Phosphor-in-glass with time-evolving multicolor luminescence for dynamic anticounterfeiting

Abstract The conventional luminescent materials used in the anticounterfeiting field generally exhibit unicolor output and a single-wavelength excitation mode, resulting in a poor anticounterfeiting effect. Herein, we successfully achieved a new transparent SrAl 2 O 4 :Eu 2+ ,Dy 3+ /CaAlSiN 3 :Eu 2+...

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Published inMaterials research express Vol. 10; no. 3; pp. 35202 - 35209
Main Authors Zhu, Lihong, Yu, Yunlong, Li, Xiaoyan, Yu, Muxin, Guan, Xiangfeng, Lv, Jiangquan, Zhang, Zhiren, Gao, Kun
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2023
Subjects
Color
dynamic multicolor
Europium
Excitation
Luminescence
phosphor-in-glass
Phosphors
time-dependent luminescence
Ultraviolet radiation
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Summary:Abstract The conventional luminescent materials used in the anticounterfeiting field generally exhibit unicolor output and a single-wavelength excitation mode, resulting in a poor anticounterfeiting effect. Herein, we successfully achieved a new transparent SrAl 2 O 4 :Eu 2+ ,Dy 3+ /CaAlSiN 3 :Eu 2+ phosphor-in-glass (PiG) with dynamic luminescence color variation from red to yellow in hundreds of seconds during the ultraviolet lamp irradiation and green persistent luminescence (PersL) after ceasing excitation. Additionally, the prepared PiG owns excitation wavelength- or doping weight ratio-dependent color-tunable luminescence. As a proof-of-concept experiment, the specially designed SrAl 2 O 4 :Eu 2+ ,Dy 3+ /CaAlSiN 3 :Eu 2+ PiG based flower patterns exhibit dynamic luminescence color variation under a simple ultraviolet lamp, and can be observed for quick discrimination. This work exploits a new perspective for the design of dynamic multicolor anticounterfeiting materials.
Bibliography:MRX-126769.R1
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/acc0df