Morphology-controlled synthesis, growth mechanism and fluorescence of YF3:Eu3+, Bi3+
Morphology-controlled synthesis, growth mechanism and fluorescence of YF3:Eu3+, Bi3+
复制标题
YF3:Eu3 、 Bi3 的形貌控制合成、生长机制和荧光
DOI：
10.1016/j.materresbull.2017.08.014
复制
发表时间：
2017-11-01
影响因子：
5.4
通讯作者：
Lin, Dunmin
中科院分区：
文献类型：
--
作者：
He, Lihua;Xia, Li;Lin, Dunmin
近年来，无机材料的形态控制合成和相应的性能调节引起了人们的广泛关注。本文采用水热法可控合成了YF_3：0.125Eu（3+），0.5%Bi ~（3+）的稀土发光材料，其形貌包括球形、截顶八面体、八面体和准球形颗粒。通过改变反应温度和停留时间等合成参数，可以调节材料的相结构和形貌，从而调整材料的荧光性能。随着反应温度的升高，材料由KY 3F 10转变为YF 3，形貌由球形转变为八面体，最后转变为截顶八面体。随着停留时间的增加，样品也从KY 3F 10扩展到YF 3，形貌从球形到八面体，然后截短八面体，最后伪球形颗粒。提出了不同形貌的可能生长机制。材料的荧光强度与其形貌特征密切相关。在200 ℃保温18 h合成的YF 3：0.125Eu（3+），0.5%Bi（3+）晶体中，八面体截顶结构的缺陷少，晶粒尺寸大，发光强度最强。此外，已经证明本发明的发光材料可以潜在地用作发光墨水。(C)2017爱思唯尔有限公司版权所有
In recent years, morphology-controlled synthesis and corresponding property tuning in inorganic materials have attracted considerable attention. In this work, lanthanide luminescent materials of YF3:0.125Eu(3+), 0.5%Bi3+ with a variety of well-defined morphologies including spherical, truncated octahedron, octahedron and pseudo-sphere particle have been controllably synthesized via a facile hydrothermal method. Phase structure and morphology of the materials are tuned, and thus fluorescent properties are tailored by changing the synthetic parameters of reaction temperature and dwelling time. With increasing reaction temperature, the materials are transformed from KY3F10 to YF3, and the morphology varies from spherical to octahedron and finally truncated octahedra. When dwelling time increases, the samples also extend from KY3F10 to YF3 and the morphology changes from spherical to octahedron, then truncated octahedra and finally pseudo-sphere particle. The possible growth mechanism for diverse morphologies has been proposed. The fluorescence intensity of the materials is closely related to their morphologic characteristics. The YF3:0.125Eu(3+), 0.5%Bi3+ with truncated octahedra synthesized at 200 degrees C for 18 h presents the strongest emission intensity because of its less defects sites and large grain size. In addition, it has been demonstrated that the present luminescent materials can be potentially used as the luminescent ink. (C) 2017 Elsevier Ltd. All rights reserved.