Organic EL element and method for producing same

摘要

The present invention is to provide a method of favorably forming an organic EL device with the inverted structure by the wet process. On that account, an organic EL device includes a cathode, an electron injection layer, a light emitting layer, a hole transport layer, a hole injection layer, an anode are formed in this order on a substrate. The electron injection layer is formed by applying ink between banks and drying the ink. The ink is formed by dissolving a polymer compound having an organic phosphine oxide skeleton in an alcohol solvent. The light emitting layer is formed by applying ink between components of the bank and the drying the ink. The ink is formed by dissolving material for light emitting layer such as polyphenylene vinylene (PPV) derivative or polyfluorene derivative in a nonpolar solvent.

主权项

1. A method of manufacturing an organic EL device having a substrate, and a cathode, a plurality of organic layers and an anode layered on the substrate in an order as stated, the method comprising:
a first step of forming, by a wet process, a first organic layer including a polymer compound having an organic phosphine oxide skeleton; and a second step of forming, on the first organic layer, a second organic layer by a wet process using a solution including organic material and a solvent, the solvent being at least one selected from the group consisting of an aromatic solvent including a benzene ring and an aliphatic solvent including alkyl or alkene, wherein the polymer compound is soluble in an alcohol solvent and insoluble in the solvent used in the second step, and is represented by the following structural formula: where each of Ar1 and Ar2 is a monovalent aromatic chromophore, each of R1 and R2 is an aliphatic substituent, and n is an integer of 2 or more.