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Microwave-assisted in situ large scale synthesis of a carbon dots@g-C3N4 composite phosphor for white light-emitting devices

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Abstract

Sustainable, environment-friendly phosphors produced from cheap and readily available precursor materials using green preparation processes are in high demand for lighting applications. Herein, a composite phosphor comprising carbon dots (CDs) and graphitic carbon nitride (g-C3N4) is prepared on a large scale from citric acid and urea in water, through a green microwave assisted in situ heating method. An optimized CDs@g-C3N4 composite with a 1 wt% loading of CDs shows a strong green emission under 410 nm excitation, with a photoluminescence quantum yield of 62% in the solid state. Using this composite as a phosphor in the color conversion layer, a white light emitting diode with a power efficiency of up to 42 lm W−1 is fabricated.

Graphical abstract: Microwave-assisted in situ large scale synthesis of a carbon dots@g-C3N4 composite phosphor for white light-emitting devices

  • This article is part of the themed collection: Carbon Dots
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Article information


Submitted
25 Oct 2019
Accepted
09 Dec 2019
First published
24 Dec 2019

Mater. Chem. Front., 2020, Advance Article
Article type
Research Article

Microwave-assisted in situ large scale synthesis of a carbon dots@g-C3N4 composite phosphor for white light-emitting devices

L. Meng, E. V. Ushakova, Z. Zhou, E. Liu, D. Li, D. Zhou, Z. Tan, S. Qu and A. L. Rogach, Mater. Chem. Front., 2020, Advance Article , DOI: 10.1039/C9QM00659A

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