Organic electroluminescent devices with high luminance

1. A multilayer electroluminescent device comprising a cathode, an anode, a light emitting layer (LEL) and a layer disposed between the cathode and anode containing a dihydrophenazine compound represented by:

wherein:

R 1 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, or connected to R 2 to form 5 or 6 member rings which may be substituted or unsubstituted;

R 4 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, or connected to R 3 to form 5 or 6 member rings which may be substituted or unsubstituted;

R 5 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl, substituted alkenyl, alkoxy, aryloxy, amino, or connected to R 6 to form 5 or 6 member rings which may be substituted or unsubstituted;

R 8 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, or connected to R 7 to form 5 or 6 member rings which may be substituted or unsubstituted;

R 2 and R 3 are individually hydrogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, halogen, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, thioaryl, thioalkyl, or connected to form 5 or 6 member rings which may be substituted or unsubstituted;

R 6 and R 7 are individually hydrogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, halogen, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, thioaryl, thioalkyl, or connected to form 5 or 6 member rings which may be substituted or unsubstituted; and

R 9 and R 10 are individually alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl;

wherein one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 , is other than hydrogen.

2. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is of the formula:

3. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is of the formula:

4. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is of the formula:

5. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is of the formula:

6. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is of the formula:

7. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is of the formula:

8. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is of the formula:

9. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is of the formula:

10. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is contained in a layer that is adjacent to the anode.

11. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is contained in a layer that is not adjacent to the anode.

12. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine compound is contained in a layer that is not adjacent to the light emitting layer.

13. The multilayer electroluminescent device of claim 1 wherein the dihydrophenazine derivative functions to improve hole-transporting and there is present in a layer between the anode and the light emitting layer a second compound that functions to improve hole transporting.

14. The multilayer electroluminescent device of claim 13 wherein the second compound is represented by:

wherein Q 1 and Q 2 are independently selected aromatic tertiary amine moieties and G is a linking group or a bond.

15. The multilayer electroluminescent device of claim 13 wherein the second compound is contained in the layer adjacent to the light emitting layer.

16. The multilayer electroluminescent device of claim 13 wherein the second compound is N,N′-di(1-naphthyl)-N,N′-diphenyl-4,4′-diaminobiphenyl or N,N′-di-1-naphthalenyl-N,N′-di-2-naphthalenyl-[1,1′-Biphenyl]-4,4′-diamine.

17. A multilayer electroluminescent device comprising a cathode, an anode, a light emitting layer (LEL) and a layer disposed between the cathode and anode containing a dihydrophenazine compound represented by:

wherein:

R 1 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino or connected to R 11 to form 5 or 6 member ring systems;

R 4 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino or connected to R 14 to form 5 or 6 member ring systems;

R 5 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl, substituted alkenyl, alkoxy, aryloxy, amino, or connected to R 6 to form 5 or 6 member ring systems;

R 6 and R 7 are individually hydrogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, halogen, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, thioaryl, thioalkyl, or connected to form 5 or 6 member ring systems;

R 8 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, or connected to R 7 to form 5 or 6 member ring systems;

R 9 and R 10 are individually hydrogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl;

R 11 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl, substituted alkenyl, alkoxy, aryloxy, amino, connected to R 1 to form 5 or 6 member ring systems or connected to R 12 to form 5 or 6 member ring systems;

R 12 and R 13 are individually hydrogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, halogen, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, thioaryl, thioalkyl, or connected to form 5 or 6 member ring systems; and

R 14 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, amino, connected to R 4 to form 5 or 6 member ring systems or connected to R 13 to form 5 or 6 member ring systems.

18. The multilayer electroluminescent device of claim 17 wherein the dihydrophenazine compound is contained in a layer that is adjacent to the anode.

19. The multilayer electroluminescent device of claim 17 wherein the dihydrophenazine compound is contained in a layer that is not adjacent to the anode.

20. The multilayer electroluminescent device of claim 17 wherein the dihydrophenazine compound is contained in a layer that is not adjacent to the light emitting layer.

21. The multilayer electroluminescent device of claim 17 wherein the dihydrophenazine derivative functions to improve hole-transporting and there is present in a layer between the anode and the light emitting layer a second compound that functions to improve hole transporting.

