ORGANIC ELECTRIC FIELD LIGHT EMITTING ELEMENT AND PRODUCTION THEREFOR

摘要

A composition for an organic electroluminescent device is a composition for forming an organic light emitting layer of an organic electroluminescent device by wet coating process. The composition contains a phosphorescent material, a charge transport material, and a solvent, in which the phosphorescent material and the charge transport material are each an unpolymerized organic compound, and the first oxidation potential of the phosphorescent material E D + , the first reduction potential of the phosphorescent material E D - , the first oxidation potential of the charge transporting material E T + , and the first reduction potential of the charge transporting material E T - satisfy the following condition: E T - + 0.1 ‰ E D - < E T + ‰ E D + - 0.1 or E D - + 0.1 ‰ E T - < E D + ‰ E T + - 0.1