| abstract |
Disclosed is an organic light emitting device including: a first electrode; a second electrode facing the first electrode; and an organic layer located between the first electrode and the second electrode, the organic layer including an emission layer. The emissive layer includes at least one heterocyclic compound of Formula 1. Heterocyclic compounds can be hosts or delayed fluorescence dopants. Organic light emitting devices including heterocyclic compounds can have low driving voltage, high efficiency, high brightness, and long lifetime. |