Organic element for electroluminescent devices

1. An electroluminescent device comprising a cathode, an anode, and therebetween a layer containing a host material and a second material comprising a bis(aryloxy)azine borohalide complex, wherein the second material comprises between 0.5 and 20% by weight of the layer.

2. The device of claim 1 , wherein said layer is a light-emitting layer.

3. The device of claim 2 , wherein the light emitting layer emits blue or blue-green light.

4. The device of claim 1 , wherein the borohalide complex is present in an amount sufficient to improve the stability of the device.

5. The device of claim 2 , wherein the light-emitting layer includes a third material which emits light.

6. The device of claim 1 wherein the second material comprises between 0.5 and 8% by weight of the layer.

7. The complex of claim 1 , wherein the second material comprises at least six rings.

8. The device of claim 1 , wherein the complex comprises a bis(aryloxy)azine borofluoro complex.

9. The device of claim 1 , wherein the complex comprises a pyridine group.

10. The device of claim 1 , wherein the complex comprises a pyridine group and a fluoro substituent.

11. The device of claim 1 , wherein the complex is represented by Formula (1),

wherein:

Ar 1 and Ar 2 independently represent the atoms necessary to complete an aromatic ring group;

Ar 3 represents the atoms necessary to complete a six-membered aromatic ring group, provided that Ar 3 and Ar 1 as well as Ar 3 and Ar 2 may join together to form additional rings; and

X represents a halide.

12. The device of claim 11 wherein X represents fluoro.

13. The device of claim 11 , wherein Ar 1 and Ar 2 independently represent the atoms necessary to complete six-membered aromatic ring groups.

14. The device of claim 11 , wherein Ar 3 represents the atoms necessary to complete a pyridine ring group.

15. The device of claim 1 , wherein the boron complex is represented by Formula (2),

wherein:

each of V 1 –V 11 represents hydrogen or an independently selected substituent, provided that substituents may combine to form rings; and

X represents a halide.

16. The device of claim 15 wherein X represents fluoro.

17. The device of claim 15 wherein at least two of V 1 –V 11 represent aromatic rings or combine together to form at least two fused aromatic rings.

18. The device of claim 1 wherein the host material is represented by Formula (3),

wherein:

each of W 1 –W 10 represent hydrogen or an independently selected substituent, provided that two substituents can combine to form rings.

19. The device of claim 18 wherein W 9 and W 10 independently represent naphthyl groups.

20. The device of claim 18 wherein W 9 represents a biphenyl group.

21. The device of claim 18 wherein W 9 and W 10 represent a naphthyl group and a biphenyl group, respectively.

22. The device of claim 5 wherein the third material comprises perylene or a derivative of perylene.

23. The device of claim 5 wherein the third material comprises 2,5,8,11-tetra-t-butyl perylene.

24. The device of claim 5 wherein the third material comprises a material of Formula 4a or Formula 4b,

wherein:

each R 1 –R 8 independently represents one or more of hydrogen or an independently selected substituent.

25. The device of claim 5 wherein the third material comprises a material represented by formula 5a,

wherein:

Ar 4 and Ar 5 independently represent the atoms necessary to complete an aromatic ring group; and

X a and X b represent independently selected substituents.

26. The device of claim 5 wherein the third material comprises a compound represented by Formula 5b,

wherein:

each Z a and Z b independently an independently selected substituent;

na independently represents 0, 1, or 2;

nb independently represents 0–4.

27. The device of claim 5 wherein the third material is present in an amount between 0.5 and 20% by weight of the light-emitting layer.

28. The device of claim 5 wherein the third material is present in an amount between 0.5 and 8% by weight of the light-emitting layer.

29. A display comprising the electroluminescent device of claim 1 .

30. The device of claim 1 wherein white light is produced either directly or by using filters.

31. An area lighting device comprising the electroluminescent device of claim 1 .

32. A process for emitting light comprising applying a potential across the device of claim 1 .