Luminescence and Site Occupancy of Eu2＋ in Ba2 Ca（BO3）2

• Published in: Chinese physics letters Vol. 28; no. 1; pp. 190 - 192
• Main Author: LI Pan-Lai WANG Zhi-Jun YANG Zhi-Ping GUO Qing-Lin
• Format: Journal Article
• Language: English
• Published: 2011
• Subjects: 发光强度; 掺杂浓度; 离子取代; 绿色荧光粉; 钙离子; 高温固相反应法
• ISSN: 0256-307X; 1741-3540

A green phosphor Ba2Ca（BOa）2：Eu2＋ was syntheMzed by a high temperature solid-state reaction method under a reductive amosphere,, The luminescence and site occupancy of Eu2＋ in Ba2Ca（BOa）2 are investigated. Ba2Ca（BO3）2：Eu2＋ shows one green band （537nzn） under 400nln 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（BOa）2：Eu2＋ is studied. It is found that the emission intensity is influenced by the Eu2＋ concentration and reaches the maxinmm value at 2% Eu2＋, According to the Dexter theory, the concentration quenching mechanisms of Eu2＋ in Ba2 Ca（B03）2 are the d - d interaction,