申请人:Sumitomo Chemical Company, Limited
公开号:US10964902B2
公开(公告)日:2021-03-30
A method of producing a film having excellent external quantum efficiency when used in a light emitting layer of a light emitting device is provided. A method of film production includes preparing an ink containing a specific metal complex, storing the ink for 3 days or more under light shielding, and forming a film by using the stored ink. The total content of metal complexes having a molecular weight larger by 16, 32 or 48 than that of the specific metal complex according to an area percentage value determined by liquid chromatography is 0.6 or less when the content of the specific metal complex is taken as 100.
本发明提供了一种生产薄膜的方法,该薄膜用于发光器件的发光层时具有极佳的外部量子效率。薄膜的生产方法包括制备含有特定金属络合物的墨水,在遮光条件下将墨水储存 3 天或更长时间,然后使用储存的墨水形成薄膜。根据液相色谱法测定的面积百分比值,分子量比特定金属络合物大 16、32 或 48 倍的金属络合物的总含量在特定金属络合物含量为 100 时为 0.6 或以下。