Patent ID: 7553558

Claim:
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.