Polymer

Patent metadata

Field	Value
Publication number	US-9293709-B2
Application number	US-201213982728-A
Country	US
Kind code	B2
Filing date	Jan 26, 2012
Priority date	Jan 31, 2011
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A polymer, for use in an organic light emitting device, comprises asymmetrically substituted repeat units of formula (I (a)): wherein R7 represents a substituent bound to the 9-carbon atom of the fluorene ring through a non-aromatic carbon atom, R 8 , R 9 and R 11 independently in each occurrence represent H or a substituent with the proviso that at least one R 8 is not H; R 10 independently in each occurrence is a substituent; and t in each occurrence is independently 0, 1, 2 or 3. R 7 is preferably a linear alkyl substituted with one or more groups —(Ar 6 )w, wherein each Ar 6 independently represents an optionally substituted aryl or heteroaryl group, and w is at least 1, for example 1, 2 or 3.

First claim

The invention claimed is:

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

wherein R 7 represents a substituent directly bound to the 9-carbon atom of the fluorene ring through a non-aromatic carbon atom of R 7 ; R 8 , R 9 and R 11 independently in each occurrence represent H or a substituent with the proviso that at least one R 8 is not H; R 10 independently in each occurrence is a substituent; and t in each occurrence is independently 0, 1, 2 or 3.

2. A polymer according to claim 1 wherein R 7 is a substituted or unsubstituted alkyl.

3. A polymer according to claim 2 wherein the substituted or unsubstituted alkyl is a substituted or unsubstituted linear alkyl.

4. A polymer according to claim 2 wherein R 7 is substituted with one or more substituted or unsubstituted aryl groups.

5. A polymer according to claim 4 wherein the one or more substituted or unsubstituted aryl groups are one or more groups —(Ar 6 ) w , wherein each Ar 6 independently represents a substituted or unsubstituted aryl or heteroaryl group, and w is at least 1.

6. A polymer according to claim 5 wherein w is 1, 2, or 3.

7. A polymer according to claim 1 wherein one R 8 group is H.

8. A polymer according to claim 1 wherein both R 8 groups are not H.

9. A polymer according to claim 1 wherein at least one R 8 is selected from the group consisting of substituted or unsubstituted alkyl and —(Ar 7 ) z , wherein each Ar 7 independently represents a substituted or unsubstituted aryl or heteroaryl group and z is at least 1.

10. A polymer according to claim 9 wherein z is 1, 2, or 3.

11. A polymer according to claim 1 wherein each t is 0.

12. A polymer according to claim 1 wherein R 9 is H.

13. A polymer according to claim 1 wherein R 11 is H.

14. A polymer according to claim 1 comprising a repeat unit of formula (V):

wherein Ar 1 and Ar 2 in each occurrence are independently selected from substituted or unsubstituted aryl or heteroaryl groups, n is greater than or equal to 1, R is H or a substituent, x and y are each independently 1, 2 or 3, and any two of groups Ar 1 , Ar 2 and R may be linked by a direct bond or a divalent linking group to form a ring.

15. A polymer according to claim 14 wherein n is 1 or 2.

16. A polymer according to claim 14 wherein R is a substituent.

17. An organic electronic device comprising a polymer according to claim 1 .

18. An organic electronic device according to claim 17 that is an organic light-emitting device comprising at least one organic light-emitting layer.

19. An organic electronic device according to claim 18 wherein the at least one organic light-emitting layer comprises the polymer.

Assignees

• Pillow Jonathan
• Cambridge Display Tech Ltd
• Sumitomo Chemical Co

Inventors

• Pillow Jonathan

Classifications

• C08G2261/3142

  fluorene-based, e.g. fluorene, indenofluorene, or spirobifluorene · CPC title

• C07C35/52

  Alcohols with a condensed ring system · CPC title

• C08G2261/3162

  Arylamines · CPC title

• H01L51/0039

  Electricity · mapped topic

• H05B33/14

  characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} · CPC title