title: [Preparation and up-conversion luminescence properties of Yb3+/Tm3+ co-doped Sb2O4 powder].
abstract: The Sb2O4:Yb3+, Tm3+ up-conversion luminescence powder with excellent physical, chemical stability and relative low phonon energy was synthesized by the high temperature solid-state reaction and its up-conversion luminescence property was investigated. Under the 980 nm excitation, infrared and blue up-conversion emissions centered at 800 and 480 nm were observed, which were assigned to the 1G4-->3H6 and 3H4-->3 He transitions of Tm2+, respectively. The influence of Yb3+ and Tm3+ concentration on the up-conversion emission property was also obtained. The up-conversion luminescence increases with increasing of Yb3+ and Tm3+ concentration. Additionally, the up-conversion luminescence mechanism was discussed based on the dependence of Tm3+ up-conversion luminescence on pump power. It is interesting that two photon excitation processes for blue and infrared emission were observed in the Sb2O04: Yb3+, Tm3+ powder under a 980 nm excitation. Based on the energy level diagram of Tma3 and Yb2+ ions, we think that two photons blue emission is contributed to the cooperation energy transfer between Tm"+ and Yb3+ ions. We believe that the Sbz04 : Yb3 , Tm2+ up-conversion luminescence powder will have potential application for new optical devices in up-conversion color displays, sensors, detection of infrared radiation, and lasers.
authors.forename: Rui-Qin
authors.initials: RQ
authors.lastname: Li
authors.forename: Jian-Bei
authors.initials: JB
authors.lastname: Qiu
authors.forename: Zheng-Wen
authors.initials: ZW
authors.lastname: Yang
authors.forename: Jia-Yan
authors.initials: JY
authors.lastname: Liao
authors.forename: Hang-Jun
authors.initials: HJ
authors.lastname: Wu
authors.forename: Shen-Feng
authors.initials: SF
authors.lastname: Lai
authors.forename: Zhi-Guo
authors.initials: ZG
authors.lastname: Song
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.forename: Da-Cheng
authors.initials: DC
authors.lastname: Zhou
authors.forename: Rong-Fei
authors.initials: RF
authors.lastname: Wang