Cr 3+ :SrGa 12 O 19 : A Broadband Near‐Infrared Long‐Persistent Phosphor
2014; Wiley; Volume: 9; Issue: 4 Linguagem: Inglês
10.1002/asia.201400009
ISSN1861-4728
AutoresJu Xu, Daqin Chen, Yunlong Yu, Wenjuan Zhu, Jiangcong Zhou, Yuansheng Wang,
Tópico(s)Luminescence and Fluorescent Materials
ResumoCr(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.
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