Heterocyclic compound and organic light-emitting device including the same

1. A heterocyclic compound represented by Formula 1 below:

Formula 1

wherein R 1 through R 13 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, an amino group, a nitro group, a hydroxyl group, a carboxyl group, a substituted or unsubstituted C 1 -C 50 alkyl group, a substituted or unsubstituted C 2 -C 50 alkenyl group, a substituted or unsubstituted C 2 -C 50 alkynyl group, a substituted or unsubstituted C 3 -C 50 cycloalkyl group, a substituted or unsubstituted C 1 -C 50 alkoxy group, a group represented by —(Ar 1 ) a —(Ar 11 ), and a group represented by —N[—(Ar 2 ) b —(Ar 12 )][—(Ar 3 ) c —(Ar 13 )], wherein at least two adjacent groups of R 1 through R 13 are linked to form a saturated or unsaturated ring;

Ar 1 through Ar 3 are each independently selected from the group consisting of a substituted or unsubstituted C 1 -C 50 alkylene group, a substituted or unsubstituted C 2 -C 50 alkenylene group, a substituted or unsubstituted C 5 -C 60 arylene group, and a substituted or unsubstituted C 4 -C 60 heteroarylene group;

Ar 11 , Ar 12 and Ar 13 are each independently selected from the group consisting of a substituted or unsubstituted C 5 -C 60 aryl group, a substituted or unsubstituted C 5 -C 50 aryloxy group, a substituted or unsubstituted C 5 -C 50 arylthio group, and a substituted or unsubstituted C 4 -C 60 heteroaryl group;

a, b and c are each independently an integer from 0 to 10; and

—(Ar 1 ) a — groups in —(Ar 1 ) a —(Ar 11 ) are identical to or different from each other, —(Ar 2 ) b — groups in —N[—(Ar 2 ) b —(Ar 12 )][—(Ar 3 ) c —(Ar 13 )] are identical to or different from each other, and —(Ar 3 ) c — groups are identical to or different from each other.

2. A heterocyclic compound of claim 1 , wherein Ar 1 through Ar 3 are each independently selected from the group consisting of a substituted or unsubstituted C 5 -C 20 arylene group and a substituted or unsubstituted C 4 -C 20 heteroarylene group.

3. A heterocyclic compound of claim 1 , wherein Ar 1 through Ar 3 are each independently selected from the group consisting of a phenylene group, a C 1 -C 10 alkyl phenylene group, a di(C 1 -C 10 alkyl) phenylene group, a naphthylene group, a C 1 -C 10 alkyl naphthylene group, a di(C 1 -C 10 alkyl) naphthylene group, an anthrylene group, a C 1 -C 10 alkyl anthrylene group, a di(C 1 -C 10 alkyl) anthrylene group, a fluorenylene group, a C 1 -C 10 alkyl fluorenylene group, a di(C 1 -C 10 alkyl) fluorenylene group, a C 6 -C 14 aryl fluorenylene group, a di(C 6 -C 14 aryl) fluorenylene group, a pyridylene group, a C 1 -C 10 alkyl pyridylene group, a di(C 1 -C 10 alkyl) pyridylene group, a carbazolylene group, a C 1 -C 10 alkyl carbazolylene group, and a di(C 1 -C 10 alkyl) carbazolylene group.

4. A heterocyclic compound of claim 1 , wherein Ar 1 through Ar 3 are each independently selected from the groups represented by Formulae 2A through 2G below:

wherein Z 1 , Z 2 , Z 11 and Z 12 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, and a C 6 -C 14 aryl group; p is an integer from 1 to 8; * denotes a binding site with Ar 11 , Ar 12 or Ar 13 ; and *′ denotes a binding site with a ring of Formula 1, wherein at least two adjacent groups of Z 1 , Z 2 , Z 11 and Z 12 may be linked to form a saturated or unsaturated ring.

