YAG粉末材料中Cr^(3+)敏化的Yb^(3+)近红外发光性质  

Near-infrared emission properties of Yb^(3+) ions sensitized by Cr^(3+) ions in YAG powder materials

作　　者：段佩华[1] 张继森[1] 张立国[1] 任建岳[1] 骆永石[1] 吕少哲[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《中国光学》2015年第4期603-607,共5页Chinese Optics

基　　金：国家自然科学基金资助项目(No.11174276;No.11174278)

摘　　要：采用高温固相反应法合成了YAG∶0.02Cr3+,y Yb3+系列粉末材料,研究了该系列材料在近红外区域的发光特性,主要包括Cr3+,Yb3+的发光性质、Cr3+∶4T2和Yb3+∶2F5/2能级辐射跃迁寿命以及其布居时间的比较,给出了Yb3+最佳掺杂量为10%。实验表明:通过Cr3+→Yb3+能量传递,实现了Yb3+在1 000 nm附近近红外发光的增强,这对进一步提高c-Si太阳能电池转换效率打下了坚实基础。YAG∶0. 02Cr^3＋,y Yb^3＋powder samples are prepared by high temperature solid-phase reaction method in this paper. Near-infrared emission properties of these powder materials are investigated including emission properties of Cr^3＋and Yb^3＋,luminescence lifetimes of Cr^3＋∶4T2and Yb^3＋∶2F5 /2and comparison of their population time. Optimal doping concentration of Yb^3＋（ 10%） is given. Experiments indicate that the broadband spectral conversion makes the Yb^3＋∶2F5 /2→2F7 /2radiation transition obtain a favorable increase around 1 000 nm by the efficient energy transfer from Cr^3＋to Yb^3＋,which laids a solid foundation to enhance solar photovoltaic conversion efficiency.

关 键 词：CR^3+ YB^3+ 近红外发光 能量传递 

分 类 号：O482.31[理学—固体物理]