Na_2SrSiO_4:Ce^(3+),Tb^(3+),Yb^(3+)的制备及近红外量子剪裁发光性质  

Preparation and Near-Infrared Quantum Cutting Luminescent Properties of Na_2SrSiO_4:Ce^(3+),Tb^(3+),Yb^(3+) Phosphor

作　　者：刘关喜[1] 孟建新[2] 

机构地区：[1]暨南大学化学系,广州市黄埔大道西601号510632 [2]暨南大学纳米化学研究所,广州市黄埔大道西601号510632

出　　处：《光谱实验室》2011年第5期2179-2182,共4页Chinese Journal of Spectroscopy Laboratory

基　　金：国家自然科学基金(No.30670523)资助项目;中央高校基本科研业务费专项资金资助项目

摘　　要：采用高温固相法制备了新型N a2SrS iO4:C e3+,Tb3+,Y b3+的近红外发光材料。对样品可见和近红外激发光谱、发射光谱及荧光寿命的研究表明,N a2SrS iO4:C e3+,Tb3+,Y b3+中存在高效的Tb3+→Y b3+的量子剪裁下转换效应,下转换量子效率约为182.4%。C e3+的共掺大大提高了样品的紫外光吸收,显著敏化了样品的近红外发光效率。研究了C e3+,Tb3+和Y b3+掺入量对其发光性质的影响。结果表明,当C e3+的浓度为2%,Tb3+的浓度为13%和Y b3+的浓度为16%时,样品的近红外发光最强。Novel Na2SrSiO4：Ce3＋,Tb3＋,Yb3＋ Phosphors were synthesized by high temperature solid state method.The visible and near-infrared excitation spectrum and emission spectrum as well as fluorescence decay curves were determined.Highly efficient down conversion efficiency of quantum-cutting in Tb3＋→Yb3＋ was confirmed in Na2SrSiO4：Ce3＋,Tb3＋,Yb3＋ Phosphors,and the down conversion efficiency was measured to be 182.4%.The results indicated that absorption of UV light remarkably increased after addition of Ce3＋,and the near infrared fluorescence intensity can be greatly sensitized.The effect of doping concentrations of RE3＋（RE=Ce,Yb,Tb） on luminescent properties was investigated.When doping concentration of 2% for Ce3＋,13% for Tb3＋ and 16% for Yb3＋,near infrared luminescence was strongest.

关 键 词：量子剪裁 近红外发光 Na2SrSiO4 YB3+ 

分 类 号：O482.31[理学—固体物理] O434.13[理学—物理]