JPWO2021101885A5 - - Google Patents

Claims (25)

A transparent conductive film comprising a transparent polymeric substrate, a sparse metal conductive layer supported by the substrate, and a polymer overcoat adjacent the sparse metal conductive layer, the transparent conductive film comprising: has a visible light transmission of at least about 88% and a sheet resistance of about 120 ohms/sq or less, and the polymer overcoat comprises a polymer and about 0.01% to about 20% by weight of noble metal ions. Transparent conductive film. The transparent conductive film of claim 1, wherein the overcoat has an average thickness of about 5 nm to about 250 nm. The polymer of the overcoat may be polysiloxane, polysilsesquioxane, polyurethane, acrylic resin, acrylic copolymer, cellulose ether and/or ester, nitrocellulose, other water-insoluble structural polysaccharides, polyether, polyester, polystyrene, Transparent conductive film according to claim 1 or 2, comprising polyimides, fluoropolymers, styrene-acrylate copolymers, styrene-butadiene copolymers, acrylonitrile butadiene styrene copolymers, polysulfides, epoxy-containing polymers, copolymers thereof and mixtures thereof. 4. The transparent conductive film of any one of claims 1-3, wherein the polymer overcoat comprises from about 0.1% to about 9% by weight of a vanadium (+5) stabilizing composition. the polymeric overcoat has an average thickness of about 10 nm to about 125 nm, the polymer of the overcoat comprises polyacrylate, and the polymeric overcoat comprises ammonium metavanadate (NH ₄ VO ₃ ), tetravanadate. Butylammonium (NBu ₄ VO ₃ ), potassium metavanadate (KVO ₃ ), sodium metavanadate (NaVO ₃ ), sodium orthovanadate (Na ₃ VO ₄ ), vanadium oxytripropoxide, vanadium oxytriethoxide, vanadium oxy 5. A vanadium (+5) stabilizing composition according to any one of claims 1 to 4, comprising from about 0.5% to about 5% by weight of a vanadium(+5) stabilizing composition comprising triisopropoxide, vanadium oxytributoxide, or a mixture thereof. transparent conductive film. A transparent conductive film according to any one of claims 1 to 5, wherein the sparse metal conductive structure comprises a fused metal nanostructured network comprising silver, and the noble metal ions comprise silver ions. The transparent conductive film of any one of claims 1 to 6, wherein the transparent conductive film has a transmittance of at least about 90% and a sheet resistance of about 90 ohms/sq or less. The polymer overcoat may include silver tetrafluoroborate (AgBF ₄ ), silver hexafluorophosphate (AgPF ₆ ), silver perchlorate (AgClO ₄ ), silver hexafluoroantimonate (AgSbF ₆ ), silver trifluoroacetate ( CF ₃ COO), silver hexafluorobutyrate (AgC ₄ HF ₆ O ₂ ), silver methylsulfonate (AgCH ₃ SO ₃ ), silver tolylsulfonate (AgCH ₃ C ₆ H ₄ SO ₃ ) or mixtures thereof. The transparent conductive film of any one of claims 1 to 7, comprising from about 0.25% to about 12% by weight of silver ions. A transparent conductive film according to any one of claims 1 to 8, wherein the sparse metal conductive layer is patterned. A method for reducing the sheet resistance of a transparent conductive film comprising a substrate, a transparent conductive layer comprising a fused metal nanowire network and a polymer polyol binder, and a polymer coating having an average thickness of from about 5 nm to about 250 nm. There it is,
A method comprising heating the transparent conductive sheet to a temperature of at least about 55° C. for at least about 10 minutes to reduce sheet resistance by at least about 5%. 11. The method of claim 10, wherein during the heating step, the transparent conductive sheet is on a roll, the polymer coating is an overcoat, and the overcoat is covered by a release layer. 12. A method according to claim 10 or 11, wherein the heating step is carried out with a relative humidity adjusted to at least about 60%. the heating is carried out at a temperature of about 60° C. to about 100° C. for about 20 minutes to about 50 hours at a relative humidity of at least about 60%, and the transparent conductive film comprises an optically clear adhesive. 12. The method according to claim 10 or 11, wherein no. 14. The fused metal nanostructured network comprises silver and the film has a sheet resistance of 120 ohms/sq or less and a visible light transmission of at least about 88%. the method of. Prior to application of the polymeric overcoat, the substrate having a coating of solvent, metal nanowires, and metal ions is heated to a temperature of about 45° C. to about 130° C. for at least about 2 minutes to dry the coating, and 15. The method of any one of claims 10-14, further comprising forming a fused metal nanostructured network. 16. The method of claim 15, wherein the coating comprises a vanadium (+5) stabilizing composition and silver ions. the polymer overcoat has an average thickness of about 20 nm to about 125 nm, the polymer of the polymer overcoat comprises polyacrylate, and the polymer overcoat has an average thickness of about 0.5% to about 5% by weight. A method according to any one of claims 10 to 16, comprising a vanadium (+5) stabilizing composition. 18. The method of claim 17, wherein the polymer overcoat comprises about 0.1% to about 20% by weight noble metal ions. 19. The fused metal nanostructured network comprises silver and the polymer overcoat comprises polymer and about 0.25% to about 15% silver ions by weight. Method. A transparent conductive film comprising a substrate, a transparent conductive layer comprising a fused metal nanostructured network, and a polymeric overcoat, the transparent conductive film having a transmittance of at least about 88% and a transmittance of about 120 ohms. /sq or less, said transparent conductive film being modified by processing with heat and optionally humidity for at least about 10 minutes to reduce said sheet resistance by at least about 5%. Transparent conductive film. 21. The transparent conductive film of claim 20, wherein the polymer overcoat and/or undercoat comprises metal ions. 22. The transparent conductive film of claim 21, wherein the metal ions include silver ions at a concentration of about 0.01% to about 20% by weight. 23. The transparent conductive film of claim 21 or 22, wherein the metal ion comprises vanadium(+5) at a concentration of about 0.5% to about 5% by weight. the fused metal nanostructured network comprises silver, and the processing includes heating at a temperature of about 60° C. to about 100° C. at a relative humidity of at least about 60%, wherein the transparent conductive film is optically transparent. The transparent conductive film according to claim 20, which does not contain an adhesive. 25. The overcoat of claim 24, wherein the overcoat has an average thickness of about 5 nm to about 250 nm and comprises crosslinked polyacrylate and vanadium (+5) ions at a concentration of about 0.5% to about 5% by weight. Transparent conductive film.