Triphenylamine-Based Copolymers and 1, 8-Naphthalimide-Based Molecules for Non-doping Red OLEDs

摘要

Novel linear and tri-branched copolymers with triphenylamine and cyano groups in main chain were synthesized by a concise route without metal-catalysis. They show strong fluorescence in solid state and can be used as non-doping emitter to fabricate emitting diodes. The single-layer OLEDs with PVK or PEDOT buffer layer have been made with these copolymers as the non-doping red-orange emitter (614 nm). Novel naphthalimide derivatives substituted by Schiff base moiety at the 4-position were prepared and the concentration quenching effect of fluorescence is avoided. These dyes emit brilliant red fluorescence in the solid film and were used as non-doping emissive materials to fabricate OLEDs.