High performance transparent electrodes combining graphene with Joule-heated welded silver nanowires

Abstract

Various low-dimensional materials are widely used in many fields, such as electroluminescent devices, sensors, solar cells and so on. Among these candidates, silver nanowire-based electrodes stand out due to their excellent optoelectronic properties. In this paper, silver nanowire composite electrodes were welded by Joule-heating to prepare transparent conductive electrodes with high-quality graphene. When the concentration of silver nanowires is 3 mg/ml, the FoM of the composite electrode is at a maximum of more than 100. Joule heat welding can effectively and accurately solve the knotting problem of silver nanowires and greatly improve the conductivity of the films. Subsequently, high-quality graphene was grown by chemical vapor deposition method. The graphene layer improved the conductivity and effectively prevented the formation of AgO or Ag2O. Furthermore, the heat dissipation capability of graphene/silver nanowires electrodes is significantly better than that of ITO electrodes.