Light-emitting device including heterocyclic compound and electronic apparatus including light-emitting device

A light-emitting device comprising:

• a first electrode;
• a second electrode facing the first electrode;
• an interlayer between the first electrode and the second electrode, the interlayer comprising an emission layer;
• and
• a heterocyclic compound represented by Formula 1:
• wherein, in Formulae 1 to 4,
• Y2 is a group represented by Formula 2,
• ring CY3 is a group represented by Formula 3,
• ring CY4 is a group represented by Formula 4,
• ring CY21, ring CY22, ring CY31, ring CY32, ring CY41, and ring CY42 are each independently a C3-C60 carbocyclic group or a C1-C60 heterocyclic group,
• X33 is a single bond, O, S, B(R33), N(R33), C(R33)(R34), Si(R33)(R34), or C(R33)═C(R34),
• b33 is an integer from 0 to 3,
• when b33 is 0, X33 is not present,
• X43 is a single bond, O, S, B(R43), N(R43), C(R43)(R44), Si(R43)(R44), or C(R43)═C(R44),
• b43 is an integer from 0 to 3,
• when b43 is 0, X43 is not present,
• R1, R21 to R23, R31 to R34, and R41 to R44 are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C1-C60 alkyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkenyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkynyl group unsubstituted or substituted with at least one R10a, a C1-C60 alkoxy group unsubstituted or substituted with at least one R10a, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a, a C6-C60 aryloxy group unsubstituted or substituted with at least one R10a, a C6-C60 arylthio group unsubstituted or substituted with at least one R10a, a C7-C60 aryl alkyl group unsubstituted or substituted with at least one R10a, a C2-C60 heteroaryl alkyl group unsubstituted or substituted with at least one R10a, —Si(Q1)(Q2)(Q3), —N(Q1)(Q2), —B(Q1)(Q2), —C(═O)(Q1), —S(═O)2(Q1), or —P(═O)(Q1)(Q2),
• a21, a22, a31, a32, a41, and a42 are each independently an integer from 0 to 10,
• wherein, in Formula 2,
• * indicates a binding site to nitrogen (N) bound to Y2 in Formula 1,
• wherein, in Formulae 3 and 4,
• *′ indicates a binding site to nitrogen (N) bound to Y2 in Formula 1, and
• *″ indicates a binding site to nitrogen (N) bound to R1 in Formula 1,
• wherein R10a is:
• deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group;
• a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, or a C1-C60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C3-C60 carbocyclic group, a C1-C60 heterocyclic group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C7-C60 aryl alkyl group, a C2-C60 heteroaryl alkyl group, —Si(Q11)(Q12)(Q13), —N(Q11)(Q12), —B(Q11)(Q12), —C(═O)(Q11), —S(═O)2(Q11), —P(═O)(Q11)(Q12), or any combination thereof;
• a C3-C60 carbocyclic group, a C1-C60 heterocyclic group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C7-C60 aryl alkyl group, or a C2-C60 heteroaryl alkyl group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C60 carbocyclic group, a C1-C60 heterocyclic group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C7-C60 aryl alkyl group, a C2-C60 heteroaryl alkyl group, —Si(Q21)(Q22)(Q23), —N(Q21)(Q22), —B(Q21)(Q22), —C(═O)(Q21), —S(═O)2(Q21), —P(═O)(Q21)(Q22), or any combination thereof;
• or
• —Si(Q31)(Q32)(Q33), —N(Q31)(Q32), —B(Q31)(Q32), —C(═O)(Q31), —S(═O)2(Q31), or —P(═O)(Q31)(Q32), and
• wherein Q1 to Q3, Q11 to Q13, Q21 to Q23, and Q31 to Q33 are each independently:
• hydrogen;
• deuterium;
• —F;
• —Cl;
• —Br;
• —I;
• a hydroxyl group;
• a cyano group;
• a nitro group;
• a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C60 carbocyclic group or a C1-C60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C1-C60 alkyl group, a C1-C60 alkoxy group, a phenyl group, a biphenyl group, a C1-C60 heterocyclic group, or any combination thereof;
• a C7-C60 aryl alkyl group;
• or a C2-C60 heteroaryl alkyl group.