Organic electroluminescence element, production method thereof, organic el display device, organic el lighting, and apparatus for producing organic electroluminescence element

A method for producing an organic electroluminescence element having an organic layer between an anode and a cathode, wherein

• a step of forming at least one layer contained in the organic layer comprises:
• a wet film-forming step by using an organic electroluminescence element composition containing an organic electroluminescence element material and a solvent;
• and a film-drying step of drying the formed film, and
• the wet film-forming step is performed in an environment having a nitrogen oxide concentration of 3.1 μg/m3 or less and an oxygen concentration of 18 to 22 vol %.

A method for producing an organic electroluminescence element having an organic layer between an anode and a cathode, wherein

• a step of forming at least one layer contained in the organic layer comprises:
• a wet film-forming step by using an organic electroluminescence element composition containing an organic electroluminescence element material and a solvent;
• and a film-drying step of drying the formed film, and
• the wet film-forming step is performed in an environment having an oxygen concentration of 18 to 22 vol % and satisfying at least two of the following (1) to (3):
• (1) a carbon dioxide concentration is 0.7 g/m3 or less,
• (2) a sulfur oxide concentration is 2.2 μg/m3 or less, and
• (3) a nitrogen oxide concentration is 3.1 μg/m3 or less.

A method for producing an organic electroluminescence element having an organic layer between an anode and a cathode, wherein

• a step of forming at least one layer contained in the organic layer comprises:
• a wet film-forming step by using an organic electroluminescence element composition containing an organic electroluminescence element material and a solvent;
• and a film-drying step of drying the formed film, and
• the wet film-forming step is performed in an environment having an oxygen concentration of 18 to 22 vol % and an absolute humidity of 15 g/kg (DA) or less, and satisfying at least one of the following (2) and (3):
• (2) a sulfur oxide concentration is 2.2 μg/m3 or less, and
• (3) a nitrogen oxide concentration is 3.1 μg/m3 or less.