摘要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.
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.
LI Pan-Lai**;WANG Zhi-Jun;YANG Zhi-Ping;GUO Qing-Lin
. Luminescence and Site Occupancy of Eu2+ in Ba2 Ca(BO3)2[J]. 中国物理快报, 2011, 28(1): 17801-017801.
LI Pan-Lai**, WANG Zhi-Jun, YANG Zhi-Ping, GUO Qing-Lin
. Luminescence and Site Occupancy of Eu2+ in Ba2 Ca(BO3)2. Chin. Phys. Lett., 2011, 28(1): 17801-017801.
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