Achieving Multimodal Emission in Zn<sub>4</sub>B<sub>6</sub>O<sub>13</sub>:Tb<sup>3+</sup>,Yb<sup>3+</sup> for Information Encryption and Anti-counterfeiting

Posted on 16.10.2020 - 21:35 by ACS Admin
With the rapid development of technology, information security has always been considered a major challenge. In this work, the excellent combination of persistent luminescence, photoluminescence, up-conversion luminescence, and thermo-luminescence in a particular material Zn4B6O13:Tb3+,Yb3+ synthesized via a solid-state reaction is reported, which can be used for the information encryption and anti-counterfeiting. Tb3+ ions were chosen as the emitting centers for multimodal emissions, and Yb3+ codoping can be used as electron traps and sensitizer to adjust trap distribution and efficient up-conversion luminescence in rare-earth-doped luminescent materials. Besides, the as-prepared luminescent materials exhibit high thermal stability and excellent water resistance. On the basis of these properties, the samples were used to print luminescent images through a screen printing process on the film and banknote. The luminescent image in a film is showing different patterns and on a banknote is showing green emissions under different stimulations. These multimodal emissions demonstrate that the as-prepared sample is suitable for advanced information encryption and anti-counterfeiting.

CITE THIS COLLECTION

Select your citation style and then place your mouse over the citation text to select it.

SHARE

email
need help?
No content here yet