Organic electroluminescence device and polycyclic compound for organic electroluminescence device

An organic electroluminescence device, comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• an emission layer disposed between the first electrode and the second electrode,
• wherein the first electrode and the second electrode each independently include at a least one material selected from the group consisting of Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF/Ca, LiF/Al, Mo, Ti, oxides thereof, compounds thereof, and mixtures thereof;
• wherein the emission layer includes a polycyclic compound represented by Formula 1:
• wherein in Formula 1,
• X1 is NAr2, O, or S,
• Y1 to Y8 are each independently CM1 or a carbon atom bonded to a group represented by Formula 2,
• each M1 is independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or bonded to an adjacent group to form a ring,
• Ar1 and Ar2 are each independently a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms,
• R1 to R5 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or bonded to an adjacent group to form a ring,
• a, b, c, and d are each independently an integer from 0 to 2,
• at least one group represented by Formula 2 is bonded to at least one pair of substituents, the at least one pair of substituents selected from the group consisting of Y1 and Y2, Y3 and Y4, Y5 and Y6, and Y7 and Y8,
• wherein in Formula 2,
• each X2 and each X3 are independently NAr3, O, or S,
• each Ar3 is independently a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms,
• each R6 and each R7 are independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or bonded to an adjacent group to form a ring,
• each e is independently an integer from 0 to 3,
• each f is independently an integer from 0 to 4, and
• * indicates a binding site to a neighboring atom.