Structural consideration on the emission properties of Eu2+-doped Ba(Sr, Ca)2MgSi2O8
Structural consideration on the emission properties of Eu2+-doped Ba(Sr, Ca)2MgSi2O8
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Eu2 掺杂 Ba(Sr, Ca)2MgSi2O8 发射特性的结构考虑
DOI：
10.1016/j.jssc.2013.01.036
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发表时间：
2013
影响因子：
3.3
通讯作者：
Y. Yonesaki
中科院分区：
文献类型：
--
作者：
Y. Yonesaki
从Rietveld法细化的晶体结构角度讨论了Eu2+掺杂Ba(Sr, Ca) 2mgsi2o8的发射特性。Ba(Sr, Ca) 2mgsi2o8具有glaserite型层状结构。响应Sr/(Sr+Ca)比，mgo6八面体和sio4四面体的角共享构建的层框架围绕c3轴扭曲，以匹配b位阳离子（Sr2+/Ca2+）的大小。这种扭曲会显著影响细胞的大小和b位点周围的协调环境。Eu2+掺杂的Ba(Sr, Ca) 2mgsi2o8在紫外照射下呈现蓝色发射。发射光谱的特征是由Eu2+离子占据A-和b -位点产生的两个发射组分。两种组分在不同Sr/(Sr+Ca)下表现出相似的波长位移，这是对si - o1极化和结构变化的响应。
Emission properties of Eu2+-doped Ba(Sr, Ca)2MgSi2O8are discussed in terms of the crystal structure refined by Rietveld method. Ba(Sr, Ca)2MgSi2O8has glaserite-type layered structure. In response to Sr/(Sr+Ca) ratio, the layer-framework build up by corner-sharing of MgO6octahedra and SiO4tetrahedra twists around C3axes to match the size of B-site cation (Sr2+/Ca2+). This twist significantly affects the unit cell size and the coordination environment around B-site. Eu2+-doped Ba(Sr, Ca)2MgSi2O8exhibited blue emission under ultraviolet irradiation. The emission spectra have been characterized by two emission components derived from Eu2+ions occupying A- and B-site. Both components showed similar wavelength shift for different Sr/(Sr+Ca), in response to Si–O1polarization and to the structural change.