Synthesis and Photoluminescence Properties of Sc0.88-xLu0.05VO4∶Eu3+0.07, Bi3+x Red Phosphor

摘要：

　　Sc0.88-xLu0.05VO4∶Eu3+0.07,Bi3+x(0≤x≤0.05) red phosphors were synthesized by solid state reaction at 1200℃ for 3h.The structure, morphology and luminescence spectra of samples are investigated by X-ray diffraction (XRD), Scanning electron microscope (SEM) and fluorescence spectrophotometer, respectively.The samples doped with Eu3+, Lu3+ and Bi3+ maintain the body-centered tetragonal structure of ScVO4 and the morphology remains essentially unchanged with slight agglomeration.The excitation spectrum of Sc0.88-xLu0.05VO4∶Eu3+0.07,Bi3+x emerged redshift and the excitation intensity increase within the near UV excitation(360-400nm).The optimum doping concentration of Bi3+ is 0.02(x value), and the maximum emission intensity of Sc0.86Lu0.05VO4∶Eu3+0.07,Bi3+0.02 is higher than 88 % in comparison with Sc0.88Lu0.05VO4∶Eu3+0.07 under 365 nm excitation.Decay curve of 5D0 state for as-prepared samples fits the single order exponential behavior, the lifetime of 5D0 increase first and then decrease with the increase of Bi3+ doping concentration.The internal quantum efficiency is up to 74.08% under 365nm excitation; When the temperature raises to 200℃, the emission intensity maintains 79% of that in the room temperature.Sc0.86Lu0.05VO4∶Eu3+0.07,Bi3+0.02 phosphor show high internal quantum efficiency and thermal stability, which is suitable for the UV-pumped white LED as red phosphor.

关键词： White LED Red phosphor Solid state re action Luminescence

作者: Di Wu Xin-yu Ye Xin-hua Yang Jian Zhou Xiao-qiang Wen Shi-yong Xie Yang Luo

作者单位: National Engineering Research Center for Ionic Rare Earth, Ganzhou 341000, China;Ganzhou Nonferrous National Engineering Research Center for Ionic Rare Earth, Ganzhou 341000, China;School of Metallurg School of Metallurgy and Chemistry Engineering, Jiangxi University of Science and Technology, Ganzho

会议类型: 国际会议

会议名称: The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)

会议地点: 重庆

会议语种:英文

页码: 604-611

在线出版日期: 2016-07-25（万方平台首次上网日期，不代表论文的发表时间）