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Zeolite-confined carbon dots: tuning thermally activated delayed fluorescence emission via energy transfer

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Abstract

Confining carbon dots (CDs) in zeolites may boost the thermally activated delayed fluorescence (TADF) emission. However, so far only blue-emissive CD-based TADF materials are reported, and rationally tuning the TADF emission of these materials remains challenging. Herein, by in situ embedding different emissive CDs into a zeolite matrix, we have successfully prepared a series of CD@zeolite composites with tunable TADF emission from blue to green by utilizing energy transfer (ET) between confined CDs. The as-prepared CD@zeolite composites exhibit lifetimes varying from 271 ms to 860 ms and quantum yields ranging from 20% to 42%. The ET process occurs from the singlet excited state of the blue emissive CD donor to the singlet excited state of green emissive CD acceptors with different polymerization degrees, promoting tunable TADF with cyan, mint green and olive green emission. The design concept proposed in this work may open a way to judicious tuning of the emission of TADF materials, and thus may broaden the applications of CD-based TADF materials.

Graphical abstract: Zeolite-confined carbon dots: tuning thermally activated delayed fluorescence emission via energy transfer

  • This article is part of the themed collection: Carbon Dots
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Publication details

The article was received on 29 Aug 2019, accepted on 01 Oct 2019 and first published on 02 Oct 2019


Article type: Research Article
DOI: 10.1039/C9QM00549H
Mater. Chem. Front., 2019, Advance Article

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    Zeolite-confined carbon dots: tuning thermally activated delayed fluorescence emission via energy transfer

    H. Zhang, J. Liu, B. Wang, K. Liu, G. Chen, X. Yu, J. Li and J. Yu, Mater. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QM00549H

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