5. A heterocyclic compound of claim 1 , wherein Ar 11 , Ar 12 and Ar 13 are each independently selected from the group consisting of a substituted or unsubstituted C 5 -C 20 aryl group and a substituted or unsubstituted C 4 -C 20 heteroaryl group.

6. A heterocyclic compound of claim 1 , wherein Ar 11 , Ar 12 and Ar 13 are each independently selected from the group consisting of a phenyl group, a C 1 -C 10 alkyl phenyl group, a di(C 1 -C 10 alkyl)phenyl group, a C 6 -C 14 aryl phenyl group, a di(C 6 -C 14 aryl)phenyl group, a naphthyl group, a C 1 -C 10 alkyl naphthyl group, a di(C 1 -C 10 alkyl)naphthyl group, a C 6 -C 14 aryl naphthyl group, a di(C 6 -C 14 aryl)naphthyl group, an anthryl group, a C 1 -C 10 alkyl anthryl group, a di(C 1 -C 10 alkyl)anthryl group, a C 6 -C 14 aryl anthryl group, a di(C 6 -C 14 aryl)anthryl group, a phenanthryl group, a C 1 -C 10 alkyl phenanthryl group, a di(C 1 -C 10 alkyl)phenanthryl group, a C 6 -C 14 aryl phenanthryl group, a di(C 6 -C 14 aryl)phenanthryl group, a fluorenyl group, a C 1 -C 10 alkyl fluorenyl group, a di(C 1 -C 10 alkyl)fluorenyl group, a C 6 -C 14 aryl fluorenyl group, a di(C 6 -C 14 aryl) fluorenyl group, a pyridyl group, a C 1 -C 10 alkyl pyridyl group, a di(C 1 -C 10 alkyl)pyridyl group, a pyrenyl group, a C 1 -C 10 alkyl pyrenyl group, a di(C 1 -C 10 alkyl)pyrenyl group, a C 6 -C 14 aryl pyrenyl group, a di(C 6 -C 14 aryl)pyrenyl group, a phenanthrolinyl group, a C 1 -C 10 alkyl phenanthrolinyl group, a di(C 1 -C 10 alkyl)phenanthiolinyl group, a C 6 -C 14 aryl phenanthrolinyl group, a di(C 6 -C 14 aryl)phenanthrolinyl group, a quinolinyl group, C 1 -C 10 alkyl quinolinyl group, a di(C 1 -C 10 alkyl)quinolinyl group, a C 6 -C 14 aryl quinolinyl group, a di(C 6 -C 14 aryl)quinolinyl group, a benzoxazolyl group, a C 1 -C 10 alkyl benzoxazolyl group, a di(C 1 -C 10 alkyl)benzoxazolyl group, a C 6 -C 14 aryl benzoxazolyl group, a di(C 6 -C 14 aryl)benzoxazolyl group, a benzothiazolyl group, a C 1 -C 10 alkyl benzothiazolyl group, a di(C 1 -C 10 alkyl)benzothiazolyl group, a C 6 -C 14 aryl benzothiazolyl group, a di(C 6 -C 14 aryl)benzothiazolyl group, a benzimidazolyl group, a C 1 -C 10 alkyl benzimidazolyl group, a di(C 1 -C 10 alkyl)benzimidazolyl group, a C 6 -C 14 aryl benzimidazolyl group, a di(C 6 -C 14 aryl)benzimidazolyl group, an imidazolpyridinyl group, a C 1 -C 10 alkyl imidazolpyridinyl group, a di(C 1 -C 10 alkyl) imidazolpyridinyl group, a C 6 -C 14 aryl imidazolpyridinyl group, a di(C 6 -C 14 aryl)imidazolpyridinyl group, an imidazolpyrimidinyl group, a C 1 -C 10 alkyl imidazolpyrimidinyl group, a di(C 1 -C 10 alkyl)imidazolpyrimidinyl group, a C 6 -C 14 aryl imidazolpyrimidinyl group, a di(C 6 -C 14 aryl)imidazolpyrimidinyl group, a carbazolyl group, a C 1 -C 10 alkyl carbazolyl group, a di(C 1 -C 10 alkyl)carbazolyl group, a C 6 -C 14 aryl carbazolyl group, and a di(C 6 -C 14 aryl)carbazolyl group.

