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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Flux's influence on the luminescent properties of europium and dysprosium codoped melilite long afterglow phosphor
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Flux's influence on the luminescent properties of europium and dysprosium codoped melilite long afterglow phosphor

机译：助焊剂对euro和co共掺杂的莫来石长余辉荧光粉的发光性能的影响

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摘要

The europium (Eu ~(2 +)) and dysprosium (Dy ~(3 +)) codoped melilite (Sr _2MgSi _2O _7) long afterglow phosphors are synthesized with H _3BO _3 and Li _2CO _3 fluxes, respectively. The XRD analysis demonstrates similar crystal structure and crystal size of the samples. The SEM presents a better crystallization of samples with flux, other than the one without flux. The excitation and emission spectra of the samples are similar but the decay processes of the afterglow are different. The afterglow properties are enhanced by H _3BO _3 while they are suppressed by Li _2CO _3, due to the different concentrations and depths of traps. The sample without flux has a low trap concentration because of the greater surface. Li ~+ ions reduce the concentration of Sr ~(2 +) vacancies and then the trap depth becomes smaller. B ~(3 +) ions break the potential balance in oxygen vacancies then the attraction to trapped electron is enhanced.
机译：分别用H _3BO _3和Li _2CO _3助熔剂合成了co（Eu〜（2 +））和（Dy〜（3 +））共掺杂的镁铝石（Sr _2MgSi _2O _7）长余辉磷光体。 XRD分析表明样品的晶体结构和晶体尺寸相似。 SEM显示，具有助焊剂的样品比没有助焊剂的样品结晶更好。样品的激发光谱和发射光谱相似，但余辉的衰减过程不同。由于陷阱的浓度和深度不同，余辉性质由H _3BO _3增强，而被Li _2CO _3抑制。没有助焊剂的样品由于表面较大而捕集浓度低。 Li〜+离子降低了Sr〜（2 +）空位的浓度，因此陷阱深度变小。 B〜（3 +）离子打破了氧空位的电势平衡，从而增强了对捕获电子的吸引力。

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