中国物理B ›› 2013, Vol. 22 ›› Issue (7): 77801-077801.doi: 10.1088/1674-1056/22/7/077801
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
边柳, 王婷, 宋振, 刘朝晖, 李嘉旭, 刘泉林
Bian Liu (边柳), Wang Ting (王婷), Song Zhen (宋振), Liu Zhao-Hui (刘朝晖), Li Jia-Xu (李嘉旭), Liu Quan-Lin (刘泉林)
摘要: A single-phased silicate compound (Ba1-xCex)9(Sc1-yMny)2Si6O24 was prepared by solid-state reaction at high temperature. From powder X-ray diffraction (XRD) analysis, the formation of Ba9Sc2Si6O24 with 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.
中图分类号: (Photoluminescence, properties and materials)