Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device

摘要

Provided is a light-emitting element with high emission efficiency. The light-emitting element including a first electrode, a second electrode, and a layer containing an organic compound between the first electrode and the second electrode. The layer containing the organic compound includes a light-emitting layer at least containing a first organic compound, a second organic compound, and a fluorescent substance. The first organic compound has an electron-transport property. The second organic compound has a hole-transport property. The second organic compound has a triarylamine skeleton. At least one of three aryl groups in the triarylamine skeleton is a group including a p-biphenyl skeleton.

主权项

1. A light-emitting device comprising:
a light-emitting layer between a pair of electrodes, the light-emitting layer comprising a fluorescent substance, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property, wherein: the second organic compound is represented by formula (G1): Ar1 represents any one of a substituted or unsubstituted p-biphenyl group, a substituted or unsubstituted fluorenyl group, and a substituted or unsubstituted 4-(9-phenyl-9H-carbazol-3-yl)phenyl group; and Ar2 and Ar3 each independently represent an aryl group having 6 to 50 carbon atoms or a heteroaryl group having 1 to 50 carbon atoms.