摘要
采用高温固相法制备了基质掺杂的(Y,Rn)_2O_2S∶Sm^(3+),Ti^(4+),Mg^(2+)(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.
Host doped （Y, Rn）2O2S： Sm^3＋, Ti^4＋ , Mg^2＋ （Rn = La, Gd, Lu, Ga, A1） 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→^6HT/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 longlasting property. When the doped ion is a little smaller than Y^3＋, 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 Y^3＋, it will shorten the long-lasting time. The presumable mechanism was also discussed.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2008年第1期49-52,共4页
Journal of University of Science and Technology Beijing
基金
北京科技大学校基金资助项目(No.00009003)
