Organic compounds and organic light-emitting device comprising the same

An organic light emitting device comprising:

• a first electrode;
• a second electrode opposite to the first electrode;
• and
• an organic layer interposed between the first electrode and the second electrode,
• wherein the organic layer includes a light emitting layer including a host and a dopant;
• and
• the host includes at least one type of organic compound represented by the following [Formula 1]:
• in [Formula 1],
• X1 to X3 are the same as or different from each other and each independently N or CR, and at least one of X1 to X3 is N;
• L1 to L3 are the same as or different from each other, and each independently a single bond, or any one selected from substituted or unsubstituted C6-C30 arylene, substituted or unsubstituted C2-C30 heteroarylene, and substituted or unsubstituted divalent cyclic groups in which a C3-C24 aliphatic ring and a C5-C24 aromatic ring are fused together;
• R and R1 to R3 are the same as or different from each other, and each independently any one selected from hydrogen, deuterium, tritium, substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C1-C30 haloalkyl, substituted or unsubstituted C2-C30 alkynyl, substituted or unsubstituted C2-C30 alkenyl, substituted or unsubstituted C6-C50 aryl, substituted or unsubstituted C3-C50 cycloalkyl, substituted or unsubstituted C2-C50 heterocycloalkyl, substituted or unsubstituted C2-C50 heteroaryl, substituted or unsubstituted cyclic groups in which a C3-C30 aliphatic ring and a C5-C30 aromatic ring are fused together, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C6-C30 aryloxy, substituted or unsubstituted C1-C30 alkylthioxy, substituted or unsubstituted C5-C30 arylthioxy, substituted or unsubstituted amine, substituted or unsubstituted silyl, substituted or unsubstituted germanium, nitro, cyano and halogen;
• however, at least one of R1s of [Formula 1] is [Structural Formula 1],
• in [Structural Formula 1],
• ‘*’ means a bonding site linked to L1 of [Formula 1];
• X4 to X7 are the same as or different from each other and each independently N or CR7, and at least one of X1 to X4 is N;
• L4s are the same as or different from each other, and each independently a single bond, or any one selected from substituted or unsubstituted C6-C30 arylene, substituted or unsubstituted C2-C30 heteroarylene, and substituted or unsubstituted divalent cyclic groups in which a C3-C24 aliphatic ring and a C5-C24 aromatic ring are fused together;
• R7s are the same as or different from each other, and each independently any one selected from hydrogen, deuterium, tritium, substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C1-C30 haloalkyl, substituted or unsubstituted C2-C30 alkynyl, substituted or unsubstituted C2-C30 alkenyl, substituted or unsubstituted C6-C50 aryl, substituted or unsubstituted C3-C50 cycloalkyl, substituted or unsubstituted C2-C50 heterocycloalkyl, substituted or unsubstituted C2-C50 heteroaryl, substituted or unsubstituted cyclic groups in which a C3-C30 aliphatic ring and a C5-C30 aromatic ring are fused together, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C6-C30 aryloxy, substituted or unsubstituted C1-C30 alkylthioxy, substituted or unsubstituted C5-C30 arylthioxy, substituted or unsubstituted amine, substituted or unsubstituted silyl, substituted or unsubstituted germanium, nitro, cyano and halogen;
• R4 to R6 are the same as or different from each other, and each independently any one selected from hydrogen, deuterium, tritium, substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C1-C30 haloalkyl, substituted or unsubstituted C2-C30 alkynyl, substituted or unsubstituted C2-C30 alkenyl, substituted or unsubstituted C6-C50 aryl, substituted or unsubstituted C3-C50 cycloalkyl, substituted or unsubstituted C2-C50 heterocycloalkyl, substituted or unsubstituted C2-C50 heteroaryl, and substituted or unsubstituted cyclic groups in which a C3-C30 aliphatic ring and a C5-C30 aromatic ring are fused together;
• n1 to n3 are each independently an integer of 1 to 3, and when they are integers of 2 or greater, R1s to R3s are the same as or different from each other;
• n4 is an integer of 4, and R4s are the same as or different from each other;
• m1 to m4 are each independently an integer of 1 to 3, and when they are integers of 2 or greater, Lis to L4s are the same as or different from each other;
• the plurality of adjacent R7s are optionally linked to each other to further form an alicyclic or aromatic monocyclic or polycyclic ring;
• and
• the term ‘substituted’ in the ‘substituted or unsubstituted’ in [Formula 1] and [Structural Formula 1] means being substituted with one or more substituents selected from the group consisting of deuterium, tritium, C1-C24 alkyl, C1-C24 haloalkyl, C2-C24 alkenyl, C2-C24 alkynyl, C3-C30 cycloalkyl, C1-C24 heteroalkyl, C6-C30 aryl, C7-C30 arylalkyl, C7-C30 alkylaryl, C2-C30 heteroaryl, C2-C30 heteroarylalkyl, cyclic groups in which a C3-C24 aliphatic ring and a C5-C24 aromatic ring are fused together, C1-C24 alkoxy, C1-C30 amine, C1-C30 silyl, C1-C30 germanium, C6-C24 aryloxy, C6-C24 arylthionyl, cyano, halogen, hydroxyl and nitro, and when there are two or more substituents, they are the same as or different from each other, and one or more hydrogen atoms in each of the substituents are optionally substituted with deuterium or tritium atoms.