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首页> 外文期刊>CERAMICS INTERNATIONAL >Alkali metal ion substitution induced luminescence enhancement of NaLaMgWO6:Eu3+ red phosphor for white light-emitting diodes
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Alkali metal ion substitution induced luminescence enhancement of NaLaMgWO6:Eu3+ red phosphor for white light-emitting diodes

机译：碱金属离子取代诱导的Nalamgwo6的发光增强：Eu3 +红色磷光体用于白色发光二极管

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摘要

Alkali metal ion substitution is an effective strategy to improve the luminescence properties of phosphors. In this work, a series of red-emitting phosphors Na(1-x)Li(x/2)K(x/2)La(0.6)En(0.4)MgWO(6) were prepared by a traditional high temperature solid-state reaction. Their phase structure, microstructure, luminescence properties and potential application in phosphor-converted white light-emitting diodes (pc-WLEDs) were investigated in detail. X-ray diffraction (XRD) result revealed the formation of a solid solution when x = 0.3, which kept monoclinic structure of NaLaMgWO6. Photoluminescence investigation indicated that the partial substitution of Li+/K+ ions for Na+ ions improved largely the red emission of Eu3+. Based on the optimized Na0.7Li0.15K0.15La0.6Eu0.4MgWO6 sample with relatively good thermal stability, a WLED device was fabricated by combining a near-ultraviolet (NUV) chip (similar to 400 nm) with the phosphor mixture of commercial green/blue phosphors and the optimized red phosphor. The results indicated that the optimized red phosphor in this work could be a potential candidate for WLEDs pumped by NUV chips.
机译：碱金属离子取代是改善磷光体发光性能的有效策略。在这项工作中，通过传统的高温固体制备了一系列红色发光磷光体Na（1-x）Li（X / 2）L1（X / 2）LA（0.6）MgWO（0.4）MgWO（6）国家反应。研究了它们的相结构，微观结构，发光性能和磷光体转换的白光二极管（PC-WLED）的潜在应用。 X射线衍射（XRD）结果显示当X＆ = 0.3时形成固溶体的形成，该X = 0.3保持纳巴拉姆瓦6的单斜视结构。光致发光调查表明，对于Na +离子的Li + / K +离子的部分取代在很大程度上改善了Eu3 +的红色发射。基于具有相对良好的热稳定性的优化NA0.7LI0.15K0.15LA0.6EU0.4MGWO6样品，通过将近紫外（NUV）芯片（类似于400nm）与商业绿色的磷光体混合物组合来制造WLED器件/蓝磷光体和优化的红磷光体。结果表明，该工作中的优化红磷光体可能是由Nuv芯片泵浦的WLED的潜在候选者。

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