这两个系列的化合物中Ce3+所处的基质环境变化较小,Ce3+发光也未产生较大的变化。Structural modification of the phosphor host plays a key role in the optimization of the luminescence properties of the optical materials, and it becomes the important research field for the exploration of the relationship between the solid structure and its property. The Y2SiO5 host is selected as the model to be substituted by the Si/Al or Si/P, and the [AlO4] and [PO4] tetragons are used to replace the [SiO4], so that a series of compounds with the chemical formula of Y1.95SiO5：0.05Ce^3＋, Y1.95Si1-xAlxO5-xFx：0.05Ce^3＋ （x=0.05, x=0.1, x=0.2, x= 0.4, and x=l）, Y1.95-yCaySi1-yPyO5：0.05Ce^3＋ （y=0, y=0.02, y=0.04, y=0.06, y=0.08, and y=0.2） phosphors were designed and successfully obtained. XRD patterns showed that the diffraction peaks of both Y1.95Si1-xAlxO5-xFx：0.05Ce^3＋ and Y1.95-yCaySi1-yPyO5：0.05Ce^3＋ matched well with the standard patterns of Y2SiO5. Photoluminescence investigations indicated that the emission intensities had been increased to a great extent compared with that of Y2SiO5. A slight blue-shift was also observed in the emission spectra of Y1.95Si1-xAlxO5-xFx：O.O5Ce^3＋ and Y1.95-yCaySi1-yPyO5：O.O5Ce^3＋. Moreover, decay curves of Y1.95Si1-xAlxO5-xFx：O.O5Ce^3＋ and Y1.95_yCaySi1-yPyO5：0.05Ce^3＋ confirmed that there are similar chemical environment for the Ce^3＋ luminescence.

关 键 词：Y2SIO5 多面体替换 发光性能 

分 类 号：O482.31[理学—固体物理]