Long-lived room-temperature phosphorescent carbon dot-based composites for anti-counterfeiting and information encryption

Abstract

Here, we report a simple solvent-free strategy for preparing blue-green room-temperature phosphorescent carbon dot-based composites by heat treating terephthalic acid (TPA) and boric acid (BA) at 250 °C. The designed composites (CDs@B2O3) exhibit an ultralong lifetime of 1.768 s, lasting over 25 s to the naked eye, concurrently with a photoluminescence quantum yield (PLQY) of 33.2%. Furthermore, the CDs@B2O3 composites have been applied to anti-counterfeiting, information encryption, and delayed lighting. This work provides a novel strategy for designing metal-free room-temperature phosphorescent carbon dots with sustained luminescence, revealing promising potential for advanced applications.

Graphical abstract: Long-lived room-temperature phosphorescent carbon dot-based composites for anti-counterfeiting and information encryption

Supplementary files

Article information

Article type
Communication
Submitted
26 May 2025
Accepted
04 Aug 2025
First published
05 Aug 2025

Chem. Commun., 2025, Advance Article

Long-lived room-temperature phosphorescent carbon dot-based composites for anti-counterfeiting and information encryption

Y. Jie, J. Yan, Z. Fan, F. Li, T. Meng, Z. Guo and P. Dai, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC02959G

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