Photoionization behavior of Eu2+-doped BaMgSiO4 long-persisting phosphor upon UV irradiation
作者： Y Li , Y Wang , Y Gong , X Xu , F Zhang
DOI: 10.1016/J.ACTAMAT.2011.01.057
关键词:
摘要: Abstract The fluorescence, phosphorescence and thermoluminescence properties of Eu-doped BaMgSiO4 phosphors sintered in air a reducing atmosphere were investigated. Phosphorescence phosphor can last for 1.5 h at recognizable intensity level, whereas air-sintered only persist 6 min. In addition, distinction between the shape fluorescence spectrum its corresponding is observed former case. Ionization Eu2+ to Eu3+ upon UV irradiation prepared atmosphere, but there no indication that photogenerated cannot change back divalent state room temperature after excitation source switched off. shows photochromism irradiation. No such photoionization behavior phosphor. A possible mechanism constructed on basis these experimental observations. presented also successfully explain Eu BaMgSiO4.
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