中文摘要：

采用高温固相法在800℃下制备出系列白色长余辉荧光粉Sr3Al2O5Cl2∶Eu^2＋,Tm^3＋,并研究了它们的结构、形貌及发光性能。样品Sr2.91Al2O5Cl2∶0.04Eu^2＋,0.05 Tm^3＋具有单一晶相和纳米纤维结构。该样品在紫外光激发下表现出两个很强的宽带发射（分别位于^448 nm和^590 nm）。它的余辉寿命大约是20 min。利用此种荧光粉所制作出的白光LED器件表现出很强的白光发射。

英文摘要：

White long persistent phosphors, Sr3Al2O5Cl2： Eu2＋ ,Tm3＋ , have been successfully prepared by the solid state reaction at 800 ℃. The as-prepared sample Sr2.91Al2O5Cl2：0.04Eu2＋ , 0.05 Tm3＋ shares single phase and regular nano-fi- her morphology. This sample exhibits two broad emission bands located at - 448 nm and - 590 nm, respectively, and its white persistent duration is about 20 min （ 〉 0.35 mcd/m2 ）. At last, intense white light can be found from the white light-emitting diode with Sr2.91Al2 O5 Cl2： 0.04Eu2 ＋ , 0. 05 Tm3 ＋.