Polycyclic compound and organic electroluminescence device including the same

An organic electroluminescence device, comprising:

• a first electrode;
• a hole transport region provided on the first electrode;
• an emission layer provided on the hole transport region;
• an electron transport region provided on the emission layer;
• and
• a second electrode provided on the electron transport region,
• wherein the emission layer comprises a polycyclic compound represented by the following Formula 1:
• in Formula 1, X is O, SiR′R″, S, or BAr1,
• Ar1 is substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring,
• R′ and R″ are each independently substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring,
• Ra to Re, and R1 to R8 are each independently hydrogen atom, deuterium atom, substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring,
• when X is BAr1, at least one of R1 to R8 is represented by one of the following Formulae 2 to 4,
• when X is O, SiR′R″, or S, at least one of R1 to R8 is represented by the following Formula 3 or 4:
• in Formulae 2, Y is a direct linkage, CZ1Z2, NZ3, O, or S,
• Z1 to Z3, and R9 to R44 are each independently hydrogen atom, deuterium atom, halogen atom, cyano group, substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring,
• optionally, R25 and R26, R43 and R44, and Z1 and Z2 each two groups independently combine with each other to form a ring, and
• L1 to L3 are each independently a direct linkage, or substituted or unsubstituted arylene group having 6 to 30 carbon atoms for forming a ring.

An organic electroluminescence device, comprising:

• a first electrode;
• a hole transport region provided on the first electrode;
• an emission layer provided on the hole transport region;
• an electron transport region provided on the emission layer;
• and
• a second electrode provided on the electron transport region,
• wherein the emission layer comprises a polycyclic compound represented by the following Formula 1:
• in Formula 1, X is O, SiR′R″, S, or BAr1,
• Ar1 is substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring,
• R′ and R″ are each independently substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring,
• Ra to Re, and R1 to R8 are each independently hydrogen atom, deuterium atom, substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, at least one of R1 to R8 is represented by the following Formula 2:
• when X is BAr1 in Formulae 2, Y is a direct linkage, CZ1Z2, NZ3, SiZ4Z5, O, S or CZ6Z7 of which Z6 and Z7 combine with each other through Si to form a ring,
• when X is O, SiR′R″, or S, Y is SiZ4Z5, or CZ6Z7 of which Z6 and Z7 combine with each other through Si to form a ring,
• Z1 to Z5, and R9 to R16 are each independently hydrogen atom, deuterium atom, halogen atom, cyano group, substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring,
• Z6 and Z7 are each independently substituted or unsubstituted phenyl group,
• optionally, Z1 and Z2, and Z4 and Z5 each two groups independently combine with each other to form a ring, and
• L1 is a direct linkage, or substituted or unsubstituted arylene group having 6 to 30 carbon atoms for forming a ring.