余辉
荧光粉
发光
持续发光
化学
兴奋剂
稀土
离子
分析化学(期刊)
矿物学
材料科学
光电子学
物理
环境化学
热释光
有机化学
伽马射线暴
天文
作者
Fei Qin,Chengkang Chang,Dali Mao
标识
DOI:10.1016/j.jallcom.2004.06.096
摘要
Long lasting afterglow phosphors Sr2MgSi2O7:Eu,Dy and Ca2MgSi2O7:Eu,Dy were prepared by solid-state reaction method. It is revealed by the results that both phosphors show two emission peaks that are caused by the different emitting centers Eu2+ held in the host lattice. Wavelength shift was observed due to the slight differences in the structure parameters of the two hosts. Investigation on afterglow property shows that Sr2MgSi2O7:Eu,Dy phosphor held a better afterglow property than Ca2MgSi2O7:Eu,Dy phosphor. Thermal simulated luminescence study indicates that the long afterglow is generated by a higher trap concentration formed by the co-doped rare earth ions within the host.
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