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

摘要

PROBLEM TO BE SOLVED: To manufacture an organic electroluminescent light-emitting element having a long drive life and a high current efficiency, by a wet deposition method.SOLUTION: A method of producing a composition for organic electroluminescent light-emitting element has a filtering step of filtering a liquid containing a light-emitting layer material having a molecular weight of 100-10000, a charge transport material having a molecular weight of 400-10000, and a solvent. The composition is obtained after a step of passing the liquid after the filtering step through a closed vessel filled with an inert gas for 8 hours or more, and is used for wet deposition of the organic layer of an organic electroluminescent light-emitting element.SELECTED DRAWING: Figure 1