Cui Cai-e, Li Jian, Huang Ping, Liang Li-ping, Wu Yin-lan
Department of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2012 Jan;32(1):65-8.
The Eu2+ and Dy3+ ion co-doped Sr3Al2O6 phosphor powders with long afterglow were prepared with high temperature solid-state reaction. The phase and the spectra properties of the material were characterized by X-ray diffraction (XRD) and fluorescence spectrophotometer. It was found that the sample is composed of pure Sr3Al2O6 phase. Furthermore, the emission peak of 537 nm under 360 nm excitation and that of 590 nm excited by 468 nm-light were obtained, respectively, and it is more interesting that the emission peaks were at 537 and 590 nm under 394 nm excitation. The effects of different excitation wavelengths on the emission spectrum were explained reasonably by the effect of nephelauxetic effect and crystal field. It revealed that the two types of luminescence with different color were caused by the differences of the center of gravity of the 5d excited state energy level and the split range of 5d energy level.
采用高温固相反应法制备了具有长余辉的Eu2+和Dy3+离子共掺杂Sr3Al2O6荧光粉。通过X射线衍射（XRD）和荧光分光光度计对材料的相结构和光谱特性进行了表征。结果表明，样品由纯Sr3Al2O6相组成。此外，分别获得了360nm激发下537nm的发射峰和468nm光激发下590nm的发射峰，更有趣的是，在394nm激发下发射峰位于537和590nm处。通过电中性效应和晶体场效应合理解释了不同激发波长对发射光谱的影响。结果表明，两种不同颜色的发光是由5d激发态能级重心和5d能级分裂范围的差异引起的。
