Highly efficient red electrophosphorescence from a solution-processed zwitterionic cyclometalated iridium(III) complex

作者：Byun Younghun; Lyu Yi Yeol; Das Rupasree Ragini; Kwon Ohyun; Lee Tae Woo^*; Park Young Ja

来源：Applied Physics Letters, 2007, 91(21): 211106.

DOI：10.1063/1.2809375

A mononuclear red-emitting zwitterionic iridium(III) complex, bis(1-(phenyl)isoquinolinato) iridium(III) (2,2(')-bipyridine-3-ol-3(')-olate), was synthesized and used as a triplet emitter doped in a polymeric host in solution-processed electrophosphorescent light-emitting diodes. We achieved a high luminous effieciency (LE) of 12.62 cd/A with fast response time in the device using the dopant unlike in the device using cationic irridium(III) phosphorescent materials. A hole transporting polymeric interlayer between the anode and the emitting layer improved the LE and decreased the exciton quenching at high electric fields.

• 出版日期2007-11-19