Heterocyclic compound and organic light-emitting element comprising same

A heterocyclic compound of Chemical Formula 1:

• wherein, in Chemical Formula 1:
• adjacent one or more pairs of * bond to X1 and X2 of the following Chemical Formula 2:
• wherein in Chemical Formula 2:
• * means the part of Chemical Formula 1 bonding to X1 and X2;
• any one of X1 and X2 is a direct bond;
• when X1 is a direct bond, X2 is CRaRb, O or S;
• when X2 is a direct bond, X1 is CRaRb, O or S;
• and
• at least one of R1 to R5 is the following Chemical Formula 3, and the rest that are not Chemical Formula 3 are the same as or different from each other and each independently is hydrogen, deuterium, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group or a combination thereof;
• wherein in Chemical Formula 3:
• is a part bonding to the core of Chemical Formula 1;
• at least one of Z1 and Z2 is N, and the other one is CRc;
• Y1 to Y3 are the same as or different from each other, and each independently is CRd or N;
• L1 is a direct bond, a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted heteroarylene group or a combination thereof,
• Ra to Rd are the same as or different from each other, and each independently is hydrogen, deuterium, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group or a combination thereof,
• Rd bonds to adjacent substituents to form a substituted or unsubstituted ring;
• a is an integer of 0 to 4, and when a is 2 or greater, the R1s are the same as or different from each other;
• b is an integer of 0 to 4, and when b is 2 or greater, the R2s are the same as or different from each other;
• c is an integer of 0 to 3, and when c is 2 or greater, the R3s are the same as or different from each other;
• d is an integer of 0 to 4, and when d is 2 or greater, the R4s are the same as or different from each other;
• and
• e is an integer of 0 to 4, and when e is 2 or greater, the R5s are the same as or different from each other.