title: Intense red upconversion luminescence from Tm3+/Yb3+ codoped transparent glass ceramic.
abstract: Tm3+/Yb3+ codoped transparent glass ceramic containing β-PbF2 nanocrystals was successfully prepared. After thermal treatment, emissions from the state of Tm3+ excited by 980 nm laser were greatly quenched by cross relaxation and the 700 nm luminescence from Tm3+:3F2,3→3H6 transition was strongly enhanced. A nearly monochromatic red luminescence band was observed. Based on the luminescence decay curves and Judd-Ofelt analysis, the strengthened cross relaxation played an important role in such phenomenon.
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
authors.forename: Jianmin
authors.initials: J
authors.lastname: Chen
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Zhang
authors.forename: Wenwu
authors.initials: W
authors.lastname: Cao