共 11 条
Displacement and luminescence of Eu3+ in CaYBO4
被引:0
作者:
Zeng, XQ
Hong, GY
You, HP
Kim, CH
机构:
[1] Chinese Acad Sci, Changchun Inst Appl Chem, Lab Rare Earth Chem & Phys, Changchun 130022, Peoples R China
[2] Korea Inst Sci & Technol, Div Appl Sci, Seoul 130650, South Korea
关键词:
rare earths;
europium;
CaYBO4;
lattice displacement;
luminescence;
D O I:
暂无
中图分类号:
O69 [应用化学];
学科分类号:
081704 ;
摘要:
CaY1-xBO4: xEu was synthesied by solid state reaction method, and the displacement and luminescence of the Eu3+ in CaYBO4 host were studied. Two luminescent centers could be observed at certain Eu3+-concentration, indicating that the Eu3+ occupies two different crystallographic sites. This result shows that the Eu3+ occupies two different Y3+ sites in CaYBO4. The investigation on Eu-O charge transfer bands indicates that the larger distortion or the lower symmetry of Eu3+ site is,the shorter wavelength of the Eu-O charge transfer band is. When the Eu3+-concentration is high (x > 0.10), Eu3+ occupies the sites of Ca2+ and is reduced to Eu2+.
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页码:182 / 185
页数:4
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