Unleashing the Potential of Rare Earth Ions in Modified Calcium Titanate for Strategic Anti-Counterfeiting Application

Abstract

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