Sensitized red luminescence from Ce3+, Mn2+-doped glaserite-type alkaline-earth silicates
Sensitized red luminescence from Ce3+, Mn2+-doped glaserite-type alkaline-earth silicates
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DOI：
10.1016/j.jssc.2010.04.004
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发表时间：
2010-06
影响因子：
3.3
通讯作者：
Y. Yonesaki;T. Takei;N. Kumada;N. Kinomura
中科院分区：
文献类型：
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作者：
Y. Yonesaki;T. Takei;N. Kumada;N. Kinomura
化学成分为 M2BaMgSi2O8(M: Ba, Sr, Ca) 的 Ce、Mn 掺杂玻璃锌矿型碱土硅酸盐观察到亮红色发光。在紫外激发下，Ce 掺杂的 M2BaMgSi2O8 表现出强的近紫外发射，且峰形不对称。仅当 Ce3+ 离子一起掺杂时，紫外激发的 Mn 掺杂 M2BaMgSi2O8 化合物才显示出可见的红光发射。这些结果表明，Mn2+ 产生的红光发射是由从 Ce3+ 到 Mn2+ 的有效能量转移引起的。随着Ba量的增加，红色发射变得强烈。这种趋势源于Mn2+离子中3d-3d跃迁选择规则的放宽，这是由于Ba2+占据层袋而导致结构变形引起的。
Bright red luminescence is observed from Ce, Mn-doped glaserite-type alkaline-earth silicates with M2BaMgSi2O8(M: Ba, Sr, Ca) chemical composition. Under UV excitation, Ce-doped M2BaMgSi2O8exhibits strong near-UV emission with asymmetric peak shape. UV-excited Mn-doped M2BaMgSi2O8compounds show visible red emission only when Ce3+ions are doped together. These results indicate that Mn2+-derived red emission is caused by an efficient energy transfer from Ce3+to Mn2+. The red emission becomes intense with an increase in Ba-amount. This trend originates from the relaxation of the selection rule for 3d-3d transition in Mn2+ions, which is caused by the structural deformation due to Ba2+occupation for layer-pockets.