7. A heterocyclic compound of claim 1 , wherein Ar 11 , Ar 12 , and Ar 13 are each independently selected from among the groups represented by Formulae 3A through 3O below:

wherein Z 1 , Z 2 , Z 3 , Z 11 and Z 12 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, and a C 6 -C 14 aryl group; p is an integer from 1 to 8; and * denotes a binding site with Ar 11 , Ar 12 or Ar 13 , wherein at least two adjacent groups of Z 1 , Z 2 , Z 3 , Z 11 and Z 12 may be linked to form a saturated or unsaturated ring.

8. A heterocyclic compound of claim 1 , wherein a, b, and c are each independently 0, 1, 2 or 3.

9. A heterocyclic compound of claim 1 , wherein R 1 through R 13 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, an amino group, a nitro group, a hydroxyl group, a substituted or unsubstituted C 1 -C 10 alkyl group, a group represented by —(Ar 1 ) a —(Ar 11 ), and a group represented by —N[—(Ar 2 ) b —(Ar 12 )][—(Ar 3 ) c —(Ar 13 )];

Ar 1 through Ar 3 are each independently selected from the group consisting of a substituted or unsubstituted C 5 -C 20 arylene group and a substituted or unsubstituted C 4 - C 20 heteroarylene group;

Ar 11 , Ar 12 and Ar 13 are each independently selected from the group consisting of a phenyl group, a C 1 -C 10 alkyl phenyl group, a di(C 1 -C 10 alkyl)phenyl group, a C 6 -C 14 aryl phenyl group, a di(C 6 -C 14 aryl)phenyl group, a naphthyl group, a C 1 -C 10 alkyl naphthyl group, a di(C 1 -C 10 alkyl)naphthyl group, a C 6 -C 14 aryl naphthyl group, a di(C 6 -C 14 aryl)naphthyl group, an anthryl group, a C 1 -C 10 alkyl anthryl group, a di(C 1 -C 10 alkyl)anthryl group, a C 6 -C 14 aryl anthryl group, a di(C 6 -C 14 aryl)anthryl group, a phenanthryl group, a C 1 -C 10 alkyl phenanthryl group, a di(C 1 -C 10 alkyl)phenanthryl group, a C 6 -C 14 aryl phenanthryl group, a di(C 6 -C 14 aryl)phenanthryl group, a fluorenyl group, a C 1 -C 10 alkyl fluorenyl group, a di(C 1 -C 10 alkyl)fluorenyl group, a C 6 -C 14 aryl fluorenyl group, a di(C 6 -C 14 aryl) fluorenyl group, a pyridyl group, a C 1 -C 10 alkyl pyridyl group, a di(C 1 -C 10 alkyl)pyridyl group, a pyrenyl group, a C 1 -C 10 alkyl pyrenyl group, a di(C 1 -C 10 alkyl)pyrenyl group, a C 6 -C 14 aryl pyrenyl group, a di(C 6 -C 14 aryl)pyrenyl group, a phenanthrolinyl group, a C 1 -C 10 alkyl phenanthrolinyl group, a di(C 1 -C 10 alkyl)phenanthrolinyl group, a C 6 -C 14 aryl phenanthrolinyl group, a di(C 6 -C 14 aryl)phenanthrolinyl group, a quinolinyl group, a C 1 -C 10 alkyl quinolinyl group, a di(C 1 -C 10 alkyl)quinolinyl group, a C 6 -C 14 aryl quinolinyl group, a di(C 6 -C 14 aryl)quinolinyl group, a benzoxazolyl group, a C 1 -C 10 alkyl benzoxazolyl group, a di(C 1 -C 10 alkyl)benzoxazolyl group, a C 6 -C 14 aryl benzoxazolyl group, a di(C 6 -C 14 aryl)benzoxazolyl group, a benzothiazolyl group, a C 1 -C 10 alkyl benzothiazolyl group, a di(C 1 -C 10 alkyl)benzothiazolyl group, a C 6 -C 14 aryl benzothiazolyl group, a di(C 6 -C 14 aryl)benzothiazolyl group, a benzimidazolyl group, a C 1 -C 10 alkyl benzimidazolyl group, a di(C 1 -C 10 alkyl)benzimidazolyl group, a C 6 -C 14 aryl benzimidazolyl group, a di(C 6 -C 14 aryl)benzimidazolyl group, an imidazolpyridinyl group, a C 1 -C 10 alkyl imidazolpyridinyl group, a di(C 1 -C 10 alkyl) imidazolpyridinyl group, a C 6 -C 14 aryl imidazolpyridinyl group, a di(C 6 -C 14 aryl)imidazolpyridinyl group, an imidazolpyrimidinyl group, a C 1 -C 10 alkyl imidazolpyrimidinyl group, a di(C 1 -C 10 alkyl)imidazolpyrimidinyl group, a C 6 -C 14 aryl imidazolpyrimidinyl group, a di(C 6 -C 14 aryl)imidazolpyrimidinyl group, a carbazolyl group, a C 1 -C 10 alkyl carbazolyl group, a di(C 1 -C 10 alkyl)carbazolyl group, a C 6 -C 14 aryl carbazolyl group, and a di(C 6 -C 14 aryl)carbazolyl group; and

