Sunlight activated long-lasting luminescence from Ba5Si8O21: Eu(2+),Dy(3+) phosphor.
Sunlight activated long-lasting luminescence from Ba5Si8O21: Eu(2+),Dy(3+) phosphor.
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DOI：
10.1021/ic5026312
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发表时间：
2015-01
影响因子：
4.6
通讯作者：
Pengjiu Wang;Xuhui Xu;Dacheng Zhou;Xue Yu;J. Qiu
中科院分区：
文献类型：
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作者：
Pengjiu Wang;Xuhui Xu;Dacheng Zhou;Xue Yu;J. Qiu
可见光持久性荧光粉是常用的自持夜视和荧光标记材料。从Ba4(Si3O8)2中六元环平面结构的启发，期望Ba5Si8O21具有类似的结构，可以表现出更优异的磷光性能。本文首次报道了Eu(2+)/Dy（3+）共掺杂Ba5Si8O21的新型可见长效发光荧光粉。Ba5Si8O21:Eu(2+),Dy（3+）荧光粉在阳光甚至恶劣天气条件下都能被有效激活，这主要归功于其激发光谱宽（200- 455nm），对太阳光谱中的UV-A和紫外光响应高。活化后，Ba5Si8O21:Eu(2+),Dy（3+）在380 ~ 680 nm处发出强荧光，发光时间超过16 h，且在水中也表现出优异且稳定的磷光，表明Ba5Si8O21:Eu(2+),Dy（3+）将是一种在各种露天环境下都能被自然光有效反复充电的全天候材料。此外，在余辉机制中阐释了量子隧穿行为。
Visible-light persistent phosphors are commonly used as self-sustained night vision and fluorescence labeling materials. From the inspiration of the structure of six-membered rings plane in Ba4(Si3O8)2, a similar structure of Ba5Si8O21 is expected that could exhibit more excellent phosphorescence property. In this Article, we report a novel visible long-lasting luminescence phosphor of Eu(2+)/Dy(3+) codoped Ba5Si8O21 for the first time. Ba5Si8O21:Eu(2+),Dy(3+) phosphor could be activated effectively by sunlight or even in severe weather conditions, which is mainly attributed to the broad excitation spectrum (200-455 nm) and highly responds to UV-A and violet-light in the solar spectrum. After activation, Ba5Si8O21:Eu(2+),Dy(3+) emits intense emission at 380-680 nm with persistent phosphorescence beyond 16 h. Moreover, it exhibits excellent and stable phosphorescence even in water, indicating that Ba5Si8O21:Eu(2+),Dy(3+) will be a all-weather material that can be effectively and repeatedly charged by natural daylight in all kinds of open-air environments. Furthermore, the quantum tunneling behavior was illustrated in the afterglow mechanism.