Potential End-Use of a Europium Binary Photoluminescent Ink for Anti-Counterfeiting Security Documents.

ABSTRACT: Composed of two europium complexes doped in polyvinyl butyral as the host material, a novel photoluminescent ink has been formulated by synthesizing Eu(FAC)₃Phen as a red luminescent down-shifting emitter and employing SrAl₂O₄:Eu, Dy as a long persistent green phosphor. Both emitters are incorporated to design a photoluminescent ink with binary emission under a single UV excitation wavelength, where a red light is emitted when exposed under 325 nm, subsequently becoming green upon the UV light being switched off. The concept presented here is unequivocally distinct from the classical dual-mode emission, which requires a second extra near-infrared excitation around 980 nm to produce a binary luminescence. This work demonstrates the effortlessness of using on

SUBMITTER: Moudam O 

PROVIDER: S-EPMC8582051 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature