中南大学学报（自然科学版）2016，Vol.47Issue(11)：3715-3720,6.DOI:10.11817/j.issn.1672-7207.2016.11.014
Dy3+对NaLaF4：Yb3+/Er3+/Dy3+双功能纳米晶的上转换发光及顺磁性调制作用
Tuning upconversion luminescence and paramagnetic property of NaLaF4:Yb3+/Er3+/Dy3+bifunctional nanocrystals by Dy3+
摘要
Abstract
NaLaF4:Yb3+/Er3+/Dy3+bifunctional magnetic-optical nanocrystals were synthesized by solvothermal method. Combined with the energy level transition diagram, the energy transfer between the 6FJ and 6HJ series level of Dy3+and Er3+ was discussed. The results show that the energy transfer can cause a special magnetic-optical modulation phenomenon. Green light is emitted which is centered at 522 nm and 547 nm under the excitation of 980 nm infrared light. With the increase of the laser power, the intensity of the green emission increases. The upconversion luminescence and paramagnetic characteristics of the samples can be modulated by adjusting the doping concentration of Dy3+.As the concentration of Dy3+increases from 0 to 5%, emission peaks centered at 522 nm gradually increase with respect to the 547 nm emission peaks. If the concentration of Dy3+is further increased to 10%, the relative intensity decreases. With the increase of the concentration of Dy3+ from 0 to 10%, the paramagnetic properties of the sample are enhanced, but the overall emission intensity is attenuated.关键词
光磁/双功能/稀土离子/掺杂Key words
magnetic-optical/bifunctional/rare earth ions/doping分类
通用工业技术引用本文复制引用
胡仕刚,吴笑峰,席在芳,唐志军,刘云新..Dy3+对NaLaF4：Yb3+/Er3+/Dy3+双功能纳米晶的上转换发光及顺磁性调制作用[J].中南大学学报（自然科学版）,2016,47(11):3715-3720,6.基金项目
国家自然科学基金资助项目(61376076,61274026,21301058,61377024)；湖南省教育厅资助项目(14B060)；湖南省科技计划项目(2014FJ2017,2013FJ2011)(Projects(61376076,61274026,21301058,61377024) supported by the National Natural Science Foundation of China （61376076,61274026,21301058,61377024）
Project(14B060) supported by the Scientific Research Fund of Education Department of Hunan Province （14B060）
Projects(2014FJ2017,2013FJ2011) supported by the Science and Technology Plan Foundation of Hunan Province) （2014FJ2017,2013FJ2011）
