文献类型：期刊文献

中文题名：Near-infrared Quantum Cutting in Pr^(3+)-Yb^(3+) Co-doped Oxyfluoride Glass Ceramics Containing CaF_2 Nanocrystals

英文题名：Near-infrared quantum cutting in Pr3+-Yb3+ Co-doped oxyfluoride glass ceramics containing CaF2 nanocrystals

作者：Zhang, Lili[1]; Xu, Jie[1]; Hu, Yichen[1]; Chen, Guorong[1]; Wang, Zhongjian[1]

机构：[1] School of Materials Scence and Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2013

卷号：28

期号：3

起止页码：455

中文期刊名：Journal of Wuhan University of Technology(Materials Science)

外文期刊名：Journal Wuhan University of Technology, Materials Science Edition

收录：CSTPCD;;EI(收录号：20132416423729);Scopus

基金：Funded by Key Laboratory for Ultrafine Materials of Ministry of Education(No.08DZ2230500),School of Materials Science and Engineering,East China University of Science and Technology

语种：英文

中文关键词：oxyfluoride glass ceramic; nanocrystal; fluorescence; near-infrared quantum cutting

外文关键词：X ray diffraction - Calcium fluoride - Energy dispersive spectroscopy - Fluorspar - Infrared devices - Nanocrystals - Glass ceramics - Quantum efficiency - Ytterbium compounds

摘要：The Pr3＋-Yb3＋ co-doped oxyfluoride glass-ceramics containing CaF2 nanocrystals were obtained by thermal treatment on the as-made glasses. The structure of fluoride nanocrystals was investigated. The light-emitting mechanism of pr3＋-yb3＋ in the near infrared region was proposed and the fluorescence lifetime and quantum efficiency was calculated. The results indicate that the main phase in the oxyfluoride glass- ceramics is CaF2 nanocrystal sized at 30 nm. Energy dispersive spectroscopy （EDS） and X-ray diffraction （XRD） have proved the incorporation of Pr3＋ and Yb3＋ into CaF2 nanocrystal lattice, Near-infrared quantum cutting involving Yb3＋ 980 nm and 1 015 tun （2F5/2→2F7/2） emission has been achieved upon the excitation of the 3P0 energy level of Pr3＋ at 482 nm. The fluorescence lifetime decreases sharply and quantum efficiency increases with increasing Yb3＋ concentration, and the optimal quantum efficiency reaches 191%.
The Pr3+-Yb3+ co-doped oxyfluoride glass-ceramics containing CaF2 nanocrystals were obtained by thermal treatment on the as-made glasses. The structure of fluoride nanocrystals was investigated. The light-emitting mechanism of Pr3+-Yb3+ in the near infrared region was proposed and the fluorescence lifetime and quantum efficiency was calculated. The results indicate that the main phase in the oxyfluoride glassceramics is CaF2 nanocrystal sized at 30 nm. Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) have proved the incorporation of Pr3+ and Yb3+ into CaF2 nanocrystal lattice. Near-infrared quantum cutting involving Yb3+ 980 nm and 1 015 nm (2F5/2→2 F 7/2) emission has been achieved upon the excitation of the 3 P 0 energy level of Pr3+ at 482 nm. The fluorescence lifetime decreases sharply and quantum efficiency increases with increasing Yb3+ concentration, and the optimal quantum efficiency reaches 191%. ? 2013 Wuhan University of Technology and Springer-Verlag Berlin Heidelberg.