Patent ID: 7329466

Claim:
An OLED device comprising a light-emitting layer containing a light emitting bis(azinyl)methene boron complex compound represented by Formula (1): wherein A and A′ represent independent azine ring group systems corresponding to 6-membered aromatic ring systems containing at least one nitrogen; each X a and X b is an independently selected substituent, two of which may join to form a fused ring to A or A′ which may include further fused ring substitution; m and n are independently 0 to 4; Y is H or a substituent: Z a and Z b are independently selected substituents; wherein either (1) at least one of X a and X b is selected from the group consisting of fluoro and alkyl, alkoxy, sulfamoyl, amido , amino, and aryloxy groups or (2) Y is selected from the group consisting of cyano, trifluoromethyl, fluoro, alkylsulfonyl, nitro, and sulfonamido groups or (3) both (1) and (2) are satisfied; provided that 1, 2, 3, 4, 1′, 2′, 3′, and 4′ are independently selected as either carbon or nitrogen atoms; and provided that the selection of each X a and X b , including further substitution, results in a fused ring system of at least 5 fused rings; and provided further that there is at least one substituent on the fused ring system sufficient to provide a wavelength of maximum emission of less than 520 nm at a concentration of <10 −3 M in EtOAc.