发光学报2013，Vol.34Issue(8)：1000-1005,6.DOI:10.3788/fgxb20133408.1000
CaMoO4∶Eu3+,Bi3+,Li+红色荧光粉的共沉淀制备与表征
Co-precipitation Synthesis and Characterization of CaMoO4∶ Eu3 +, Bi3 +, Li + Red Phosphor
摘要
Abstract
Ca0.75MoO4∶Eu0.253+,Ca0.75MoO4∶Eu0.25-x3+,Bix3+ and Ca0.5MoO4∶Eu0.25-2x3+,Bix3+,Li0.25+x+ were synthesized by co-precipitation method.The crystal structure,morphology and luminescent properties were measured and studied in detail by X-ray diffraction (XRD),scanning electron microscope (SEM),Raman spectrum,and photoluminescence spectrophotometer (PL).The synthesized red phosphors of CaMoO4 ∶ Eu3+,Bi3+,Li+ are scheelite structure,and the particle sizes are about 0.5 ～ 1 μm.The relative luminous intensity of Ca0.75MoO4∶ Eu0.25-x3+,Bix3+ is significantly higher than Ca0.75MoO4∶Eu0.253+ because Bi3+ ions transmit the absorbed energy to Eu3+ ions.When the doping mole fraction of Bi3+ is 0.005,the relative luminous intensity of 616 nm main emission peak is the largest under the excitation of 395 nm.However,the phenomenon of concentration quenching occurs when Bi3+ doping concentration is higher.In addition,the incorporation of charge compensation can solve the problem of charge imbalance caused by the isomorphous substitution.It is shown that the luminescence property of Ca0.5MoO4∶Eu0.233+,Bi0.013+,Li0.26+ is significantly higher than Ca0.75MoO4∶Eu0.253+,Ca0.5MoO4∶Eu0.253+,Li0.25,and Ca0.75MoO4∶Eu0.243+,Bi0.013+ red phosphors.关键词
白光LED/CaMoO4∶Eu3+,Bi3+,Li+/红色荧光粉/共沉淀法Key words
white LED/ CaMoO4∶Eu3+ , Bi3+ / red phosphor/ co-precipitation method分类
数理科学引用本文复制引用
关荣锋,孙倩,李勤勤,许宁..CaMoO4∶Eu3+,Bi3+,Li+红色荧光粉的共沉淀制备与表征[J].发光学报,2013,34(8):1000-1005,6.基金项目
国家自然科学基金(21276220) （21276220）
江苏省新型环保重点实验室开放基金(AE2011) （AE2011）
河南省基础与前沿技术研究计划(082300440150)资助项目 （082300440150）
