期刊
JOURNAL OF LUMINESCENCE
卷 132, 期 6, 页码 1407-1413出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2012.01.016
关键词
Lattice distortion; Energy transfer; Luminescence enhancement; Red emission
类别
资金
- NSFC [50972143, 51072198, 20967004]
- Fujian Provincial Key Laboratory of Nanomaterials [2006L2005]
- Higher-level talents of Inner Mongolia University [Z20090106]
This work reports a systematic study on bridging between structure and optimum luminescence for Ce1-xGdxF3:Eu3+ nanoparticles. It is found that all Ce1-xGdxF3:Eu3+ nanoparticles were nearly monodispersed, showing average grain diameter of 30-35 nm. Regardless of the dopant level, all nanocrystals crystallized in a single hexagonal phase. With increasing Gd3+ content, the lattice dimension for Ce1-xGdxF3:Eu3+ linearly decreased, which was followed by the highly distorted lattice symmetry surrounding Eu3+. The consequence of the structural modification is that the color purity was significantly improved. Furthermore, the excitation energy of Ce3+ in the ultraviolet range was efficiently transferred to Eu3+ ions via the sensitizer Gd3+, which significantly enhanced the red emission and showed a maximized quantum efficiency of 59.7%. (C) 2012 Elsevier B.V. All rights reserved.
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