Effects of local structure of Ce(3+) ions on luminescent properties of Y3Al5O12:Ce nanoparticles.

ABSTRACT: Ce(3+)-doped yttrium aluminum garnet (YAG:Ce) nanocrystals were successfully synthesized via a facile sol-gel method. Multiple characterization techniques were employed to study the structure, morphology, composition and photoluminescence properties of YAG:Ce nanophosphors. The YAG:Ce0.0055 sintered at 1030?°C exhibited a typical 5d(1)-4f(1) emission band with the maximum peak located at 525?nm, and owned a short fluorescence lifetime ?1 (~28?ns) and a long fluorescence lifetime ?2 (~94?ns). Calcination temperature and Ce(3+) doping concentration have significant effects on the photoluminescence properties of the YAG:Ce nanophosphors. The emission intensity was enhanced as the calcination temperature increased from 830 to 1030?°C, but decreased dramatically with the increase of Ce(3+) doping concentration from 0.55 to 5.50 at.% due to the concentration quenching. By optimizing the synthesized condition, the strongest photoluminescence emission intensity was achieved at 1030?°C with Ce(3+) concentration of 0.55 at.%.

SUBMITTER: He X 

PROVIDER: S-EPMC4776235 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature