▎ 摘 要
We have carried out a comprehensive study on transparent conductive electrodes (TCEs) made from coating chemical-vapor-deposition grown graphene on Ag nanowire (NW) networks. These TCEs have been further exploited as hole-injection electrodes for organic light-emitting diodes (OLEDs). Our experiments reveal that such hybrid films maintain the high conductivity of Ag NWs and the seamless planar conductive feature of graphene films. The large-area uniform conductive features of these TCEs are directly imaged by conductive atomic force microscopy. The optimal TCEs show a typical sheet resistance of 30 Omega.sq(-1) at a high transparency (86.9% at lambda = 550 nm) and have been used successfully to build small molecular (N, N'-diphenyl-1,1-bihyl-4,4-diamine/tris(8-hydroxyquinoline)aluminum) OLEDs, giving a green lighting with the maximum current efficiency and luminous efficiency of 1.8 cd.A(-1) and 0.6 lm.W-1, respectively.