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Photon cascade luminescence in CaAl12O19:Pr, Cr |
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| Authors: | ZG Nie JH Zhang X Zhang SZ Lü XG Ren GB Zhang |
| Institution: | a Key Laboratory of Excited State Physics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 16 Eastern Nan-Hu Road, Changchun 130033, China b Graduate School of Chinese Academy of Sciences, Beijing 100039, China c National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China d Department of Physics, Georgia Southern University, Statesboro, GA 30460, USA |
| Abstract: | In this report, the Cr3+ ion was chosen as a co-dopant to modify the unpractical photon cascade emission properties of Pr3+-doped CaAl12O19 phosphors, which emit one near-UV photon from the 1S0 state followed by visible photons from the 3P0 state, into phosphors that emits two visible photons through energy transfer. The photon cascade emission process via energy transfer and the transfer mechanisms were systemically investigated by luminescence spectra and dynamics using synchrotron radiation as one of the excitation sources. The internal visible quantum efficiency of CaAl12O19:Pr, Cr was estimated and compared with CaAl12O19:Pr and the drawback to obtain the visible quantum efficiency higher than unit for CaAl12O19:Pr, Cr as a practical VUV phosphor was also discussed. |
| Keywords: | Photon cascade luminescence Synchrotron radiation Energy transfer |
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