Electroluminescent device

Patent metadata

Field	Value
Publication number	US-9543522-B2
Application number	US-201113820055-A
Country	US
Kind code	B2
Filing date	Sep 2, 2011
Priority date	Sep 2, 2010
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

An electroluminescent device ( 20 ) having a first layer comprising a fluorinated first organic compound with one or more fluorene residues and soluble in a fluorinated solvent, the first layer being adjacent to a second layer having second organic compound that is insoluble in a fluorinated solvent, and methods and materials for making said device.

First claim

The invention claimed is:

1. A method of forming an organic electronic device comprising a first layer comprising a fluorinated first organic compound having one or more fluorene residues, the first layer adjacent a second layer comprising a fluorine-free second organic compound, the method comprising:
depositing a second solution comprising a second solvent to form the second layer; and
depositing a first solution comprising the fluorinated first organic compound and a first fluorinated solvent on the second layer to form the first layer,
wherein the second organic compound is insoluble in the first fluorinated solvent, wherein the second organic compound is a conductive or semiconductive compound, and wherein the second solvent is an organic solvent.

2. A method according to claim 1 , wherein the first organic compound is a conductive or semiconductive compound.

3. A method according to claim 1 , wherein the first organic compound comprises structure (I):

wherein R 1 and R 2 are the same or different and comprise a hydrogen, a halogen, or a substituent or substituent group including optionally substituted alkyl, alkenyl, alkynyl, or aryl groups, wherein X 1 and X 2 independently comprise a hydrogen, a halogen, or a substituent group including optionally substituted alkyl, alkenyl, alkynyl, or aryl groups, and wherein at least one of X 1 , X 2 , R 1 , and R 2 is fluorine or comprises a substituent group fully or partially substituted with fluorine.

4. A method according to claim 3 , wherein at least one of R 1 and R 2 comprises fluorine.

5. A method according to claim 3 , wherein at least one of R 1 and R 2 comprises a substituent group partially or fully substituted with fluorine.

6. A method according to claim 3 , wherein at least one of X 1 and X 2 comprises fluorine.

7. A method according to claim 3 , wherein at least one of X 1 and X 2 comprises a substituent group partially or fully substituted with fluorine.

8. A method according to claim 1 , wherein the fluorine substituents of the first organic compound make up at least 10 w/w % of the molecular mass of the first organic compound.

9. A method according to claim 1 , wherein the second organic compound comprises structure (II):

wherein R 3 and R 4 are the same or different and comprise a hydrogen or a substituent or substituent group including optionally substituted alkyl, alkenyl, alkynyl, or aryl groups.

10. A method according to claim 1 , wherein the first fluorinated solvent is selected from the group consisting of fluoroalkanes and fluoroaromatics.

11. A method according to claim 1 , wherein the first solvent comprises structure (III):

wherein R 5 to R 8 independently comprise fluorine, hydrogen, or a substituent group including optionally substituted alkyl, alkenyl, alkynyl, or aryl groups, wherein at least one of R 5 to R 8 does not comprise hydrogen.

12. A method according to claim 11 , wherein the substituent groups are substituted with one or more fluorine substituents.

13. A method according to claim 1 , wherein the second solvent is a substantially non-fluorinated solvent.

14. A method according to claim 1 , wherein the first layer comprises an electron transport layer for transporting electrons from a cathode to an emitting layer.

15. A method according to claim 1 , wherein the second layer comprises an emitting layer for emitting electromagnetic radiation.

16. A method according to claim 15 , wherein the electromagnetic radiation is in the range from 300 nm to 800 nm.

17. A method according to claim 2 , wherein the first organic compound is oligomeric or polymeric.

18. A method according to claim 1 , wherein the second organic compound is oligomeric or polymeric.

19. A method according to claim 10 , wherein the fluoroalkanes are selected from the group consisting of fluorooctanes, fluorononanes, fluorodecanes, and fluorocyclohexyl methyl decalines.

20. A method according to claim 10 , wherein the fluoroaromatics are selected from the group consisting of fluorotoluenes and fluoroxylenes.

21. A method according to claim 13 , wherein the second solvent is an aromatic solvent.

22. A method according to claim 21 , wherein the aromatic solvent is selected from the group consisting of toluene, xylene, and mixtures thereof.

23. A method according to claim 1 , wherein the organic electronic device is an electroluminescent device.

Assignees

• Pillow Jonathan
• Cambridge Display Tech Ltd

Inventors

• Pillow Jonathan

Classifications

• 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

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• C08L65/00

  Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers · CPC title

• C09K2211/1416

  Condensed systems · CPC title

• C08G2261/148

  Side-chains having aromatic units · CPC title