a, b, and c are each independently 0, 1, 2 or 3.

10. A heterocyclic compound of claim 1 , wherein the heterocyclic compound is represented by Formula 2 below:

wherein, in Formula 2, R 1 , R 2 , R 3 and R 8 are each independently selected from the group consisting of a substituted or unsubstituted C 1 -C 50 alkyl group, a substituted or unsubstituted C 2 -C 50 alkenyl group, a substituted or unsubstituted C 2 -C 50 alkynyl group, a substituted or unsubstituted C 3 -C 50 cycloalkyl group, a substituted or unsubstituted C 1 -C 50 alkoxy group, a group represented by —(Ar 1 ) a —(Ar 11 ), and a group represented by —N[—(Ar 2 ) b —(Ar 12 )][—(Ar 3 ) c —(Ar 13 )], wherein at least two adjacent groups of R 1 through R 3 are linked to form a saturated or unsaturated ring;

Ar 1 through Ar 3 are each independently selected from the group consisting of a substituted or unsubstituted C 1 -C 50 alkylene group, a substituted or unsubstituted C 2 -C 50 alkenylene group, a substituted or unsubstituted C 5 -C 60 arylene group, and a substituted or unsubstituted C 4 -C 60 heteroarylene group;

Ar 11 , Ar 12 and Ar 13 are each independently selected from the group consisting of a substituted or unsubstituted C 5 -C 60 aryl group, a substituted or unsubstituted C 5 -C 50 aryloxy group, a substituted or unsubstituted C 5 -C 50 arylthio group, and a substituted or unsubstituted C 4 -C 60 heteroaryl group;

a, b and c are each independently an integer from 0 to 10; and

—(Ar 1 ) a — groups in —(Ar 1 ) a —(Ar 11 ) are identical to or different from each other, —(Ar 2 ) b — groups in —N[—(Ar 2 ) b —(Ar 12 )][—(Ar 3 ) c —(Ar 13 )] are identical to or different from each other, and —(Ar 3 ) c — groups are identical to or different from each other.

