Blue Light Emission from Stress-Activated CaYAl3O7 : Eu
Blue Light Emission from Stress-Activated CaYAl3O7 : Eu
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DOI：
10.1149/1.2890856
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发表时间：
2008-05
影响因子：
3.9
通讯作者：
Hongwu Zhang;Hiroshi Yamada;N. Terasaki;Chao‐Nan Xu
中科院分区：
文献类型：
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作者：
Hongwu Zhang;Hiroshi Yamada;N. Terasaki;Chao‐Nan Xu
我们发现CaYAl3O7：Eu荧光粉在机械应力作用下发出蓝光，称为机械发光（ML）。研究了烧结温度对光致发光（PL）和ML的影响，以获得合适的合成条件。结果表明，在1300°C下烧结的样品显示出较强的PL和ML强度，而进一步加热会导致PL和ML的淬灭。ML和PL光谱相似，说明ML和PL是从Eu 2+离子的同一中心发射的。当在1300°C下烧结的样品被压缩时，可以通过肉眼观察到这种蓝色ML发射。CaYAl3O7：Eu的ML强度随机械载荷的增加而成比例增加.
We have revealed that CaYAl 3 O 7 :Eu phosphor emits blue light under the application of mechanical stress, called mechanoluminescence (ML). The influences of sintering temperature on photoluminescence (PL) and ML were investigated in order to gain suitable synthesis conditions. The results revealed that the sample sintered at 1300°C shows strong PL and ML intensities, while further heating induces quenching of PL and ML. The ML and PL spectra are similar, which indicates that ML is emitted from the same center of Eu 2+ ions as PL. This blue ML emission can be observed by the naked eye when the sample sintered at 1300°C is compressed. Furthermore, the ML intensity of CaYAl 3 O 7 :Eu proportionally increased with the increase of mechanical load.