硅酸盐学报2017，Vol.45Issue(4)：536-541,6.DOI:10.14062/j.issn.0454-5648.2017.04.12
不同结构LaBO3:Eu3+发光粉合成及其发光性能
Synthesis and Luminescence Properties of LaBO3:Eu3+ Phosphors with Different Structures
摘要
Abstract
A series of LaBO3:Eu3+ phosphors were prepared by a sol-gel combustion method with different amounts of citric acid and annealing temperatures. The results show that LaBO3:Eu3+ phosphors with monoclinic system can be obtained by annealing precursor of molar ratio of citric acid to rare earth ions being 1:1 at 700℃. The orthorhombic LaBO3:Eu3+ is obtained when the annealing temperature and the amount of citric acid are increased. The morphology of LaBO3:Eu3+ can be changed under different synthesis conditions. The emission intensity attributed to5D0→7F2 transitions of Eu3+ is similar to that attributed to5D0→7F1 transitions for monoclinic LaBO3:Eu3+, and the main emission peaks of orthorhombic LaBO3:Eu3+ originate from5D0→7F2 transitions of Eu3+. The luminescence intensity of orthorhombic LaBO3:Eu3+ phosphors is more intense than that of monoclinic LaBO3:Eu3+. The 5D0→7F2/5D0→7F1 relative emission intensity ratios show that the local symmetry environment around Eu3+ ions decreases in orthorhombic LaBO3: Eu3+ compared to monoclinic LaBO3:Eu3+. The luminescence intensity and local symmetry environment around Eu3+ ions are related to the amount of citric acid and annealing temperature. The optimal Eu3+ doping amount of LaBO3:Eu3+ phosphors is 5%.关键词
溶胶-凝胶燃烧法/掺铕硼酸镧/发光粉/发光性能Key words
sol-gel combustion method/europium-doped lanthanum borate/phosphors/luminescence property分类
数理科学引用本文复制引用
赵婉男,马晶,张振乾,李艳红..不同结构LaBO3:Eu3+发光粉合成及其发光性能[J].硅酸盐学报,2017,45(4):536-541,6.基金项目
辽宁省教育厅科学技术研究项目(L2011063). （L2011063）
