Co-Precipitation Synthesis and Photoluminescence Properties of Sc0.88Lu0.05(V1-xPx)O4∶Eu3+0.07 Red Phosphor for White Light Emitting Diodes
Sc0.88Lu0.05(V1-xPx)O4∶Eu3+0.07(0<≤x≤<0.5) phosphors were synthesized by co-precipitation method.The structure, morphology and luminescence spectra of samples were investigated by XRD, SEM and fluorescence spectrophotometer, respectively.The samples doped with Eu3+, Lu3+ and PO43-can maintain the body-centered tetragonal structure of ScVO4 and the morphology essentially remains unchanged with slight agglomeration.The excitation spectrum intensity of Sc0.88Lu0.05(V1-xPx)O4:Eu3+0.07 increase within the near UV excitation(360-410nm).The optimum doping concentration of PO43-is 0.2(x value), and the maximum emission intensity of Sc0.88Lu0.05(V0.8P0.2)O4∶Eu3+0.07 is about 35 % higher than the Sc0.88Lu0.0sVO4∶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 PO43-doping concentration.The internal quantum efficiency is up to 66.73% under 365nm excitation, When the temperature rises to 200℃, the emission intensity maintains 79.3% of that in the room temperature.Sc0.88Lu0.05(V0.8P0.2)O4:Eu3+0.07 phosphor shows high internal quantum efficiency and thermal stability, which is suitable for the UV-pumped white LED as red phosphor.
White LED Co-precipitation Red phosphor Luminescence
Di WU Xin-Yu Ye Xin-Hua Yang Fan Liu Jian-Wen Zhao Fan Yang
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 Institut National de la Recherche Scientifique-(E)nergie, Matériaux et Télécommunications,Université
国际会议
银川
英文
87-95
2017-08-16（万方平台首次上网日期，不代表论文的发表时间）