abstract |
Provided is a heterocyclic compound represented by Formula 1 below, and an organic electroluminescence device including the same in an emission layer. In Formula 1, X is a direct linkage or CR 2 R 3 , Z 1 to Z 8 are each independently CR 4 or N, at least two of Z 1 , Z 3 , Z 6 and Z 8 are each independently CR 5 , and R 5 is represented by Formula 2 or Formula 3 below. |