Coatings and processing of transparent conductive films for stabilization of sparse metal conductive layers
AssigneeC3 Nano, Inc.
InventorsXiqiang Yang, Ajay Virkar
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Abstract
Transparent conductive films comprising sparse metal conductive layers are processed after coating with an overcoat to lower the sheet resistance of the film. The sparse metal conductive layer can comprise a fused metal nanostructured network. A coating, such as a polymer overcoat or a polymer undercoat can noble metal ions that can further reduce the sheet resistance with the application of heat and optionally humidity. In particular, silver ions in a coating are demonstrated to provide important stabilization of sparse metal conductive layers, whether or not fused, upon the application of heat and humidity. A coating can further comprise a metal salt stabilization composition.
Claims9
A transparent conductive film comprising a transparent polymer substrate, a sparse metal conductive layer supported by the substrate, and a polymer overcoat adjacent the sparse metal conductive layer, wherein the transparent conductive film has a transmittance of visible light of at least about 88% and a sheet resistance of no more than about 120 ohm/sq and wherein the polymer overcoat comprise polymer and from about 0.01 wt % to about 20 wt % noble metal ions wherein the noble metal ions comprise ions of silver, gold, platinum, indium, osmium, ruthenium or rhodium.
Dependencies are inferred from the claim text.