A light-emitting element emitting phosphorescence and having high emission efficiency, in which a property of injecting holes to a light-emitting layer is increased, is provided. The light-emitting layer of the light-emitting element includes a first organic compound represented by the following general formula (G1) and a second organic compound which is a phosphorescent compound. The difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is lower than or equal to 0.3 eV.
本发明提供了一种发射
磷光并具有高发射效率的发光元件,该元件增加了向发光层注入空穴的特性。该发光元件的发光层包括由以下通式(G1)表示的第一种有机化合物和第二种有机化合物,后者是一种
磷光化合物。第一种有机化合物的 HOMO
水平与第二种有机化合物的 HOMO
水平之差小于或等于 0.3 eV。