Nanocrystalline Y_2O_3∶Eu powders doped with different metal ions M (M: Li +,Na +,K +,Mg (2+),Sr (2+),Ba (2+),B (3+) and Al (3+)) were synthesized by glycine combustion. Their structure and luminescent properties wer...Nanocrystalline Y_2O_3∶Eu powders doped with different metal ions M (M: Li +,Na +,K +,Mg (2+),Sr (2+),Ba (2+),B (3+) and Al (3+)) were synthesized by glycine combustion. Their structure and luminescent properties were studied and compared with each other. The nanocrystalline Y_2O_3 were cubic in symmetry by XRD pattern. It can be concluded that co-doping can modify the size and crystallinity of nanoparticles. As a consequence,the luminescent properties such as the fluorescent intensity,lifetime of (() 5D_0)-(() 7F_2) and the location of charge transfer band (CT band) vary with co-dopants. The variation depends more strongly on the crystallinity of nanoparticles than the size. Especially,in Li +-doped Y_2O_3∶Eu nanoparticles,the emission intensity improves as large as three times than that of undoped ones.展开更多
文摘Nanocrystalline Y_2O_3∶Eu powders doped with different metal ions M (M: Li +,Na +,K +,Mg (2+),Sr (2+),Ba (2+),B (3+) and Al (3+)) were synthesized by glycine combustion. Their structure and luminescent properties were studied and compared with each other. The nanocrystalline Y_2O_3 were cubic in symmetry by XRD pattern. It can be concluded that co-doping can modify the size and crystallinity of nanoparticles. As a consequence,the luminescent properties such as the fluorescent intensity,lifetime of (() 5D_0)-(() 7F_2) and the location of charge transfer band (CT band) vary with co-dopants. The variation depends more strongly on the crystallinity of nanoparticles than the size. Especially,in Li +-doped Y_2O_3∶Eu nanoparticles,the emission intensity improves as large as three times than that of undoped ones.
