Organic electroluminescence device and polycyclic compound for organic electroluminescence device

An organic electroluminescence device, comprising:

• a first electrode;
• a second electrode disposed on the first electrode;
• and
• an emission layer disposed between the first electrode and the second electrode and comprising a polycyclic compound represented by Formula 1, wherein
• the polycyclic compound has an external quantum efficiency in a range of about 10% to about 20% at a luminance of about 1,000 cd/m2:
• wherein in Formula 1,
• X is N or —C(R11),
• Y1 and Y2 are each independently —C═O, —C═S, or —S═O,
• R1 to R11 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a nitro group, a carbonyl group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted oxy group, a substituted or unsubstituted silyl group, a substituted or unsubstituted boryl group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or combined with an adjacent group to form a ring, and
• at least one of R1 to R11 is represented by Formula 2 or Formula 3:
• wherein in Formula 2,
• n is 0 or 1,
• W1 is a direct linkage, —B(R29), —C═O, O, S, —SO, —SO2, —N(R30), —P═O, —P(R31), or —Si(R32)(R33),
• wherein in Formula 3,
• Z is —B(R56), —C═O, O, S, —SO, —SO2, —N(R57), —P═O, —P(R58), or —Si(R59)(R60),
• wherein in Formula 2 and Formula 3,
• R21 to R33, and R51 to R60 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a nitro group, a carbonyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted boryl group, a substituted or unsubstituted oxy group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or combined with an adjacent group selected from R1 to R11, R21 to R33, and R51 to R60 to form a ring.

A polycyclic compound represented by Formula 1:

• wherein in Formula 1,
• X is N or —C(R11),
• Y1 and Y2 are each independently —C═O, —C═S, or —S═O,
• R1 to R11 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a nitro group, a carbonyl group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted oxy group, a substituted or unsubstituted silyl group, a substituted or unsubstituted boryl group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or combined with an adjacent group to form a ring, and
• at least one of R1 to R11 is represented by Formula 2 or Formula 3:
• wherein in Formula 2,
• n is 0 or 1,
• W1 is a direct linkage, —B(R29), —C═O, O, S, —SO, —SO2, —N(R30), —P═O, —P(R31), or —Si(R32)(R33),
• wherein in Formula 3,
• Z is —B(R56), —C═O, O, S, —SO, —SO2, —N(R57), —P═O, —P(R58), or —Si(R59)(R60),
• wherein in Formula 2 and Formula 3,
• R21 to R33, and R51 to R60 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a nitro group, a carbonyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted boryl group, a substituted or unsubstituted oxy group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or combined with an adjacent group selected from R1 to R11, R21 to R33, and R51 to R60 to form a ring.