Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5402697 | Journal of Luminescence | 2009 | 4 Pages |
Abstract
Luminescence properties of Lu2O3:Eu3+ and Lu2O3:Tb3+ nanocrystalline powders with the particle size varying from 46 to 6Â nm were studied under excitation by synchrotron radiation in the photon energy range (up to â¼22.5Â eV) covering the region where the processes of multiplication of electronic excitation occur. It was found that the excitation spectra of Tb3+ emission from all Lu2O3:Tb3+ nanopowders have similar behavior, whereas the shape of the excitation spectra of Eu3+ emission from Lu2O3:Eu3+ nanopowders strongly depends on the particle size. The difference in the behavior of Lu2O3:Eu3+ and Lu2O3:Tb3+ nanophosphor systems was explained by different mechanisms of the energy transfer from the host to Eu3+ or Tb3+ ions (either the hole or electron recombination mechanism, respectively), which are differently influenced by losses of electronic excitations near the particle surface.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Vladimir N. Makhov, Cheslav Lushchik, Aleksandr Lushchik, Marco Kirm, Zhi-Fang Wang, Wei-Ping Zhang, Min Yin, Jing-Tai Zhao,