Complex fluorene-containing compounds for use in OLED devices

摘要

An organic compound comprising a complex fluorene structure represented by the following Formula: wherein: X₁, X₂, X₃, and X₄ include carbon atoms and at least one nitrogen atom; R₁, R₂, R₃, and R₄ are substituents each being individually hydrogen, or amino, or alkyl, or alkenyl, or alkynyl, or alkoxy of from 1 to 40 carbon atoms; aryl or substituted aryl of from 6 to 60 carbon atoms; or heteroaryl or substituted heteroaryl of from 4 to 60 carbons; or F, Cl, or Br; or a cyano group; or a nitro group; or R₃, or R₄ or both are groups that form fused aromatic or heteroaromatic rings; or R₁ and R₂ together form a cyclic ring having 3 to 20 carbon, nitrogen, sulfur or oxygen atoms; or R₁ and R₂ together form a double bond moiety.