Methods of fabricating organic electronic devices
View Patent ↗Methods for fabrication of organic electronic devices are described.
1. A method of fabricating a device having multiple organic layers, comprising:
providing a first organic layer having a first phase transition temperature;
contact printing a second organic layer on the first organic layer wherein the first organic layer is maintained at a temperature below the first phase transition temperature during said contact printing; and
contact printing a third layer on the second organic layer wherein the temperature of the first and second organic layers are maintained at a temperature below the lower of their phase transition temperatures during said contact printing of the third layer.
2. The method of claim 1 , wherein the phase transition temperature is the average transition temperature of a blend of polymers, each having distinct phase transition temperatures.
3. The method of claim 1 , wherein at least one of the organic layers is swollen by contact with a plasticizing solvent and the phase transition temperature of the swollen layer is determined according to the Hoy modification to the Fox-Flory equation.
4. The method of claim 1 , wherein the phase transition temperature is a glass transition temperature.
5. The method of claim 1 , wherein the contact printing comprises screen printing, flexographic printing, gravure printing, lithographic printing, rubber stamping, laminating, or decal transferring, or a combination thereof.
6. The method of claim 1 , wherein at least one of the organic layers comprises a charge transport layer or a photoactive layer.
7. The method of claim 1 , wherein at least one of the organic layers comprises a hole transport polymer selected from polyvinylcarbazole, (phenylmethyl)polysilane, poly(dioxythiophenes), polyanilines, or polypyrroles, or copolymers or mixtures thereof.
8. The method of claim 1 , wherein at least one of the organic layers comprises an electron transport polymer selected from poly(oxadiazoles), polytriazoles, polypyridines, or polypyrimidines, or copolymers or mixtures thereof.
9. The method of claim 1 , wherein at least one of the organic layers comprises polyethylene terephthalate, polyethylene naphthalate, polyimide, polycarbonate, polyamide, polyarylate, and polyethersulfone films.
10. The method of claim 1 , wherein the method further comprises contact printing a getter material over the layers.
11. The method of claim 1 , wherein the first organic layer is applied by contact printing.
12. The method of claim 11 , wherein the first and second organic layers are only printed where light will emit from said device.