Eu^(3+)和Yb^(3+)掺杂的近红外发光材料的制备及荧光性能  

Preparation and Spectroscopic Characterization of Eu^(3+) and Yb^(3+) Near Infrared Luminescent Material

作　　者：闫凤巧[1] 尹建波[1] 顾明广[1] 张小博[1] YAN Fengqiao;YIN Jianbo;GU Mingguang;ZHANG Xiaobo(School of Chemical and Material Engineering,Yanching Institute of Technology,Langfang 065201,China)

机构地区：[1]燕京理工学院化工与材料工程学院,河北廊坊065201

出　　处：《信阳师范学院学报（自然科学版）》2018年第2期268-271,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：河北省高等学校科学研究计划项目(ZC2016167)

摘　　要：采用溶胶-凝胶法制备了系列近红外发光材料Y_(1.98-x)Yb_xEu_(0.02)O_3(其中x=0,0.01,0.02,0.04,0.06,0.10),并采用X射线衍射仪(XRD)、荧光光谱(PL)等测试方法、技术对样品的物相结构和发光特性进行了表征及测试.结果表明:Eu^(3+)和Yb^(3+)掺杂的荧光粉中,Eu^(3+)和Yb^(3+)部分取代了Y^(3+),并占据其晶格位置,而对Y_2O_3的立方相晶体结构未产生显著影响;在466 nm波长(Eu^(3+)的特征激发峰)激发下,在可见光区及近红外光区可观察到较强的发射光谱,其中,Y_(1.94)Yb_(0.04)^(3+)Eu_(0.02)^(3+)O_3在近红外光区发光效率最高.采用溶胶-凝胶法制备出Eu^(3+)和Yb^(3+)掺杂的新型荧光材料,可将硅太阳能电池吸收较弱的高能光子转换成吸收较好的近红外光子,可有效解决太阳光谱与硅太阳能电池光电响应之间存在的光谱失配问题.The near Infrared luminescent materials of Y 1.98-x Yb x Eu 0.02O3(where x=0,0.01,0.02,0.04,0.06,0.10)were prepared through a facile,in-expensive pathway of sol-gel method,and the resultant samples were characterized and analyzed using X-ray diffraction(XRD)and fluorescence spectroscopy(PL).The results of X-ray diffraction indicated that the incorporation of ions of Eu 3+and Yb 3+only partially replaced the lattice sites of Y 3+without the change of the former cubic crystal structure of Y2O3.Under the chosen laser(466nm,the characteristic excitation wavelength of Eu3+)irradiation,the emission light of visible light emission and near-infrared from the resultant samples could be observed,where the samples of Y 1.94 Yb 3+0.04 Eu3+0.02O3 showed the higher luminous efficiency in the near infrared spectrum.The ions of Eu 3+and Yb 3+doped near infrared luminescent material were successfully prepared using sol-gel method,and the structure and luminous performance were systematically characterized.The resultant sample could efficiently convert high energy photons into NIR photon benefiting the improvement of the photoelectric conversion efficiency of the Si-solar cell.Thus,the problem of spectrum mismatch between solar spectrum and photoelectric response of silicon solar cells could be solved,and the novel near infrared luminous materials owned the promising prospect and broad application in the design and fabrication of novel high efficiency silicon solar cells.

关 键 词：近红外 吸收光谱 发射光谱 发光材料 能量传递 

分 类 号：O482.31[理学—固体物理]