采用高温固相法在800 ℃下制备出系列白色长余辉荧光粉Sr3Al2O5Cl2∶Eu2+, Tm3+, 并研究了它们的结构、形貌及发光性能。样品Sr2.91Al2O5Cl2∶0.04Eu2+, 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。

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 Tm 3+ shares single phase and regular nano-fiber 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 Sr2.91Al2O5Cl2∶0.04Eu2+, 0.05 Tm 3+.