Enhanced red phosphorescence in nanosized CaTiO3 : Pr3+ phosphors
Enhanced red phosphorescence in nanosized CaTiO3 : Pr3+ phosphors
复制标题
纳米 CaTiO3 : Pr3 荧光粉中增强的红色磷光
DOI:
10.1063/1.2722205
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发表时间:
2007-04
影响因子:
4
通讯作者:
Wang, Xiao-jun
中科院分区:
文献类型:
--
作者:
Wang, Meiyuan;Zhang, Xianmin;Zhang, Jiahua;Nie, Zhaogang;Ren, Xinguang;Wang, Xiao-jun
The red photoluminescence and phosphorescence originating from D21-H43 transition of Pr3+ in CaTiO3 nanoparticles are studied as a function of Pr3+ concentrations. The nanophosphors exhibit both longer persistence time of 30min and higher quenching concentration of 0.4mol% than the bulk (10min and 0.1mol%). The initial phosphorescence in the nanophosphor is an order of magnitude stronger than that in the bulk at the corresponding quenching concentrations. Phosphorescence decay patterns and diffused reflectance spectra before and after ultraviolet exposure indicate the existence of more traps contributing to phosphorescence in the nanoparticles.
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