N-(4-tert-Butylphenyl)-N-phenyl-4-(9,10-diphenylanthracen-3-yl)benzenamine for blue organic light-emitting diodes

Abstract

In this study, we have synthesized two blue fluorescent materials based on anthracene derivatives with electron-donating diphenylamine moieties by Suzuki cross-coupling reactions. To explore their electroluminescent properties as blue emitting materials, multilayer devices were fabricated in following sequence: indium-tin-oxide (180 nm)/4,4'-bis(N-(1-naphthyl)-N-phenylamino)biphenyl (50 nm)/blue emitters (30 nm)/bathophenanthroline (30 nm)/lithium quinolate (2 nm)/Al (100 nm). Among them, a device using N-(4-tert-butylphenyl)-N-phenyl-4-(9,10-diphenylanthracen-3yl)benzenamine exhibited efficient blue emission with a luminous, power and external quantum efficiency of 3.11 cd/A, 2.39 lm/W, and 1.82% at 20mA/cm(2), respectively. The Commission International de L'Eclairage coordinates of this device were (x, y) = (0.14, 0.15) at 6.0 V. (C) 2016 The Japan Society of Applied Physics