Polymer, coating composition comprising same, and organic light-emitting device using same

Patent metadata

Field	Value
Publication number	US-11472901-B2
Application number	US-201916652294-A
Country	US
Kind code	B2
Filing date	Jan 21, 2019
Priority date	Jan 24, 2018
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

The present disclosure relates to a polymer including a unit represented by Chemical Formula 1 and a unit represented by Chemical Formula 2, a coating composition including the polymer, and an organic light emitting device formed using the same.

First claim

The invention claimed is:

1. A polymer comprising:
a unit represented by the following Chemical Formula 1; and
a unit represented by the following Chemical Formula 2:

wherein, in Chemical Formulae 1 and 2,
Ar1 to Ar5 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group;
Ar2 and Ar3 are optionally bond to each other to form a substituted or unsubstituted heteroring;
Ar4 and Ar5 are optionally bond to each other to form a substituted or unsubstituted heteroring;
L1 and L2 are the same as or different from each other, and each independently a direct bond; or a substituted or unsubstituted arylene group;
Y is —Y1- or —(Y2) i -Y3-;
Y1 and Y3 are the same as or different from each other, and each independently a substituted or unsubstituted arylene group; or a substituted or unsubstituted alkylene group;
Y2 is a substituted or unsubstituted arylene group; a substituted or unsubstituted alkylene group; or —O—;
i is an integer of 1 to 8, and when i is 2 or greater, Y2s are the same as or different from each other;
Y2 bonding to Y3 is different from Y3, and when there are two or more Y2s, adjacent Y2s are different from each other;
R1 to R8 are the same as or different from each other, and each independently hydrogen, or a substituted or unsubstituted alkyl group;
L3 is a direct bond; a substituted or unsubstituted arylene group; a substituted or unsubstituted alkylene group; a substituted or unsubstituted alkyleneoxy group; or a substituted or unsubstituted divalent arylamine group;
1 and k are the same as or different from each other, and each independently an integer of 0 to 3, and when 1 is 2 or greater, R1s are the same as or different from each other, and when k is 2 or greater, R2s are the same as or different from each other;
j is an integer of 1 to 3, and when j is 2 or greater, L3s are the same as or different from each other;
X is a curing group;
n and m mean a molar ratio in the polymer; and
0<n<1, 0<m<1, and m+n≤1.

2. The polymer of claim 1 , wherein the polymer including the unit represented by Chemical Formula 1 and the unit represented by Chemical Formula 2 has a number average molecular weight of 1,000 g/mol to 300,000 g/mol.

3. The polymer of claim 1 , wherein Ar1 to Ar5 are the same as or different from each other, and each independently a substituted or unsubstituted phenyl group; a substituted or unsubstituted biphenyl group; or a substituted or unsubstituted fluorene group.

4. The polymer of claim 1 , wherein L3 is a direct bond; a phenylene group unsubstituted or substituted with one, two or more substituents selected from the group consisting of an alkyl group, an alkoxy group and an arylamine group; or a divalent arylamine group.

5. The polymer of claim 1 , wherein L1 and L2 are the same as or different from each other, and each independently a direct bond; or a phenylene group.

6. The polymer of claim 1 , wherein Y1 and Y3 are the same as or different from each other, and each independently a substituted or unsubstituted phenylene group; or
a substituted or unsubstituted biphenylylene group; and
Y2s are the same as or different from each other, and each independently a substituted or unsubstituted phenylene group; a substituted or unsubstituted biphenylylene group; a substituted or unsubstituted methylene group; a substituted or unsubstituted ethylene group; a substituted or unsubstituted propylene group; a substituted or unsubstituted butylene group; a substituted or unsubstituted pentylene group; a substituted or unsubstituted hexylene group; or —O—.

7. The polymer of claim 1 , wherein Y is selected from among the following structural formulae:

in the structural formulae, R and R′ are the same as or different from each other, and each independently a substituted or unsubstituted alkylene group.

8. The polymer of claim 1 , wherein the curing group is selected from among the following structural formulae:

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

and

means a site bonding to L3.

9. The polymer of claim 1 , wherein n is 0.6≤n<1, and m is 0<m≤0.4.

10. The polymer of claim 1 , wherein the polymer including the unit represented by Chemical Formula 1 and the unit represented by Chemical Formula 2 is selected from among the following structural formulae:

11. A coating composition comprising the polymer of claim 1 .

12. The coating composition of claim 11 , which is for an organic light emitting device.

13. An organic light emitting device comprising:
a first electrode;
a second electrode provided opposite to the first electrode; and
at least one organic material layers provided between the first electrode and the second electrode,
wherein the at least one organic material layer includes a cured material of the coating composition of claim 11 .

14. The organic light emitting device of claim 13 , wherein the cured material of the coating composition is in a cured state by heat treating or light treating the coating composition.

15. The organic light emitting device of claim 13 , wherein the at least one organic material layer including the cured material of the coating composition is a hole transfer layer, a hole injection layer, or a layer carrying out hole transfer and hole injection at the same time.

16. The organic light emitting device of claim 15 , wherein the coating composition further includes a p-doping material.

17. The organic light emitting device of claim 16 , wherein the p-doping material includes F 4 TCNQ; or a boron anion.

Assignees

• Lg Chemical Ltd

Inventors

• Seo Minseob
• Kang Esder
• Bae Jaesoon
• Shin Jiyeon
• Jung Sejin
• Park Hyungil
• Lee Jaechol

Classifications

• C08F212/24

  Phenols or alcohols · CPC title

• C08F212/26

  Nitrogen · CPC title

• C08F212/32 Primary

  containing two or more rings · CPC title

• C09D125/18

  Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen · CPC title

• C08F212/22 Primary

  Oxygen · CPC title