Abstract:The preparation of Eu-doped YAG nano-phosphors via the novel synthesis process based on the polyacrylamide gel method was introduced, then the samples were characterized by thermo-gravimetric analysis, differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, the excitation or emission spectroscopy. It is found that the forming temperature of Eu∶YAG nano-phosphor can be as low as 900℃, which is 700℃ lower than that of the solid-state method; Eu∶YAG nano-phosphors is of coral shape and the particle size ranges from 100 to 150nm; the photoluminescence spectrum of the Eu∶YAG nano-phosphors exhibits the strongest emission peak at 594nm, the emission intensity of which increases steadily with increasing Eu3+ concentration from 1 at.% to 5 at.%. Fluorescence quenching effect was observed with further increasing the concentration of Eu3+ from 6 at.% to 8 at.%, and also the probable mechanism of this phenomenon is discussed.
