Wolff, S.Jansen, D.Terlinden H.Kelestemur, Y.Mertin W.Demir, Hilmi VolkanBacher G.Nannen, E.2016-02-082016-02-0820150947-8396http://hdl.handle.net/11693/21647Graphene 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. © 2015, Springer-Verlag Berlin Heidelberg.EnglishCurrent densityElectrodesGrapheneLight emissionMonolithic microwave integrated circuitsMultilayersOptoelectronic devicesSemiconductor quantum dotsGraphene layersGraphene multilayersHigh electrical conductivityLight emitting devicesMono- and multilayerOptical transparencyTransparent electrodeTurn-on voltagesLight emitting diodesArticle10.1007/s00339-015-9304-z