Aromatic compound and organic electroluminescence device including the same

An organic electroluminescence device, comprising:

• a first electrode;
• a hole transport region disposed on the first electrode;
• an emission layer disposed on the hole transport region;
• an electron transport region disposed on the emission layer;
• and
• a second electrode disposed on the electron transport region,
• wherein the emission layer comprises an aromatic compound represented by the following Formula 1:
• where Ar1 is a substituted or unsubstituted heteroaryl group having 4 to 30 carbon atoms for forming a ring,
• L is a direct linkage, or a substituted or unsubstituted phenylene group,
• X is a direct linkage, O, S, NRa, CRbRc, SiRdRe, GeRfRg, P(═O)Rh, or P(═S)Ri,
• R1 to R8 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 4 to 30 carbon atoms for forming a ring, and
• Ra to Ri are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 4 to 30 carbon atoms for forming a ring, or form a ring by combining adjacent groups with each other, and
• Rd and Re are not phenyl group concurrently.