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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >A high efficiency blue phosphor BaCa2MgSi2O8:Eu under VUV and UV excitation
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A high efficiency blue phosphor BaCa2MgSi2O8:Eu under VUV and UV excitation

机译:在VUV和UV激发下的高效蓝色荧光粉BaCa2MgSi2O8:Eu

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摘要

BaCa2MgSi2Os:Eu~(2+) phosphors have been prepared by a conventional high temperature solid state reaction technique. The emission and excitation spectra as well as the luminescence decays were investigated, showing that Eu~(2+) ions enter both Ba~(2+) and Ca~(2+) sites in the host. The structural refinement reveals that about 70% Eu~(2+) ions occupy Ba~(2+) sites in samples Ba_(1-x)Eu_xCa2MgSi2O8 and BaCa2(_(1-x))Eu_(2x)MgSi2O8, By investigation of the thermal-quenching, the schematic energy levels for Eu~(2+) in BaCa2MgSi2O8 were proposed. Intense blue emission was observed under 147, 172 and 254 nm excitation in comparison with the commercial blue phosphor BaMgAI_(12)O_(17):Eu~(2+) (BAM), demonstrating the potential application of the phosphors in plasma display panels (PDPs) and tri-color fluorescent tubes.
机译:BaCa2MgSi2Os:Eu〜(2+)荧光粉已通过常规的高温固态反应技术制备。研究了发射光谱和激发光谱以及发光衰减,结果表明Eu〜(2+)离子同时进入宿主的Ba〜(2+)和Ca〜(2+)位。结构细化表明,样品Ba_(1-x)Eu_xCa2MgSi2O8和BaCa2(_(1-(x))Eu_(2x)MgSi2O8中约70%的Eu〜(2+)离子占据了Ba〜(2+)位点。针对热淬火,提出了BaCa2MgSi2O8中Eu〜(2+)的能级示意图。与市售蓝色荧光粉BaMgAl_(12)O_(17):Eu〜(2+)(BAM)相比,在147、172和254 nm激发下观察到强烈的蓝色发射,证明了该荧光粉在等离子显示屏中的潜在应用(PDP)和三色荧光灯管。

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