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Issue 2, 2017
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A dual solvent evaporation route for preserving carbon nanoparticle fluorescence in silica gel and producing white light-emitting diodes

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Abstract

Carbon nanoparticles (C-NPs) are novel and competitive luminescent materials both in academic research and practical applications owing to their environment-friendly behavior and high abundance on Earth. Despite the successes in preparing strongly luminescent C-NPs, preserving the luminescence in solid materials is still challenging. With the aim to produce C-NP-based white-light-emitting diodes (WLEDs), in this work, solvent-dispersible C-NPs are embedded into commercial silica gel via a dual solvent evaporation route. The basic idea is to lower the evaporation rate of the solvents, thus leading to a good dispersion of the C-NPs in the silica gel. This method avoids the aggregation-induced emission quenching of C-NPs in solid materials, and therefore preserves the strong luminescence in the C-NPs/silica gel composites. The composites are further blended with polydimethylsiloxane and act as the color conversion layer on InGaN UV-blue emitting chips, which produces LEDs with a bright white emission.

Graphical abstract: A dual solvent evaporation route for preserving carbon nanoparticle fluorescence in silica gel and producing white light-emitting diodes

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Publication details

The article was received on 12 May 2016, accepted on 19 Jul 2016 and first published on 16 Aug 2016


Article type: Research Article
DOI: 10.1039/C6QM00053C
Citation: Mater. Chem. Front., 2017,1, 387-393
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    A dual solvent evaporation route for preserving carbon nanoparticle fluorescence in silica gel and producing white light-emitting diodes

    Y. Cui, X. Bu, H. Zou, X. Xu, D. Zhou, H. Liu, X. Zhang, Y. Liu, H. Sun, J. Jiang and H. Zhang, Mater. Chem. Front., 2017, 1, 387
    DOI: 10.1039/C6QM00053C

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