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中文摘要：
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Ti^3＋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。
英文摘要：
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.
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