能量阶梯传递提高铽、铕共掺杂氧化锡薄膜敏化发光性能的研究  

Enhancing sensitized luminescence in europium-doped tin-oxide films via cascade energy transfer by terbium co-dopants

作　　者：刘志远 徐凌波 崔灿[1] LIU Zhiyuan;XU Lingbo;CUI Can(School of Science,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学理学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2022年第5期696-704,共9页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(61704154);浙江省自然科学基金项目(LY20F040006)。

摘　　要：不同稀土离子掺杂氧化锡薄膜展现出迥异的敏化发光性能,因此探究氧化锡(SnO_(2))与稀土离子之间的能量传递过程对制备宽光谱发光薄膜具有重要意义。通过溶液旋涂法,利用二水合氯化亚锡、六水合氯化铽以及六水合氯化铕制备出铽、铕共掺氧化锡(SnO_(2):1%Eu^(3+)/x%Tb^(3+)(x=0,0.1,0.5,1.0))薄膜,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见吸收光谱(UV-Vis)、光致发光谱(PL)、光致发光激发谱(PLE)、时间分辨光致发光衰减谱(TRPL)等对薄膜的结构形貌和光学性能进行表征。结果表明:单纯铕离子(Eu^(3+))掺杂的SnO_(2)薄膜敏化发光性能不佳,通过共掺杂铽离子(Tb^(3+))可以实现能量的阶梯传递,提高Eu^(3+)离子的敏化发光强度;随着Tb^(3+)离子掺杂浓度的提高,Eu^(3+)离子的发光呈现出先增强后减弱的趋势,Tb^(3+)离子的浓度为0.5at.%时Eu^(3+)离子的发光性能最好,比未共掺杂的样品高约3倍。本文结果为制备高效的稀土掺杂氧化锡发光材料提供了新的思路。Different rare earth ions doped tin oxide(SnO_(2))films show different sensitized luminescence properties.Therefore,it is of great significance to explore the energy transfer process between SnO_(2)and rare earth ions to realize wide spectrum luminescence films.Terbium and europium co-doped tin-oxide(SnO_(2):1%Eu^(3+)/x%Tb^(3+)(x=0,0.1,0.5,1.0))films were prepared by spin coating method with stannous chloride dihydrate,terbium chloride hexahydrate and europium chloride hexahydrate.The structure,morphology and luminescent properties of the films were characterized and analyzed by X-ray diffraction(XRD),scanning electron microscope(SEM),UV Vis,fluorescence spectrometer(PL)and photoluminescence excitation(PLE).The results show that the sensitized luminescence performance of SnO_(2)thin films doped with simple europium ion(Eu^(3+))is poor.The cascade energy transfer can be realized and the sensitized luminescence intensity of Eu^(3+)ion can be improved by co-doping terbium ion(Tb^(3+)).With the increase of Tb^(3+)ion doping concentration,the luminescence of Eu^(3+)ions first increases and then decreases.When the concentration of Tb^(3+)ion is 0.5at.%,the luminescence performance of Eu^(3+)ions is the best,which is about three times higher than samples without co-doping.The results provide a new idea for the preparation of efficient rare earth doped tin-oxide luminescent materials.

关 键 词：铕离子 铽离子 氧化锡 敏化发光 能量阶梯传递 

分 类 号：TB381[一般工业技术—材料科学与工程] O482.3[理学—固体物理]