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Investigation on the improvement of red phosphorescence in CaTiO3:Pr3+ nanoparticles |
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| Authors: | Xianmin Zhang Jiahua Zhang Meiyuan Wang X Zhang H Zhao Xiao-Jun Wang |
| Institution: | 1. Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 16 Eastern South Lake Road, Changchun 130033, China;2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China;3. Department of Physics, Georgia Southern University, Statesboro, GA 30460, USA;1. Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain;2. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, 28049 Madrid, Spain;3. Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain |
| Abstract: | Red phosphorescence in nanosized CaTiO3:Pr3+ phosphors has been investigated by measuring the spectra of emission and excitation, as well as the charging and decay processes. The emission intensity and the persistent time have been improved. More energy traps have been observed in nanoparticles compared to the bulk powders. The integral emission intensity from the nanoparticles is remarkably greater than that from the bulk. A phosphorescence recombination mechanism through tunneling in nanoparticles is discussed. |
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