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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 >Monodisperse and hollow structured Y2O3:Ln(3+) (Ln = Eu, Dy, Er, Tm) nanospheres: A facile synthesis and multicolor-tunable luminescence properties
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Monodisperse and hollow structured Y2O3:Ln(3+) (Ln = Eu, Dy, Er, Tm) nanospheres: A facile synthesis and multicolor-tunable luminescence properties

机译:单分散且空心结构的Y2O3:Ln(3+)(Ln = Eu,Dy,Er,Tm)纳米球:简便的合成方法和多色可调的发光特性

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摘要

A novel, fast and simple method was developed to synthesize the undoped and lanthanide-doped yttrium oxide hollow nanospheres (Y2O3 center dot HNSs) with multicolored downconversion emission under mild conditions by employing poly (acrylic acid sodium salt) microspheres (PAAS MSs) as active templates followed by a subsequent calcination process. The structure, morphology, formation process, and fluorescent properties are well investigated using various techniques. The results show that the samples can be well indexed to the pure cubic phase of Y2O3. The possible formation mechanism of the PAAS MSs, PAA-Y precursor, and Y2O3 HNSs are proposed and discussed in detail. Upon ultraviolet excitation, the obtained Y2O3:Ln(3+) (Ln = Eu, Dy, Er, Tm) HNSs exhibit strong red, yellow-green, blue, yellow emission, respectively. Moreover, a novel single-phased and near-UV-pumped white-light-emitting phosphor Y2O3:Tm3+, Dy3+ was also successfully fabricated through optimizing the molar ratio among Tm3+ and Dy3+ in the Y2O3 host. This material may find potential applications in field-emission display devices and white ultraviolet light-emitting diodes (UV LEDs). Furthermore, this synthesis route may be of great significance in the preparation of other hollow spherical materials. (C) 2014 Elsevier B.V. All rights reserved.
机译:开发了一种新颖,快速,简单的方法,以聚丙烯酸丙烯酸钠盐微球(PAAS MSs)为活性成分,在温和条件下合成了具有彩色下转换发光的无掺杂镧系元素掺杂的氧化钇空心纳米球(Y2O3中心点HNSs)。模板,然后进行后续的煅烧过程。使用各种技术已很好地研究了结构,形态,形成过程和荧光性质。结果表明,样品可以很好地索引到Y2O3的纯立方相。提出并详细讨论了PAAS MS,PAA-Y前体和Y2O3 HNS的可能形成机理。在紫外线激发下,获得的Y2O3:Ln(3+)(Ln = Eu,Dy,Er,Tm)HNS分别显示出强红色,黄绿色,蓝色和黄色发射。此外,通过优化Y2O3主体中Tm3 +和Dy3 +之间的摩尔比,还成功地制备了新型单相且近紫外泵浦的发射白光的荧光粉Y2O3:Tm3 +,Dy3 +。这种材料可能会在场发射显示设备和白色紫外发光二极管(UV LED)中找到潜在的应用。此外,该合成路线在制备其他空心球形材料中可能具有重要意义。 (C)2014 Elsevier B.V.保留所有权利。

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