Transparent Conductor Grid and Nanostructure for Low Sheet Resistance

The patent combines metal nanowires (silver, aluminum, or copper) with transparent conducting oxides (such as ITO, IZO, or ZnO) to create a composite transparent conductor. This composite structure achieves low sheet resistance through the metal nanowire network while maintaining optical transparency through the TCO matrix, thereby resolving the contradiction between electrical conductivity and optical transparency. The composite material prevents leakage current and shorting by providing a more stable and controllable conductive pathway.

The patent applies different materials with specific properties to different regions or functions within the transparent conductor structure. Metal nanowires are used primarily for electrical conductivity where low resistance is needed, while TCO materials are used for optical transparency and surface coverage. This local differentiation of material properties allows the conductor to achieve low sheet resistance without compromising optical performance or mechanical stability.

The metal nanowire-TCO composite structure allows independent optimization of electrical and surface properties. The TCO matrix provides a smooth, planar surface that prevents leakage current, while the embedded metal nanowires provide the low-resistance conductive pathways. This decoupling of surface quality and electrical performance resolves the contradiction between reducing sheet resistance and maintaining surface smoothness.

The TCO matrix acts as an intermediary between the metal nanowires and the substrate, providing a smooth surface interface that prevents direct contact between conductive elements and the substrate, thereby eliminating leakage current paths. Simultaneously, the TCO matrix electrically connects the metal nanowires to form a continuous conductive network with low sheet resistance.