Implementation of graphene multilayer electrodes in quantum dot light-emitting devices

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Wolff S., Jansen D., Terlinden H., Kelestemur Y., Mertin W., Demir H. V., ...More

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, vol.120, no.3, pp.1197-1203, 2015 (SCI-Expanded) identifier identifier


Graphene is a highly attractive candidate for implementation as electrodes in next-generation large-area optoelectronic devices thanks to its high electrical conductivity and high optical transparency. In this study, we show all-solution-processed quantum dot-based light-emitting devices (QD-LEDs) using graphene mono- and multilayers as transparent electrodes. Here, the effect of the number of graphene layers (up to three) on the QD-LEDs performance was studied. While the implementation of a second graphene layer was found to reduce the turn-on voltage from 2.6 to 1.8 V, a third graphene layer was observed to increase the turn-on voltage again, which is attributed to an increased roughness of the graphene layer stack.