Unleashing the potential of rare earth ions in modified calcium titanate for strategic anti-counterfeiting application

Chem Commun (Camb). 2025 Jan 7. doi: 10.1039/d4cc05643d. Online ahead of print.

Abstract

Technological advancements have intensified the demand for effective counterfeiting protection. This work presents multi-level security features in a (Ca,Zn)TiO3:Pr3+,Er3+ phosphor. A dual doping strategy synergistically results in dynamically changing luminescence emission. Upon excitation at 379 nm, the sample exhibits a yellowish green emission and exhibits deep red persistent emission for 12 minutes.