Polymer

Patent metadata

Field	Value
Publication number	US-10870726-B2
Application number	US-201616063635-A
Country	US
Kind code	B2
Filing date	Dec 15, 2016
Priority date	Dec 18, 2015
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

A polymer comprising a repeat unit of formula (I): (I) wherein each Ar 1 and each Ar 2 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; each Cy independently represents a saturated heterocyclic or carbocyclic ring that may be unsubstituted or substituted with one or more substituents; n is 1, 2 or 3; and adjacent groups Ar 2 may be linked by a divalent linking group in the case where n is 2 or 3. The polymer may be used as a charge-transporting material or light-emitting material in an organic light-emitting device.

First claim

The invention claimed is:

1. A polymer comprising a repeat unit of formula (I):

wherein each Ar 1 and each Ar 2 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; each Cy independently represents a saturated heterocyclic or carbocyclic ring that may be unsubstituted or substituted with one or more substituents; n is 1, 2 or 3; and adjacent groups Ar 2 may be linked by a divalent linking group in the case where n is 2 or 3.

2. A polymer according to claim 1 wherein the divalent linking group is selected from C 1-10 alkylene; and a saturated monocyclic or polycyclic carbocyclic ring that may be unsubstituted or substituted with one or more substituents.

3. A polymer according to claim 1 wherein n is 2.

4. A polymer according to claim 2 wherein —(Ar 2 )n— is a group of formula (II) that may be unsubstituted or substituted with one or more substituents:

wherein — represents a bond to N of formula (I).

5. A polymer according to claim 1 wherein each Ar 2 is independently phenyl that may be unsubstituted or substituted with one or more substituents.

6. A polymer according to claim 1 wherein Cy is a saturated carbocyclic ring.

7. A polymer according to claim 6 wherein Cy is cyclohexane.

8. A polymer according to claim 1 wherein Ar 1 is unsubstituted or substituted phenyl.

9. A polymer according to claim 1 wherein the polymer has a photoluminescence spectrum with a peak of less than or equal to 480 nm.

10. A polymer according to claim 1 comprising one or more co-repeat units.

11. A polymer according to claim 10 wherein the repeat units of formula (I) form 0.5-25 mol % of repeat units of the polymer.

12. A polymer according to claim 10 wherein the co-repeat units comprise one or more C 6-20 arylene co-repeat units that may each independently be unsubstituted or substituted with one or more substituents.

13. A monomer of formula (III):

wherein each Ar 1 and each Ar 2 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; each Cy independently represents a saturated heterocyclic or carbocyclic ring that may be unsubstituted or substituted with one or more substituents; n is 1, 2 or 3; and adjacent groups Ar 2 may be linked by a divalent linking group in the case where n is 2 or 3, and each L represents a reactive leaving group.

14. A monomer according to claim 13 wherein each L is independently selected from the group consisting of halogen; boronic acids and esters thereof; and sulfonic acid esters.

15. A method of forming a polymer comprising the step of polymerising a monomer according to claim 13 .

16. An organic electronic device comprising a semiconductor layer wherein the semiconductor layer comprises a polymer according to claim 1 .

17. An organic electronic device according to claim 16 wherein the device is an organic light-emitting device comprising the semiconductor layer between an anode and a cathode.

18. An organic electronic device according to claim 17 wherein the semiconductor layer is a light-emitting layer.

19. A formulation comprising a polymer according to claim 1 and at least one solvent.

20. A method of forming an organic electronic device according to claim 16 , the method comprising the step of forming the semiconducting layer by depositing a formulation comprising the polymer and at least one solvent, and evaporating the at least one solvent.

Assignees

• Cambridge Display Tech Ltd
• Sumitomo Chemical Co

Inventors

• Kamtekar Kiran
• Bourcet Florence
• Pintani Martina

Classifications

• C08G2261/314

  Condensed aromatic systems, e.g. perylene, anthracene or pyrene · CPC title

• C08G2261/148

  Side-chains having aromatic units · CPC title

• C08G2261/1412

  Saturated aliphatic units · CPC title

• C08G2261/122

  statistical · CPC title

• C08G61/12

  Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule · CPC title