title: The effects of Mn2+ doping on the luminescence properties of 12CaO 7Al2O:Eu2+ nanocrystal phosphor.
abstract: The long lasting blue phosphorescence (LLP) and photostimulated luminescence (PSL) after ultraviolet light irradiation at room temperature in 12CaO 7Al2O3:xEu2+, yMn2+ (x = 0, 0.001; y = 0, 0.01) prepared by the chemical co-precipitation method were observed. It was shown that novel oxide 12CaO 7Al2O3:Eu2+, Mn2+ (C12A7:Eu2+, Mn2+) with unique nanocage structure can store energy when irradiated with 365 nm photons. And photon energy can be subsequently released by exposed to 980 nm light. The codopant Mn2+ enhances the intensity of the persistent phosphorescence and PSL due to the existence of more shallow and new deeper electron traps in C12A7: Eu2+, Mn2+. A model for energy storing and recovering and the detailed mechanism of PSL are presented through comparing with the luminescence properties of the co-doped C12A7:Eu2+, Mn2+ and C12A7:Eu2+.
authors.affiliation: Center for Advanced Opto-Electronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun 130024, People's Republic of China.
authors.forename: X L
authors.initials: XL
authors.lastname: Yan
authors.forename: Y X
authors.initials: YX
authors.lastname: Liu
authors.forename: D T
authors.initials: DT
authors.lastname: Yan
authors.forename: H C
authors.initials: HC
authors.lastname: Zhu
authors.forename: C G
authors.initials: CG
authors.lastname: Liu
authors.forename: C S
authors.initials: CS
authors.lastname: Xu