Fabrication of three-dimensional sandwich-like silver nanowire network coated bilayer graphene nanostructures for flexible display.

Abstract

High-quality transparent conductive film is very important for flexible display, especially with super high transmittance, good conductivity, and excellent stability. In this work, the synthesis and characterization of a three-dimensional sandwich-like structure, including a silver nanowire network and PEDOT:PSS coated by two layers of graphene, a transparent conductive layer named GAPG, were demonstrated. The transparent conductive layer made full use of the plasma effect of silver nanowires and the properties of graphene, including high light transmittance, metalloid conductivity, and excellent mechanical recovery. The PEDOT:PSS enabled silver nanowires and double graphene to form a solid whole, which greatly improved the stability of the membrane. Its sheet resistance was 48.3Ω/◻, and its electron mobility was 14,663cm2/(V⋅s), which were superior to single-layer graphene and other transparent conductive layers. Compared with other flexible conductive materials, GAPG had more advantages in mechanical properties, a wider viewing angle, excellent bending recovery, and more stable performance. When the film was bent, its light transmittance was only ±0.3Ω, and the change rate was less than ±0.2%. The scattering of silver nanowires and PEDOT:PSS particles made the problem of display angle fully solved. So GAPG is a potential flexible conductive material, which can be used in electronic paper and other flexible devices to greatly improve their performance.