Electroluminescent device with anthracene derivative host

1. An electroluminescent device comprising a light emitting layer including as a host an anthracene material bearing at least one aryl ring in the 2-position and having a hydrogen or an alkyl group in the 6-position and having up to 12 aromatic carbocyclic rings including at least one naphthalene group in the 9-position of the anthracene group and an aryl group in the 10-position, the anthracene material including among the rings only carbocyclic rings, and including a light emitting material in an amount of up to 15 vol. % of the host.

2. The device of claim 1 wherein the anthracene material comprises independently selected naphthyl groups in the 9- and 10-positions.

3. The device of claim 2 , wherein the naphthyl groups are independently selected 2-naphthyl groups.

4. The device of claim 2 , wherein the naphthyl groups in the 9- and 10-positions are the same groups.

5. The device of claim 1 , wherein the anthracene material is represented by Formula (1),

wherein:

Ar 2 represents an aryl group;

Ar 9 represents a naphthyl group;

Ar 10 represents an aryl group,

v 1 , v 3 , v 4 , v 5 , v 7 , and v 8 independently represent hydrogen or a substituent;

v 6 represents hydrogen or an alkyl group.

6. The device of claim 5 , wherein Ar 9 and Ar 10 represent independently selected naphthyl groups.

7. The device of claim 5 , wherein Ar 10 represents a biphenyl group.

8. The device of claim 5 , wherein v 6 represents a hydrogen.

9. The device of claim 5 , wherein Ar 2 represents a naphthyl or biphenyl group.

10. The device of claim 5 , wherein Ar 2 represents a monocyclic phenyl group.

11. The device of claim 1 , further comprising a second light-emitting layer to provide a white light emission.

12. The device of claim 11 , wherein the second light-emitting layer comprises rubrene or a derivative of rubrene.

13. The device of claim 1 wherein the anthracene material comprises 10 aromatic carbocyclic rings including among the rings only carbocyclic rings.

14. The device of claim 1 wherein the anthracene material comprises at least one 2-naphthyl group.

15. The device of claim 1 wherein the anthracene material comprises a biphenyl group in the 10-position.

16. The device of claim 1 , wherein the 6-position of the anthracene material bears a hydrogen.

17. The device of claim 1 , wherein the aryl group in the 2-position is a monocyclic phenyl group, a naphthyl group or a biphenyl group.

18. The device of claim 1 , wherein the anthracene material comprises only one anthracene moiety.

19. The device of claim 1 , wherein the anthracene material comprises two anthracene moieties.

20. The device of claim 1 , wherein the light-emitting layer includes a blue or blue-green light-emitting material.

21. The device of claim 1 , wherein the light-emitting layer includes a green-light emitting material.

22. The device of claim 1 , wherein the light-emitting layer includes a red-light emitting material.

23. The device of claim 1 , wherein the light-emitting layer includes perylene or a derivative of perylene.

24. The device of claim 1 , wherein the light-emitting layer includes a material of Formula (2a) or (2b),

wherein:

R a -R b represent hydrogen or an independently selected substituent.

25. The device of claim 1 wherein the light-emitting layer includes a compound represented by Formula (3a),

wherein:

w represents N or C—Y, wherein Y represents hydrogen or a substituent;

Ar a and Ar b independently represent the atoms necessary to form an aromatic ring group;

Z a and Z b represent independently selected substituents.

26. The device of claim 1 wherein the anthracene material is selected from the following.

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

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