PHENOMENON AND MECHANISM OF LONG-LASTING PHOSPHORESCENCE IN Eu2+-DOPED ALUMINOSILICATE GLASSES
PHENOMENON AND MECHANISM OF LONG-LASTING PHOSPHORESCENCE IN Eu2+-DOPED ALUMINOSILICATE GLASSES
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DOI：
10.1016/s0022-3697(98)00070-5
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发表时间：
1998-09
影响因子：
4
通讯作者：
J. Qiua;M. Kawasaki;Katsuhisa Tanaka;Y. Shimizugawa;K. Hirao
中科院分区：
文献类型：
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作者：
J. Qiua;M. Kawasaki;Katsuhisa Tanaka;Y. Shimizugawa;K. Hirao
Eu ~（2+）掺杂的SrO-Al_2 O_3-SiO_2系统玻璃具有明亮、持久的磷光发光。用功率密度为2× 104 lux的白色荧光灯照射30 min后，在黑暗中肉眼可清楚地看到可见光（峰值在510 nm处），即使在去除活化光后24 h也是如此。基于X射线吸收光谱，我们认为Eu ~（2+）掺杂玻璃中的长余辉是由于玻璃基质中的浅陷阱中的电子和空穴复合而产生的，这种复合可以在室温下热释放。这些玻璃可能是有前途的节能显示材料，并有助于提高太阳能电池的转换效率。
Eu2+-doped glasses in the SrO–Al2O3–SiO2system show bright and long-lasting phosphorescence. After irradiation by a white-color fluorescent lamp with a power density of 2×104lux for 30min, a visible light (peaking at 510nm) can be clearly seen with the naked eye in the dark even 24h after removal of the activating light. Based on the X-ray absorption spectra, we suggest that the long-lasting phosphorescence in the Eu2+-doped glasses results from the recombination of electrons and holes at shallow traps in the glass matrix which can be thermally released at room temperature. These glasses may be promising materials for energy-saving display and useful for the improvement of the conversion efficiency of solar cells.