title: 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 τ1 (~28 ns) and a long fluorescence lifetime τ2 (~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.%.
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Xiaowu
authors.initials: X
authors.lastname: He
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Liu
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Rongfeng
authors.initials: R
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Bai
authors.initials: B
authors.lastname: Yang
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Kaili
authors.initials: K
authors.lastname: Yu
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Min
authors.initials: M
authors.lastname: Zeng
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Ronghai
authors.initials: R
authors.lastname: Yu