Method for forming multi-layer cathode in organic light-emitting devices

• Main Author: SUNG CHAOIN
• Format: Patent
• Language: English
• Published: 21.06.2007
• Subjects: ADVERTISING; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CRYPTOGRAPHY; DIFFUSION TREATMENT OF METALLIC MATERIAL; DISPLAY; DISPLAYING; EDUCATION; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LABELS OR NAME-PLATES; METALLURGY; PERFORMING OPERATIONS; PHYSICS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SEALS; SEMICONDUCTOR DEVICES; SIGNS; SPRAYING OR ATOMISING IN GENERAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

A method for manufacturing an organic light-emitting device includes forming an anode over a substrate, at least one organic light-emitting layer over the anode, a buffer layer over the organic light emitting layer, and a cathode over the buffer layer. The cathode is formed of first, second and third cathode layers. The first cathode layer is formed of a conductive material. A second cathode layer of electron transport material is formed over the first cathode layer and a third cathode layer of conductive material is formed over the second cathode layer.