Flexible Carbon‐Based 3D Conductive Network Structure Blade‐Coated on Poly(ethylene terephthalate) Substrate for Light‐Emitting Electronic Devices

Herein, the blade‐coated conductive ink on poly(ethylene terephthalate) substrate with unique features is demonstrated, aiming at the fabrication of flexible light‐emitting electronic devices. The inks are prepared by combining carbon‐based fillers and epoxy resin to achieve a high‐performance 3D conductive channel network with low resistance. The carbon‐based channels in the conductive composites withstand 2000 bending‐releasing cycles (bending radius of 10 mm); excellent resistance reliability with the value of R/R ₀ is 1.059. Moreover, carbon‐based epoxy composites also possess a mechanical fastness under ultrasonic treatment and chemical durability to various organic solvents and have an excellent performance in the application of light‐emitting electronic devices. Here, this work provides a new solution for the development of high‐efficiency, low‐cost, large‐scale production of flexible electronics.