Synthesis Of Highly Luminescent Carbon Dots@Polyacrylate Sodium Composites With High Loading Fraction And Their Application In Light-Emitting Diodes

Luminescent materials have wide application prospects in many fields,and hence they have drawn increasing attention.In this work,carbon dots(g-CDs)and polyacrylate sodium(PAAS)are used as raw materials.By combining g-CDs aqueous solution with PAAS,a luminescent composites(g-CDs@PAAS)is obtained.Because the PAAS has a large number of carboxyl group and strong water imbibition thereof,while there are lots of carboxyl,hydroxyl and amino groups on g-CDs surface,leading to the combination of PAAS with g-CDs through hydrogen bonding interaction.In the as-prepared composites,g-CDs maintain monodisperse,which effectively overcomes the aggregation-induced solid-state luminescence quenching of g-CDs.This synthetic method is simple to operate and has no loss of raw materials during the preparation.The loading g-CDs fraction in g-CDs@PAAS is up to 30 wt%,and its photoluminescence quantum yields could achieve 52%.In addition,the g-CDs@PAAS composites has good thermal stability,photostability and organic solvent resistance.These advantages ensure that g-CDs@PAAS composites can be used as color conversion layer in the manufacturing of white light-emitting diode.