Organic el light-emitting element and manufacturing method thereof

An organic electroluminescent light-emitting element comprising:

• a substrate,
• a first electrode provided on a surface of the substrate,
• an insulation bank formed to surround at least part of the first electrode,
• one or more organic layers formed on the first electrode surrounded by the insulation bank, and
• a second electrode formed on the organic layer,
• wherein the insulation bank is formed by a material having a hydrophilic property, and a contact angle of a surface of the insulation bank to water is 15° or more and 60° or less, and the insulation bank has a forward tapered shape or a sidewall of the insulation bank is formed such as to be substantially perpendicular to the first electrode,
• each of the one or more organic layers is a coated-type organic layer formed of an oligomer of an organic material, and the one or more organic layers comprise a light-emitting layer,
• the oligomer of the organic material for the light-emitting layer is a compound obtained by a polymerization of a monomer, the monomer comprising a structural unit represented by a general formula of —[Y]—, wherein Y comprises a skeleton selected from a group consisting of a triarylamine skeleton, an oxadiazole skeleton, a triazole skeleton, a silole skeleton, a styrylarylene skeleton, a pyrazoloquinoline skeleton, an oligothiophene skeleton, a rylene skeleton, a perinone skeleton, a vinyl carobazole skeleton, a tetraphenylethylene skeleton, a coumarin skeleton, a rubrene skeleton, a quinacridone skeleton, a squarylium skeleton, a porphyrin skeleton, and a pyrazoline skeleton, and
• the oligomer has a molecular weight of 300 or more and 5000 or less.