具有磷灰石结构的LaBa(SiO)F:Dy荧光粉的结构与发光性能
Structure and luminescence properties of LaBa(SiO)F:Dy phosphor with apatite structure.
作者信息
Zhang Jialei, Guo Qingfeng, Liao Libing, Wang Yongjie, He Mingyue, Ye Huan, Mei Lefu, Liu Haikun, Zhou Tianshuai, Ma Bin
机构信息
School of Gemology, China University of Geosciences Beijing 100083 China
Jewelry and Mineral Materials Laboratory of Experimental Teaching Demonstration Center Beijing China.
出版信息
RSC Adv. 2018 Nov 19;8(68):38883-38890. doi: 10.1039/c8ra08324j. eCollection 2018 Nov 16.
In this study, we investigated the structure, luminescence properties and morphology of LaBa(SiO)F:Dy in detail using X-ray diffraction (XRD), photoluminescence spectroscopy, scanning electron microscopy (SEM) and decay kinetics measurements. The results indicate that LaBa(SiO)F:Dy was well crystallized, and its structure is of apatite-type and belongs to the hexagonal system. The prepared samples exhibit two intense characteristic bands in the blue (484 nm) and yellow (579 nm) spectral ranges corresponding to the Dy transitions F → H and F → H, respectively. These dominant photoluminescence bands are accompanied by a weak red band (670 nm) due to the F → H transition. The emission color of LaBa(SiO)F:Dy phosphors are found to fall in the white light region. The Dy optimal dopant concentration in the LaBa(SiO)F host was found to be 0.12 (mol). In addition, the phosphors have high thermal stability. Hence, LaBa(SiO)F:Dy may have an application in white light-emitting diodes.
在本研究中，我们使用X射线衍射（XRD）、光致发光光谱、扫描电子显微镜（SEM）和衰减动力学测量详细研究了LaBa(SiO)F:Dy的结构、发光特性和形貌。结果表明，LaBa(SiO)F:Dy结晶良好，其结构为磷灰石型，属于六方晶系。制备的样品在蓝色（484 nm）和黄色（579 nm）光谱范围内分别表现出两个强烈的特征带，对应于Dy的F→H和F→H跃迁。这些主要的光致发光带伴随着由于F→H跃迁产生的弱红色带（670 nm）。发现LaBa(SiO)F:Dy荧光粉的发射颜色落在白光区域。发现LaBa(SiO)F基质中Dy的最佳掺杂浓度为0.12（摩尔）。此外，该荧光粉具有高热稳定性。因此，LaBa(SiO)F:Dy可能在白光发光二极管中有应用。
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