Transparent conductive films with fused networks
Fusing nanowire inks are described that can also comprise a hydrophilic polymer binder, such as a cellulose based binder. The fusing nanowire inks can be deposited onto a substrate surface and dried to drive the fusing process. Transparent conductive films can be formed with desirable properties.
1. A transparent conductive film comprising a substrate and a transparent conductive layer, the transparent conductive layer comprising a fused metal nanostructured network and from about 40 wt % to about 600 wt % of a polysaccharide with the weight percent evaluated relative to the metal weight, wherein the film has a sheet resistance of no more than about 100 ohms/sq and a % TT of at least about 89%.
2. The transparent conductive film of claim 1 wherein the fused metal nanostructured network has a metal loading from about 0.1 mg/m 2 to about 300 mg/m 2 .
3. The transparent conductive film of claim 1 wherein the fused metal nanostructured network has a metal loading from about 1 mg/m 2 to about 150 mg/m 2 .
4. The transparent conductive film of claim 1 wherein the transparent conductive layer comprises from about 50 wt % to about 450 wt % polysaccharide relative to metal weight.
5. The transparent conductive film of claim 1 wherein the polysaccharide comprises a cellulose based polymer.
6. The transparent conductive film of claim 1 wherein the polysaccharide comprises a chitosan based polymer.
7. The transparent conductive film of claim 1 having a sheet resistance of no more than about 95 ohms/sq, a % TT of at least about 90%, wherein the metal nanostructured network comprises silver.
8. The transparent conductive film of claim 7 having a % TT of at least about 92%.
9. The transparent conductive film of claim 1 having a sheet resistance of no more than about 70 ohms/sq.
10. The transparent conductive film of claim 1 wherein the substrate comprises a polymer film supporting the transparent conductive layer.
11. The transparent conductive film of claim 1 wherein the fused metal nanostructured network comprises silver and having haze of no more than about 1.0%.
12. The transparent conductive film of claim 11 wherein the fused metal nanostructured network further comprises gold or platinum.
13. The transparent conductive film of claim 1 further comprising a polymer overcoat.
14. The transparent conductive film of claim 13 wherein the polymer overcoat comprises a UV crosslinked polymer.
15. The transparent conductive film of claim 13 wherein the polymer overcoat comprises polyurethanes, acrylic resins, acrylic copolymers, polyethers, polyesters, epoxy containing polymers, or mixtures thereof.
16. The transparent conductive film of claim 13 wherein the polymer overcoat comprises a polysiloxane.
17. The transparent conductive film of claim 13 wherein the polymer overcoat has a thickness from about 50 nm to about 1 micron.
18. The transparent conductive film of claim 13 having a sheet resistance of no more than about 70 ohms/sq.
19. The transparent conductive film of claim 18 having a haze of no more than about 0.8%.
20. The transparent conductive film of claim 19 having a % TT of at least about 92%.