Organic light-emitting device

1. A heterocyclic compound represented by Formula 1 below:

wherein in Formula 1, R 1 and R 2 are each independently selected from the group consisting of 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 substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted amino group with a C 6 -C 60 aryl or C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 6 -C 60 condensed polycyclic group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, and a carboxyl group; and

A and A′ are each a substituted or unsubstituted pyridine ring.

2. The heterocyclic compound of claim 1 , wherein R 1 and R 2 in Formula 1 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a C 1 -C 40 alkyl group, and groups represented by formulae 2a to 2h below:

wherein, in formulae 2a to 2h, Q 1 is a linking group represented by —C(R 3 )(R 4 )—, —N(R 3 )—, —S—, or —O—;

Z 1 , Z 2 , Ar 12 , Ar 13 , R 3 , and R 4 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a C 1 -C 20 alkyl group, a substituted or unsubstituted C 6 -C 20 aryl group, a substituted or unsubstituted C 2 -C 20 heterocyclic group, an amino group substituted with a C 6 -C 20 aryl group or C 3 -C 20 heteroaryl group, a cyano group, a nitro group, a hydroxyl group, and a carboxy group;

Ar 11 is a substituted or unsubstituted C 1 -C 20 alkylene group, a substituted or unsubstituted C 6 -C 20 arylene group, or a substituted or unsubstituted C 2 -C 20 heterocyclic divalent group;

p is an integer from 1 to 5 in formula 2a; an integer from 1 to 7 in formulae 2b, 2c, and 2e; an integer from 1 to 12 in formulae 2g; and an integer from 1 to 9 in formulae 2d and 2h;

q is an integer from 1 to 7 in formula 2c; and an integer from 1 to 4 in formula 2e;

r is an integer from 1 to 5; and

* indicates a respective binding site of R 1 and R 2 to a corresponding N in the heterocyclic compound of Formula 1.

3. The heterocyclic compound of claim 1 , wherein R 1 and R 2 in Formula 1 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a methyl group, an ethyl group, a propyl group, a butyl group, a t-butyl, a pentyl group, and groups represented by formulae 3a to 3j below:

wherein, in formulae 3a to 3j, Z 1 , Ar 12 , and Ar 13 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, an unsubstituted C 6 -C 20 aryl group, and a substituted or unsubstituted C 2 -C 20 heterocyclic group;

r is an integer from 1 to 2;

p is an integer from 1 to 5; and

* indicates a respective binding site of R 1 and R 2 to a corresponding N in the heterocyclic compound of Formula 1.

4. The heterocyclic compound of claim 1 , wherein the heterocyclic compound represented by Formula 1 comprises one of the compounds represented by formula 2 to 4:

wherein, in formulae 2 to 4, R 1 and R 2 are each independently selected from the group consisting of 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 substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted amino group with a C 6 -C 60 aryl or C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 6 -C 60 condensed polycyclic group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, and a carboxyl group.

5. The heterocyclic compound of claim 1 , wherein R 1 and R 2 are the same.

6. The heterocyclic compound of claim 1 , wherein A and A′ are the same.

7. The heterocyclic compound of claim 1 , wherein A and A′ in Formula 1 are the same, and R 1 and R 2 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a methyl group, an ethyl group, a propyl group, a butyl group, a t-butyl, a pentyl group, and groups represented by formulae 3a to 3j below:

wherein, in formulae 3a to 3j, Z 1 , Ar 12 , and Ar 13 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, an unsubstituted C 6 -C 20 aryl group, and a substituted or unsubstituted C 2 -C 20 heterocyclic group;

r is an integer from 1 to 2;

p is an integer from 1 to 5; and

* indicates a respective binding site of R 1 and R 2 to a corresponding N in the heterocyclic compound of Formula 1.

8. The heterocyclic compound of claim 1 , wherein R 1 and R 2 in Formula 1 are the same, and are selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a methyl group, an ethyl group, a propyl group, a butyl group, a t-butyl, a pentyl group, and groups represented by formulae 3a to 3j below:

wherein, in formulae 3a to 3j, Z 1 , Ar 12 , and Ar 13 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, an unsubstituted C 6 -C 20 aryl group, and a substituted or unsubstituted C 2 -C 20 heterocyclic group;

r is an integer from 1 to 2;

p is an integer from 1 to 5; and

* indicates a respective binding site of R 1 and R 2 to a corresponding N in the heterocyclic compound of Formula 1.

9. The heterocyclic compound of claim 1 , wherein the heterocyclic compound represented by Formula 1 comprises one of the compounds represented by formulae 2 to 4:

wherein, in formulae 2 to 4, R 1 and R 2 are the same, and are selected from among 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 substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted amino group with a C 6 -C 60 aryl or C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 6 -C 60 condensed polycyclic group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, and a carboxyl group.

10. The heterocyclic compound of claim 1 , wherein the heterocyclic compound represented by Formula 1 comprises one of the compounds below:

11. An organic light-emitting device comprising:

a first electrode;

a second electrode; and

an organic layer disposed between the first electrode and the second electrode, the organic layer comprising a first layer comprising the heterocyclic compound of claim 1 .

12. The organic light-emitting device of claim 11 , wherein the first layer comprises a hole injection layer, a hole transport layer, a functional layer having both hole injection and hole transport capabilities, an electron injection layer, an electron transport layer, or a functional layer having both electron injection and electron transport capabilities.

13. The organic light-emitting device of claim 11 , wherein the first layer comprises an emission layer, and the heterocyclic compound is used as a host or dopant for a fluorescent or phosphorescent device.

14. The organic light-emitting device of claim 11 , wherein the organic layer comprises an emission layer, a hole transport layer, and an electron transport layer, the first layer is the electron transport layer, the hole transport layer, or the electron transport layer, and the emission layer further comprises an anthracene compound, an arylamine compound, or a styryl compound.

15. The organic light-emitting device of claim 11 , wherein the organic layer comprises an emission layer, a hole transport layer, and an electron transport layer, the first layer is the electron transport layer, the hole transport layer, or the electron transport layer, and the emission layer comprises red, green, blue, and white emission layers, one of which comprises a phosphorescent compound.

16. The organic light-emitting device of claim 11 , wherein the organic layer further 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 thereof.

17. The organic light-emitting device of claim 16 , wherein at least one of the hole injection layer, the hole transport layer, and the functional layer having hole injection and hole transport capabilities further comprises a charge generating material.

18. The organic light-emitting device of claim 16 , wherein the emission layer comprises a host and a dopant, the dopant comprising a fluorescent dopant or a phosphorescent dopant.

19. The organic light-emitting device of claim 11 , wherein the first layer comprising the heterocyclic compound is formed utilizing a wet process.

20. A flat panel display device comprising:

an organic light-emitting device, the organic light-emitting device comprising:

a first electrode;

a second electrode; and

an organic layer disposed between the first electrode and the second electrode, the organic layer comprising a first layer comprising the heterocyclic compound of claim 1 ,

wherein the first electrode of the organic light-emitting device is configured to be electrically connected to a source electrode or a drain electrode of a thin-film transistor.