SrAl₂O₄：Eu²⁺的长余辉发光特性的研究

SrAl 2 O 4 ：Eu 2+ 的长余辉发光特性的研究 THE STUDY ON LONG PERSISTENCE OF SrAl 2 O 4 ：Eu 2+ 唐明道 Tang Mingdao 1 first-author 李长宽 Li Changkuan 1 高志武 Gao Zhiwu 1 许少鸿 Xu Shaohong 2 蒋雪茵 Jiang Xueyin 2 蔡锟 Cai Kun 2 中国科学院长春物理研究所 长春,130021 中国科学院长春物理研究所 长春,130021 Changchun Institute of Physics Academy of Sciences Changchun Institute of Physics Academy of Sciences 上海科学技术大学 上海,201800 上海科学技术大学 上海,201800 Shanghai University of Sciences and Technology Shanghai University of Sciences and Technology 本文研究了SrAl 2 O 4 :Eu 2+ 材料的发光及长余辉特性.首次得到了这一材料的发光衰减由初始的快衰减和后期的慢衰减过程所组成,以及热释发光光谱出现两个热释发光峰值的实验结果.对所得结果进行了分析讨论,提出了这一材料的发光衰减是由两个足够深的电子陷阱所引起. uminescence and long persistence property of SrAl 2 O 4 :Eu 2+ are investigated in the paper.It is analyzed by emission spectra that the Eu 2+ luminescence in the above phosphor is caused by 5d-4f transition.Its luminescence decay follows I = ct -n ,which consists of the initial fast process and the later extremely slow process after 5 minutes.The thermoluminescent spectra of this phosphor consist two peaks.The temperatures of peak value are 117℃ and 155℃ respectively,this means the electron traps of phosphors are very deep,which can cause the extremely long persistence of SrAl 2 O 4 :Eu 2+ . SrAl 2 O 4 ：Eu 2+ 发光衰减 热释发光光谱 电子陷阱 SrAl 2 O 4 ：Eu 2+ luminescence decay thermoluminescent spectra electron trap 国家自然科学基金 1994-07-12 1995-02-28 2020-08-11 1 16