title: Luminescence properties of a new green afterglow phosphor NaBaScSi2O7:Eu(2+).
abstract: A novel green afterglow phosphor NaBaScSi2O7:Eu(2+) was prepared by a solid state reaction under a reductive atmosphere. The NaBaScSi2O7:Eu(2+) phosphor shows two emission bands centered at about 424 (weak) and 502 nm (strong) due to the substitution of Eu(2+) in both Ba(+) and Na(2+) sites, and energy transfer from EuBa (424 nm) to EuNa (502 nm) was found. Both EuBa and EuNa contribute to the afterglow process while EuNa dominates. Na0.99BaScSi2O7:0.01Eu(2+) exhibits green long lasting phosphorescence, whose duration is more than 1 h. The thermoluminescence properties of NaBaScSi2O7:Eu(2+) and the relationship between thermoluminescence and thermal quenching properties were discussed in detail. This work provides a new and efficient candidate for long lasting phosphorescence materials.
authors.affiliation: Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, PR China. wyh@lzu.edu.cn.
authors.forename: Gen
authors.initials: G
authors.lastname: Li
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Zeng
authors.forename: Wenbo
authors.initials: W
authors.lastname: Chen
authors.forename: Shaochun
authors.initials: S
authors.lastname: Han
authors.forename: Haijie
authors.initials: H
authors.lastname: Guo
authors.forename: Xicheng
authors.initials: X
authors.lastname: Wang