A thermally stable greenish blue organic electroluminescent device using a novel emitting amorphous molecular material

摘要

A novel emitting amorphous molecular material with a high glass-transition temperature of 158 deg C, 2,5-bis{4-(bis-(9,9-dimethyl-2-fluorenyl)amino)phenyl}thiophene (BFA-1T), has been developed. BFA-1T emits greenish blue light with a relatively high fluorescence quantum yield of 0.48 in solution. A multilayer organic electroluminescent device using BFA-1T emitted greenish blue light with a maximum luminance of 12350 cd m~(-2) at 11 V with a luminous efficiency of 1.1 lm W~(-1) at a luminance of 300 cd m~(-2). The device worked even at 170 deg C.