作　　者： ; ; ; ; ; ;

机构地区： 暨南大学

出　　处： 《稀有金属材料与工程》 2006年第5期766-769,共4页

摘　　要： 利用高温固相法合成了一种长余辉发光材料Gd2O2S:Ti,利用XRD测试了其结构并测试了其在紫外光激发下的发光特性;停止照射,有橙色的余辉,时间接近2h。分析该磷光体的发光和余辉产生细节,认为空穴和电子的复合导致Ti3+的2E→2T2的跃迁是产生发光和余辉的原因;并根据缺陷和空位对Gd2O2S:Ti的余辉机理进行探讨,提出了余辉机理模型。 A new phosphor Gd2O2S：Ti was synthesized by a traditional solid-state reaction method. The luminescent properties and thermo-luminescence curves were investigated. An orange afterglow was observed in the Gd2O2S：Ti excited by UV light with a persistent time of about 2 h according to the light perception of dark-adapted human eyes. The mechanism of the afterglow has been discussed and analyzed by the thermo-luminescence spectra. We conclude that the transition ^2E→^2T2 of Ti^3＋ metastable state is the reason of luminescence and afterglow, and give a new afterglow mechanism of this kind of phosphor.

关 键 词： 长余辉 热释光谱

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]