Photoluminescence and electrical properties of Eu3+ doped CaBi8Ti7O27 intergrowth ceramics
Photoluminescence and electrical properties of Eu3+ doped CaBi8Ti7O27 intergrowth ceramics
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Eu3掺杂CaBi8Ti7O27共生陶瓷的光致发光和电学性能
DOI：
10.1007/s10854-018-8630-2
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Xiang Xia
中科院分区：
文献类型：
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作者：
Gang Fan;Xiangping Jiang;Chao Chen;Yunjing Chen;Keyi Du;Na Tu;Xingan Jiang;Xiang Xia
采用固相反应法合成了CaBi 8 − xEuxTi 7 O27（CBT-BIT-xEu 3+，x= 0.00、0.05、0.10、0.15和0.20）共生结构陶瓷。通过高分辨透射电镜（HR-TEM）沿着[]区轴方向观察到了明显的共生结构。拉曼谱表明，Eu 3+优先占据赝钙钛矿层中的A位，增加了TiO 6八面体的正交性和结构畸变程度，GSAS软件计算得到的精细结构参数进一步支持了这一结论。由于增加的正交性，居里温度从纯CBT-BIT的736 °C增加到CBT-BIT-0.1Eu3+陶瓷的758 °C。同时，CBT-BIT-0.1Eu3+获得了最强的橙红色发光，其色坐标为（0.627，0.372），表明该材料在高温电光应用中具有潜在的应用前景。
CaBi8−xEuxTi7O27(CBT-BIT-xEu3+,x= 0.00, 0.05, 0.10, 0.15, and 0.20) intergrowth-structured ceramics were synthesized using a solid-state reaction method. The intergrowth structures were successfully obtained and clearly observed by HR-TEM along the [] zone axis. Raman patterns indicated that Eu3+preferred to occupy the A sites in pseudo-perovskite layers and increased the orthorhombicity and structural distortion degree of TiO6octahedra, which was further supported by refined structural parameters produced by GSAS software. As a consequence of increased orthorhombicity, the Curie temperature was increased from 736 °C for pure CBT-BIT to 758 °C for CBT-BIT-0.1Eu3+ceramic. Simultaneously, CBT-BIT-0.1Eu3+achieved the strongest red–orange emission and the CIE chromaticity coordinates calculated to be (0.627, 0.372), which suggested the potential applications of this material in high-temperature electrooptic applications.