Heterocyclic compound, composition including heterocyclic compound, and organic light-emitting device including heterocyclic compound

A heterocyclic compound represented by Formula 1:

• wherein, in Formula 1,
• X1 to X24 are each independently selected from carbon (C) and nitrogen (N),
• at least one selected from X1 and X4 is C and is bound to -(L2)b2-A1,
• L1 is selected from a substituted or unsubstituted C1-C20 alkylene group, a substituted or unsubstituted C3-C20 cycloalkylene group, a substituted or unsubstituted C5-C60 carbocyclic group, and a substituted or unsubstituted C1-C60 heterocyclic group,
• L2 and L3 are each independently selected from a single bond, a substituted or unsubstituted C1-C20 alkylene group, a substituted or unsubstituted C3-C20 cycloalkylene group, a substituted or unsubstituted Cs-C60 carbocyclic group, and a substituted or unsubstituted C1-C60 heterocyclic group,
• b1 is an integer selected from 1 to 5,
• b2 and b3 are each independently an integer from 0 to 5,
• A1 and A2 are each independently selected from a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted C1-C60 heteroaryloxy group, a substituted or unsubstituted C1-C60 heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and a substituted or unsubstituted C5-C60 heteroaryl group, provided that at least one selected from A1 and A2 is a C5-C60 heteroaryl group,
• R1 to R6 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-Cio heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a C1-C60 heteroaryloxy group, a C1-C60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group,
• a1 , a4, and a5 are each independently an integer from 0 to 3, and
• a2, a3, and a6 are each independently an integer from 0 to 4.