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Cr 3+ :SrGa 12 O 19 : A Broadband Near‐Infrared Long‐Persistent Phosphor
Author(s) -
Xu Ju,
Chen Daqin,
Yu Yunlong,
Zhu Wenjuan,
Zhou Jiangchong,
Wang Yuansheng
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201400009
Subject(s) - phosphor , thermoluminescence , persistent luminescence , photoluminescence , phosphorescence , infrared , luminescence , ultraviolet , materials science , doping , ion , irradiation , conduction band , analytical chemistry (journal) , optoelectronics , electron , optics , chemistry , physics , fluorescence , organic chemistry , chromatography , quantum mechanics , nuclear physics
Cr 3+ ‐doped SrGa 12 O 19 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 SrGa 12 O 19 samples indicate that the persistent energy transfer from the SrGa 12 O 19 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.