Heterocyclic compound and organic light-emitting device comprising same

1 . A heterocyclic compound represented by the following Chemical Formula 1:

wherein, in Chemical Formula 1,

L 1 is a direct bond; a substituted or unsubstituted arylene group having 6 to 60 carbon atoms; or a substituted or unsubstituted heteroarylene group having 2 to 60 carbon atoms;

X 1 to X 4 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group having 6 to 20 carbon atoms;

Ar 1 is a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms comprising N as a heteroatom; or a substituted or unsubstituted phosphine oxide group; and

m and n are each independently an integer of 1 to 2, and when m and n are each 2, substituents in the parentheses are the same as or different from each other;

when Aris a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms comprising N as a heteroatom, L 1 is a substituted or unsubstituted arylene group having 6 to 60 carbon atoms; or a substituted or unsubstituted heteroarylene group having 2 to 60 carbon atoms;

wherein the substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms comprising N as a heteroatom is a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted benzocarbazolyl group, a substituted or unsubstituted dibenzocarbazolyl group, a substituted or unsubstituted indolocarbazolyl group, or a group represented by any one of the following Chemical Formulae 3 to 5,

in Chemical Formulae 3 to 5,

* is a position bonding to L 1 of Chemical Formula 1;

Z 1 to Z 3 are the same as or different from each other and each independently N or CH, and at least two or more of Z 1 to Z 3 are N;

L 2 and L 3 are the same as or different from each other, and each independently a direct bond; a substituted or unsubstituted arylene group having 6 to 60 carbon atoms; or a substituted or unsubstituted heteroarylene group having 2 to 60 carbon atoms;

Ar 2 to Ar 6 are the same as or different from each other, and each independently hydrogen; deuterium; a substituted or unsubstituted aryl group having 6 to 60 carbon atoms; or a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms; and

o and p are each independently an integer of 0 to 2, and when o and p are each 2, substituents in the parentheses are the same as or different from each other; and

wherein the “substituted or unsubstituted” means being substituted with one or more substituents selected from the group consisting of a monocyclic or polycyclic aryl group having 6 to 60 carbon atoms; a monocyclic or polycyclic heteroaryl group having 2 to 60 carbon atoms; a phosphine oxide group; and an amine group, or being unsubstituted, or being substituted with a substituent linking two or more substituents selected from among the substituents illustrated above, or being unsubstituted.

2 . The heterocyclic compound of claim 1 , wherein Chemical Formula 1 is represented by any one of the following compounds:

3 . An organic light emitting device comprising:

a first electrode;

a second electrode; and

one or more organic material layers provided between the first electrode and the second electrode,

wherein one or more layers of the organic material layers comprise the heterocyclic compound of claim 1 .

4 . The organic light emitting device of claim 3 , wherein the organic material layer comprises an electron transfer layer, and the electron transfer layer comprises the heterocyclic compound.

5 . The organic light emitting device of claim 3 , wherein the organic material layer comprises a hole blocking layer, and the hole blocking layer comprises the heterocyclic compound.

6 . The organic light emitting device of claim 3 , comprising:

the first electrode;

a first stack provided on the first electrode and comprising a first light emitting layer;

a charge generation layer provided on the first stack;

a second stack provided on the charge generation layer and comprising a second light emitting layer; and

the second electrode provided on the second stack.

7 . The organic light emitting device of claim 6 , wherein the charge generation layer comprises the heterocyclic compound.