期刊
MATERIALS RESEARCH BULLETIN
卷 155, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2022.111977
关键词
Bi-luminescent security ink; Anticounterfeiting; Photoluminescence; Lanthanide; Halide perovskite
In this work, a bi-luminescent security ink has been developed that offers multilevel anti-counterfeiting strategies and exhibits good stability in different environments.
Counterfeiting is of great concern globally and requires technological research and development for high-security encryption. In this work, we have developed a bi-luminescent security ink comprising Eu(TTA)(3)Phen and CsPbBr3 nanocrystals which offers multilevel anti-counterfeiting strategies. Under UV excitation, the bi-luminescent security ink shows intense red emission, whereas it emits green emission under blue light excitation. As the red transition of Eu3+ ions show a lifetime of the order of microseconds and the green band of CsPbBr3 nanocrystals of the order of nanoseconds, the ink can also be used for dynamic anticounterfeiting under a single excitation wavelength. We have successfully demonstrated the multi-stimuli anticounterfeiting application of the developed bi-luminescent security ink. The dynamic anticounterfeiting aspect has been demonstrated by making use of the phosphorescence spectrum of the printed patterns. Our results show that the developed bi-luminescent security ink is very stable under UV light, different chemical environments, and ambient environments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据