Organic light-emitting device including a heteroaryl compound

1. An organic light emitting device comprising:

a first electrode;

a second electrode provided to face the first electrode; and

one or two 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 a compound represented by the following Chemical Formula 1:

(HAr) a [L1-Ar1-L2-(CN) b ] c   [Chemical Formula 1]

in Chemical Formula 1,

a to c are each an integer of 1 to 3,

when a to c are each 2 or more, two or more structures in the parenthesis are the same as or different from each other,

L1 and L2 are the same as or different from each other, and are each independently a substituted or unsubstituted divalent to tetravalent aromatic ring group,

Ar1 is a direct bond; or a substituted or unsubstituted arylene group, and

HAr is a heteroaryl group represented by the following Chemical Formula A or B;

in Chemical Formulae A and B,

X1 to X3 are the same as or different from each other, and are each independently N, CH or CD,

at least two of X1 to X3 is N,

Ar2, Ar3, and R1 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted aryl group, or combine with an adjacent group to form a substituted or unsubstituted ring,

n is an integer of 1 to 7,

when n is 2 or more, two or more R1's are the same as or different from each other, and

--- is a moiety linked to L1,

wherein in Chemical Formula 1, when HAr is Chemical Formula A, and b is 2, Ar1 is not a direct bond, and

when HAr is Chemical Formula B, c is 1.

2. The organic light emitting device of claim 1 , wherein Chemical Formula 1 is represented by the following Chemical Formula 2 or 3:

in Chemical Formulae 2 and 3,

the definitions of a, b, c, L1, L2, and Ar1 are the same as those in Chemical Formula 1,

the definitions of X1 to X3, Ar2, Ar3, R1 and n are the same as those in Chemical Formulae A and B.

3. The organic light emitting device of claim 1 , wherein Chemical Formula 1 is represented by any one of the following Chemical Formulae 2-1 to 2-3:

in Chemical Formulae 2-1 to 2-3,

the definitions of b, c, L1, L2, and Ar1 are the same as those in Chemical Formula 1,

the definitions of X1 to X3, Ar2, and Ar3 are the same as those in Chemical Formula A,

X4 to X9 are the same as or different from each other, and are each independently N, CH or CD,

at least two of X4 to X6 is N,

at least two of X7 to X9 is N, and

Ar4 to Ar7 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted aryl group, or combine with an adjacent group to form a substituted or unsubstituted ring.

4. The organic light emitting device of claim 1 , wherein Chemical Formula 1 is represented by any one of the following Chemical Formulae 3-1 to 3-3:

in Chemical Formulae 3-1 to 3-3,

the definitions of b, c, L1, L2, and Ar1 are the same as those in Chemical Formula 1,

the definitions of R1 and n are the same as those in Chemical Formula B,

R2 and R3 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted aryl group, or combine with an adjacent group to form a substituted or unsubstituted ring,

m and p are each an integer of 1 to 7, and

when m and p are each 2 or more, two or more structures in the parenthesis are the same as or different from each other.

5. The organic light emitting device of claim 1 , wherein Chemical Formula A is represented by any one of the following Chemical Formulae A-4 to A-7:

in Chemical Formulae A-4 to A-7,

the definitions of Ar2 and Ar3 are the same as those in Chemical Formula A, and

--- is a moiety linked to L1.

6. The organic light emitting device of claim 1 , wherein Chemical Formula B is represented by any one of the following Chemical Formulae B-1 to B-4:

in Chemical Formulae B-1 to B-4,

the definitions of R1 and n are the same as those in Chemical Formula B, and

--- is a moiety linked to L1.

7. The organic light emitting device of claim 1 , wherein L1 and L2 are the same as or different from each other, and are each independently a substituted or unsubstituted divalent to tetravalent phenyl group; a substituted or unsubstituted divalent to tetravalent biphenyl group; a substituted or unsubstituted divalent to tetravalent terphenyl group; or a substituted or unsubstituted divalent to tetravalent fluorenyl group.

8. The organic light emitting device of claim 1 , wherein Ar1 is a direct bond; a substituted or unsubstituted phenylene group; a substituted or unsubstituted biphenylylene group; or a substituted or unsubstituted naphthylene group.

9. The organic light emitting device of claim 1 , wherein Ar2 and Ar3 are the same as or different from each other, and are each independently a substituted or unsubstituted phenyl group; or a substituted or unsubstituted biphenyl group.

10. The organic light emitting device of claim 1 , wherein Ar2 and Ar3 are the same as or different from each other, and are each independently a phenyl group; or a biphenyl group.

11. The organic light emitting device of claim 1 , wherein Chemical Formula 1 is selected from any one of the following compounds

12. The organic light emitting device of claim 1 , wherein the organic material layer comprises a light emitting layer, and the light emitting layer comprises the compound.

13. The organic light emitting device of claim 1 , wherein the organic material layer comprises a hole blocking layer, and the hole blocking layer comprises the compound.

14. The organic light emitting device of claim 1 , wherein the organic material layer comprises an electron transporting layer, an electron injection layer, or a layer which simultaneously transports and injects electrons, and the electron transporting layer, the electron injection layer, or the layer which simultaneously transports and injects electrons comprises the compound.