用高温固相法在还原气氛中制备了SrAl2O4:Eu2+,Dy3+长余辉发光材料,测得了其晶体结构、激发光谱和发射光谱.在所知的最佳激发条件下,给材料以一定的辐照剂量后,测得了不同基质浓度、不同稀土掺杂浓度时的热释光谱,并计算了相应的陷阱能级深度.结合不同样品的余辉衰减曲线和热释光曲线进行分析,发现Dy+掺入量的变化对材料的余辉性能影响很大,而作为基质的铝离子,其浓度在一定范围内的变化对材料的余辉性能影响不大.这与Matsuzawa等人所提出的该材料的余辉机理模型相符.
[1] 刘震, 杨志平. 铝酸锶铕镝长余辉材料研究 [J]. 河北大学学报(自然科学版) 2001.doi:10.3969/j.issn.1000-1565.2001.04.026
[2] 陈一诚, 陈登铭, 詹益松. 杂质的添加对SrAl2O4∶Eu2+, Dy3+余辉发光特性的改善 [J]. 中国稀土学报 2001.doi:10.3321/j.issn:1000-4343.2001.06.005
[3] 李成宇, 王淑彬, 于英宁, 苏锵. Eu2+, Dy3+共掺杂硼铝锶长余辉玻璃陶瓷 [J]. 发光学报 2002.doi:10.3321/j.issn:1000-7032.2002.03.004
[4] PALILLA F C, ALBERRE A K, TOMKUS M R. Fluorescence properties of SrAl2O4 :Eu sputtered films with long phosphorescence [J]. Journal of the Electrochemical Society 1968, 115(06).
[5] Katsumata T., Sasajima K., Matsuzawa T., Nabae T.. Growth and characteristics of long persistent SrAl2O4- and CaAl2O4-based phosphor crystals by a floating zone technique [J]. Journal of Crystal Growth 1998, 3(3).
[6] JIA W, YUAN H, HOLMSTROM S. Photo-stimulated-luminescence in SrAl2O4:Eu2+, Dy3+ single crystal fibers [J]. Journal of Luminescence 1999.
[7] Ito S, BANNO S, Suzuki K. Phase transitions in SrAl2O4 [J]. Zeitschrift für Physikalische Chemie 1977, 105.
[8] Matsuzawa T., Takeuchi N., Murayama Y., Aoki Y.. NEW LONG PHOSPHORESCENT PHOSPHOR WITH HIGH BRIGHTNESS, SRAL2O4-EU2+, DY3+ [J]. Journal of the Electrochemical Society 1996, 8(8).
[9] Reuven Chen. Glow curves with general order kinetics [J]. Journal of the Electrochemical Society:Solid state science and Technology 1969, 116(09).
[10] YUANHUA LIN, ZILONG TANG, ZHONGTAI ZHANG. Influence of co-doping different rare earth ions on the luminescence of CaAl2O4-based phosphors [J]. Journal of the European Ceramic Society 2003, 23.
