Nanoparticles of red long afterglow phosphor Sr3Al2O6: Eu2+ were prepared by microwave irradiation method at a power of 680 W and a processing time of 15 min. The phosphors nanoparticles were characterized by X-ray di...Nanoparticles of red long afterglow phosphor Sr3Al2O6: Eu2+ were prepared by microwave irradiation method at a power of 680 W and a processing time of 15 min. The phosphors nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fluorescence spectrophotometer techniques. The results reveal that the samples are composed of single Sr3Al2O6 phase. The resultant nanoparticles show small size (80?100 nm) and spherical shape. The excitation and emission spectra indicate that excitation broad band chiefly lies in visible range and the nanoparticles emit much strong light at 612 nm under around 473 nm excitation. And the long afterglow phosphorescence of Sr3Al2O6 doped with Eu2+ was observed in the dark with naked eye after the removal of the excitation light. The effect of Eu2+ doping concentrations of the samples on the emission intensity is studied systematically. Furthermore, the microwave method requires a very short heating-time and the energy consumption.展开更多
研究了柠檬酸对高温固相法合成的Y2O2S:Eu3+,Mg2+,Ti4+红色长余辉材料性能的影响,结果表明添加一定量的柠檬酸有利于提高Y2O2S:Eu3+,Mg2+,Ti4+的发光性能,其初始亮度为1800 m cd/m2,余辉时间为8 h.采用X射线衍射(XRD)、扫描电镜(SEM)、...研究了柠檬酸对高温固相法合成的Y2O2S:Eu3+,Mg2+,Ti4+红色长余辉材料性能的影响,结果表明添加一定量的柠檬酸有利于提高Y2O2S:Eu3+,Mg2+,Ti4+的发光性能,其初始亮度为1800 m cd/m2,余辉时间为8 h.采用X射线衍射(XRD)、扫描电镜(SEM)、荧光光谱(PL)对样品进行了表征.展开更多
基金Project (50072014) supported by the National Natural Science Foundation of China
文摘Nanoparticles of red long afterglow phosphor Sr3Al2O6: Eu2+ were prepared by microwave irradiation method at a power of 680 W and a processing time of 15 min. The phosphors nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fluorescence spectrophotometer techniques. The results reveal that the samples are composed of single Sr3Al2O6 phase. The resultant nanoparticles show small size (80?100 nm) and spherical shape. The excitation and emission spectra indicate that excitation broad band chiefly lies in visible range and the nanoparticles emit much strong light at 612 nm under around 473 nm excitation. And the long afterglow phosphorescence of Sr3Al2O6 doped with Eu2+ was observed in the dark with naked eye after the removal of the excitation light. The effect of Eu2+ doping concentrations of the samples on the emission intensity is studied systematically. Furthermore, the microwave method requires a very short heating-time and the energy consumption.
文摘研究了柠檬酸对高温固相法合成的Y2O2S:Eu3+,Mg2+,Ti4+红色长余辉材料性能的影响,结果表明添加一定量的柠檬酸有利于提高Y2O2S:Eu3+,Mg2+,Ti4+的发光性能,其初始亮度为1800 m cd/m2,余辉时间为8 h.采用X射线衍射(XRD)、扫描电镜(SEM)、荧光光谱(PL)对样品进行了表征.
