title: Organic light-emitting diodes on solution-processed graphene transparent electrodes.
abstract: Theoretical estimates indicate that graphene thin films can be used as transparent electrodes for thin-film devices such as solar cells and organic light-emitting diodes, with an unmatched combination of sheet resistance and transparency. We demonstrate organic light-emitting diodes with solution-processed graphene thin film transparent conductive anodes. The graphene electrodes were deposited on quartz substrates by spin-coating of an aqueous dispersion of functionalized graphene, followed by a vacuum anneal step to reduce the sheet resistance. Small molecular weight organic materials and a metal cathode were directly deposited on the graphene anodes, resulting in devices with a performance comparable to control devices on indium-tin-oxide transparent anodes. The outcoupling efficiency of devices on graphene and indium-tin-oxide is nearly identical, in agreement with model predictions.
authors.affiliation: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
authors.forename: Junbo
authors.initials: J
authors.lastname: Wu
authors.forename: Mukul
authors.initials: M
authors.lastname: Agrawal
authors.forename: Héctor A
authors.initials: HA
authors.lastname: Becerril
authors.forename: Zhenan
authors.initials: Z
authors.lastname: Bao
authors.forename: Zunfeng
authors.initials: Z
authors.lastname: Liu
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Chen
authors.forename: Peter
authors.initials: P
authors.lastname: Peumans