Electroluminescent device containing an anthracene derivative

1. An OLED device comprising a cathode, an anode, and a light-emitting layer therebetween, additionally comprising a layer between the cathode and the light-emitting layer including a compound comprising one and only one anthracene nucleus and one and only one phenanthroline-containing substituent and wherein said nucleus is substituted in the 2 position with a phenanthroline-containing substituent wherein the compound is represented by Formula (1a) or Formula (1b):

wherein:

d 1 and d 3 -d 10 may be the same or different and each represents hydrogen or an independently selected substituent, provided two substituents may combine to form a fused ring group;

L represents a bond or a divalent linking group;

each W 1 represents CH or N, provided one and only one of W 1 represents N;

each W 2 represents CH or N, provided one and only one of W 2 represents N;

each g 1 may be the same or different and each represents an independently selected substituent;

p, r, and t are independently 0-3;

m and n are independently 0-2; and

s is 0 or 1.

2. The device of claim 1 wherein a phenanthroline-containing substituent is directly bonded to the anthracene nucleus.

3. The device of claim 1 wherein a phenanthroline-containing substituent is bonded to the anthracene nucleus by means of a divalent linking group.

4. The device of claim 1 wherein the anthracene nucleus is substituted with independently selected aromatic groups in the 9- and 10-positions.

5. The device of claim 1 wherein d 9 and d 10 represent independently selected aromatic groups.

6. The device of claim 3 wherein L comprises one or more methylene groups.

7. The device of claim 1 wherein the compound is represented by Formula (1c) or Formula (1d):

wherein:

d 1 and d 3 -d 10 may be the same or different and each represents hydrogen or an independently selected substituent, provided two substituents may combine to form a fused ring group;

each g 1 may be the same or different and each represents an independently selected substituent;

p, r, and t are independently 0-3;

m and n are independently 0-2; and

s is 0 or 1.

8. The device of claim 1 wherein the compound is represented by Formula (1e):

wherein:

d 1 and d 3 -d 10 may be the same or different and each represents hydrogen or an independently selected substituent, provided two substituents may combine to form a fused ring;

each g 1 may be the same or different and each represents an independently selected substituent;

p is 0-3; and

m and n are independently 0-2.

9. An OLED device according to claim 1 provided the compound does not include a substituent comprising Si.