CAJ | 학술논문

采用不同于传统固相反应法的制备方法合成了Fe,Ce 共掺杂γ-LiAlO2.通过XRD和 SEM分析表明,采用这种方法能够成功获得尺寸小于10 μm的四方相结构γ-LiAlO2荧光粉.从γ-LiAlO2∶Fe,Ce 的激发和发射光谱可以看出,通过引入少量的铈离子,我们首先发现了铈离子掺杂对样品的发光效率有明显的影响.并且随着铈离子浓度的增加,其发光效率也出现规律性的变化,而且发射光谱在Ce离子摩尔分数达到1.5%的情况下发光效率最强,当Ce离子摩尔分数达到3%时,发光效率明显下降.这种高效的荧光粉作为转光剂应用于人工植物照明和农用转光膜具有积极的意义.
채용불동우전통고상반응법적제비방법합성료Fe,Ce 공참잡γ-LiAlO2.통과XRD화 SEM분석표명,채용저충방법능구성공획득척촌소우10 μm적사방상결구γ-LiAlO2형광분.종γ-LiAlO2∶Fe,Ce 적격발화발사광보가이간출,통과인입소량적시리자,아문수선발현료시리자참잡대양품적발광효솔유명현적영향.병차수착시리자농도적증가,기발광효솔야출현규률성적변화,이차발사광보재Ce리자마이분수체도1.5%적정황하발광효솔최강,당Ce리자마이분수체도3%시,발광효솔명현하강.저충고효적형광분작위전광제응용우인공식물조명화농용전광막구유적겁적의의.
Fe3+,Ce3+ co-doped LiAlO2 samples were successfully prepared by solid-state reaction method.The XRD and the SEM results showed that tetragonal γ-LiAlO2 with diameter less than 10 μm was obtained.It was found firstly that the luminescence intensity of γ-LiAlO2∶Fe3+ is enhanced greatly by introducing a small amount of Ce3+ ions.The Ce3+ plays a role as sensitizer in host lattice,resulting in the enhancement of deep red emission of Fe3+ ions.The improved phosphor might be widely applied to agricultural film and fluorescent lamps relating to plant growth.