Heterocyclic compound and organic light-emitting device comprising same

A heterocyclic compound of Chemical Formula 1:

• wherein in Chemical Formula 1;
• at least two of X1 to X3 are N, and the other is CH;
• R1 is a substituted or unsubstituted alkyl group;
• L1 to L4 are the same as or different from each other, and are each independently a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group,
• n1 to n4 are an integer from 0 to 4;
• Ar1 to Ar3 are the same as or different from each other, and are each independently a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• m1 is an integer from 0 to 3;
• when n1 to n4 and m1 are each 2 or higher, substituents in the parenthesis are the same as or different from each other;
• A1 is Chemical Formula 1-1,
• wherein in Chemical Formula 1-1;
• ×Y1 and Y2 are each hydrogen or deuterium, or are directly bonded to each other, or are linked to each other through —C(R31)(R32)-, —Si(R33)(R34)-, —N(R35)-, —O—, or —S—,
• any one of R11 to R26 is linked to L1 of Chemical Formula 1, and of the remaining, one is linked to L4 of Chemical Formula 1, and the others are the same as or different from each other, and are each independently hydrogen, deuterium a cyano group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• and
• R31 to R35 are the same as or different from each other, and are each independently hydrogen, deuterium a cyano group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group.