Microstructure and luminescence of surface-coated nano-BaMgAl10O17:Eu2+ blue phosphor
Microstructure and luminescence of surface-coated nano-BaMgAl10O17:Eu2+ blue phosphor
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表面包覆纳米BaMgAl10O17:Eu2蓝色荧光粉的微观结构及发光性能
DOI：
10.1016/j.jallcom.2008.11.112
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发表时间：
2009-06-10
影响因子：
6.2
通讯作者：
Li, Shuidi
中科院分区：
文献类型：
--
作者：
Chen, Z.;Yan, Y. W.;Li, Shuidi
采用乳液法在BaMgAl10O17:Eu2+ (BAM)颗粒上制备了MgF2涂层。化学成分、显微组织。分别采用XRD、X射线光电子能谱(XPS)、透射电子显微镜(TEM)、能谱(EDS)和真空紫外(VUV)激发对表面涂层BAM的发光性能和发光性能进行了表征。结果表明，通过形成化学键，在 BAM 颗粒表面成功涂覆了一层致密均匀的 MgF2 薄膜。在表面涂覆的 BAM 荧光粉中观察到荧光寿命的延长，归因于涂层导致的非辐射率降低。由于纳米级BAM颗粒表面的悬挂键和缺陷被去除以及非辐射跃迁概率的降低，表面涂覆的BAM的发光性能得到改善。 (C) 2008 Elsevier B.V. 保留所有权利。
MgF2 coating on BaMgAl10O17:Eu2+ (BAM) particles was obtained by an emulsion method. The chemical compositions, microstructure. and luminescent performance of surface-coating BAM were characterized by XRD, X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), energy dispersion spectrum (EDS) and vacuum ultraviolet (VUV) excitation, respectively. The results indicate that a compact homogeneous MgF2 film is successfully coated on the surface of BAM particles by forming a chemical bond. Lengthening of fluorescence lifetimes were observed in surface-coated BAM phosphor attributed to less non-radiative rate due to coating. The luminescent performances of surface-coated BAM is improved due to the hanging-bonds and defects on the surface of nano-scale BAM particles being removed as well as non-radiative transition probability decreasing. (C) 2008 Elsevier B.V. All rights reserved.