Ink composition for organic light emitting device

1. An ink composition for an organic light emitting device comprising:

a compound represented by the following Chemical Formula 1,

a compound represented by the following Chemical Formula 2, and

a solvent:

in Chemical Formula 1,

L and L 1 to L 4 are each independently a substituted or unsubstituted C 6-60 arylene,

Ar 1 and Ar 2 are each independently a substituted or unsubstituted C 6-60 aryl,

R 1 to R 4 are each independently hydrogen, deuterium, a substituted or unsubstituted C 1-60 alkyl, a substituted or unsubstituted C 1-60 alkoxy, a substituted or unsubstituted C 6-60 aryl, or a substituted or unsubstituted C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of N, O and S,

Y 1 to Y 4 are each independently hydrogen, or —X-A, with the proviso that two or more of Y 1 to Y 4 are —X-A,

X is O or S,

A is a functional group which can be crosslinked by heat or light,

n1 and n4 are each an integer of 0 to 4,

n2 and n3 are each an integer of 0 to 3,

in Chemical Formula 2,

R is C 3-60 alkyl; C 3-60 alkenyl; or phenyl substituted with C 3-60 alkyl, and

n is an integer of 4 to 20.

2. The ink composition according to claim 1 ,

wherein A is any one selected from the group consisting of the following:

wherein,

T 1 is hydrogen; or a substituted or unsubstituted C 1-60 alkyl, and

T 2 to T 4 are each independently a substituted or unsubstituted C 1-6 alkyl.

3. The ink composition according to claim 1 ,

wherein the Chemical Formula 1 is represented by any one of the following Formulas 1-1 to 1-4:

in Chemical Formulas 1-1 to 1-4,

R 1 to R 4 , n1 to n4, Ar 1 , Ar 2 and L are as defined in Chemical Formula 1 of claim 1 ,

X 1 to X 4 are each independently O or S,

A 1 to A 4 are each independently a functional group that can be crosslinked by heat or light,

R 21 to R 26 are each independently hydrogen, deuterium, a substituted or unsubstituted C 1-60 alkyl, a substituted or unsubstituted C 1-60 alkoxy, a substituted or unsubstituted C 6-60 aryl, or a substituted or unsubstituted C 2-60 heteroaryl containing any one or more heteroatoms selected from the group consisting of N, O and S, and

p1 and p2 are each an integer of 0 to 5,

p3 and p4 are each an integer of 0 to 4, and

p5 and p6 are each an integer of 0 to 7.

4. The ink composition according to claim 1 ,

wherein L is the following Chemical Formula 1-A or 1-B:

in Chemical Formulas 1-A and 1-B,

R 11 to R 13 are each independently hydrogen, deuterium, a substituted or unsubstituted C 1-60 alkyl, a substituted or unsubstituted C 1-60 alkoxy, a substituted or unsubstituted C 6-60 aryl, or a substituted or unsubstituted C 2-60 heteroaryl containing any one or more heteroatoms selected from the group consisting of N, O and S, and

m1 to m3 are each an integer of 0 to 4.

5. The ink composition according to claim 1 ,

wherein the Chemical Formula 1 is any one selected from the group consisting of the following:

6. The ink composition according to claim 1 ,

wherein R is C 10-20 alkyl; C 10-20 alkenyl; or phenyl substituted with C 10-20 alkyl.

7. The ink composition according to claim 1 ,

wherein the compound represented by Chemical Formula 2 is included in an amount of 0.05 to 1% by weight relative to the total weight of the ink composition.

8. The ink composition according to claim 1 ,

wherein the solvent has a boiling point of 180° C. or more.

9. The ink composition according to claim 1 ,

wherein the solvent is aliphatic esters, aromatic esters, aliphatic ethers, aromatic ethers, aliphatic hydrocarbons, aromatic hydrocarbons, aliphatic alcohols, aromatic alcohols, or glycol ethers.

10. The ink composition according to claim 1 ,

wherein the solvent is triethylene glycol monobutyl ether, diethylene glycol dibutyl ether, tetraethylene glycol dimethyl ether, tetraethylene glycol n-butyl ether, triethylene glycol monoisopropyl ether, diethylene glycol monohexyl ether, triethylene glycol monomethyl ether, diethylene glycol monobutyl ether acetate, diethylene glycol monoisobutyl ether, dipropylene glycol n-butyl ether, 3-phenoxytoluene, dibenzyl ether, bis(methoxymethyl)benzene, isoamylbenzoate, isoamyl octanoate, decylbenzene, 1-methoxynaphthalene, phenethyl octanoate, 1,3-dimethoxybenzene, ethyl 4-methoxybenzoate, hexyl benzoate, 1-ethylnaphthalene, cyclohexylbenzene, octylbenzene, 2-ethylnaphthalene, benzyl butyrate, p-anisaldehyde dimethyl acetal, 3-phenyl-1-propanol, p-propylanisole, ethyl benzoate, butyl phenyl ether, 3,4-dimethylanisole, ethylene glycol monobenzyl ether, diethylene glycol monophenyl ether, dibutyl oxalate, or 3-phenoxybenzyl alcohol.

11. The ink composition according to claim 1 ,

further comprising a p-type doping material.

12. The ink composition according to claim 11 ,

wherein the p-type doping material is represented by any one of the following Chemical Formulas A to H: