Multi-layer device including a light-transmissive electrode layer comprising a porous mesh or porous spheres
A multi-laver device and its method of manufacture are disclosed. The multi-layer device comprises a first electrode layer, a first repair layer, a functional layer, and a second electrode layer. The first repair layer comprises a conductive hydrogel film or conductive hydrogel beads, the conductive hydrogel film or the conductive hydrogel beads comprising conductive filler particles dispersed in a cross-linked polymer. The repair layer protects the multi-layer device from electrical short circuits. A multilayer device is also disclosed including a light-transmissive electrode layer comprising a porous mesh or porous spheres.
1. A multi-layer device including a light-transmissive electrode layer and a functional layer, the light-transmissive electrode layer comprising a dry porous mesh, the dry porous mesh comprising carbon nanotubes or carbon nanowires, and a cross-linked polysaccharide formed by a reaction of a cross-linkable polysaccharide and a cross-linking agent that is a salt of a divalent or trivalent metal,
wherein the light-transmissive electrode layer transmits 60 percent or more of incident visible light such that images and colors present in an underlying layer of the multi-layer device, are visible to an observer looking through the light-transmissive electrode layer, and
wherein the functional layer is an electro-optic material layer comprising a binder and an electrophoretic medium encapsulated in microcapsules, or
wherein the functional layer comprises liquid crystals, or
wherein the multi-layer device is a flexible organic electro-optic device or light emitting diode, and the functional layer comprises a component selected from the group consisting of an insulator, a capacitor, a resistor, an n-type transistor, a p-type transistor, a polymer, a small molecule, and combinations thereof, that can transport electrons or holes.
2. The multi-layer device of claim 1 , wherein the divalent or trivalent metal is selected from the group consisting of calcium, magnesium, strontium, barium, zinc, copper, cobalt, nickel, gallium, aluminum, iron, and mixtures thereof.
3. The multi-layer device of claim 1 , wherein the cross-linked polysaccharide is selected from the group consisting of a cross-linked chitosan, a cross-linked alginate, and mixtures thereof.
4. The multi-layer device of claim 3 , wherein the cross-linked chitosan and the cross-linked alginate are formed by a reaction between a chitosan anion or an alginate anion with a calcium salt.
5. The multi-layer device of claim 1 , wherein the dry porous mesh of the light-transmissive electrode layer is formed by a fast addition of an aerated aqueous mixture of a polysaccharide anion and carbon nanotubes or carbon nanowires into an aqueous solution of a salt of a divalent or trivalent metal.
6. The multi-layer device of claim 5 , wherein the polysaccharide is an alginate and the divalent metal is calcium.