11. A heterocyclic compound of claim 10 , wherein Ar 1 through Ar 3 are each independently selected from the group consisting of a substituted or unsubstituted C 5 -C 20 arylene group and a substituted or unsubstituted C 4 -C 20 heteroarylene group.

12. A heterocyclic compound of claim 10 , wherein Ar 1 through Ar 3 are each independently selected from the group consisting of a phenylene group, a C 1 -C 10 alkyl phenylene group, a di(C 1 -C 10 alkyl) phenylene group, a naphthylene group, a C 1 -C 10 alkyl naphthylene group, a di(C 1 -C 10 alkyl) naphthylene group, an anthrylene group, a C 1 -C 10 alkyl anthrylene group, a di(C 1 -C 10 alkyl) anthrylene group, a fluorenylene group, a C 1 -C 10 alkyl fluorenylene group, a di(C 1 -C 10 alkyl) fluorenylene group, a C 6 -C 14 aryl fluorenylene group, a di(C 6 -C 14 aryl) fluorenylene group, a pyridylene group, a C 1 -C 10 alkyl pyridylene group, a di(C 1 -C 10 alkyl) pyridylene group, a carbazolylene group, a C 1 -C 10 alkyl carbazolylene group, and a di(C 1 -C 10 alkyl) carbazolylene group.

13. A heterocyclic compound of claim 10 , wherein Ar 1 through Ar 3 are each independently selected from the groups represented by Formulae 2A through 2G below:

wherein Z 1 , Z 2 , Z 11 and Z 12 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, and a C 6 -C 14 aryl group; p is an integer from 1 to 8; * denotes a binding site with Ar 11 , Ar 12 or Ar 13 ; and *′ denotes a binding site with a ring of Formula 1, wherein at least two adjacent groups of Z 1 , Z 2 , Z 11 and Z 12 may be linked to form a saturated or unsaturated ring.

14. A heterocyclic compound of claim 10 , wherein Ar 11 , Ar 12 and Ar 13 are each independently selected from the group consisting of a substituted or unsubstituted C 5 -C 20 aryl group and a substituted or unsubstituted C 4 -C 20 heteroaryl group.

