节点文献

铁杂质在Eu²⁺,Dy³⁺激活的铝酸锶发光粉中发光猝灭研究

Luminescence quenching by iron impurity in Eu²⁺,Dy³⁺ doped strontium aluminates

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 YANG Xue-feng1,NING Gui-ling1,2,LI Yan-feng1,YU Jing-jie1,PAN Wen1,LIU Hong-yu1(1.State Key Lab.of Fine Chem.,Dalian Univ.of Technol.,Dalian 116012,China;2.Key Lab.for Micro/Nano Technol.and Syst.of Liaoning Prov.,Dalian Univ.of Technol.,Dalian 116012,China)

【机构】大连理工大学精细化工国家重点实验室；大连理工大学精细化工国家重点实验室辽宁大连116012；辽宁大连116012；大连理工大学辽宁省微纳米技术及系统重点实验室；

【摘要】利用纳米包覆技术制备了掺杂不同含铁量的发光粉SrAl2O4:Eu,Dy,通过X射线衍射、发射光谱和余辉曲线等测试手段研究了铁杂质对发光粉的晶体结构以及发光性能的影响.结果表明微量铁的存在没有引起发光粉的晶相结构变化,但降低了发光强度.随着铁含量从0.001 mol增加到0.01 mol,余辉平均发光强度下降了50%,这种变化是由于Fe3+—O2-中心将一部分能量传递到红外区域引起的,同时首次发现了铁在铝酸锶晶体中的红外发光现象.更多还原

【Abstract】 The long afterglow phosphors SrAl2O4: Eu,Dy with different iron content have been prepared by nano-alumina coating process.The effect of crystal structure and luminescence properties of the phosphors by iron is investigated by XRD, luminescence spectra and afterglow curve.It is found that its crystal structure has no change,but luminescence properties have been quenched due to the existence of iron. By changing the iron content from 0.001 mol to 0.01 mol,the average luminescence intensity is decreased by 50%,which may be due to the Fe3+—O2energy transfer to infrared site.Simultaneously,the infrared luminescence in strontium aluminates by iron is observed for the first time.更多还原