title: Cr³⁺:SrGa₁₂O₁₉: a broadband near-infrared long-persistent phosphor.
abstract: Cr(3+)-doped SrGa12O19 is demonstrated to be a broadband near-infrared (650-950 nm) long-persistent phosphor whose luminescence can last for more than 2 h after ultraviolet irradiation is stopped. Detailed analysis of the photoluminescence and thermoluminescence spectra and of the persistent decay behavior of the Cr(3+)-doped SrGa12O19 samples indicate that the persistent energy transfer from the SrGa12O19 host to the Cr(3+) ions and the filling and release of electrons into and from the shallow and deep traps through the conduction band is responsible for the long-persistent phosphorescence.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 (P. R. China), Fax: (+86) 591-83705402.
authors.forename: Ju
authors.initials: J
authors.lastname: Xu
authors.forename: Daqin
authors.initials: D
authors.lastname: Chen
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Yu
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Zhu
authors.forename: Jiangchong
authors.initials: J
authors.lastname: Zhou
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Wang
keywords: doping; luminescence; near-infrared emission; solid-state structure