摘要
采用溶剂热法合成了核壳结构纳米荧光粉GdF_3∶Ce^(3+),Dy^(3+)@GdF_3∶Eu^(3+)。XRD衍射图样显示所制备纳米晶为正交相;在Ce^(3+)的8S7/2→6IJ激发峰激发下,该核壳结构具有明显的多色发光性能,而在相应的非核壳结构中却由于Ce^(3+)共掺导致Eu^(3+)出现荧光猝灭现象。基于CIE坐标,可以看出该体系的核壳结构具有比非核壳结构优越的发光性能,这主要是因为Gd^(3+)起到媒介离子的作用。最后,讨论了壳厚度对发光的影响,结果发现当核壳的量比为1∶3时,荧光粉具有最大的发光强度。
The core-shell structure nanophosphors GdF_3∶Ce^（3＋）,Dy^（3＋）@GdF_3∶Eu^（3＋）were synthesized via solvothermal method. XRD patterns show that the synthesized nanocrystallines（ NCs） are orthorhombic phase both for the core and shell. Under the excitation of8S7 /2→6IJof Ce^（3＋）,the core-shell structure nanophosphors exhibit well multicolor luminous performance,while for corresponding none core-shell structure nanophosphors,emission of Eu^（3＋）denotes obvious fluorescence quenching phenomenon due to co-doping Ce^（3＋）. Based on the CIE（ x,y） coordinate diagram,it can be seen that the core-shell structure nanophosphors own more excellent luminescent properties than that of the none core-shell structure nanophosphors due to the influence of Gd^（3＋）. Lastly,the influence of thickness of shell on lighting of the phosphors was discussed. It is found that the core-shell structure phosphors own the best emission intensity on condition that ratio of the core and shell is 1∶ 3.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2016年第10期1182-1188,共7页
Chinese Journal of Luminescence
基金
国家(级)国际科技合作项目(2015DFA61800)
江西省教育厅科学技术研究项目(GJJ151136)资助
关键词
GdF3纳米晶
核壳结构
多色发光
能量传递
GdF3NCs
core-shell structure
multicolor luminescence
energy transfer
