title: [Up-conversion luminescence in nanocrystalline zirconia co-doped with Yb3+ and Tm3+ ions].
abstract: Nanocrystalline zirconia co-doped with Yb3+ and Tm3+ ions was prepared by co-precipitation. Up-conversion luminescence of the samples doped with different Tm3+ concentrations was investigated under a 980 nm LD excitation. When x = 0.2 and 0.4, the luminescences of the two samples were mostly the same: strong blue up-conversion peaked at 474 nm and very weak red up-conversion were observed, corresponding to the transitions of 1G4 --> 3H6 and 1G4 --> 3F4 respectively. However, there was no luminescence of x = 1. Blue up-conversion luminescence of 0.2 mol% Tm3+-ions-doped nanocrystalline zirconia under different annealing temperatures was investigated. Blue up-conversion emission grew stronger with annealing temperature increasing. With pumping current increasing, blue up-conversion emission grew stronger too. By studying the sources of blue up-conversion, we concluded that it was three-photon process.
authors.affiliation: Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022, China.
authors.forename: Huang-qing
authors.initials: HQ
authors.lastname: Liu
authors.forename: Guan-shi
authors.initials: GS
authors.lastname: Qin
authors.forename: Hai-yan
authors.initials: HY
authors.lastname: Lin
authors.forename: Chang-feng
authors.initials: CF
authors.lastname: Wu
authors.forename: Wei-ping
authors.initials: WP
authors.lastname: Qin
authors.forename: Ji-sen
authors.initials: JS
authors.lastname: Zhang
authors.forename: Dan
authors.initials: D
authors.lastname: Zhao
mesh_terms: D007477:Ions / Q000737:chemistry; D049449:Luminescence; D008163:Luminescent Measurements; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology; D013691:Tellurium / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D007477:Ions; D015040:Zirconium; D015018:Ytterbium; D013691:Tellurium; C028541:zirconium oxide