The synthesis new dendrimer and high quantum efficiency iridium complex properties of solution processable phosphorescent

Abstract

We demonstrate that the Ir complexes used as dopants in organic electrophosphorescent diodes exhibit high PL quantum efficiency (eta(PL)) in the solid-state. We have pursued the development of highly luminescent solution-processible electrophosphorescent dendrimers. We observed that the PLQY of the (GI-bt(3)Ir) compound dendrimer was approximately 1.5 times higher than the pristine complex Ir(bt)(3) in solution. The external quantum efficiency of OLEDs using the film containing a mixture of the first-generation dendrimer and an electron-transporting material was as high as 4.14%.