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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effective assembly of a novel aluminum-oxynitride BaAl11O16N activated by Eu2+ and Mn2+ via salt-flux assistance and its photophysical investigation
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Effective assembly of a novel aluminum-oxynitride BaAl11O16N activated by Eu2+ and Mn2+ via salt-flux assistance and its photophysical investigation

机译：通过Eu2 +和Mn2 +通过盐通量辅助及其光药调查的新型氧氧氧氮化铝BaAl116N的有效组装

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摘要

In this paper, BaAl11O16N (BAON) based oxynitride phosphors have been synthesized via the employment of the flux method and Eu2+/Mn2+ co-doped technique. The effects of different fluxes on phase formation of the phosphor have been investigated. It has been found that BaF2 is the best flux to prepare BAON as it can decrease the pure phase-forming temperature (similar to 1550 degrees C) than the normal solid state synthesis (similar to 1700 degrees C). It also gives the best luminescence quantum efficiency. The crystallinity, morphology and grain size of the phosphor can be improved when more BaF2 flux has been added. The photoluminescence (PL) spectra and decay curves for Eu2+ /Mn(2+)co-doped BAON phosphors reveal that an efficient energy transfer (ET) from Eu2+ to Mn2+ takes place in the BAON host. The corresponding ET efficiencies and mechanisms are evaluated and the critical distance (R-c) is calculated in terms of the experimental data and analysis. The emission colors of the co-doped phosphors can be tuned from blue to green by simply varying the doping concentrations of Mn2+. White light-emitting diodes (WLEDs) are fabricated by coating the as-prepared samples on a near ultraviolet (n-UV) LED chip to explore the real application potentials. The excellent performance of this WLEDs verifies that the co-doped phosphor can be used as an efficient green component. (C) 2019 Elsevier B.V. All rights reserved.
机译：在本文中，通过使用助熔剂方法和EU2 + / MN2 +共掺杂技术合成了BaAl11O16n（BaOn）氧氮化物磷光体。研究了对磷光体相形成的不同通量的影响。已经发现，BAF2是制备粘合剂的最佳助焊剂，因为它可以降低纯相 - 形成温度（类似于1550℃）而不是正常固态合成（类似于1700℃）。它还给出了最佳发光量子效率。当添加更多BAF2通量时，磷光体的结晶度，形态和晶粒尺寸可以提高。为EU2的光致发光（PL）光谱和衰减曲线+ / Mn为（2+）共掺杂的磷光体BAON表明，从Eu2 +的有效的能量转移（ET）到MN2 +发生在BAON主机。评估相应的ET效率和机制，并且根据实验数据和分析计算临界距离（R-C）。通过简单地改变Mn2 +的掺杂浓度，共掺杂磷光体的发光颜色可以从蓝色调谐到绿色。通过在近紫外线（N-UV）LED芯片上涂覆在近紫外（N-UV）LED芯片上的制备样品来制造白色发光二极管（WLOD）以探索真正的应用势。该WLED的优异性能验证了共掺杂的磷光体可用作有效的绿色成分。 （c）2019 Elsevier B.v.保留所有权利。

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