CAJ | 학술논문

通过化学共沉淀法制备了适合近紫外激发的SrZn1- x （WO4）2∶ xTb3＋∶ yCe3＋系列绿色荧光粉。利用X射线衍射（XRD ）分析了不同掺杂比例对样品物相的影响。采用荧光光谱（PL ）对样品的激发光谱和发射光谱进行了表征。分别讨论了稀土T b3＋单掺及C e3＋和 T b3＋共掺对样品发光性能的影响。X RD分析表明：样品的主衍射峰与标准卡片（JCPDS 08-0490和JCPDS 15-0774）的衍射峰基本一致，说明单掺和共掺稀土离子均未改变基质晶格结构。在样品的激发光谱中，223 nm为主激发峰，属于T b3＋的7 F-7 D自旋允许跃迁。在223 nm的紫外光激发下，样品发射光谱主发射峰位置在543 nm ，归属于T b3＋的5 D4→7 F5跃迁。当Ce3＋和T b3＋共掺时，峰型和位置变化不大，Ce3＋和T b3＋掺杂摩尔分数比为0.02∶0.06时，发光强度得到很大提高，说明C e3＋和T b3＋之间存在着能量传递。
통과화학공침정법제비료괄합근자외격발적SrZn1- x （WO4）2∶ xTb3＋∶ yCe3＋계렬록색형광분。이용X사선연사（XRD ）분석료불동참잡비례대양품물상적영향。채용형광광보（PL ）대양품적격발광보화발사광보진행료표정。분별토론료희토T b3＋단참급C e3＋화 T b3＋공참대양품발광성능적영향。X RD분석표명：양품적주연사봉여표준잡편（JCPDS 08-0490화JCPDS 15-0774）적연사봉기본일치，설명단참화공참희토리자균미개변기질정격결구。재양품적격발광보중，223 nm위주격발봉，속우T b3＋적7 F-7 D자선윤허약천。재223 nm적자외광격발하，양품발사광보주발사봉위치재543 nm ，귀속우T b3＋적5 D4→7 F5약천。당Ce3＋화T b3＋공참시，봉형화위치변화불대，Ce3＋화T b3＋참잡마이분수비위0.02∶0.06시，발광강도득도흔대제고，설명C e3＋화T b3＋지간존재착능량전체。
SrZn1 - x (WO4 )2 ∶ xTb3+ , yCe3+ green fluorescent phosphors for near ultraviolet excitation were prepared using chemical co-precipitation .The phases of different doping ratio samples were characterized by the X-ray diffraction (XRD) .The emission spectrum and excitation spectrum of samples were characterized by fluorescence spectroscopy (PL) .The luminescence properties of the rare-earth Tb3+ ion doped and Ce3+ and Tb3+ ion codoped samples were discussed .XRD analysis shows that the main diffraction peaks of samples were consistent with the standard card (JCPDS 08-0490 and the JCPDS 15-0774) of the diffrac-tion peak data .This showed that the doping rare earth ions did not change matrix lattice structure .The excitation spectrum showed that the excitation spectrum peaks at 223 nm which is assigned to the 7F-7D absorption transitions of Tb3+ .The emis-sion spectrum excited by 223 nm exhibits sharp lines peaking at 543 nm which was assigned to the 5 D4 → 7 F5 transitions of the Tb3+ ions .With Tb3+ and Ce3+ co-doping ,the spectrum didn’t change much .The intensity of fluorescence reached the stron-gest when the concentration of Tb3+ ∶Ce3+ arrived at 0.06∶0.02 which may means that there was energy transfer between the ions of Ce3+ and Tb3+ .