DIRECT UPCONVERSION SENSITIZATION LUMINESCENCE OF Ho(0.1)Yb(5):OXYFLUORIDE VITROCERAMICS |
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| Authors: | Chen Xiao-bo Zheng Zhe and Song Zeng-fu |
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| Affiliation: | Optical Center, Beijing Normal University, Beijing 100875, China; Beijing Normal University, Key Laboratory of Beam Technology and Materials Modification of Ministry of Education, Beijing 100875, China; Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Science, Beijing 100080, China; Department of Physics, Peking University, Beijing 100875, China |
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| Abstract: | This paper studies the upconversion luminescence phenomenon of the Ho,Yb co-doped oxyfluoride vitroceramics. There is one group of strong upconversion luminescence lines positioned at 536.5nm, 18639cm-1; 540.5nm, 18501cm-1; 544.0nm, 18399cm-1, which is easily identified as the transitions of 5S2→5I8. There are other splendid upconversion luminescence lines, which are 5S2→5I7,5F5→5I8,5G6→5I8, (5G3G)5 →5I8,(3F3H5G)4→5I7,5G4→5I8 and (5G3H)5→5I8. It is also found that an interesting kind of upconversion cooperative radiation fluorescence comes from a kind of coupling state of clusters consisting of two Yb3+ ions. |
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| Keywords: | upconversion luminescence oxyfluoride vitroceramics Ho3+ ion |
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