| Eu3+掺杂双钙钛矿Sr2CaMoO6橙红色荧光粉的结构特征及其发光性能 |
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| 引用本文： | 张 乐,鲁加加,刘金秋,李 月,王丽熙,张其土.Eu3+掺杂双钙钛矿Sr2CaMoO6橙红色荧光粉的结构特征及其发光性能[J].无机化学学报,2012,28(10):2036-2042. |
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| 作者姓名： | 张 乐 鲁加加 刘金秋 李 月 王丽熙 张其土 |
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| 作者单位： | 1. 南京工业大学材料科学与工程学院,南京,210009
2. 中国中材国际工程股份有限公司(南京),南京,211100 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，江苏省自然科学基金，江苏省普通高校研究生科研创新计划，江苏高校优势学科建设工程资助项目 |
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| 摘 要： | 采用EDTA-柠檬酸联合配位法制备一系列组成的(Sr1-xEux)2CaMoO6橙红色荧光粉。通过X射线衍射、拉曼光谱、扫描电镜及荧光光谱研究不同Eu3+离子掺杂浓度下Sr2CaMoO6∶Eu3+荧光粉的晶体结构、掺杂位置、形貌及其光致发光性能。Rietveld全谱拟合结果表明:掺杂后样品为(Ca/Mo)O6八面体少量倾斜的空间群为P21/n的正交双钙钛矿结构,随着Eu3+离子共掺杂浓度的增加,样品的晶胞体积减小;Eu3+离子取代八面体间隙的Sr2+位置致使双钙钛矿的T2g(1)拉曼振动模发生蓝移;在近紫外区宽而强电荷迁移带和蓝光激发下,该荧光粉分别发射以Eu3+离子5D0-7F1磁偶极跃迁为主的橙光和以5D0-7F2电偶极跃迁为主的红光,组成为(Sr0.98Eu0.02)2CaMoO6的荧光粉具有最强的橙红光发射强度,是一种潜在的适用于近紫外LED芯片的光转换红光材料。
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| 关 键 词： | 双钙钛矿 红色荧光粉 拉曼光谱 光致发光 白光LED |
Structure and Luminescent Properties of Eu3+ Doped Double Perovskite Sr2CaMoO6 Orange-Red Phosphors |
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| ZHANG Le,LU Jia-Ji,LIU Jin-Qiu,LI Yue,WANG Li-Xi and ZHANG Qi-Tu.Structure and Luminescent Properties of Eu3+ Doped Double Perovskite Sr2CaMoO6 Orange-Red Phosphors[J].Chinese Journal of Inorganic Chemistry,2012,28(10):2036-2042. |
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| Authors: | ZHANG Le LU Jia-Ji LIU Jin-Qiu LI Yue WANG Li-Xi and ZHANG Qi-Tu |
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| Institution: | College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China,Sinoma International Engineering Co., Ltd. (Nanjing), Nanjing 211100, China,College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China,College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China,College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China and College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China |
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| Abstract: | Series of (Sr1-xEux)2CaMoO6 orange-red phosphors were prepared by EDTA-citric acid complexing method. The crystal structure, doping site, morphology, and photoluminescent properties under different Eu3+ concentrations were investigated by XRD, Raman spectra, SEM and fluorescence spectra. The results by Rietveld method indicate that the structure of Eu3+ doped samples is orthorhombic double-perovskite with space group P21/n and slightly tilting octahedron of (Ca/Mo)O6. With increasing Eu3+ concentration, their lattice volumes decrease monotonously. Raman active mode T2g(1) is shifted to blue side resulting from the substitution of Sr2+ in interstitial site among octahedrons by Eu3+ ions. Under the excitation of broad and strong charge transfer band in near-UV range and blue light, the phosphor could emit a dominant orange light and a dominant red light, respectively. The (Sr0.98Eu0.02)2 CaMoO6 phosphor has the strongest orange-red emission and this phosphor is a potential light conversion red material for N-UV LED chip. |
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| Keywords: | double perovskite red phosphor Raman spectrum photoluminescence white LED |
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