Synergistic effect of crystal structure and concentration quenching on photoluminescence of Er3+ doped upconversion nanocrystals
来源期刊:JOURNAL OF RARE EARTHS2016年第10期
论文作者:蔡灿英 靳彦林 杨奇斌 聂晓书 刘云新
文章页码:963 - 971
摘 要:YbF2.357, YbF3, Ba2 YbF7, and Ba 2 upconversion nanocrystals doped with emitter Er3+ ion were synthesized in the same solvent system just with changing the molar ratio of Ba2+ to Yb3+ in the precursor, which corresponed to the crystal phases of rhombohedral, orthorhombic, tetragonal, and cubic, respectively. All the samples emitted both 660 nm red light and 543/523 nm green light which originated from Er3+-4fn electronic transitions 4F9/2-4I15/2 and 4S3/2/2H11/2-4I15/2, respectively. It was worth mentioning that YbF 3:Er3+, Ba2 YbF7:Er3+, and BaF2:Er3+ could emit dazzlingly bright light even under the excitation of a 980 nm CW laser with output power of 0.1 W. Upconversion emission mechanism analysis indicated that the intensity ratio of red to green light highly depended on the synergistic effect of crystal structure, concentration quenching, and particle size, but were not sensitive to crystallinity as previously reported for NaL nF4(Ln=lanthanide).
蔡灿英1,2,靳彦林1,2,杨奇斌1,2,聂晓书1,2,刘云新3
1. Faculty of Materials, Optoelectronics and Physics, Xiangtan University2. Key Laboratory of Low Dimensional Materials and Application Technology, Xiangtan University, Ministry of Education3. Department of Physics and Electronic Science, Hunan University of Science and Technology
摘 要:YbF2.357, YbF3, Ba2 YbF7, and Ba 2 upconversion nanocrystals doped with emitter Er3+ ion were synthesized in the same solvent system just with changing the molar ratio of Ba2+ to Yb3+ in the precursor, which corresponed to the crystal phases of rhombohedral, orthorhombic, tetragonal, and cubic, respectively. All the samples emitted both 660 nm red light and 543/523 nm green light which originated from Er3+-4fn electronic transitions 4F9/2-4I15/2 and 4S3/2/2H11/2-4I15/2, respectively. It was worth mentioning that YbF 3:Er3+, Ba2 YbF7:Er3+, and BaF2:Er3+ could emit dazzlingly bright light even under the excitation of a 980 nm CW laser with output power of 0.1 W. Upconversion emission mechanism analysis indicated that the intensity ratio of red to green light highly depended on the synergistic effect of crystal structure, concentration quenching, and particle size, but were not sensitive to crystallinity as previously reported for NaL nF4(Ln=lanthanide).
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