Highly Flexible MWCNTs-AgNWs Composite Electrode for Durable Organic Light Emitting Devices

The quality of flexible electrode shows huge impact on the development of wearable organic light emitting devices (OLEDs). It is primarily come from the conductive attenuation and interface stripping of metallic electrode under continuous deformation. Inspired by the flexible structure of human vertebrae, we added the multi-walled carbon nanotubes (MWCNTs) into silver nanowires (AgNWs) network to act as stable and protective filler. During continuous deformation, the entwisted MWCNTs can prevent the slippage of adjacent AgNWs and decentralize stress to keep the intact of conductive network. The composite film has been applied as back electrode to replace the thick metallic electrode in skin-attachable OLEDs and the overall mechanical stability of the device has been greatly improved.