MANUFACTURING METHOD OF COMPOSITION FOR ORGANIC ELECTRONIC ELEMENT, COMPOSITION FOR ORGANIC ELECTRONIC ELEMENT, MANUFACTURING METHOD OF ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC EL DISPLAY DEVICE, AND ORGANIC EL ILLUMINATION

摘要

PROBLEM TO BE SOLVED: To manufacture an organic electroluminescent (EL) element that has a long driving life and high current efficiency and drive lifetime by a wet-type film forming method.

SOLUTION: The manufacturing method of composition for organic EL element comprises: a filtration process for filtering solution that includes an organic EL element material and a solvent. The composition is obtained after a process step in which the solution obtained after the filtration step is kept for ≤8 h, and is used for wet-type film forming of the organic layer of the organic EL element.

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