稀土离子掺杂碲酸盐发光薄膜的制备及其荧光增强  

UPCONVERSION LUMINESCENCE OF RARE EARTH IONS DOPED TELLURITE FILMS AND THE FLUORESCENCE ENHANCEMENT

作　　者：冯昭彬[1] 林健[1,2] 魏恒勇[1] 黄文旵[1] 隋鑫[1] 李东卫[1] 孙天拓[1] 

机构地区：[1]同济大学材料科学与工程学院,上海200092 [2]同济大学,先进土木工程材料教育部重点实验室,上海200092

出　　处：《硅酸盐学报》2010年第11期2059-2064,共6页Journal of The Chinese Ceramic Society

基　　金：上海市科学技术委员会纳米专项基金(0852nm06500)资助项目

摘　　要：利用直流电场辅助固态膜离子交换技术,将金属银引入硅酸盐玻璃基片中,制备了表层含银纳米颗粒的改性硅酸盐玻璃基片。以1,2-丙二醇碲和硝酸锌、硝酸铒、硝酸镱为原料,通过非水解溶胶-凝胶法制备稀土离子掺杂的碲酸盐发光薄膜材料。利用X射线衍射、透射电镜、差热分析、场发射扫描电镜、原子力显微镜、荧光光谱仪、立体显微镜等测试手段,研究了玻璃基片中的银纳米颗粒及其形貌、薄膜的物相、形貌、发光性能及改性基片的荧光增强效应。结果表明:改性硅酸盐玻璃基片表层含有粒径为10～20nm的银纳米颗粒;制备的Er^(3+)-Yb^(3+)掺杂的碲酸盐发光薄膜为无定形态,薄膜的微观形貌良好,厚度约200nm;在改性玻璃基片上制备的薄膜在980nm激光泵浦下,可在410,527,547,660nm和1540nm附近发射荧光,其发光强度显著提高,最大可提高180倍。Metallic silver was induced into silicate substrate by direct current electric field-assisted ion diffusion process of solid-state film.Ag nano-particles embedded silicate substrates were fabricated.Rare earth ions doped tellurite film was prepared by tellurium （Ⅳ） 1,2-propylene diglycollate（Te（O_2C_3H_6）_2）,zinc nitrate,erbium nitrate（Ⅲ） and ytterbium nitrate（Ⅲ） via non-hydrolytic sol-gel process.By means of X-ray diffraction,transmission electron microscopy,differential thermal analysis,field emission scanning electron microscope,atomic force microscope,fluorescence spectrometer and stereo microscope,Ag nano-particles and its morphology in glass substrate,the phase,morphology and fluorescence properties of the film,fluorescence enhancement effect were studied.The results show that Ag nano-particles with the diameter of 10-20nm embedded silicate substrate is fabricated.Er^（3＋）-Yb^（3＋） doped tellurite thin films with the thickness of 200 nm is amorphous and uniform.The film shows emissions at 410,527,547,660,1540 nm when excited by 980 nm laser.The fluorescence emission intensity is greatly improved when the film is coated on modified substrate.The enhancement factor is up to 180 times at most.

关 键 词：碲酸盐薄膜 荧光 增强 溶胶-凝胶法 稀土离子 

分 类 号：TQ171.1[化学工程—玻璃工业]