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

Patent metadata

Field	Value
Publication number	US-11374175-B2
Application number	US-201916652485-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Jan 24, 2018
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

The present disclosure relates to a polymer including a unit represented by Chemical Formula 1, 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:

wherein, in Chemical Formula 1,
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 (Y2) i -Y3-;
Y3 is a substituted or unsubstituted arylene group; or a substituted or unsubstituted alkylene group;
each Y2 is independently 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, and (Y2) i contains at least one —O—;
R1 to R5 are the same as or different from each other, and each independently hydrogen, or a substituted or unsubstituted alkyl group; and
l 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.

2. The polymer of claim 1 , wherein the polymer including the unit represented by Chemical Formula 1 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 L1 and L2 are the same as or different from each other, and each independently a direct bond; or a phenylene group.

5. The polymer of claim 1 , wherein Y3 is 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—.

6. 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.

7. The polymer of claim 6 , wherein R and R′ are the same as or different from each other, and each independently a methylene group; an ethylene group; a propylene group; a butylene group; a pentylene group; or a hexylene group.

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

in the structural formulae, n is the number of a repetition unit, and is from 10 to 1000; and
an end group of the polymer is hydrogen; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group.

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

10. The coating composition of claim 9 , which is for an organic light emitting device.

11. An organic light emitting device comprising:
a first electrode;
a second electrode provided opposite to the first electrode; and
at least one organic material layer provided between the first electrode and the second electrode,
wherein the at least one organic material layer includes the coating composition of claim 9 .

12. The organic light emitting device of claim 11 , wherein the at least one organic material layer including 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.

13. The organic light emitting device of claim 12 , wherein the coating composition further includes a p-doping material.

14. The organic light emitting device of claim 13 , wherein the p-doping material includes a boron anion or

15. The coating composition of claim 9 , further comprising a solvent wherein the solvent has a boiling point of 40° C. to 250° C., and a viscosity of from 1 cp to 10 cp.

16. The coating composition of claim 9 , wherein the polymer including the unit represented by Chemical Formula 1 in the coating composition has a concentration of 0.1 wt/v % to 20 wt/v %.

17. The polymer of claim 1 , wherein Ar1 is a phenyl group unsubstituted or substituted with a halogen group, an alkyl group or an arylamine group; a biphenyl group unsubstituted or substituted with an arylamine group; or a fluorene group unsubstituted or substituted with an alkyl group.

18. The polymer of claim 1 , wherein Ar2 to Ar5 are the same as or different from each other, and each independently a phenyl group unsubstituted or substituted with an arylamine group; a biphenyl group unsubstituted or substituted with an arylamine group; or a fluorene group unsubstituted or substituted with an alkyl group, or Ar2 and Ar3 bond to form a carbazole ring, and Ar4 and Ar5 bond to form a carbazole group.

19. 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 one or more organic material layers on the cathode or the anode; and
forming an anode or a cathode on the one or more organic material layers, wherein the one or more organic material layers are formed using the coating composition of claim 9 .

20. The method of claim 19 , wherein the forming of the one or more organic material layers using the coating composition comprises coating the coating com

Assignees

• Lg Chemical Ltd

Inventors

• Seo Minseob
• Kang Esder
• Bae Jaesoon
• Kim Hwakyung
• Lee Keunsoo
• Jung Sejin
• Lee Jaechol

Classifications

• H10K85/115

  Polyfluorene; Derivatives thereof · CPC title

• C08F112/22 Primary

  Oxygen · CPC title

• C08F112/26

  Nitrogen · CPC title

• C09D125/18

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

• C09D5/24

  Electrically-conducting paints {(conductive materials H01B1/00)} · CPC title