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

Li Meng; Elena V. Ushakova; Zhengjie Zhou; Enshan Liu; Di Li; Ding Zhou; Zhanao Tan; Songnan Qu; Andrey L. Rogach

doi:10.1039/C9QM00659A

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

Li Meng,^ab Elena V. Ushakova,

^c Zhengjie Zhou,^ab Enshan Liu,^d Di Li,^a Ding Zhou,^a Zhanao Tan,

^e Songnan Qu*^d and Andrey L. Rogach

^cf

Author affiliations

* Corresponding authors

^a State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China

^b University of Chinese Academy of Sciences, Beijing 100049, P. R. China

^c Center of Information Optical Technologies, ITMO University, Saint Petersburg 197101, Russia

^d Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau, P. R. China
E-mail: songnanqu@um.edu.mo

^e Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China

^f Department of Materials Science and Engineering, and Centre for Functional Photonics, City University of Hong Kong, Kowloon, 83 Tat Chee Avenue, Hong Kong SAR, P. R. China

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.

This article is part of the themed collection: Carbon Dots

Supplementary files

Article information

DOI: https://doi.org/10.1039/C9QM00659A
Article type: Research Article
Submitted: 25 Oct 2019
Accepted: 09 Dec 2019
First published: 24 Dec 2019

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Mater. Chem. Front., 2020,4, 517-523

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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, 4, 517 DOI: 10.1039/C9QM00659A

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