COMPOSITION FOR ORGANIC ELECTRIC-FIELD LIGHT-EMITTING ELEMENT, ORGANIC THIN FILM, THE ORGANIC ELECTRIC-FIELD LIGHT EMITTING-ELEMENT, ORGANIC EL DISPLAY, AND ORGANIC EL ILLUMINATION

摘要

PROBLEM TO BE SOLVED: To provide a long-life, organic electric-field light-emitting element having an emitter or luminous layer formed by a wet film forming method. SOLUTION: A composition for an organic electric-field light-emitting element contains two or more sorts of organic electric-field light-emitting element materials including a luminous material and also contains a solvent. The composition satisfies a formula (1): [(saturation solubility of EL material S) / (weight ratio of EL material S)]×[(weight ratio of EL material N) / (saturation solubility of EL material N)]≥2.0. The EL material S is a material of the organic electric-field light-emitting element having a material of the lightest weight out of materials of the composition. The EL material N is a material of the organic electric-field light-emitting element of a material having the heaviest weight out of the materials of the composition. The weight ratio is a ratio of the EL material S to the EL material N in weight. Saturation solubility is a ratio of each material in solubility at 20°C and at one atmosphere to a solvent in the composition. COPYRIGHT: (C)2010,JPO&INPIT