PRINTABLE LIGHT-EMITTING COMPOSITIONS

US 20110193075A1
Filed: 10/13/2009
Published: 08/11/2011
Est. Priority Date: 10/13/2008
Status: Active Grant

First Claim

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1. A composition comprising:

an electron transport compound;

an emissive compound; and

an organic solvent;

wherein the emissive compound is represented by formula (I);

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Abstract

Disclosed herein are compositions comprising an electron transport compound, an emissive compound, and an organic solvent. The emissive compound comprises an organic indium complex attached to a nanoparticle core. These compositions are useful in fabricating light emitting devices and can be deposited on a substrate via a printing process.

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45 Claims

1. A composition comprising:
- an electron transport compound;
  
  an emissive compound; and
  
  an organic solvent;
  
  wherein the emissive compound is represented by formula (I);
- View Dependent Claims (5, 7, 8, 9, 11, 44)
- - 5. The composition of claim 1, wherein the core comprises a moiety selected from the group consisting of a silsesquioxane, a cyclophosphazene, a triazine, a cyclodextrin, a calizarene, a phthalocyanine, and a silica particle.
  - 7. The composition of claim 1, wherein the first optionally substituted bidentate ligand is selected from:
  - 8. The composition of claim 1, wherein the first optionally substituted bidentate ligand is a substituted derivative selected from:
  - 9. The composition of claim 1, wherein the first optionally substituted bidentate ligand is selected from:
  - 11. The composition of claim 1, wherein the compound of formula (I) is selected from:
  - 44. A method of fabricating a light-emitting device comprising depositing a composition according to claim 1 upon an electrically conductive substrate via an inkjet printer.

2. (canceled)

3. (canceled)
- View Dependent Claims (6)
- - 6. The composition of claim 3, wherein the silsesquioxane comprises a 1,3,5,7,9,11,13,15-octakis(dimethylsilyloxy)pentacyclo-[9.5.1.13,9.15,15.17,13]-octasiloxane.

4. (canceled)

10. (canceled)

12. A composition comprising:
- an electron transport compound;
  
  an emissive compound; and
  
  an organic solvent,wherein the emissive compound is represented by one of the following formulas;
- View Dependent Claims (13, 14, 16, 18, 19, 20, 21, 24, 28)
- - 13. The composition of claim 12, wherein
  - 14. The composition of claim 12, wherein
  - 16. The composition of claim 12, wherein the molecular weight of the organic solvent is from about 85 to about 150 g/mol.
  - 18. The composition of claim 12, wherein the organic solvent is selected from:
    - ethylene dichloride, chlorobenzene, dichlorobenzene, and a combination thereof.
  - 19. The composition of claim 12, wherein the organic solvent comprises 4-methyl-2-pentanone.
  - 20. The composition of claim 12, wherein the organic solvent comprises a combination of two compounds selected from:
    - benzene, toluene, 1,2-dichloroethane, chlorobenzene, dichlorobenzene, and a C_1-10ketone.
  - 21. The composition of claim 12, wherein the emissive compound is present at a concentration of from about 0.0001 wt % to about 10 wt %.
  - 24. The composition of claim 12, wherein the electron transport compound is present at a concentration of from about 0.1 wt % to about 10 wt %.
  - 28. The composition of claim 12, wherein the composition has a viscosity of from about 1 cP to about 20 cP at 20°
    - C.

15. (canceled)

17. (canceled)

22. (canceled)

23. (canceled)

25. (canceled)

26. (canceled)

27. (canceled)

29. (canceled)

30. A composition comprising:
- an emissive compound represented by Formula (IV);
- View Dependent Claims (31, 32, 33, 35, 45)
- - 31. The composition of claim 30, wherein the composition has a viscosity of from about 1 cP to about 20 cP at about 20°
    - C.
  - 32. The composition of claim 30, wherein the organic solvent is dichlorobenzene.
  - 33. The composition of claim 30 further comprising a hole transport compound.
  - 35. The composition of claim 33, wherein the composition comprises:
    - from about 0.0001 wt % to about 2 wt % of the emissive compound;
      
      from about 0.1 wt % to about 5 wt % of the hole transport compound;
      
      from about 0.1 wt % to about 5 wt % of the electron transport compound; and
      
      wherein the organic solvent is dichlorobenzene.
  - 45. The composition of claim 30, wherein the hole transport compound is poly(vinylcarbazole).

34. (canceled)

36. A composition comprisingan emissive compound represented by Formula (V):
- View Dependent Claims (37, 38, 39, 41, 42, 43)
- - 37. The composition of claim 36, wherein the composition has a viscosity of from about 1 cP to about 20 cP at about 20°
    - C.
  - 38. The composition of claim 36, wherein the organic solvent is selected from dichlorobenzene and 4-methyl-2-pentanone.
  - 39. The composition of claim 36, wherein the composition comprises:
    - from about 0.0001 wt % to about 5 wt % of the emissive compound;
      
      from about 0.1 wt % to about 5 wt % of the electron transport compound; and
      
      4-methyl-2-pentanone.
  - 41. The composition of claim 39, further comprising poly(vinylcarbazole).
  - 42. The composition of claim 36, wherein the organic solvent is dichlorobenzene.
  - 43. The composition of claim 41, wherein the composition comprises:
    - from about 0.0001 wt % to about 2 wt % of the emissive compound;
      
      from about 0.1 wt % to about 5 wt % of a hole transport compound;
      
      from about 0.1 wt % to about 5 wt % of the electron transport compound; and
      
      wherein the organic solvent is dichlorobenzene.

40. (canceled)

Specification

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Current Assignee
Nitto Denko Corporation
Original Assignee
Nitto Denko Corporation
Inventors
Kondo, Takashl, Mochizuki, Amane, Chae, Hyunsik, Li, Sheng, Froehlich, Jesse Dan

Granted Patent

US 8,721,922 B2
Time in Patent Office

Days
Field of Search
US Class Current

257/40
CPC Class Codes

C09K 11/06   containing organic luminesc...

C09K 2211/185   of the platinum group, i.e....

H05B 33/14   characterised by the chemic...

H10K 2101/10   Triplet emission

H10K 50/11   characterised by the electr...

H10K 85/342   comprising iridium

H10K 85/40   Organosilicon compounds, e....

PRINTABLE LIGHT-EMITTING COMPOSITIONS

First Claim

1 Assignment

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Abstract

31 Citations

45 Claims

Specification

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PRINTABLE LIGHT-EMITTING COMPOSITIONS

First Claim

1 Assignment

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0 Petitions

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Accused Products

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Abstract

31 Citations

45 Claims

Specification

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Solutions

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