Patent ID: 8420229
Filing Date: 2013-04-16
Classification: H01L

Abstract:
1. An OLED device comprising a cathode, an anode, and having therebetween a light emitting layer, an electron-transporting layer and an electron-injecting layer, (a) the light emitting layer containing a host and up to 50 volume % of a light-emitting fluoranthene compound with a 7,10-diaryl substituted fluoranthene nucleus having no aromatic rings annulated to the fluoranthene nucleus; (b) the electron-injecting layer being located between the cathode and the light-emitting layer and containing an organic lithium compound, and (c) the electron-transporting layer located between the electron-injecting layer and the light-emitting layer and containing a fluoranthene compound with a 7,10-diaryl substituted fluoranthene nucleus having no aromatic rings annulated to the fluoranthene nucleus, wherein each of the fluoranthene compound in the light emitting layer and the electron-transporting layer is according to Formula (III-a) or Formula (III-b): wherein: R R is hydrogen or an optional substituent; and n and m in Formula (III-a) or Formula (III-b) are independently 1-5, and wherein the organic lithium compound is according to Formula (V): wherein: Z and the dashed arc represent two to four atoms and the bonds necessary to complete a 5- to 7-membered ring with the lithium cation; each A represents hydrogen or a substituent and each B represents hydrogen or an independently selected substituent on the Z atoms, provided that two or more substituents may combine to form a fused ring or a fused ring system; j is 0-3 and k is 1 or 2; and m and n in Formula (V) are independently selected integers selected to provide a neutral charge on the complex.