15. A heterocyclic compound of claim 10 , wherein Ar 11 , Ar 12 and Ar 13 are each independently selected from the group consisting of a phenyl group, a C 1 -C 10 alkyl phenyl group, a di(C 1 -C 10 alkyl)phenyl group, a C 6 -C 14 aryl phenyl group, a di(C 6 -C 14 aryl)phenyl group, a naphthyl group, a C 1 -C 10 alkyl naphthyl group, a di(C 1 -C 10 alkyl)naphthyl group, a C 6 -C 14 aryl naphthyl group, a di(C 6 -C 14 aryl)naphthyl group, an anthryl group, a C 1 -C 10 alkyl anthryl group, a di(C 1 -C 10 alkyl)anthryl group, a C 6 -C 14 aryl anthryl group, a di(C 6 -C 14 aryl)anthryl group, a phenanthryl group, a C 1 -C 10 alkyl phenanthryl group, a di(C 1 -C 10 alkyl)phenanthryl group, a C 6 -C 14 aryl phenanthryl group, a di(C 6 -C 14 aryl)phenanthryl group, a fluorenyl group, a C 1 -C 10 alkyl fluorenyl group, a di(C 1 -C 10 alkyl)fluorenyl group, a C 6 -C 14 aryl fluorenyl group, a di(C 6 -C 14 aryl) fluorenyl group, a pyridyl group, a C 1 -C 10 alkyl pyridyl group, a di(C 1 -C 10 alkyl)pyridyl group, a pyrenyl group, a C 1 -C 10 alkyl pyrenyl group, a di(C 1 -C 10 alkyl)pyrenyl group, a C 6 -C 14 aryl pyrenyl group, a di(C 6 -C 14 aryl)pyrenyl group, a phenanthrolinyl group, a C 1 -C 10 alkyl phenanthrolinyl group, a di(C 1 -C 10 alkyl)phenanthrolinyl group, a C 6 -C 14 aryl phenanthrolinyl group, a di(C 6 -C 14 aryl)phenanthrolinyl group, a quinolinyl group, C 1 -C 10 alkyl quinolinyl group, a di(C 1 -C 10 alkyl)quinolinyl group, a C 6 -C 14 aryl quinolinyl group, a di(C 6 -C 14 aryl)quinolinyl group, a benzoxazolyl group, a C 1 -C 10 alkyl benzoxazolyl group, a di(C 1 -C 10 alkyl)benzoxazolyl group, a C 6 -C 14 aryl benzoxazolyl group, a di(C 6 -C 14 aryl)benzoxazolyl group, a benzothiazolyl group, a C 1 -C 10 alkyl benzothiazolyl group, a di(C 1 -C 10 alkyl)benzothiazolyl group, a C 6 -C 14 aryl benzothiazolyl group, a di(C 6 -C 14 aryl)benzothiazolyl group, a benzimidazolyl group, a C 1 -C 10 alkyl benzimidazolyl group, a di(C 1 -C 10 alkyl)benzimidazolyl group, a C 6 -C 14 aryl benzimidazolyl group, a di(C 6 -C 14 aryl)benzimidazolyl group, an imidazolpyridinyl group, a C 1 -C 10 alkyl imidazolpyridinyl group, a di(C 1 -C 10 alkyl) imidazolpyridinyl group, a C 6 -C 14 aryl imidazolpyridinyl group, a di(C 6 -C 14 aryl)imidazolpyridinyl group, an imidazolpyrimidinyl group, a C 1 -C 10 alkyl imidazolpyrimidinyl group, a di(C 1 -C 10 alkyl)imidazolpyrimidinyl group, a C 6 -C 14 aryl imidazolpyrimidinyl group, a di(C 6 -C 14 aryl)imidazolpyrimidinyl group, a carbazolyl group, a C 1 -C 10 alkyl carbazolyl group, a di(C 1 -C 10 alkyl)carbazolyl group, a C 6 -C 14 aryl carbazolyl group, and a di(C 6 -C 14 aryl)carbazolyl group.

16. A heterocyclic compound of claim 10 , wherein Ar 11 , Ar 12 , and Ar 13 are each independently selected from the groups represented by Formulae 3A through 3O below:

wherein Z 1 , Z 2 , Z 3 , Z 11 and Z 12 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, and a C 6 -C 14 aryl group; p is an integer from 1 to 8; and * denotes a binding site with Ar 11 , Ar 12 or Ar 13 , wherein at least two adjacent groups of Z 1 , Z 2 , Z 3 , Z 11 and Z 12 may be linked to form a saturated or unsaturated ring.

17. A heterocyclic compound of claim 10 , wherein a, b, and c are each independently 0, 1, 2 or 3.

18. A heterocyclic compound of claim 10 , wherein R 1 and R 8 are each independently selected from the group consisting of a group represented by —(Ar 1 ) a —(Ar 11 ) and a group represented by —N[—(Ar 2 ) b —(Ar 12 )][—(Ar 3 ) c —(Ar 13 )]; and R 2 and R 3 are each independently selected from the group consisting of a methyl group and a phenyl group;

Ar 1 through Ar 3 are each independently selected from the group consisting of a substituted or unsubstituted C 5 -C 20 arylene group and a substituted or unsubstituted C 4 -C 20 heteroarylene group;

