Fluorescent Carbon‐ and Oxygen‐Doped Hexagonal Boron Nitride Powders as Printing Ink for Anticounterfeit Applications

Increasing demands for optical anticounterfeiting technology require the development of versatile luminescent materials with tunable photoluminescence properties. Herein, a number of fluorescent carbon‐ and oxygen‐doped hexagonal boron nitride (denoted as BCNO) phosphors are found to offer a such hi...

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Bibliographic Details
Published in:Advanced optical materials 2019-12, Vol.7 (24), p.n/a
Main Authors: Liu, Feng, Nattestad, Andrew, Naficy, Sina, Han, Rui, Casillas, Gilberto, Angeloski, Alexander, Sun, Xudong, Huang, Zhenguo
Format: Article
Language:English
Subjects:
anticounterfeit
Boron nitride
Carbon
Fluorescence
fluorescent printing inks
Luminescence
Materials science
Optical properties
Optics
Organic chemistry
Oxidation
Particle shape
Phosphors
Photoluminescence
Ultraviolet radiation
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Summary:Increasing demands for optical anticounterfeiting technology require the development of versatile luminescent materials with tunable photoluminescence properties. Herein, a number of fluorescent carbon‐ and oxygen‐doped hexagonal boron nitride (denoted as BCNO) phosphors are found to offer a such high‐tech anticounterfeiting solution. These multicolor BCNO powders, developed in a two‐step process with controlled annealing and oxidation, feature rod‐like particle shape, with varied luminescence properties. Studies of the optical properties of BCNO, along with other characterization, provide insight into this underexplored material. Anticounterfeiting applications are demonstrated with printed patterns which are indistinguishable to the naked eye under visible light but become highly discernible under UV irradiation. The fabricated patterns are demonstrated to be both chemically stable in corrosive environments and physically robust in mechanical bending testing. These properties render BCNO as promising and versatile anticounterfeiting material a wide variety of environments. A facile method is developed to produce multicolor carbon‐ and oxygen‐doped hexagonal boron nitride (BCNO) powders with tunable compositions and emissions. When used for anticounterfeit applications, the BCNO embedded patterns display highly visible patterns under UV illumination, even in harsh environment and in mechanic testing.
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.201901380