Heterocyclic compound and organic light-emitting device including the same

1. A heterocyclic compound represented by Formula 1 or Formula 2 below:

wherein, in Formula 1, R 1 and R 2 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 3 -C 60 cycloalkyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, or a carboxyl group; and

Ar 1 to Ar 8 are each independently a substituted or unsubstituted C 5 -C 60 aryloxy group, a substituted or unsubstituted C 5 -C 60 arylthio group, a substituted or unsubstituted C 5 -C 60 aryl group, a substituted amino group with a C 5 -C 60 aryl group or a C 4 -C 60 heteroaryl group, a substituted or unsubstituted C 4 -C 60 heteroaryl group, or a substituted or unsubstituted C 6 -C 60 condensed polycyclic group, and

wherein, in Formula 2, R 3 and R 4 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 3 -C 60 cycloalkyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, or a carboxyl group; and

Ar 9 to Ar 16 are each independently a substituted or unsubstituted C 5 -C 60 aryloxy group, a substituted or unsubstituted C 5 -C 60 arylthio group, a substituted or unsubstituted C 5 -C 60 aryl group, a substituted amino group with a C 5 -C 60 aryl group or a C 4 -C 60 heteroaryl group, a substituted or unsubstituted C 4 -C 60 heteroaryl group, or a substituted or unsubstituted C 6 -C 60 condensed polycyclic group.

2. The heterocyclic compound of claim 1 , wherein R 1 to R 4 in Formulae 1 and 2 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, and a substituted or unsubstituted C 1 -C 20 alkyl group.

3. The heterocyclic compound of claim 1 , wherein Ar 1 to Ar 16 are each independently selected from among groups represented by Formulae 2a to 2f below:

wherein, in Formulae 2a to 2f, Q 1 is a linking group represented by —C(R 5 )(R 6 )—, —N(R 7 )—, —S—, or —O—;

Z 1 , R 5 , R 6 , and R 7 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 5 -C 20 aryl group, a substituted or unsubstituted C 4 -C 20 heteroaryl group, a substituted or unsubstituted C 6 -C 20 condensed polycyclic group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, or a carboxy group;

p is an integer from 1 to 12; and

* indicates a binding site.

4. The heterocyclic compound of claim 1 , wherein R 1 to R 4 in Formulae 1 and 2 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a cyano group, a halogen atom, and a substituted or unsubstituted C 1 -C 20 alkyl group; and

Ar 1 to Ar 16 are each independently a substituted or unsubstituted C 5 -C 30 aryl group, a substituted or unsubstituted C 4 -C 30 heteroaryl group, or a substituted or unsubstituted C 6 -C 30 condensed polycyclic group.

5. A heterocyclic compound represented by Formula 1 or Formula 2 below:

wherein in Formulae 1 and 2, R 1 to R 4 are substituted or unsubstituted C 1 -C 20 alkyl groups; Ar 7 , Ar 8 , Ar 12 , and Ar 13 are hydrogen atoms; and Ar 1 to Ar 6 , Ar 9 to Ar 11 , and Ar 14 to Ar 16 are each independently a substituted or unsubstituted C 5 -C 60 aryloxy group, a substituted or unsubstituted C 5 -C 60 arylthio group, a substituted or unsubstituted C 5 -C 60 aryl group, a substituted amino group with a C 5 -C 60 aryl group or a C 4 -C 60 heteroaryl group, a substituted or unsubstituted C 4 -C 60 heteroaryl group, or a substituted or unsubstituted C 6 -C 60 condensed polycyclic group.

6. The heterocyclic compound of claim 5 , wherein in Formulae 1 and 2, R 1 to R 4 are methyl groups, Ar 7 , Ar 8 , Ar 12 , and Ar 13 are hydrogen atoms; and Ar 1 to Ar 6 , Ar 9 to Ar 11 , and Ar 14 to Ar 16 are each independently selected from among groups represented by Formulae 2a to 2f:

wherein in Formulae 2a to 2f, Q 1 is a linking group represented by —C(R 5 )(R 6 )—, —N(R 7 )—, —S—, or —O—;

Z 1 , R 5 , R 6 , and R 7 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 5 -C 20 aryl group, a substituted or unsubstituted C 4 -C 20 heteroaryl group, a substituted or unsubstituted C 6 -C 20 condensed polycyclic group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, or a carboxy group;

p is an integer from 1 to 12; and

* indicates a binding site.

7. The heterocyclic compound of claim 5 , wherein the compound of Formula 1 or Formula 2 comprises one of the compounds below:

8. An organic light-emitting device comprising:

a first electrode;

a second electrode; and

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

wherein the organic layer comprises the heterocyclic compound represented by Formula 1 or Formula 2 of claim 1 .

9. The organic light-emitting device of claim 8 , wherein the organic layer comprises a layer comprising the heterocyclic compound represented by Formula 1 or Formula 2 of claim 1 .

10. The organic light-emitting device of claim 9 , wherein the layer is an electron injection layer, an electron transport layer, or a single layer having hole injecting and transporting capabilities.

11. The organic light-emitting device of claim 8 , wherein the organic layer comprises an emission layer, and an electron transport layer, wherein the electron transport layer comprises the heterocyclic compound of Formula 1 or Formula 2, and the emission layer comprises an anthracene compound, an arylamine compound, or a styryl compound.

12. The organic light-emitting device of claim 8 , wherein the organic layer comprises an emission layer, and an electron transport layer, wherein the electron transport layer comprises the heterocyclic compound of Formula 1 or Formula 2, and the emission layer comprises red, green, blue, and white emission layers; and one of the red, green, blue, and white emission layers comprises a phosphorescent compound.

13. The organic light-emitting device of claim 8 , wherein the organic layer comprises a hole injection layer, a hole transport layer, a functional layer having both hole injection and hole transport capabilities, an emission layer, a hole blocking layer, an electron transport layer, an electron injection layer, or a combination of at least two of the hole injection layer, the hole transport layer, the functional layer having both hole injection and hole transport capabilities, the emission layer, the hole blocking layer, the electron transport layer, and the electron injection layer thereof.

14. The organic light-emitting device of claim 13 , wherein at least one of the hole injection layer, the hole transport layer, and the functional layer having hole injection and hole transport capabilities comprises a charge generating material.

15. The organic light-emitting device of claim 13 , wherein the electron transport layer comprises an electron-transporting organic compound and a metal-containing compound.

16. The organic light-emitting device of claim 15 , wherein the metal-containing compound comprises a lithium (Li) complex.

17. The organic light-emitting device of claim 9 , wherein the layer is formed using a wet process.

18. A flat panel display device comprising the organic light-emitting device of claim 8 , wherein the first electrode of the organic light-emitting device is electrically connected to a source electrode or a drain electrode of a thin-film transistor.

19. An organic light-emitting device comprising:

a first electrode;

a second electrode; and

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

wherein the organic layer comprises the heterocyclic compound represented by Formula 1 or Formula 2 of claim 5 .