Ar 11 , Ar 12 and Ar 13 are each independently selected from the group consisting of a phenyl group, a C 1 -C 10 alkyl phenyl group, a di(C 1 -C 10 alkyl)phenyl group, a C 6 -C 14 aryl phenyl group, a di(C 6 -C 14 aryl)phenyl group, a naphthyl group, a C 1 -C 10 alkyl naphthyl group, a di(C 1 -C 10 alkyl)naphthyl group, a C 6 -C 14 aryl naphthyl group, a di(C 6 -C 14 aryl)naphthyl group, an anthryl group, a C 1 -C 10 alkyl anthryl group, a di(C 1 -C 10 alkyl)anthryl group, a C 6 -C 14 aryl anthryl group, a di(C 6 -C 14 aryl)anthryl group, a phenanthryl group, a C 1 -C 10 alkyl phenanthryl group, a di(C 1 -C 10 alkyl)phenanthryl group, a C 6 -C 14 aryl phenanthryl group, a di(C 6 -C 14 aryl)phenanthryl group, a fluorenyl group, a C 1 -C 10 alkyl fluorenyl group, a di(C 1 -C 10 alkyl)fluorenyl group, a C 6 -C 14 aryl fluorenyl group, a di(C 6 -C 14 aryl) fluorenyl group, a pyridyl group, a C 1 -C 10 alkyl pyridyl group, a di(C 1 -C 10 alkyl)pyridyl group, a pyrenyl group, a C 1 -C 10 alkyl pyrenyl group, a di(C 1 -C 10 alkyl)pyrenyl group, a C 6 -C 14 aryl pyrenyl group, a di(C 6 -C 14 aryl)pyrenyl group, a phenanthrolinyl group, a C 1 -C 10 alkyl phenanthrolinyl group, a di(C 1 -C 10 alkyl)phenanthrolinyl group, a C 6 -C 14 aryl phenanthrolinyl group, a di(C 6 -C 14 aryl)phenanthrolinyl group, a quinolinyl group, a C 1 -C 10 alkyl quinolinyl group, a di(C 1 -C 10 alkyl)quinolinyl group, a C 6 -C 14 aryl quinolinyl group, a di(C 6 -C 14 aryl)quinolinyl group, a benzoxazolyl group, a C 1 -C 10 alkyl benzoxazolyl group, a di(C 1 -C 10 alkyl)benzoxazolyl group, a C 6 -C 14 aryl benzoxazolyl group, a di(C 6 -C 14 aryl)benzoxazolyl group, a benzothiazolyl group, a C 1 -C 10 alkyl benzothiazolyl group, a di(C 1 -C 10 alkyl)benzothiazolyl group, a C 6 -C 14 aryl benzothiazolyl group, a di(C 6 -C 14 aryl)benzothiazolyl group, a benzimidazolyl group, a C 1 -C 10 alkyl benzimidazolyl group, a di(C 1 -C 10 alkyl)benzimidazolyl group, a C 6 -C 14 aryl benzimidazolyl group, a di(C 6 -C 14 aryl)benzimidazolyl group, an imidazolpyridinyl group, a C 1 -C 10 alkyl imidazolpyridinyl group, a di(C 1 -C 10 alkyl) imidazolpyridinyl group, a C 6 -C 14 aryl imidazolpyridinyl group, a di(C 6 -C 14 aryl)imidazolpyridinyl group, an imidazolpyrimidinyl group, a C 1 -C 10 alkyl imidazolpyrimidinyl group, a di(C 1 -C 10 alkyl)imidazolpyrimidinyl group, a C 6 -C 14 aryl imidazolpyrimidinyl group, a di(C 6 -C 14 aryl)imidazolpyrimidinyl group, a carbazolyl group, a C 1 -C 10 alkyl carbazolyl group, a di(C 1 -C 10 alkyl)carbazolyl group, a C 6 -C 14 aryl carbazolyl group, and a di(C 6 -C 14 aryl)carbazolyl group; and

a, b, and c are each independently 0, 1, 2 or 3.

19. An organic light-emitting device comprising:

a first electrode;

a second electrode disposed opposite to the first electrode; and

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

20. The organic light-emitting device of claim 19 , wherein the organic layer is selected from the group consisting of an electron injection layer, an electron transport layer, and an emission layer.