Polymer, coating composition comprising same, and organic light emitting diode using same

1. A polymer comprising:

a first unit represented by the following Formula 1; and

a second unit represented by the following Formula 2:

in Formulae 1 and 2,

X is a curing group,

L1 to L5 are the same as or different from each other, and are each independently a direct bond; —O—; a substituted or unsubstituted alkylene group; a substituted or unsubstituted arylene group; a substituted or unsubstituted divalent amine group; or a substituted or unsubstituted heteroarylene group,

b1 and b2 are the same as or different from each other, and are each independently an integer from 1 to 10,

when b1 and b2 are each 2 or more, two or more L1s and L5s are each the same as or different from each other,

Ar1 and Ar2 are the same as or different from each other, and are each independently a substituted or unsubstituted aryl group,

R1 to R9 are the same as or different from each other, and are each independently hydrogen; deuterium; a halogen group; a hydroxyl group; a nitrile group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heterocyclic group,

r4 is an integer from 1 to 5,

r5 is an integer from 1 to 4,

r6 is an integer from 1 to 3,

when r4 to r6 are each 2 or more, two or more R4s to R6s are each the same as or different from each other,

m1 is a mole fraction and 0<m1<1,

m2 is a mole fraction and 0<m2<1, and

m1+m2≤1.

2. The polymer of claim 1 , wherein X is any one selected from the following structures:

in the structures,

L11 is a substituted or unsubstituted alkylene group; or a substituted or unsubstituted arylene group, and

R10 to R13 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.

3. The polymer of claim 1 , wherein the first unit represented by Formula 1 is represented by any one of the following structures:

in the structures,

m1 is a mole fraction and 0<m1<1.

4. The polymer of claim 1 , wherein the second unit represented by Formula 2 is represented by any one of the following structures:

in the structures,

m2 is a mole fraction and 0<m2<1.

5. The polymer of claim 1 , wherein the polymer comprising the first unit represented by Formula 1 and the second unit represented by Formula 2 is any one selected from the following structures:

in the structures,

m1 is a mole fraction and 0<m1<1,

m2 is a mole fraction and 0<m2<1,

m1+m2≤1, and

n is a repeating number of the unit, and an integer from 1 to 10,000.

6. The polymer of claim 1 , wherein the polymer has a number average molecular weight of 5,000 g/mol to 1,000,000 g/mol.

7. A coating composition comprising the polymer according to claim 1 .

8. The coating composition of claim 7 , further comprising:

a p-doping material.

9. An organic light emitting device comprising:

a first electrode;

a second electrode provided to face the first electrode; and

an organic material layer having at least one layer provided between the first electrode and the second electrode,

wherein the at least one layer comprises a cured product of the coating composition of claim 7 .

10. The organic light emitting device of claim 9 , wherein the cured product of the coating composition is in a state in which the coating composition is cured by a heat treatment or a light treatment.

11. The organic light emitting device of claim 9 , wherein the at least one layer comprising the cured product of the coating composition is a hole transport layer, a hole injection layer, or a layer which simultaneously transports and injects holes.

12. The organic light emitting device of claim 9 , wherein the at least one layer comprising the cured product of the coating composition comprises a light emitting layer, and the light emitting layer comprises the cured product of the coating composition.

13. The polymer of claim 1 , wherein in Formulae 1 and 2, m1>m2.

14. The polymer of claim 1 , wherein in Formula 2, X is cyclobutabenzene or oxetane.

15. The coating composition of claim 7 , further comprising a solvent having a boiling point of 40° C. to 250° C.

16. A method for manufacturing an organic light emitting device, the method comprising:

preparing a substrate;

forming a cathode or an anode on the substrate;

forming an organic material layer having at least one layer on the cathode or the anode; and

forming an anode or a cathode on the organic material layer,

wherein the at least one layer is formed by using the coating composition of claim 7 .

17. The method of claim 16 , wherein the at least one layer is formed by a printing method.

18. The method of claim 16 , wherein the forming the organic material layer on the cathode or the anode comprises:

coating the cathode or the anode with the coating composition; and

subjecting the coating composition to a heat treatment or a light treatment.