Modified DCM-type materials for red fluorescent organic light-emitting diodes.

: A series of red emitters 1-3 based on modified DCM were synthesized and their electroluminescent properties were investigated. A device employing red emitter 2 as a dopant exhibited efficient red emission with maximum luminous efficiency of 1.87 cd/A, maximum power efficiency of 0.78 lm/W, maximum external quantum efficiency of 1.52%, and CIE coordinates of (0.65, 0.35) at 7.0 V.