Journal
OPTICAL MATERIALS
Volume 43, Issue -, Pages 59-65Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2015.02.024
Keywords
Photoluminescence; Cathodoluminescence; Electron-vibrational interaction; Mn2+; Field emission displays
Categories
Funding
- National Natural Science Foundation of China [21171176, U1232108, U1432249, J1103305]
- Guangzhou Science and Technology Project [2013Y2-00118]
- Science and Technology Project of Guangdong Province [2013B010403010]
- Natural Science Foundation of Guangdong Province [S2013030012842]
- European Social Fund's Doctoral Studies and Internationalization Program DoRa
- European Regional Development Fund (Center of Excellence 'Mesosystems: Theory and Applications') [TK114]
- Marie Curie Initial Training Network LUMINET [316906]
- Programme for the Foreign Experts by Chongqing University of Posts and Telecommunications
- Ministry of Education and Research of Estonia [PUT430]
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A series of Mn2+ doped Ba2MgSi2O7 phosphors with a nominal formula Ba2Mg1-xMnxSi2O7 (x = 0.01-0.13) were prepared by a high-temperature solid-state reaction technique. Their VUV vis photoluminescence spectra, fluorescence decay curves, and low-voltage cathodoluminescence spectra were measured and discussed in detail. The results confirm that the Mn2+ ions enter into the four-coordinated Mg2+ site in Ba2MgSi2O7 host lattice. The main electron-vibrational interaction (EVI) parameters (such as Huang Rhys factor, effective phonon energy and position of the zero-phonon line) were evaluated from the experimental spectra. Furthermore, the concentration and the temperature dependence of the emission intensity and the luminescence decays of Ba2MgSi2O7:Mn2+ were investigated, accordingly the schematic energy levels for Mn2+ in Ba2MgSi2O7 were proposed. Due to the high emission intensity under low-voltage electron beam excitation, a further optimized sample Ba2Mg0.95Mn0.05Si2O7 can be considered as a promising green phosphor for field emission displays (FEDs). (C) 2015 Elsevier B.V. All rights reserved.
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