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组合优化设计制备Y^3＋/Dy^3＋共掺Bi2ZnB2O7新型荧光粉的发光性质

ISSN号：1004-4213
期刊名称：《光子学报》
时间：0
分类：O433.4[机械工程—光学工程;理学—光学;理学—物理]
作者机构：[1]大连海事大学物理系,辽宁大连116026
相关基金：国家自然科学基金（Nos.51002041,11104024,11274057,11104023,11374044）; 中央高校基本科研业务费专项资金（Nos.3132013317,3132013100）; 国家重点基础研究发展计划（No.2012CB626801）资助

作者：石琳琳[1], 孙佳石[1], 翟梓会[1], 李香萍[1], 张金苏[1], 陈宝玖[1]

关键词：优化-数学模型, 稀土元素, 发射光谱, 荧光光谱, 发光, 试验优化设计, Optimization-mathematical models, Rare earth elements, Optical emission spectroscopy, Fluorescence spectroscopy, Optics, Optimal design of experiments

中文摘要：

为获得Bi2ZnB2O7：Y^3＋/Dy^3＋新型荧光粉材料的最强黄光发光强度,运用均匀设计和二次通用旋转组合设计相结合法对Y^3＋/Dy^3＋最佳离子掺杂浓度进行优化研究,得到Y^3＋和Dy^3＋离子的最佳掺杂浓度分别为4.498mol%和6.001mol%.采用高温固相法合成最优样品,对样品结构进行表征,测定其激发光谱和发射光谱对Dy^3＋离子在Bi2ZnB2O7基质中的发光性质,研究发现：样品在452nm激发下,发射光谱主要由（460～500nm）蓝光发射、（550～610nm）黄光发射、（650～700nm）红光发射组成,分别对应于Dy^3＋的^4F9/2→^6H15/2、^4F9/2→^6H13/2及^4F9/2→^6H11/2跃迁;Bi2ZnB2O7基质为Dy^3＋提供了非中心对称的晶格格位;最优样品中Dy^3＋的荧光寿命为0.427ms,与相同浓度Dy^3＋单掺杂样品相比较可知引入Y^3＋在一定程度上提高了发光强度.

英文摘要：

In order to obtain the strongest yellow luminescence intensity of the novel Bi2ZnB2O7：Y^3＋/Dy^3＋phosphor,uniform design and quadratic general rotary unitized design were combined to optimize Y^3＋/Dy^3＋ions doping concentrations,the result shows that the optimum doping concentrations of Y^3＋/Dy^3＋were 4.498mol%and 6.001mol%,respectively.High temperature solid state method was applied to synthesize the optimal sample,and the crystal structure and luminescent properties were investigated.The emission spectra of the samples under 452 nm excitation were observed,where the blue emission band was at around 460～500nm,the yellow emission was at around 550～610nm and the weaker peak of the red emission is at around 650～700nm.They were corresponding to the emissions from the ^4F9/2excited state to the ^6H15/2,^6H13/2 and^ 6H11/2 ground states,respectively.The result indicates that the Dy^3＋ions were located at a non-centrosymmetric site in the host lattice.Besides,the luminescence decay curve illustrated that the fluorescence lifetime of Dy^3＋was 0.427 ms.It was found from the comparison between the optimized and the single-doped samples with the same Dy^3＋concentration that Y^3＋-introduction could improve the emission intensity of the studied phosphor in a certain degree.