Gong Yu, Wang Yuhua, Li Yanqin, Xu Xuhui, Zeng Wei
Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou, China.
Opt Express. 2011 Feb 28;19(5):4310-5. doi: 10.1364/OE.19.004310.
A novel long-lasting phosphorescence (LLP) material Ba4(Si3O8)2:Eu2+, Dy3+ with high chemical stability was achieved successfully. Two emission centers (Eu (I) and Eu (II)) were found in Ba4(Si3O8)2 due to the substitution of Eu2+ in different Ba2+ sites. Both Eu (I) and Eu (II) had contribution to the afterglow process, however, the decay rate of Eu (I) was higher than that of Eu (II). Ba3.982(Si3O8)2: 0.008Eu2+, 0.01Dy3+ exhibited a long-lasting phosphorescence whose duration was more than 24 h. Through the analysis of the thermoluminescence (TL) curves, we found that Eu2+ single doped Ba4(Si3O8)2 has a possibility to be a kind of storage phosphor. This work provides a new and efficient candidate for LLP and storage materials.
成功制备出一种具有高化学稳定性的新型长余辉（LLP）材料Ba4(Si3O8)2:Eu2+, Dy3+。由于Eu2+在不同Ba2+位点的取代，在Ba4(Si3O8)2中发现了两个发射中心（Eu (I)和Eu (II)）。Eu (I)和Eu (II)均对余辉过程有贡献，然而，Eu (I)的衰减速率高于Eu (II)。Ba3.982(Si3O8)2: 0.008Eu2+, 0.01Dy3+表现出持续时间超过24小时的长余辉。通过对热释光（TL）曲线的分析，我们发现Eu2+单掺杂的Ba4(Si3O8)2有可能成为一种存储磷光体。这项工作为长余辉和存储材料提供了一种新型高效的候选材料。
