| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Luminescence and Site Occupancy of Eu2+ in Ba2 Ca(BO3)2 |
| LI Pan-Lai**, WANG Zhi-Jun, YANG Zhi-Ping, GUO Qing-Lin
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College of Physics Science and Technology, Hebei University, Baoding 071002
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LI Pan-Lai, WANG Zhi-Jun, YANG Zhi-Ping et al 2011 Chin. Phys. Lett. 28 017801 |
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Abstract A green phosphor Ba2Ca(BO3)2:Eu2+ was synthesized by a high temperature solid–state reaction method under a reductive atmosphere. The luminescence and site occupancy of Eu2+ in Ba2Ca(BO3)2 are investigated. Ba2Ca(BO3)2:Eu2+ shows one green band (537 nm) under 400 nm near ultraviolet excitation which is suitable for UV LED. Ca2+ and Ba2+ ions in Ba2Ca(BO3)2 are replaced by Eu2+ ions, the Ba2Ca(BO3)2:Eu2+ shows a dissymmetrical emission band. The influence of Eu2+ doping concentrations on the emission intensity of Ba2Ca(BO3)2:Eu2+ is studied. It is found that the emission intensity is influenced by the Eu2+ concentration and reaches the maximum value at 2% Eu2+. According to the Dexter theory, the concentration quenching mechanisms of Eu2+ in Ba2Ca(BO3)2 are the d–dinteraction.
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| Keywords:
78.55.-m
33.50.Dq
33.20.Kf
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Received: 13 August 2010
Published: 23 December 2010
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| PACS: |
78.55.-m
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(Photoluminescence, properties and materials)
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33.50.Dq
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(Fluorescence and phosphorescence spectra)
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33.20.Kf
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(Visible spectra)
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