22. The multilayer electroluminescent device of claim 21 wherein the second compound is represented by:

wherein Q 1 and Q 2 are independently selected aromatic tertiary amine moieties and G is a linking group or a bond.

23. The multilayer electroluminescent device of claim 21 wherein the second compound is contained in the layer adjacent to the light emitting layer.

24. The multilayer electroluminescent device of claim 21 wherein the second compound is N,N′-di(1-naphthyl)-N,N′-diphenyl-4,4′-diaminobiphenyl or N,N′-di-1-naphthalenyl-N,N′-di-2-naphthalenyl-[1,1′-Biphenyl]-4,4′-diamine.

25. A multilayer electroluminescent device comprising a cathode, an anode, a light emitting layer (LEL) and a layer disposed between the cathode and anode containing a dihydrophenazine compound represented by:

wherein:

R 1 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, or amino;

R 4 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, or amino;

R 5 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl, substituted alkenyl, alkoxy, aryloxy, or amino;

R 8 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, or amino; and

R 9 and R 10 are individually hydrogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl.

26. The multilayer electroluminescent device of claim 25 wherein the dihydrophenazine compound is contained in a layer that is adjacent to the anode.

27. The multilayer electroluminescent device of claim 25 wherein the dihydrophenazine compound is contained in a layer that is not adjacent to the anode.

28. The multilayer electroluminescent device of claim 25 wherein the dihydrophenazine compound is contained in a layer that is not adjacent to the light emitting layer.

29. The multilayer electroluminescent device of claim 25 wherein the dihydrophenazine derivative functions to improve hole-transporting and there is present in a layer between the anode and the light emitting layer a second compound that functions to improve hole transporting.

30. The multilayer electroluminescent device of claim 29 wherein the second compound is represented by:

wherein Q 1 and Q 2 are independently selected aromatic tertiary amine moieties and G is a linking group or a bond.

31. The multilayer electroluminescent device of claim 29 wherein the second compound is contained in the layer adjacent to the light emitting layer.

32. The multilayer electroluminescent device of claim 29 wherein the second compound is N,N′-di(1-naphthyl)-N,N′-diphenyl-4,4′-diaminobiphenyl or N,N′-di-1-naphthalenyl-N,N′-di-2-naphthalenyl-[1,1′-Biphenyl]-4,4′-diamine.

33. A multilayer electroluminescent device comprising a cathode, an anode, a light emitting layer (LEL) and a layer disposed between the cathode and anode containing a dihydrophenazine compound represented by:

wherein:

R 1 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, or amino;

R 4 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, or amino;

R 5 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl, substituted alkenyl, alkoxy, aryloxy, or amino;

R 8 is hydrogen, halogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl, alkoxy, aryloxy, or amino; and

R 9 and R 10 are individually hydrogen, alkyl of from 1 to 24 carbon atoms, which are branched, unbranched, or cyclic, aryl or substituted aryl of from 5 to 24 carbon atoms, heterocyclic or substituted heterocyclic, alkenyl or substituted alkenyl.

34. The multilayer electroluminescent device of claim 33 wherein the dihydrophenazine compound is contained in a layer that is adjacent to the anode.

35. The multilayer electroluminescent device of claim 33 wherein the dihydrophenazine compound is contained in a layer that is not adjacent to the anode.

36. The multilayer electroluminescent device of claim 33 wherein the dihydrophenazine compound is contained in a layer that is not adjacent to the light emitting layer.

37. The multilayer electroluminescent device of claim 33 wherein the dihydrophenazine derivative functions to improve hole-transporting and there is present in a layer between the anode and the light emitting layer a second compound that functions to improve hole transporting.

38. The multilayer electroluminescent device of claim 37 wherein the second compound is represented by:

wherein Q 1 and Q 2 are independently selected aromatic tertiary amine moieties and G is a linking group or a bond.

39. The multilayer electroluminescent device of claim 37 wherein the second compound is contained in the layer adjacent to the light emitting layer.

40. The multilayer electroluminescent device of claim 37 wherein the second compound is N,N′-di(1-naphthyl)-N,N′-diphenyl-4,4′-diaminobiphenyl or N,N′-di-1-naphthalenyl-N,N′-di-2-naphthalenyl-[1,1′-Biphenyl]-4,4′-diamine.