COATING COMPOSITIONS FOR FORMING NANOCOMPOSITE FILMS
Described herein are coating compositions comprising metal nanostructures and one or more conductive polymers, and nanocomposite films formed thereof.
1 . A coating composition comprising:
a plurality of metal nanostructures;
one or more conductive polymers; and
a liquid carrier.
2 . The coating composition of claim 1 wherein the metal nanostructures include silver nanowires.
3 . The coating composition of claim 1 wherein the one or more conductive polymers are PEDOT:PSS.
4 . The coating composition of claim 1 wherein the liquid carrier is an aqueous solvent system.
5 . The coating composition of claim 1 wherein the liquid carrier is non-aqueous and includes one or more alcohols.
6 . The coating composition of claim 1 wherein the plurality of metal nanostructures are of 0.1%-4%, 0.1%-1.5%, 0.1%-1%, or 1%-4% by weight of the coating composition.
7 . The coating composition of claim 1 wherein the one or more conductive polymers are of 0.1%-1%, or 1%-3%, or 2%-5%, or 3%-10%, or 8%-10% by weight of the coating composition.
8 . The coating composition of claim 1 , wherein the plurality of metal nanostructures and the one or more conductive polymers are in a weight ratio of 1:1, 1:2, 1:3, 1:4, or 1:5.
9 . The coating composition of claim 1 further comprising a plurality of light-scattering particles.
10 . A device comprising:
a composite film having:
a conductive film of one or more conductive polymers; and
a plurality of metal nanostructures;
wherein the plurality of metal nanostructures are randomly distributed in the one or more conductive polymers.
11 . The device of claim 10 further comprising:
a first electrode;
a second electrode; and
an organic light-emitting layer disposed between the first electrode and the second electrode,
wherein the composite film is a charge injection layer disposed between the organic light-emitting layer and one of the first electrode and the second electrode.
12 . The device of claim 10 wherein the composite film comprises silver nanowires embedded in PEDOT:PSS.
13 . The device of claim 10 wherein the composite film has a sheet resistance of less than 200 ohms/sq and a light transmission higher than 85%.
14 . A method comprising:
providing a coating composition including a plurality of metal nanostructures, one or more conductive polymers, and a liquid carrier;
forming a single coat of the coating composition on a substrate; and
forming a composite film including the plurality of metal nanostructures embedded in the conductive polymer by allowing the single coat to cure.
15 . The method of claim 14 wherein forming the single coat comprises spin-coating or direct printing the coating composition on the substrate.
16 . The method of claim 14 wherein the coating composition comprises silver nanostructures and PEDOT:PSS.