Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
ACS Nano. 2010 Jan 26;4(1):43-8. doi: 10.1021/nn900728d.
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.
理论估计表明，石墨烯薄膜可用作薄膜器件（如太阳能电池和有机发光二极管）的透明电极，其方阻和透光率具有无与伦比的组合。我们展示了使用溶液处理的石墨烯薄膜透明导电阳极的有机发光二极管。石墨烯电极通过旋涂功能化石墨烯的水性分散体沉积在石英衬底上，然后进行真空退火步骤以降低方阻。小分子有机材料和金属阴极直接沉积在石墨烯阳极上，得到的器件性能与在氧化铟锡透明阳极上的对照器件相当。石墨烯和氧化铟锡上器件的出光效率几乎相同，与模型预测相符。
