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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 >Hydrothermal synthesis of YBO_3:Tb~(3+) microflowers and their luminescence properties
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Hydrothermal synthesis of YBO_3:Tb~(3+) microflowers and their luminescence properties

机译：YBO_3：Tb〜（3+）微花的水热合成及其发光特性

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摘要

Three-dimensional flowerlike YBO_3:Tb~(3+) phosphors have been successfully prepared by an efficient surfactant-free hydrothermal process directly without further sintering treatment. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDS) spectrometry, selected area electron diffraction (SAED), photoluminescence (PL) spectra were used to characterize the samples. The as-obtained samples present flowerlike agglomerates composed of nanoflakes with thickness of 20 nm and high crystallinity in spite of the moderate reaction temperature of 180 °C. The reaction mechanism has been considered as a dissolution/precipitation mechanism; the self-assembly evolution process has been proposed on homocentric layer-by-layer growth style. The different luminescent intensity with different molar ratio of Y-Tb [Y:Tb = 8:2; 7:3; 6:4; 5:5; 4:6], YBO_3 :Tb~(3+) phosphors exhibit different light (white, red, green) under ultraviolet excitation, which might find potential applications in the fields such as light display systems and optoelectronic devices.
机译：无需进一步的烧结处理，直接通过高效的无表面活性剂水热工艺成功制备了三维花状YBO_3：Tb〜（3+）荧光粉。 X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），能量色散X射线（EDS）光谱，选择区域电子衍射（SAED），光致发光（PL）光谱用于表征样本。尽管反应温度为180°C，但所得样品仍呈现出由纳米薄片组成的花状附聚物，其厚度为20 nm，且结晶度高。反应机理被认为是溶解/沉淀机理。在同心层逐层生长方式上提出了自组装演化过程。 Y-Tb摩尔比不同时的发光强度也不同[Y：Tb = 8：2; 7：3; 6：4; 5：5; [4：6]，YBO_3：Tb〜（3+）荧光粉在紫外线激发下表现出不同的光（白色，红色，绿色），这可能会在光显示系统和光电设备等领域找到潜在的应用。

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