Heterocyclic compound and organic light-emitting device comprising the same

1. A heterocyclic compound represented by one selected from Formulae 2 and 3 below:

where R 1 to R 10 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 1 -C 60 alkenyl group, a substituted or unsubstituted C 1 -C 60 alkynyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, an amino group substituted with a C 6 -C 60 aryl group, a C 1 -C 60 alkyl group, a C 1 -C 60 alkenyl group, or a C 1 -C 60 alkynyl group, or a substituted or unsubstituted C 6 -C 60 condensed polycyclic group, X is a substituted or unsubstituted C 1 -C 50 alkyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted heteroaryl group, or a substituted or unsubstituted C 6 -C 60 condensed polycyclic group; and

wherein A 1 to A 4 are each independently ═CR 21 — or ═NR 22 —, and at least one selected from A 1 to A 4 is ═NR 22 — in Formula 2, and

R 21 is: a non-bonding pair of electrons; a hydrogen atom; a deuterium atom; a halogen atom; a cyano group; a substituted or unsubstituted C 1 -C 60 alkyl group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted C 1 -C 60 alkynyl group; a substituted or unsubstituted C 6 -C 60 aryl group; a substituted or unsubstituted heteroaryl group; an amino group substituted with a C 6 -C 60 aryl group, a C 1 -C 60 alkyl group, a C 1 -C 60 alkenyl group, or a C 1 -C 60 alkynyl group; or a substituted or unsubstituted C 6 -C 60 condensed polycyclic group,

R 22 is a non-bonding pair of electrons, and

R 21 and R 22 of A 1 to A 4 are same or different, and adjacent R 21 and R 22 are selectively fused to each other, thereby forming a ring; and

wherein R 7 of Formula 2 and R 8 of Formula 3 are each independently one of Formulae 2a to 2c below:

where Q 1 is a linking group represented by —N(R 31 )—, —S—, or —O; Y is —N═ or —CH═; Z 1 and R 31 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 6 -C 20 aryl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted C 6 -C 20 condensed polycyclic group, an amino group substituted with a C 6 -C 20 aryl group or a C 1 -C 20 heteroaryl group, a halogen group, a cyano group, a nitro group, a hydroxyl group, or a carboxyl group;

p is an integer from 1 to 4 in Formula 2a;

p is an integer from 1 to 5 in Formula 2b;

p is an integer from 1 to 7 in Formula 2c; and

* is a binding site.

2. The heterocyclic compound of claim 1 , wherein X of Formula 2 or 3 is a compound represented by Formula 3a or 3b below:

where Y 1 to Y 3 are each independently —N═ or —CH═;

Z 1 and Z 2 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 6 -C 20 aryl group, a substituted or unsubstituted C 1 -C 20 heteroaryl group, a substituted or unsubstituted C 6 -C 20 condensed polycyclic group, an amino group substituted with a C 6 -C 20 aryl group or a C 1 -C 20 heteroaryl group, a halogen group, a cyano group, a nitro group, a hydroxyl group, or a carboxyl group;

p is an integer from 1 to 5; and

* is a binding site.

3. The heterocyclic compound of claim 1 , wherein R 1 to R 5 and R 10 of Formula 2 or 3 are each independently a hydrogen atom or a deuterium atom.

4. The heterocyclic compound of claim 1 , wherein the heterocyclic compound represented by Formula 2 or 3 comprises one of the of the compounds below:

5. An organic light-emitting device comprising:

a first electrode;

a second electrode; and

an organic layer interposed between the first electrode and the second electrode,

wherein the organic layer comprises a heterocyclic compound of claim 1 .

6. The organic light-emitting device of claim 5 , wherein the organic layer is an emission layer, and the heterocyclic compound is used as a phosphorescent host.

7. The organic light-emitting device of claim 5 , wherein the organic layer is an electron transport layer, and the heterocyclic compound is used as an electron transporting material.

8. The organic light-emitting device of claim 5 , wherein the organic layer is a hole transport layer, and the heterocyclic compound is used as a hole transporting material.

9. The organic light-emitting device of claim 5 , wherein the organic layer is a green emission layer or a red emission layer.

10. The organic light-emitting device of claim 5 , wherein the organic light-emitting device comprises an emission layer, a hole injection layer, a hole transport layer, or a functional layer having both hole injecting and hole transporting capabilities,

the emission layer, the hole injection layer, the hole transport layer, or the functional layer having both hole injecting and hole transporting capabilities comprises the heterocyclic compound, and

the emission layer comprises an anthracene-based compound, an arylamine-based compound, or a styryl-based compound.

11. The organic light-emitting device of claim 5 , wherein the organic light-emitting device comprises an emission layer, a hole injection layer, a hole transport layer, or a functional layer having both hole injecting and hole transporting capabilities,

the emission layer, the hole injection layer, the hole transport layer, or the functional layer having both hole injecting and hole transporting capabilities comprises the heterocyclic compound, and

wherein a red layer, a green layer, a blue layer, or a white layer of the emission layer further comprises a phosphorescent compound.

12. The organic light-emitting device of claim 11 , wherein the hole injection layer, the hole transport layer, and the functional layer having both hole injecting and hole transporting capabilities comprises a charge-generating material.

13. The organic light-emitting device of claim 12 , wherein the charge-generating material is a p-dopant comprising a quinone derivative, a metal oxide, or a cyano group-containing compound.

14. The organic light-emitting device of claim 5 , wherein the organic layer comprises an electron transport layer, and the electron transport layer comprises an electron transporting organic compound and a metal complex.

15. The organic light-emitting device of claim 14 , wherein the metal complex comprises a lithium quinolate (LiQ) or Compound 203 below:

16. The organic light-emitting device of claim 5 , wherein the organic layer is formed of the heterocyclic compound by using a wet process.

17. A flat panel display apparatus comprising

an organic light-emitting device comprising:

a first electrode;

a second electrode; and

an organic layer interposed between the first electrode and the second electrode,

wherein the organic layer comprises a heterocyclic compound of claim 1 .