Organic Light-Emitting Diodes on Solution-Processed Graphene Transparent Electrodes

Junbo Wu, Mukul Agrawal, Héctor A. Becerril, Zhenan Bao, Zunfeng Liu, Yongsheng Chen, Peter Peumans

Research output: Contribution to journalArticlepeer-review

784 Scopus citations

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 spincoating 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. © 2010 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)43-48
Number of pages6
JournalACS Nano
Volume4
Issue number1
DOIs
StatePublished - Nov 10 2009
Externally publishedYes

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