Ce3+/Pr3+: YAGG: A Long Persistent Phosphor Activated by Blue-Light

The requirement of using ultraviolet light to stimulate afterglow luminescence has seriously restricted indoors/outdoors applications of most persistent materials developed hitherto. Herein, efficient blue‐light‐activated Ce3+, Pr3+: YAGG phosphors, showing optimized long‐persistent luminescence las...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2014-08, Vol.97 (8), p.2539-2545
Main Authors: Wang, Bo, Lin, Hang, Yu, Yunlong, Chen, Daqin, Zhang, Rui, Xu, Ju, Wang, Yuansheng
Format: Article
Language:English
Subjects:
Afterglows
Luminescence
Phosphors
Spectra
Three dimensional
Trapping
Tuning
Ultraviolet
Online Access:Get full text
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Summary:The requirement of using ultraviolet light to stimulate afterglow luminescence has seriously restricted indoors/outdoors applications of most persistent materials developed hitherto. Herein, efficient blue‐light‐activated Ce3+, Pr3+: YAGG phosphors, showing optimized long‐persistent luminescence lasting for 1 h, were prepared and investigated in detail with the aid of X‐ray diffraction refinement, steady‐state/persistent photoluminescence spectra, room/low‐temperature persistent decay curves, and three‐dimensional thermo‐luminescence spectra. Notably, the afterglow properties were found highly dependent on the Ga content which greatly alters both the host band gap energy and the Ce3+: 5d level structure and thus is beneficial to the electrons' photoionization and trapping processes. Moreover, Pr3+ additive was found not only prolonged the afterglow lifetime of Ce3+ through improving concentration of carriers captured at the trap, but also served as the red‐emissive centers for color tuning. The persistent energy transfer from Ce3+ to Pr3+ was experimentally demonstrated for the first time.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.12967