title: [Quantum efficiency of the 5D0 level of Eu3+ at C2 site in cubic nanocrystalline Y2O3].
abstract: In the present the authors are trying to work out how the quantum efficiency depends on the nanocrystalline size. Cubic nanocrystalline Y2O3 : Eu3+ samples were prepared by chemical self-combustion. The bulk Y2O3 : Eu3+ was obtained by annealing the nanocrystalline at 1 000 degrees C for 2 h. The emission spectra, XRD and fluorescence decay showed that the emission intensities are increased and fluorescence decay becomes slow with an increase in particle diameter of the samples. Two routes were used to estimate the quantum efficiency of the 5D0 level of Eu3+ at C2 site. The quantum efficiencies of 5D0 level of Eu3+ at C2 site in the samples depend on the nanocrystalline sizes. Finally, a detailed discussion about these two approaches for estimating the quantum efficiencies was made.
authors.affiliation: Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
authors.forename: Qing-Yu
authors.initials: QY
authors.lastname: Meng
authors.forename: Bao-Jiu
authors.initials: BJ
authors.lastname: Chen
authors.forename: Wu
authors.initials: W
authors.lastname: Xu
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Wang
authors.forename: Yi-Hua
authors.initials: YH
authors.lastname: Xie
authors.forename: Hua-Sheng
authors.initials: HS
authors.lastname: Lai
authors.lastname: Di Wei-Hua
authors.forename: Guo-Zhong
authors.initials: GZ
authors.lastname: Ren
authors.forename: Xiao-Xia
authors.initials: XX
authors.lastname: Zhao
authors.forename: Yan-Min
authors.initials: YM
authors.lastname: Yang