Fluoride nanoparticles of Ln3＋（Ln3＋=Pr3＋, Nd3＋, Sm3＋, Cod3＋,Tb3＋ Dy3＋, I-I03＋, Er3＋, Tm3＋, yb3＋）/Eu3＋：LaOF and Eu3＋：LaOF with rhombohedral crystal structure were prepared by a hydrothermal-sintering ...Fluoride nanoparticles of Ln3＋（Ln3＋=Pr3＋, Nd3＋, Sm3＋, Cod3＋,Tb3＋ Dy3＋, I-I03＋, Er3＋, Tm3＋, yb3＋）/Eu3＋：LaOF and Eu3＋：LaOF with rhombohedral crystal structure were prepared by a hydrothermal-sintering method. The red fluorescence emission of Eu3＋ ions was found to be enhanced with most of the co-dopant Ln3. ions. Compared with strong fluorescence emission at 610 nm of Eu3＋：LaOF nanoparticles, the enhancement factors was up to ten times in Ln3~ （Ln3＋=Gd3＋, Dy3＋, Tm3＋）FEu3＋：LaOF co-doped nanoparticles. The results show that the asymmetry of the local environment of Eu3＋ ion was reduced by co-doping Ln3＋ ion into the nanoparticles, and that energy transfer might occur between Eu3_ and codopant Ln3＋ ions, which is suggested as the source of the observed fluorescence enhancement.展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 11174190)the Fundamental Research Funds for the Central Universities (Grant No. GK201101006)+1 种基金Shaanxi Normal University, the Natural Science Foundation (Grant No. NZ11252)the Key Technologies R&D Program (Grant No.08222-19) of Ningxia Province,China
文摘Fluoride nanoparticles of Ln3＋（Ln3＋=Pr3＋, Nd3＋, Sm3＋, Cod3＋,Tb3＋ Dy3＋, I-I03＋, Er3＋, Tm3＋, yb3＋）/Eu3＋：LaOF and Eu3＋：LaOF with rhombohedral crystal structure were prepared by a hydrothermal-sintering method. The red fluorescence emission of Eu3＋ ions was found to be enhanced with most of the co-dopant Ln3. ions. Compared with strong fluorescence emission at 610 nm of Eu3＋：LaOF nanoparticles, the enhancement factors was up to ten times in Ln3~ （Ln3＋=Gd3＋, Dy3＋, Tm3＋）FEu3＋：LaOF co-doped nanoparticles. The results show that the asymmetry of the local environment of Eu3＋ ion was reduced by co-doping Ln3＋ ion into the nanoparticles, and that energy transfer might occur between Eu3_ and codopant Ln3＋ ions, which is suggested as the source of the observed fluorescence enhancement.
