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

A heterocyclic compound represented by Formula 1:

• wherein the heterocyclic compound satisfies Equation 1:
• |EHOMO−ELUMO|≥3.0 eV Equation 1
• wherein, in Equation 1, EHOMO indicates a HOMO energy level value of the heterocyclic compound, and ELUMO indicates a LUMO energy level value of the heterocyclic compound,
• wherein, in Formulae 1 and 2,
• X1 is O, S, or Se,
• L1 and L11 are each independently a single bond, a substituted or unsubstituted benzene group, or a substituted or unsubstituted naphthalene group,
• a1 and a11 are each independently an integer from 1 to 10,
• Ar1 and Ar11 are each independently a substituted or unsubstituted benzene group, or a substituted or unsubstituted naphthalene group,
• R1 to R6 are each independently a group represented by Formula 2, hydrogen, deuterium, —F, —Cl, —Br, —I, a cyano group, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, or a substituted or unsubstituted C1-C60 alkoxy group,
• b3 is an integer from 0 to 3,
• b4 is an integer from 0 to 4,
• b5 is an integer from 0 to 5,
• at least one substituent of the substituted benzene group, the substituted naphthalene group, the substituted C1-C60 alkyl group, the substituted C2-C60 alkenyl group, the substituted C2-C60 alkynyl group, and the substituted C1-C60 alkoxy group is:
• deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, —NCS, 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, or any combination thereof,
• a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, or a C1-C60 alkoxy group, each substituted with at least one deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, —NCS, 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 C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, Si(Q11)(Q12)(Q13), —N(Q11)(Q12), —C(═O)(Q11), or any combination thereof;
• a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, or any combination thereof,
• a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, or any combination thereof, each substituted with at least one 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-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, —Si(Q21)(Q22)(Q23), —N(Q21)(Q22), —C(═O)(Q21), or any combination thereof;
• or
• —Si(Q31)(Q32)(Q33), —N(Q31)(Q32), —C(═O)(Q31), or any combination thereof,
• wherein Q11 to Q13, Q21 to Q23, and Q31 to Q33 are each independently hydrogen, deuterium, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, or a biphenyl group, and
• * indicates a binding site to an adjacent atom.