【作者】 陈仁； 王银海； 胡义华； 柳成；

【Author】 CHEN Ren WANG Yin-hai HU Yi-hua LIU Cheng (School of Physics and Optoelectronic Engineering,Guang dong University of Technology,Guangzhou 510006,China)

【机构】 广东工业大学物理光电工程学院；

【摘要】 采用燃烧合成方法,在600℃温度条件下, 首次合成镱,钕掺杂的 SrAl₂O₄：Eu²⁺,Dy³⁺长余辉光致发光材料。通过 X 射线衍射和发射光谱分析,结果表明镱或钕的掺杂几乎没有改变材料的晶体结构以及 Eu²⁺发光中心电子的4f⁶5d→4f⁷的跃迁环境。余辉衰减特性曲线显示,与 SrAl₂O₄：Eu²⁺,Dy³⁺相比较,SrAl₂O₄： Eu²⁺,Dy³⁺,Yb³⁺的初始发光亮度有明显提高,余辉时间略微减小,而 SrAl₂O₄：Eu²⁺,Dy³⁺,Nd³⁺的初始亮度却大幅度的降低,同时余辉时间也降低。热释发光实验的进一步研究发现,不同的发光体存在不同深度的陷阱能级,而且陷阱能级的深度与余辉时间相对应。更多还原

【Abstract】 SrAl₂O₄:Eu²⁺,Dy³⁺phosphor by ytterbium or neodymium doping were synthesized by the combustion method at the temperature of 600℃.X-ray diffraction patterns and emission spectra indicate the ytterbium or neodymium doping almost do not make any change of the crystal structure and the Eu²⁺transition environment between 4f⁶5d and 4f⁷ .The decay curves demonstrate that the decay time and initial intensity can be modified by the various doping.The further research of thermal stimulated luminescence discovers that different trap levels exist in various phosphors and the depth of the trap levels are well corresponded with decay time of the phosphors.更多还原