摘要
采用溶胶-凝胶法(Sol-gel)合成La_2Ce_2O_7:Eu^(3+)系列红色荧光粉,并研究煅烧温度、Eu^(3+) 掺杂浓度以及不同种类电荷补偿剂对样品发光性能的影响.通过XRD、SEM、荧光光谱对样品的晶体结构、形貌以及发光性能进行测量和表征.结果表明:实验所得样品主晶相为La_2Ce_2O_7,属于萤石结构.Eu^(3+) 及电荷补偿剂的掺杂没有改变其晶体结构.合成的样品在467 nm蓝光激发下发出612 nm的红光.样品的发光强度随煅烧温度以及Eu^(3+) 掺杂浓度的提高先增强后减弱,样品的较优的煅烧温度为1 100℃,Eu^(3+) 较优的掺杂浓度为10%(摩尔百分比).掺入电荷补偿剂可以有效增强样品的发光强度,其中掺入Li+后发光增强的效果最显著.
Red phosphorsof the La2Ce2O7:Eu3+were synthesized by sol-gel method.The effects of calcination temperature,Eu3+doping concentration and different kinds of charge compensations on the luminescent properties were also studied in this paper.The crystal structure,surface morphology and luminescent properties of the samples were measured and characterized by XRD,SEM,and fluorescence spectrum.The results show that the main crystal phase of samples is La2Ce2O7,which is single-phased fluorite structure.Its crystal structure has not been changed by Eu3+ion and charge compensations.Under the blue light excitation of467nm,the characteristic red emission at612nm is detected.The emission intensity increases and then decreases with the increasing of the sintering temperature and Eu3+ion concentration.The optimum sintering temperature and Eu3+ion concentrationare1100℃and10mol%,respectively.The emission intensity could be enhanced efficiently by doping charge compensations and the best luminescent performance could be derived when the sample is co-doped with Li+ion.
作者
李嘉鹏
吴有福生
胡美兰
肖青辉
赖凤琴
楚少生
游维雄
LI Jiapeng;WU Youfusheng;HU Meilan;XIAO Qinghui;LAI Fengqin;CHU Shaosheng;YOU Weixiong(School of Material Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)
出处
《有色金属科学与工程》
CAS
2017年第5期83-88,共6页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(11464017)
