Organic light-emitting device

1. An organic light-emitting device comprising:

a first electrode;

a second electrode facing the first electrode; and

an organic layer comprising an emission layer disposed between the first electrode and the second electrode,

wherein the emission layer comprises at least one selected from the group consisting of compounds represented by Formula 1 and at least one selected from the group consisting of compounds represented by Formula 3:

wherein, in Formulae 1 and 3,

R 11 is a phenyl group;

a11 is an integer of 1;

X is a sulfur atom;

R 12 and R 13 are each a hydrogen atom;

n11 is an integer of 2 or 3;

L is represented by:

and

wherein * is a binding site with Ir;

m is an integer of 0 or 1;

Ar 31 is a pyrimidyl;

Ar 32 is selected from the group consisting of

i) a dibenzofuranylene group;

ii) a phenyl group; and

iii) carbazolylene group substituted with one phenyl group;

n31 and n32 are each an integer of 0;

R 31 and R 32 are each independently selected from the group consisting of a hydrogen atom and a phenyl group; and

a31 is 3;

a32 to a34 are each an integer of 1.

2. The organic light-emitting device of claim 1 , wherein the compound represented by Formula 1 is one of Compounds 101 to 103:

3. The organic light-emitting device of claim 1 , wherein

Ar 32 are each independently selected from the group consisting of

i) a dibenzofuranylene group; and

ii) a phenyl group.

4. The organic light-emitting device of claim 1 , wherein the compound represented by Formula 3 is represented by Formula 3b:

wherein, in Formula 3b,

Y 31 is N(Ar 321 ), or C(Ar 322 )(Ar 323 );

Ar 31 is a pyrimidyl, Ar 32i is a phenyl group, Ar 322 , and Ar 323 are each a methyl group;

R 32 is selected from the group consisting of a hydrogen atom and a phenyl group; and

a33 is an integer of 1.

5. The organic light-emitting device of claim 1 , wherein the compound represented by Formula 3 is selected from the group consisting of Compounds 201 to 203:

6. An organic light-emitting device comprising:

a first electrode;

a second electrode facing the first electrode;

an organic layer comprising an emission layer disposed between the first electrode and the second electrode,

wherein the emission layer comprises a hole transporting region disposed between the first electrode and the emission layer, wherein the emission layer comprises at least one selected from the group consisting of compounds represented by Formula 1, wherein the hole transporting region comprises at least one selected from the group consisting of compounds represented by Formula 4:

wherein, in Formulae 1 and 4,

R 11 is a phenyl group;

a11 is an integer of 1;

X is a sulfur atom;

R 12 and R 13 are each a hydrogen atom;

n11 is an integer of 2 or 3;

L is ligand represented by:

wherein * is a binding site with Ir;

m is an integer of 0 or 1;

Z is a nitrogen atom (N);

n41 to n43 are each an integer of 0;

R 71 is a phenyl;

R 72 to R 78 are each a hydrogen atom;

R 81 and R 82 are each CH 3 ;

R 83 to R 89 are each a hydrogen atom; and

Ar 41 is a phenyl.

7. An organic light-emitting device comprising:

a first electrode;

a second electrode facing the first electrode; and

an organic layer comprising an emission layer disposed between the first electrode and the second electrode,

wherein the organic layer comprises a hole transporting region disposed between the first electrode and the emission layer, wherein the emission layer comprises at least one selected from the group consisting of compounds represented by Formula 1 and at least one selected from the group consisting of compounds represented by Formula 3, wherein the hole transporting region comprises at least one selected from the group consisting of compounds represented by Formula 4:

wherein, in Formulae 1, 3 and 4,

R 11 is a phenyl group;

a11 is an integer of 1;

X is a sulfur atom;

R 12 and R 13 are each a hydrogen atom;

n11 is an integer of 2 or 3;

L is represented by:

and

wherein * is a binding site with Ir;

m is an integer of 0 or 1;

Z is a nitrogen atom (N);

Ar 31 is a pyrimidyl;

Ar 32 is selected from the group consisting of

i) a dibenzofuranylene group;

ii) a phenyl group; and

iii) carbazolylene group substituted with one phenyl group;

n31 and n32 are each an integer of 0;

R 31 and R 32 are each a hydrogen atom; and

a31 is 3;

a32 to a34 are each independently an integer of 0 to 4

n41 to n43 are each an integer of 0;

R 71 is a phenyl;

R 72 to R 78 are each a hydrogen atom;

R 81 and R 82 are each CH 3 ;

R 83 to R 89 are each a hydrogen atom; and

Ar 41 is a phenyl.

8. The organic light-emitting device of claim 7 , wherein the compound represented by Formula 4 is Compound 301: