Photoluminescence properties of Ce3+ and Mn2+-activated Ba9Sc2Si6O24 phosphor for white light emitting diodes

被引:8
|
作者
Bian Liu
Wang Ting
Song Zhen
Liu Zhao-Hui
Li Jia-Xu
Liu Quan-Lin [1 ]
机构
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
基金
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词
Ba9Sc2Si6O24; Ce3+; Mn2+ co-doped; energy transfer; LUMINESCENCE PROPERTIES; CRYSTAL-STRUCTURE; ENERGY-TRANSFER; EXCITATION; ULTRAVIOLET;
D O I
10.1088/1674-1056/22/7/077801
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A single-phased silicate compound (Ba1-xCex)(9)(Sc1-yMny)(2)Si6O24 was prepared by solid-state reaction at high temperature. From powder X-ray diffraction (XRD) analysis, the formation of Ba9Sc2Si6O24 with an R3 space group was confirmed. In the photoluminescence spectra under ultraviolet (UV) ray excitation, the Ba9Sc2Si6O24:Ce3+, Mn2+ phosphor emits two distinctive color light bands: a blue one originating from Ce3+ and a red one caused by Mn2+. The energy transfer process from Ce3+ to Mn2+ was confirmed, the critical radius as well as the transfer efficiency was calculated, and the energy transfer mechanism was discussed. In addition, the decay-time testing indicates that the energy transfer efficiencies from Ce(1) to Mn2+ and Ce(2) to Mn2+ are different. The emission chromaticity of Ba9Sc2Si6O24:Ce3+, Mn2+ phosphor could be tuned from blue to red by altering the Ce3+/Mn2+ concentration ratio.
引用
收藏
页数:6
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