METHOD OF PRODUCING COMPOSITION FOR USE IN ORGANIC ELECTROLUMINESCENT ELEMENT, COMPOSITION FOR USE IN ORGANIC ELECTROLUMINESCENT ELEMENT, METHOD OF PRODUCING ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC EL DISPLAY D

摘要

Provided is a method for producing an organic electroluminescent element that exhibits a high current efficiency and long service life by means of a wet deposition method. Also disclosed is a method of producing a composition for use in an organic electroluminescent element, said method involving a filtration step for filtering a solution that contains a solvent and an organic electroluminescent element material. The composition is obtained after undergoing an aging step for aging the solution from the filtration step for at least eight hours, and can be used to form the organic layer of an organic electroluminescent element by means of a wet deposition method.