【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。更多还原

【Abstract】 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 Ti3+ metastable state is the reason of luminescence and afterglow,and give a new afterglow mechanism of this kind of phosphor.更多还原