Organic light emitting device

1. An organic light emitting device comprising:

a first electrode;

a second electrode provided opposite to the first electrode; and

an organic material provided between the first electrode and the second electrode,

wherein the organic material includes a hole transfer layer and an electron blocking layer, and the hole transfer layer and the electron blocking layer include a compound of the following Chemical Formula 1;

the materials of the hole transfer layer and the electron blocking layer are different from each other; and

the organic material further comprising one or more layers that are neither the hole transfer layer nor the electron blocking layer include a compound of the following Chemical Formula 2:

in Chemical Formula 1,

Ar 1 and Ar 2 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group including one or two 6-membered rings, or a substituted or unsubstituted heteroaryl group;

a and b are the same as or different from each other, and each independently a substituted or unsubstituted aromatic ring;

X 1 and X 2 are the same as or different from each other, and each independently a direct bond or CRR′; and

when one of X 1 and X 2 is a direct bond, the other one is CRR′,

in Chemical Formula 2,

Ar3 is a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;

L is a substituted or unsubstituted arylene group;

R, R′, R 1 and R 2 are the same as or different from each other, and each independently hydrogen, deuterium, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or bond to adjacent substituents to form a substituted or unsubstituted hydrocarbon ring;

a is an integer of 0 to 8;

b is an integer of 0 to 7;

when a is a plural number, R 1S are the same as or different from each other; and

when b is a plural number, R 2S are the same as or different from each other.

2. The organic light emitting device of claim 1 , wherein Chemical Formula 1 is the following Chemical Formula 1-1:

in Chemical Formula 1-1,

Ar 1 , Ar 2 , X 1 and X 2 have the same definitions as in Chemical Formula 1.

3. The organic light emitting device of claim 1 , wherein the electron blocking layer includes a compound of the following Chemical Formula 1-2 or Chemical Formula 1-3:

in Chemical Formula 1-2 and Chemical Formula 1-3,

Ar 1 , Ar 2 , X 1 and X 2 have the same definitions as in Chemical Formula 1.

4. The organic light emitting device of claim 1 , wherein the hole transfer layer includes a compound of the following Chemical Formula 1-4 or Chemical Formula 1-5:

in Chemical Formula 1-4 and Chemical Formula 1-5,

Ar 1 , Ar 2 , X 1 and X 2 have the same definitions as in Chemical Formula 1.

5. The organic light emitting device of claim 1 , wherein the one or more organic material layers including the compound of Chemical Formula 2 are light emitting layers.

6. The organic light emitting device of claim 5 , wherein Chemical Formula 2 is the following Chemical Formula 2-1 or 2-2:

in Chemical Formulae 2-1 and 2-2,

Ar 3 , a, b, R 1 and R 2 have the same definitions as in Chemical Formula 2.

7. The organic light emitting device of claim 5 , wherein Chemical Formula 2 is the following Chemical Formula 2-3 or 2-4:

in Chemical Formulae 2-3 and 2-4,

Ar 3 , a, b, R 1 and R 2 have the same definitions as in Chemical Formula 2.

8. The organic light emitting device of claim 1 , wherein the organic material includes a light emitting layer, and triplet energy of the electron blocking layer is larger than triplet energy of a host of the light emitting layer.

9. The organic light emitting device of claim 1 , wherein Chemical Formula 1 is any one of the following compounds:

10. The organic light emitting device of claim 1 , wherein Chemical Formula 2 is any one of the following compounds: