Simple pyridine hydrochlorides as bifunctional electron injection and transport materials for high-performance all-solution-processed organic light emitting diodes

Abstract

Simple hydrochloric acid treatment of the corresponding pyridine precursors enable the resulting pyridine hydrochlorides to act as the solution-processed bifunctional electron injection/electron transporting materials. The all-solution-processed super yellow-based fluorescent OLEDs revealed excellent performance with an external quantum efficiency of up to 6.6% and extremely low efficiency roll-off over a wide range of luminance.