摘要
以Eu(NO3)3·6H2O为铕源,采用溶胶-凝胶法制备了TiO_(2)∶Eu^(3+)荧光粉,研究了Eu^(3+)离子掺杂量对TiO_(2)基质物相、发光性能的影响,进一步探讨了TiO_(2)基质与Eu^(3+)离子的能量传递机理,利用X射线衍射(XRD)、荧光光谱、荧光寿命衰减曲线进行表征。结果表明:样品为锐钛矿结构,在395nm、465nm波长激发下,发射主峰在615nm处,与Eu^(3+)的^(5)D_(0)→^(7)F_(2)电偶极跃迁相对应,可用于红光荧光粉。TiO_(2)基质到Eu^(3+)离子的能量传递可通过氧空位缺陷作为能量捕获中心实现能量转移,增强Eu^(3+)离子的发光。所制备的TiO_(2)∶Eu^(3+)荧光粉可用于硅太阳能电池。
TiO_(2)∶Eu^(3+)phosphors were prepared by sol-gel method with Eu(NO3)3·6H2O as the source.The effect of Eu^(3+)ion doping amount on the phase and luminescence properties of TiO_(2)matrix was studied.The TiO_(2)matrix was further discussed.The energy transfer mechanism of Eu^(3+)ions was characterized by X-ray diffraction(XRD),fluorescence spectra,and fluorescence lifetime decay curves.The results shown that the sample was anatase.Under the excitation of 395nm and 465nm,the main emission peak was at 615nm,which corresponded to the^(5)D_(0)→^(7)F_(2)electric dipole transition of Eu^(3+),which can be used for red phosphor.The energy transfer from the TiO_(2)matrix to the Eu^(3+)ions can achieve energy transfer through oxygen vacancy defects as an energy capture center,enhancing the luminescence of Eu^(3+)ions.The prepared TiO_(2)∶Eu^(3+)phosphor can be used for a silicon solar cell.
作者
郭建
肖林久
李文泽
李巧云
Guo Jian;Xiao Linjiu;Li Wenze;Li Qiaoyun(School of Applied Chemistry,Shenyang University of Chemical Technology,Shenyang 110004)
出处
《化工新型材料》
CAS
CSCD
北大核心
2021年第1期131-134,共4页
New Chemical Materials
基金
辽宁省教育厅基金项目(2009S01)。
