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Luminescent Polymer Composite Films Containing Coal-Derived Graphene Quantum Dots

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journal contribution
posted on 02.12.2015, 00:00 by Anton Kovalchuk, Kewei Huang, Changsheng Xiang, Angel A. Martí, James M. Tour
Luminescent polymer composite materials, based on poly­(vinyl alcohol) (PVA), as a matrix polymer and graphene quantum dots (GQDs) derived from coal, were prepared by casting from aqueous solutions. The coal-derived GQDs impart fluorescent properties to the polymer matrix, and the fabricated composite films exhibit solid state fluorescence. Optical, thermal, and fluorescent properties of the PVA/GQD nanocomposites have been studied. High optical transparency of the composite films (78 to 91%) and excellent dispersion of the nanoparticles are observed at GQD concentrations from 1 to 5 wt %. The maximum intensity of materials photoluminescence has been achieved at 10 wt % GQD content. These materials could be used in light emitting diodes (LEDs), flexible electronic displays, and other optoelectronic applications.