Spectral tuning and energy transfer in a potential fluorescent lamp phosphor BaMg₂Al₆Si₉O₃₀:Eu²⁺

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• 作者：Wei Lü ; ^a ; ^b ; Yongshi Luo^a ; ; Zhendong Hao^a ; Xia Zhang^a ; Xiaojun Wang^c ; Jiahua Zhang^a ; ^{zhangjh@ciomp.ac.cn}
• 关键词：Phosphor ; Energy transfer ; Fluorescent lamp
• 刊名：Journal of Luminescence
• 出版年：2012
• 期刊代码：54_00222313
• 类别：ch
• 出版时间：September, 2012
• 卷：132
• 期：9
• 页码：2439-2442
• 文件大小：740 K

摘要

BaMg₂Al₆Si₉O₃₀:Eu²⁺ phosphors are synthesized by the solid-state reaction method and their photoluminescence (PL) properties are investigated. The ultraviolet emission originates from Eu²⁺(I) substituting for Ba²⁺ sites, whereas the blue emission is attributed to Eu²⁺(II) substituting for Mg²⁺ sites. With increasing Eu²⁺ doping concentrations, the blue emission band shifts to long wavelength and the PL intensity ratio of blue to ultraviolet emission increases. Energy transfer between the two different Eu²⁺ ions is analyzed by photoluminescence excitation and emission spectra, and lifetimes. Results indicate that the emission spectra can be tuned by changing Eu²⁺ contents. We have also demonstrated that BaMg₂Al₆Si₉O₃₀:Eu²⁺ phosphor is a kind of potential phosphor for fluorescent lamps.