Patent ID: 8877350

Claim:
An organic white light-emitting device, comprising: (a) a substrate; (b) an anode and a cathode spaced from each other; (c) a yellow light-emitting layer comprising a yellow dopant for emitting yellow light; wherein the yellow light-emitting layer further comprises a dinaphthyl anthracene host and an aromatic tertiary amine co-host, and the yellow dopant is a rubrene derivative; (d) first and second blue light-emitting layers, each blue light-emitting layer having at least one different material than the other blue light-emitting layer; and wherein the first blue light-emitting layer is in direct contact with the yellow light-emitting layer and the second blue light-emitting layer is adjacent to the first blue light-emitting layer, wherein the first blue light-emitting layer comprises a dinaphthyl anthracene host, an aromatic tertiary amine co-host up to 12% by volume, and a blue dopant that is a bis(azinyl)azene boron complex compound according to formula K: wherein: A and A′ represent independent azine ring systems corresponding to 6-membered aromatic ring systems containing at least one nitrogen; (X a ) n and (X b ) m represent one or more independently selected substituents and include acyclic substituents or are joined to form a ring fused to A or A′; m and n are independently 0 to 4; Z a and Z b are independently selected substituents; 1, 2, 3, 4, 1′, 2′, 3′, and 4′ are independently selected as either carbon or nitrogen atoms; and provided that X a , X b , Z a , and Z b , 1, 2, 3, 4, 1′, 2′, 3′, and 4′ are selected to provide blue luminescence; and wherein the second blue light-emitting layer comprises a dinaphthyl anthracene host, and a blue dopant that is a styrylbiphenyl derivative having a plurality of diarylamino substituents.