高浓度Eu^3＋掺杂钛酸盐薄膜的红光发射  

Red Emission in High Concentration Eu^3＋-dOped Titanate Thin Film

作　　者：李晓娟[1] 王雪影[1] 李长敏[1] 杨殿来[1,2] 林海[1,2] 

机构地区：[1]大连工业大学化工与材料学院,大连116034 [2]大连工业大学无机非金属材料研究所,大连116034

出　　处：《武汉理工大学学报》2007年第E01期106-109,共4页Journal of Wuhan University of Technology

基　　金：本连市科技基金（2004166）资助项目和国家教育部留学回国人员科研启动基金（2005383）.

摘　　要：采用溶胶-凝胶法制备了高浓度Eu^3＋掺杂无定型钛酸盐（KBT）发光薄膜。紫外灯下观察，Eu^3＋掺杂的KBT薄膜发出明亮的红光。通过X射线衍射（XRD）和扫描电镜（SEM）对薄膜的结构和表面形貌进行了分析，利用荧光光谱仪对薄膜的发光性质展开了测试和研究。荧光光谱记录到的Eu^3＋的发射包括4个强峰，其中Eu^3＋的^5D0→^7F2（616nm）超灵敏跃迁最强。激发光谱和三维荧光光谱分析表明，由于Eu-O的电荷迁移带的吸收作用，Eu^3＋掺杂的KBT薄膜在短波紫外区被有效激发，是一种高效紫外-可见光转换材料，为从光-光转换角度提高硅太阳能电池的光能吸收率提供了新思路。High concentration Eu^3＋ -doped amorphous titanate （KBT） luminescence thin film has been successfully fabricated by sol-gel method. The film emits bright red light under the excitation of the UV light. The structure, surface morphology and luminescence properties of the film were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and fluorescence spectrometer. Typical Eu^3＋ emission peaks were observed in the fluorescence spectrum and the strongest emission at about 616 nm with red color corresponds to the ^5D0→^7F2 transition. The analysis of excitation and three-dimensional fluores- cence spectra indicates that the Eu^3＋ -doped KBT thin film can be induced effectively under the excitation of the UV light due to the absorption of the charge transfer band of Eu-O. Eu^3＋ -doped KBT thin film is a kind of high effective ultraviolet-visible light conversion material and provides a new way for increasing the light-electrical efficiency of silica solar cell from light-light conversion angle.

关 键 词：EU^3+ 溶胶-凝胶 发光薄膜 荧光光谱 

分 类 号：O482.31[理学—固体物理] O614.33[理学—物理]