Compressed fluid formulation containing hole transporting material

• US 20040110866A1
• Filed: 12/06/2002
• Published: 06/10/2004
• Est. Priority Date: 12/06/2002
• Status: Active Grant

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Mehta, Rajesh V., Jagannathan, Seshadri, Sadasivan, Sridhar, Jagannathan, Ramesh, Irvin, Glen C., Sprout, Ross A., Vo, Tin T.
• Granted Patent: US 6,896,723 B2
• Time in Patent Office: Days
• US Class Current: 523/160
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H05B 33/14 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 Class Codes: H05B 33/20 characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating
• CPC Class Codes: H10K 85/146 poly N-vinylcarbazol; Derivatives thereof
• CPC Class Codes: H10K 85/30 Coordination compounds
• CPC Class Codes: H10K 85/311 Phthalocyanine
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine

Abstract

An imaging composition comprising a mixture of a solvent and a functional material; wherein the solvent is a compressed fluid and the functional material is a hole transporting material which is dissolved, dispersed and/or solubilized in the compressed fluid; wherein the mixture is thermodynamically stable or thermodynamically metastable or both; wherein the functional material is solvent-free upon deposition on a substrate; and wherein the functional material forms a solid film upon deposition on the substrate.

Claims

1. An imaging composition comprising a mixture of a solvent and a functional material;

wherein the solvent is a compressed fluid and the functional material is a hole transporting material which is dissolved, dispersed and/or solubilized in the compressed fluid;

wherein the mixture is thermodynamically stable or thermodynamically metastable or both;

wherein the functional material is solvent-free upon deposition on a substrate; and

wherein the functional material forms a solid film upon deposition on the substrate.

2. The imaging composition according to claim 1, wherein the composition is capable of forming an image on a non-prepatterned surface.

3. The imaging composition according to claim 1, wherein the composition is capable of forming an image on a pre-patterned surface.

4. The imaging composition according to claim 1, wherein the fluid is a compressed liquid.

5. The imaging composition according to claim 1, wherein the fluid is a supercritical fluid.

6. The imaging composition according to claim 1, wherein the fluid is a mixture of compressed liquid and supercritical fluid.

7. The imaging composition according to claim 1, wherein the fluid is selected from the group consisting of carbon dioxide, nitrous oxide, ammonia, xenon, ethane, ethylene, propane, propylene, butane, isobutane, chlorotrifluoromethane, monofluoromethane, and sulphur hexafluoride.

8. The imaging composition according to claim 1, wherein the fluid is carbon dioxide.

9. The imaging composition according to claim 1, wherein the functional material is a solid, or a combination of a solid and liquid.

10. The imaging composition according to claim 1, wherein the functional material is an organic molecule or an inorganic molecule.

11. The imaging composition according to claim 1, wherein the functional material is selected from the group consisting of a polymer molecule, a metallo-organic molecule, an inorganic molecule, an organic nanoparticle, a polymer nanoparticle, a metallo-organic nanoparticle, an inorganic nanoparticle, an organic microparticles, a polymer micro-particle, a metallo-organic microparticle, an inorganic microparticle, and a composite material.

12. The imaging composition according to claim 1, wherein the functional material is functionalized.

13. The imaging composition of claim 12, wherein functional groups for functionalization include fluorocarbons, siloxane or hydrocarbon groups.

14. The imaging composition according to claim 1, wherein the functional material is particulate.

15. The imaging composition according to claim 14, wherein the mean particle size of the functional material is between 1 nanometer and 1000 nanometers.

16. The imaging composition according to claim 14, wherein the mean particle size of the functional material is between 1 nanometer and 100 nanometers.

17. The imaging composition of claim 1, further comprising a surfactant, a dispersant, or a co-solvent.

18. The imaging composition of claim 1, wherein on delivery to a substrate, the functional material is free of the compressed fluid and co-solvent.

19. The imaging composition of claim 17, wherein the surfactant is non-fluorinated, partially fluorinated, or fully fluorinated.

20. The imaging composition of claim 17, wherein the surfactant is a perfluoropolyether, or a siloxane surfactant.

21. The imaging composition of claim 17, wherein the ratio of surfactant to functional material is from about 0.1:

1 to about 500;

1.

22. The imaging composition of claim 17, wherein the ratio of surfactant to functional material is from about 0.1:

1 to about 100;

1.

23. The imaging composition of claim 17, wherein the ratio of surfactant to functional material is from about 0.1:

1 to about 50;

1.

24. The imaging composition of claim 17, wherein the ratio of co-solvent to functional material is from about 0.01:

1 to about 100;

1.

25. The imaging composition of claim 17, wherein the ratio of co-solvent to functional material is from about 0.01:

1 to about 100;

1.

26. The imaging composition of claim 1, wherein the ratio of compressed fluid to functional material is from about 1:

1×

10<sup>−

5</sup> to about 1;

20.

27. The imaging composition of claim 1, wherein the ratio of compressed fluid to functional material is from about 1:

1×

10<sup>−

3</sup> to about 1;

10.

28. An imaging device comprising a mixture of a solvent and a functional material;

wherein the solvent is a compressed fluid and the functional material is a hole transporting material which is dissolved, dispersed and/or solubilized in the compressed fluid;

wherein the mixture is thermodynamically stable or thermodynamically metastable or both;

wherein the functional material is solvent-free upon deposition on a substrate; and

.

wherein the functional material forms a solid film upon deposition on the substrate.

29. The imaging device according to claim 28 wherein the device is an organic light emitting diode or a polymeric light emitting diode devices.

30. A display device comprising a mixture of a solvent and a functional material;

wherein the solvent is a compressed fluid and the functional material is a hole transporting material which is dissolved, dispersed and/or solubilized in the compressed fluid;

wherein the mixture is thermodynamically stable or thermodynamically metastable or both;

wherein the functional material is solvent-free upon deposition on a substrate; and

wherein the functional material forms a solid film upon deposition on the substrate.

31. The display device of claim 30 selected from the group consisting of television, cell phone, personal digital assistant, appliance, automobile, signage, lighting, computer, communication, and wall.