Heterocyclic compound and organic light-emitting device comprising same

A compound represented by the following Chemical Formula 1:

• in Chemical Formula 1,
• L1 and L2 are the same as or different from each other, and are each independently a phenylene group unsubstituted or substituted by a fluorine group, a nitrile group, or an alkyl group of 1 to 50 carbon atoms,
• X1 is N, X2 is N, and X3 is N,
• A is a phenyl group unsubstituted or substituted by an alkyl group of 1 to 50 carbon atoms or a phenyl group;
• or a biphenyl group unsubstituted or substituted by an alkyl group of 1 to 50 carbon atoms or a phenyl group,
• Ar1 and Ar2 are the same as or different from each other, and are each independently a phenyl group unsubstituted or substituted by an alkyl group of 1 to 50 carbon atoms or a phenyl group;
• a fluorenyl group unsubstituted or substituted by an alkyl group of 1 to 50 carbon atoms;
• or a pyridyl group,
• R1 to R4 are the same as or different from each other, and are each independently deuterium;
• a halogen group;
• a nitrile group;
• a nitro group;
• a hydroxy group;
• a substituted or unsubstituted alkyl group of 1 to 50 carbon atoms;
• a substituted or unsubstituted alkenyl group of 2 to 40 carbon atoms;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted aryl group of 6 to 25 carbon atoms;
• or a substituted or unsubstituted aromatic or aliphatic heterocyclic group including one or more of N, O, and S atoms and 2 to 60 carbon atoms,
• a and c are each an integer of 0 to 4, b and d are each an integer of 0 to 3, in the case where a is 2 or more, R1s are the same as or different from each other, in the case where b is 2 or more, R2s are the same as or different from each other, in the case where c is 2 or more, R3s are the same as or different from each other, and in the case where d is 2 or more, R4s are the same as or different from each other.