Tb^3＋ and Ce^3＋ co-activated LiZnPO4 phosphors with high luminescence efficiency were synthesized by a high temperature solid-state reaction at 1000 ℃ for 3 h. The XRD patterns, photoluminescence spectra and SEM we...Tb^3＋ and Ce^3＋ co-activated LiZnPO4 phosphors with high luminescence efficiency were synthesized by a high temperature solid-state reaction at 1000 ℃ for 3 h. The XRD patterns, photoluminescence spectra and SEM were recorded and the effects ofTb^3＋and Ce^3＋ concentration, sintering condition on the luminescent properties of as-synthesized phosphors were investigated. The emission spectra under ultraviolet （200-300 nm） radiation showed a dominant peak at 543 nm attributed to the ^5D4→^7F5 transition of Tb^3＋, which was greatly enhanced by the co-doping of Ce^3＋, indicating that there occurred an efficient non-radiative energy transfer from Ce^3＋ to Th^3＋. The optimal doping concentrations of Tb^3＋ and Ce^3＋ were determined to be 9% and 10%, respectively.展开更多
A novel organic fluorophor with high solid state luminescent efficiency based on 1,4-bis（2,2-di（pyridin-2-yl）- vinyl）benzene （BDP2VB） was designed and synthesized. It emits faintly in solution, but becomes a str...A novel organic fluorophor with high solid state luminescent efficiency based on 1,4-bis（2,2-di（pyridin-2-yl）- vinyl）benzene （BDP2VB） was designed and synthesized. It emits faintly in solution, but becomes a strong emitter in the aggregate state, demonstrating its aggregation induced emission （AIE） property. According to the crystal struc- ture analysis, J-type aggregation was formed in the packing mode of the molecule, which was demonstrated to be beneficial to gain high fluorescent quantum efficiency in solid state. Additionally, the emission color of BDP2VB can change dramatically in solid state as well as in solution by the protonation stimuli.展开更多
基金Project supported by National High Technology Research and Development Program of China,863 Program (2010AA03A407,2010AA03A408)the Foundation of Training Academic and Technical Header for Main Majors of Jiang xi of China (2007GG00800)
文摘Tb^3＋ and Ce^3＋ co-activated LiZnPO4 phosphors with high luminescence efficiency were synthesized by a high temperature solid-state reaction at 1000 ℃ for 3 h. The XRD patterns, photoluminescence spectra and SEM were recorded and the effects ofTb^3＋and Ce^3＋ concentration, sintering condition on the luminescent properties of as-synthesized phosphors were investigated. The emission spectra under ultraviolet （200-300 nm） radiation showed a dominant peak at 543 nm attributed to the ^5D4→^7F5 transition of Tb^3＋, which was greatly enhanced by the co-doping of Ce^3＋, indicating that there occurred an efficient non-radiative energy transfer from Ce^3＋ to Th^3＋. The optimal doping concentrations of Tb^3＋ and Ce^3＋ were determined to be 9% and 10%, respectively.
基金973 Program，the National Natural Science Foundation of China，the Research Fund for the Doctoral Program of Higher Education of China，the Project of Jilin Province
文摘A novel organic fluorophor with high solid state luminescent efficiency based on 1,4-bis（2,2-di（pyridin-2-yl）- vinyl）benzene （BDP2VB） was designed and synthesized. It emits faintly in solution, but becomes a strong emitter in the aggregate state, demonstrating its aggregation induced emission （AIE） property. According to the crystal struc- ture analysis, J-type aggregation was formed in the packing mode of the molecule, which was demonstrated to be beneficial to gain high fluorescent quantum efficiency in solid state. Additionally, the emission color of BDP2VB can change dramatically in solid state as well as in solution by the protonation stimuli.
