The invention belongs to the technical field of photo-
electronics, and more specifically relates to a low-roughness and low-square-resistance flexible transparent conductive composite thin film, wherein the thin film adopts a three-layer
composite structure; the lowest bottom layer is provided with a transparent
polymer thin film; the middle layer is provided with a conductive network formed by
metal nanowires; the topmost layer is a provided with a transparent conductive layer which uniformly covers the transparent
polymer thin film and the conductive network; the flexible transparent conductive composite thin film is less than 20-nanometer in average roughness, less than 30-
ohm /
square meter in square resistance, and greater than 80% of light
transmittance within a visible light range; and the transparent conductive thin film can bear bending with
radius of curvature of 2mm. The invention also discloses a preparation method for the flexible transparent conductive composite thin film. The flexible transparent conductive composite thin film provided by the invention has low roughness,
high conductivity, high light
transmittance, simple preparation method and low cost, and is particularly suitable for
flexible display and illumination, a flexible
solar battery and flexible touch equipment.