Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device
申请人:SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
公开号:US10263195B2
公开(公告)日:2019-04-16
A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R1, R2, Ar3, and α3). Further, a substituent which makes the band gap (Bg) and the T1 level of a compound in which a bond of the substituent is substituted with hydrogen wide and high is used as each of the substituents in General Formula (G1) (R1, R2, Ar3, and α3).
本发明提供了一种新型物质,利用该物质可提高发光元件的寿命和发射效率。本发明提供了一种具有通式(G1)所示结构的咔唑化合物。需要注意的是,通式(G1)中的每个取代基(R1、R2、Ar3 和 α3)中都使用了能使其键被氢取代的化合物的 HOMO 水平和 LUMO 水平分别变深和变浅的取代基。此外,通式(G1)(R1、R2、Ar3 和 α3)中的每个取代基都使用了能使其键被氢取代的化合物的带隙(Bg)和 T1 电平变宽和变高的取代基。