Issue 9, 2023

Defect-assisted dynamic multicolor modulation in KLu3F10:Tb crystals for anti-counterfeiting

Abstract

Excitation-dependent dynamic multicolor luminescent materials show potential for promising applications in the field of anti-counterfeiting. However, for most ultraviolet (UV)-excited lanthanide-doped materials, more than two types of activators are incorporated to realize multicolors. In this study, for the first time, KLu3F10:Tb crystals were used to realize excitation-dependent multicolor emissions. The morphology was modified by tuning the surface-coated citric acid (CA) content. During hydrothermal reactions, fluorine vacancy defects are formed on the crystal surface, and carboxyl groups (–COOH) are coated on the crystal surface to maintain the charge balance. Under 254 nm UV excitation, typical Tb3+ green emissions were observed, while a strong broadband emission peaking at 442 nm appeared in addition to these Tb3+ emissions under 365 nm excitation. The energy transfer (ET) process between the defect state and Tb3+ is clarified. This work may promote the development of single-type activator-doped multicolor luminescent materials for high-level anti-counterfeiting.

Graphical abstract: Defect-assisted dynamic multicolor modulation in KLu3F10:Tb crystals for anti-counterfeiting

Supplementary files

Article information

Article type
Paper
Submitted
28 Dec. 2022
Accepted
26 Janv. 2023
First published
27 Janv. 2023

Nanoscale, 2023,15, 4361-4366

Defect-assisted dynamic multicolor modulation in KLu3F10:Tb crystals for anti-counterfeiting

J. Yang, Y. Ping, H. Ma and L. Lei, Nanoscale, 2023, 15, 4361 DOI: 10.1039/D2NR07264E

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