(La,Gd)PO_4∶Pr^(3+)荧光材料的制备及上转换发光性能的研究  

Research on synthesis and upconversion luminescence property of (La,Gd)PO_4∶Pr^(3+) flourescent material

作　　者：王雅静[1] 李娟娟[1] 史忠祥 魏蕾[1] 肖林久[1] 谢颖[1] 

机构地区：[1]沈阳化工大学应用化学学院,沈阳110142

出　　处：《化工新型材料》2016年第11期140-142,共3页New Chemical Materials

基　　金：辽宁省教育厅资助项目(L2013166)

摘　　要：用水热法制备了(La_(1-x),Gd_x)PO_4∶Pr^(3+)荧光材料。用X射线粉末衍射(XRD)确定该荧光材料为单斜晶系,用荧光光谱探究了Pr^(3+)浓度及Gd^(3+)掺杂量对上转换发光效果的影响。结果表明,随着Pr^(3+)浓度的增加发光强度先增强后减弱,Pr^(3+)浓度为0.9%时,发光强度最大,达到2400cd。且掺杂适量的Gd^(3+)使发光效果增强,当Gd^(3+)掺杂量为50%(wt,质量分数)时,上转换发光性能最好,达到3600cd。在828nm近红外光激发下,可以观察到Pr^(3+)590nm处的橙黄光发射峰,来自于Pr^(3+)的~3P1→~3H_6跃迁;以及在476nm和491nm处的蓝光发射峰(Pr^(3+)的~3P_0→~3H_4和~3P_1→~3H_4的跃迁产生)。Trivalent praseodymium ions doped （La1-x ,Gd.）PO4 flourescent materials were prepared by hydrother mal method. X-ray diffraction （XRD） were used to determine the monoclinic system of prepared materials. Fluorescence spectrum was applied to study the effect of Pr3＋ concentration and Gda＋ doping amount. The experimental results indicated that with the increase of concentration of Pr3＋ ,phosphor luminous intensity enhanced at first and then decreased. When the Pr3＋ concentration was 0.9%, the luminous intensity was the biggest, it was 2400cd. The glowing effect was enhanced when the introduction of optimal Gd3＋. While the Gd3＋ doping amount was 50%, the upconversion luminous performance was the best,it was 3600cd. The 590nm orange emission peak from the transition of 3p1→3H6 of Pr3＋ and the 476nm and 491nm blue emission peak （the transition of aP0→3H4 and 3P1→3H, of Pr3＋ ）can be observed at 828nm near infrared excitation.

关 键 词：水热法 上转换 (La Gd)PO4∶Pr3+ 近红外光 

分 类 号：TQ422[化学工程]