The Fabrication And Characterization Of Reduced Graphene Oxide/Silver Nanowires Flexible Hybrid Electrodes

In recent years, transparent conductive electrode (TCE) has attracted increasing interest because it is a fundamental component in a variety of optoelectronic devices, such as organic light-emitting diodes (OLEDs), touch sensing panels (TSPs),organic photovoltaics (OPVs). While the novel concepts of bendable, stretchable and wearable devices are proposed, the realization of flexibility must be the focus of plentiful electrode researches. To date, indium tin oxide (ITO) is the major material used for transparent conductive films (TCFs) due to the high conductivity and transmittance. However, the high processing temperature, brittleness and the increasing cost of indium seriously limit the practical application of ITO in the emerging flexible and large-area electronics. Therefore, exploiting several other alternative materials which are flexible, all-solution-processed, cheap has profound meanings and practical application prospect.So far, several other new materials including metal oxide transparent films, organic conductive polymers such as PEDOT:PSS, carbon nanostructures based on carbon nanotubes (CNTs) and graphene have been investigated as alternatives. Comprehensive consideration of conductivity, transmittance stability and flexibility, graphene is one of the most promising alternative materials. However,polycrystalline graphene has defects, ripples and wrinkles which have a detrimental effect on graphene transportproperties through the scattering of the charge carriers. It isfound that graphene integrated with metal nanowires (NWs)effectively decreases the square resistance of graphene films.In this paper, we demonstrated a flexible hybrid electrode based on reduced graphene oxide (RGO) and silver nanowires (AgNW). The RGO was prepared by thermal reduction and hydrazine reduction of graphene oxide to partially remove the oxygen-containing groups and to restore its electrical properties. We employed AgNW to restore the defects in RGO films, such as grain boundaries and wrinkles, to improve the conductivity of the electrodes. By optimizing the processing conditions, the flexible hybrid electrode exhibited excellent optical and electrical characteristics as well as mechanical flexibility. The optical transmittance and sheet resistance of the hybrid electrode were 62% at 550 nm and 420 ?sq-1. The successful integration of RGO/AgNW hybrid film shows the potential for a wide range of flexible and stretchable optoelectronic device applications.Then we tried to fabricate reduced graphene oxide (RGO) and silver nanowires (AgNW) flexible hybrid electrodes using filter membrane. The RGO was prepared by hydrazine reduction of graphene oxide to partially remove the oxygen-containing groups and to restore its electrical properties. We make an attempt to improve the surface topography of RGO film via the dilution of hydrazine and the decrease of reduction time. The optical transmittance and sheet resistance of the hybrid electrode were 60% at 550 nm and 722 ? sq-1...