The NaGd(WO4)2:Eu3+ phosphors were prepared by the microemulsion mediated hydrothermal method. The morphology and size of the samples could be dependent on the pH in the initial solution. These phosphors obtained had ...The NaGd(WO4)2:Eu3+ phosphors were prepared by the microemulsion mediated hydrothermal method. The morphology and size of the samples could be dependent on the pH in the initial solution. These phosphors obtained had a strong absorption at 395 nm matching with the popular emission of near-UV LED chips, and could emit intense red light at 616 nm. The small ellipsoid-like particles or short rods were provided with large parameters of oscillator strength?2 and asymmetry ratio. Compared to the ellip-soid-like phosphors, the rod-like phosphors took on stronger emission, longer lifetime and larger quantum efficiency. This work demonstrated that the one-dimension NaGd(WO4)2:Eu3+ phosphors might be a more favorable device than zero-dimension ones for photoluminescence.展开更多
基金supported by the National Natural Science Foundation of China(61565006,61204003,51563009 and 11547229)Train Object Program of Jiangxi Province Young Scientists,Natural Science Foundation of Jiangxi Province(2011BAB206029,20142BAB216011,2015BAB213015)the Excellent Young Academic Talent Program of Jiangxi University of Finance and Economics
文摘The NaGd(WO4)2:Eu3+ phosphors were prepared by the microemulsion mediated hydrothermal method. The morphology and size of the samples could be dependent on the pH in the initial solution. These phosphors obtained had a strong absorption at 395 nm matching with the popular emission of near-UV LED chips, and could emit intense red light at 616 nm. The small ellipsoid-like particles or short rods were provided with large parameters of oscillator strength?2 and asymmetry ratio. Compared to the ellip-soid-like phosphors, the rod-like phosphors took on stronger emission, longer lifetime and larger quantum efficiency. This work demonstrated that the one-dimension NaGd(WO4)2:Eu3+ phosphors might be a more favorable device than zero-dimension ones for photoluminescence.
