期刊
JOURNAL OF RARE EARTHS
卷 29, 期 6, 页码 536-539出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(10)60493-0
关键词
upconversion luminescence; Y2O3; holmium; sol-gel; rare earths
资金
- National Natural Science Foundation of China [10774140, 10904139, 11074245, 11011120083]
- Chinese Academy of Sciences [KJCX2-YW-M11]
- China Postdoctoral Science Foundation [20100480693]
- Special Foundation for Talents of Anhui Province, China [2007Z021]
Under the excitation of 980 nm diode laser, intense green emission (F-5(4)+S-5(2)-I-5(8)) of Ho3+ was observed in Ho3+ and Yb3+ co-doped cubic Y2O3. The doping concentration and laser power dependence of the upconverted emission were studied. The decay curves of F-5(4)+S-5(2) emission of Ho3+ under the excitation of 355 nm pulse laser were measured to investigate the energy transfer process between Ho3+ and Yb3+. The results indicated that two-photon process was responsible for the upconversion (UC) emission. The Ho3+ concentration of 0.04 mol.% and the Yb3+ concentration of 5 mol.% were determined to be the best value for the strongest Ho3+ emission under the excitation of 980 nm light. The cross-relaxation between two neighboring Ho3+ ions and the back energy transfer from Ho3+ to Yb3+ were important factors for determining the optimal doping concentration. This material was a promising candidate for the application in biomedical fluorescent labels for the intense green emission upon excitation of near-infrared (NIR) light.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据