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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 >Novel multi-wavelength effectively excited ZnWO4-WO3:Eu3+ multiphase red phosphor for white light-emitting diodes
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Novel multi-wavelength effectively excited ZnWO4-WO3:Eu3+ multiphase red phosphor for white light-emitting diodes

机译：新型多波长有效激发ZnWO4-WO3：Eu3 +多相红磷，用于白色发光二极管

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摘要

The discovery of phosphor with efficient red emission is a crucial step in the development of the white light-emitting diodes (wLEDs). Herein, based on the regulation of the W/Zn ratio, the Eu3+-activated ZnWO4-WO3 center dot 0.5H(2)O-WO3 multiphase phosphor was designed successfully via the one-step hydrothermal treatment route. The effects of the W/Zn ratio on the phase structure, composition, morphology, luminescence property and lifetime of the obtained samples were systematically and comparatively investigated. The obtained product not only maintains the multi-wavelength excitation feature of ZnWO4:Eu3+ phosphor, but also sharply improves the characteristic emission intensity of Eu3+ ions. It is found that the WO3 center dot 0.5H(2)O crystal has a special 3D interconnected channel structure, which is a relatively much access to the chemical behavior and permits the ready insertion of part of Eu3+ ions, and this coordination environment can obtain strong pure red light emission. Further, the ZnWO4-WO3:Eu3+ phosphor obtained after dehydration treatment can be excited more efficiently in the deep-ultraviolet (DUV), near-ultraviolet (NUV) and blue light regions, and its quantum efficiencies reach 18%, 22% and 21.2%, respectively. Besides, it also exhibits better CIE chromaticity coordinate, higher color purity than commercial Y2O2S:Eu3+ phosphor. Therefore, the ZnWO4-WO3:Eu3+ is promising for the application in red phosphor with different wavelengths for wLEDs. (C) 2019 Elsevier B.V. All rights reserved.
机译：具有有效红色发射的磷光体的发现是白光二极管（WLODS）开发的关键步骤。这里，基于W / Zn比的调节，通过一步水热处理路线成功地设计了Eu3 + -Activated ZnWO4-WO3中心点0.5H（2）O-WO3多相磷光体。系统和相对地研究了所得样品的相结构，组成，形态，发光性能和寿命的W / Zn比对所得样品的影响。所得产物不仅维持ZnWO4：Eu3 +磷光体的多波长激励特征，而且还急剧提高了Eu3 +离子的特征发射强度。发现WO3中心点0.5H（2）O晶体具有特殊的3D互连通道结构，这是对化学行为的相对较多的访问，并且允许Eu3 +离子的一部分的准备插入，并且该协调环境可以获得强烈的红色发光。此外，在脱水处理后获得的ZnWO4-WO3：Eu3 +磷光体可以在深紫外（DUV），近紫外（Nuv）和蓝光区域中更有效地促进，其量子效率达到18％，22％和21.2 ％， 分别。此外，它还表现出更好的CIE色度坐标，比商业Y2O2S：EU3 +荧光体更高的颜色纯度。因此，ZnWO4-WO3：EU3 +是希望在具有不同波长的红色磷光体中的应用。 （c）2019 Elsevier B.v.保留所有权利。

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