A dynamic irradiation-responsive material for advanced anti-counterfeiting in dark and bright fields

Anti-counterfeiting is an important issue in this time of information. However, the most significant shortcoming of the present luminescence anti-counterfeiting is that the luminescent color and body color of the anti-counterfeiting label will not change under irradiation, so it is easy to be counte...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2022-03, Vol.1 (11), p.4218-4223
Main Authors: Dong, Wenbo, Wang, Wenxiang, Wang, Mingyu, Zhang, Jiachi, Wang, Yuhua
Format: Article
Language:English
Subjects:
Counterfeiting
Irradiation
Photochromism
Photoluminescence
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Summary:Anti-counterfeiting is an important issue in this time of information. However, the most significant shortcoming of the present luminescence anti-counterfeiting is that the luminescent color and body color of the anti-counterfeiting label will not change under irradiation, so it is easy to be counterfeited by substitutions. In this work, an interesting dynamic irradiation-responsive material CaZnGe 2 O 6  : Pb 2+ is developed. It is demonstrated that the CaZnGe 2 O 6  : Pb 2+ material shows dynamic photoluminescence in the dark field and dynamic photochromism in the bright field under irradiation. Consequently, the photoluminescent color and body color of the CaZnGe 2 O 6  : Pb 2+ powder could change dynamically under irradiation. Based on the unique irradiation-responsive features, a CaZnGe 2 O 6  : Pb 2+ /PDMS film label is fabricated for anti-counterfeiting applications in both dark and bright fields, and it shows excellent application potential in advanced anti-counterfeiting. An interesting dynamic irradiation-responsive material CaZnGe 2 O 6  : Pb 2+ is developed, which shows unique dynamic photoluminescence/photochromism properties under irradiation and advanced anti-counterfeiting applications in dark and bright fields.
ISSN:2050-7526
2050-7534
DOI:10.1039/d2tc00215a