Issue 35, 2018

Phototunable full-color emission of dynamic luminescent materials

Abstract

A dynamic luminescent material that can change its color upon exposure to different photo-stimuli is significantly important and always desirable in color-on-demand applications such as anticounterfeiting and encryption. Herein, a facile approach for the fabrication of full-color dynamic luminescent materials based on trichromacy and dynamical afterglow was reported. Trichromic (green, blue, and red) luminescent materials (SrAl2O4:Eu2+,Dy3+, CaAl2O4:Eu2+,Nd3+ and Ca0.25SrS0.75:Eu2+) were synthesized by a high temperature solid state method. After simply blending them together, a dynamic full range of afterglow was observed after ultraviolet-visible (UV-vis) lamp irradiation. The afterglow intensity of mixtures revealed the existence of an interaction impact and energy transfer between components. The emissive colors were tunable in the full-color region simply by adjusting the blending ratio or excitation wavelengths. Moreover, the mixtures revealed the photo-stimuli responsive properties from different excitation sources. Ultimately, a luminescent three-dimensional (3D) code that could be read out by using a smartphone was prepared through this blended trichromic material. As a result, the pattern could only be read out after UV-vis lamp irradiation and could be converted to other information. These results indicate a facile, simple, and effective method for information encryption, conversion, and dynamic anticounterfeiting.

Graphical abstract: Phototunable full-color emission of dynamic luminescent materials

Supplementary files

Article information

Article type
Paper
Submitted
16 Jun 2018
Accepted
10 Aug 2018
First published
11 Aug 2018

J. Mater. Chem. C, 2018,6, 9552-9560

Phototunable full-color emission of dynamic luminescent materials

C. Shi, Y. Zhu, G. Zhu, X. Shen and M. Ge, J. Mater. Chem. C, 2018, 6, 9552 DOI: 10.1039/C8TC02955E

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