COMPOSITIONS COMPRISING POLYMERIC BINDERS

• US 20120273736A1
• Filed: 11/24/2010
• Published: 11/01/2012
• Est. Priority Date: 12/23/2009
• Status: Active Grant

• Current Assignee: Merck Patent GmbH (Merck & Co., Inc.)
• Original Assignee: Merck Patent GmbH (Merck & Co., Inc.)
• Inventors: James, Mark, Goncalves-Miskiewicz, Magda, May, Philip Edward, Nanson, Lana, Effenberger, Ruth, Bonrad, Klaus, Pan, Junyou, Kluge, Edgar
• Granted Patent: US 9,178,156 B2
• Time in Patent Office: Days
• US Class Current: 252/519.21
• CPC Class Codes: C08G 59/50 Amines
• CPC Class Codes: C08G 59/56 together with other curing agents
• CPC Class Codes: C08K 5/0041 Optical brightening agents, organic pigments
• CPC Class Codes: C08K 5/0091 Complexes with metal-heteroatom-bonds
• CPC Class Codes: C08K 5/56 Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: C09B 1/00 Dyes with anthracene nucleus not condensed with any other ring
• CPC Class Codes: C09B 57/00 Other synthetic dyes of known constitution
• CPC Class Codes: C09B 57/008 Triarylamine dyes containing no other chromophores
• CPC Class Codes: C09B 57/10 Metal complexes of organic compounds not being dyes in uncomplexed form
• CPC Class Codes: C09D 11/03 characterised by features other than the chemical nature of the binder
• CPC Class Codes: C09D 11/52 Electrically conductive inks
• CPC Class Codes: C09D 5/24 Electrically-conducting paints conductive materials H01B1/00
• CPC Class Codes: C09D 7/63 organic
• 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 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/15 characterised by the solvent used
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 : Manufacturing or production processes characterised by the final manufactured product

Abstract

The present invention relates to novel compositions comprising light emitting materials and/or charge transport materials and a polymeric binder, to their use as conducting inks for the preparation of organic light emitting diode (OLED) devices, to methods for preparing OLED devices using the novel formulations, and to OLED devices prepared from such methods and formulations.

Claims

1-16. -16. (canceled)

17. A composition comprising one or more organic light emitting materials and/or charge transport materials having a molecular weight of at most 5000 g/mol, one or more organic solvents, and one or more polymers, wherein said polymer is an inert binder.

18. The composition according to claim 17, wherein said composition comprises a surface tension in the range of 20 mN/m to 60 mN/m.

19. The composition according to claim 17, wherein said inert binder is a polymer comprising repeating units derived from styrene monomers and/or olefins.

20. The composition according to claim 17, wherein said inert binder is a polymer having a weight average molecular weight of at least 100,000 g/mol.

21. The composition according to claim 17, wherein the composition comprises a viscosity at 25°

C. in the range of 1.5 to 100 meas.

22. The composition according to claim 17, wherein the inert binder is a polymer having a glass transition temperature in the range of −

70 to 160°

C.

23. The composition according to claim 17, wherein said composition comprises in the range of 0.25 to 5% by weight of said inert binders,

24. The composition according to claim 17, wherein said organic solvent is an aromatic compound.

25. The composition according to claim 24, wherein said organic solvent is selected from the group consisting of aromatic ethers, aromatic esters, aromatic ketones, heteroaromatic solvents and aniline derivatives.

26. The composition according to claim 17, wherein said organic solvent comprises a boiling point of at most 260°

C.

27. The composition according to claim 17, wherein said composition comprises at least 80% by weight of said organic solvents.

28. The composition according to claim 17, wherein more organic light emitting materials and/or charge transport materials having a molecular weight of at most 5,000 g/mol is an organic phosphorescent compound which emits light and in addition contains at least one atom having an atomic number greater than 38.

29. The composition according to claim 28, wherein the phosphorescent compound is a compound of formulae (1) to (4):

30. The composition according to claim 29, wherein

DCy is, identically or differently on each occurrence, a cyclic group which contains at least nitrogen, carbon in the form of a carbene or phosphorus, via which the cyclic group is bonded to the metal, and which may in turn carry one or more substituents R¹;

the groups DCy and CCy are connected to one another via a covalent bond; and

A is a diketonate ligand.

31. The composition according to claim 17, wherein the composition comprises 0.5 to 5% by weight organic light emitting materials and/or charge transport materials having a molecular weight of at most 5000 g/mol.

32. A coating or printing ink for the preparation of OLED device which comprises the composition according to claim 17.

33. An OLED device prepared from the composition according to claim 17.