【摘要】 采用高温固相法制备了基质掺杂的（Y,Rn）₂O₂S∶Sm³⁺,Ti⁴⁺,Mg²⁺（Rn=La,Gd,Lu,Ga,Al）红色长余辉材料,主峰均为4G5/2→6H7/2跃迁的红橙色光发射,不受基质掺杂的影响.余辉性能测试表明掺杂离子半径对余辉性能具有重要的影响:单掺时,与Y3+半径相近并略小时样品的余辉时间有正增长;双离子共掺时均为小半径的掺杂对余辉性能有显著的提高,其中之一半径较大时即具有负效应.并对可能存在的机理进行了初步探讨.更多还原

【Abstract】 Host doped(Y,Rn)2O2S∶Sm3+,Ti4+,Mg2+(Rn=La,Gd,Lu,Ga,Al)red phosphors were prepared by solid state method.Their chief emission peaks are in the red-orange range coming from the energy transition of 4G5/2→6H7/2 and host-doping has little effluence on the emitting spectra.Afterglow results show that the semi diameter of doped ions has some effect on the long-lasting property.When the doped ion is a little smaller than Y3+,the afterglow time will increase.When two ions are doped,two smaller ions doping will promote the long-lasting property;if one ion is larger than Y3+,it will shorten the long-lasting time.The presumable mechanism was also discussed.更多还原