Organic light emitting device

1. An organic light emitting device comprising:

a first electrode;

a hole transport layer;

a first light emitting layer;

a second light emitting layer;

a third light emitting layer;

an electron transport layer; and

a second electrode,

wherein the first light emitting layer comprises a 1-1 host and a 1-2 host,

the second light emitting layer comprises a 2-1 host and a 2-2 host,

the hole transport layer comprises the same material as the 1-1 host,

the 1-1 host and the 2-2 host are different materials from each other,

wherein the third light emitting layer is disposed between the second light emitting layer and the electron transport layer, and comprises a 3-1 host and a 3-2 host,

the 1-2 host, the 2-1 host and the 3-1 host are the same materials, and

wherein the 1-2 host is a compound represented by Chemical Formula 2:

in Chemical Formula 2,

Ar 5 and Ar 6 are each independently a substituted or unsubstituted C 6-60 aryl.

2. The organic light emitting device of claim 1 ,

wherein the 1-1 host is a compound represented by Chemical Formula 1:

in Chemical Formula 1,

R 1 and R 2 are each independently hydrogen; deuterium; halogen; nitrile; nitro; amino; a substituted or unsubstituted C 1 -60 alkyl; a substituted or unsubstituted C 3-60 cycloalkyl; a substituted or unsubstituted C 2-60 alkenyl; a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heterocyclic group containing at least one of 0, N, Si and S,

L 1 and L 2 are each independently a bond, or a substituted or unsubstituted C 6-60 arylene, and

Ar 1 and Ar 2 are each independently a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2 -60 heteroaryl containing at least one of 0, N, Si and S.

3. The organic light emitting device of claim 2 ,

wherein the compound represented by the Chemical Formula 1 is any one selected from the group consisting of:

4. The organic light emitting device of claim 1 ,

wherein the 1-1 host is a compound represented by Chemical Formula 1′:

in Chemical Formula 1′,

R 3 and R 4 are each independently hydrogen; deuterium; halogen; nitrile; nitro; amino; a substituted or unsubstituted C 1 -60 alkyl; a substituted or unsubstituted C 3-60 cycloalkyl; a substituted or unsubstituted C 2-60 alkenyl; a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heterocyclic group containing at least one of 0, N, Si and S,

L 3 is a bond, or a substituted or unsubstituted C 6 -60 arylene, and

Ar 3 and Ar 4 are each independently a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2 -60 heteroaryl containing at least one of 0, N, Si and S.

5. The organic light emitting device of claim 4 ,

wherein the compound represented by the Chemical Formula 1′ is a following compound:

6. The organic light emitting device of claim 1 ,

wherein the compound represented by the Chemical Formula 2 is any one selected from the group consisting of:

7. The organic light emitting device of claim 1 ,

wherein the 2-2 host is a compound represented by Chemical Formula 3:

in Chemical Formula 3,

L 4 is a bond; a substituted or unsubstituted C 6-60 arylene; or a substituted or unsubstituted C 2-60 heteroarylene containing at least one of 0, N, Si and S,

Ar 7 and Ar 8 are each independently a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heteroaryl containing at least one of 0, N, Si and S, and

Ar 9 is a substituted or unsubstituted C 2-60 heteroaryl containing at least one N.

8. The organic light emitting device of claim 7 ,

wherein the compound represented by the Chemical Formula 3 is any one selected from the group consisting of:

9. The organic light emitting device of claim 2 ,

wherein the 3-2 host is a compound represented by Chemical Formula 3:

in Chemical Formula 3,

L 4 is a bond; a substituted or unsubstituted C 6-60 arylene; or a substituted or unsubstituted C 2 -60 heteroarylene containing at least one of O, N, Si and S,

Ar 7 and Ar 8 are each independently a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heteroaryl containing at least one of O, N, Si and S, and

Ar 9 is a substituted or unsubstituted C 2-60 heteroaryl containing at least one N.

10. The organic light emitting device of claim 9 ,

wherein the compound represented by the Chemical Formula 3 is any one selected from the group consisting of:

11. The organic light emitting device of claim 1 ,

wherein the first light emitting layer further comprises a compound represented by Chemical Formula 4:

in Chemical Formula 4,

n1 is 1 or 2,

R 5 to R 8 are each independently hydrogen; a substituted or unsubstituted C 1-60 alkyl; or a substituted or unsubstituted C 6-60 aryl; provided that one or more of R 5 to R 8 are a branched alkyl containing 4 or more carbons, and

X—Y is an auxiliary ligand.

12. The organic light emitting device of claim 1 ,

wherein the second light emitting layer further comprises a compound represented by Chemical Formula 5:

in Chemical Formula 5,

n2 is 1 or 2,

a is an integer of 0 to 4, and

Ar 10 and Ar 11 are each independently a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heteroaryl containing at least one of O, N, Si and S.

13. The organic light emitting device of claim 2 ,

wherein the third light emitting layer further comprises a compound represented by Chemical Formula 6:

in Chemical Formula 6,

n3 is 1 or 2, and

R 8 to R 11 are each independently hydrogen; deuterium; halogen; nitrile; nitro; amino; a substituted or unsubstituted C 1 -60 alkyl; a substituted or unsubstituted C 3-60 cycloalkyl; a substituted or unsubstituted C 2-60 alkenyl; a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heterocyclic group containing at least one of O, N, Si and S.