Highly efficient thienylquinoline-based phosphorescent iridium(III) complexes for red and white organic light-emitting diodes

Excellent 2-(thiophen-2-yl)quinoline-based red phosphorescent iridium(III) complexes with triazolpyridine or picolinic acid as ancillary ligands have been designed and prepared. Compared to pentane-2,4-dione analogues, these red phosphors not only effectively broaden full width at half maximum (up to 83 nm) but also greatly increase phosphorescent quantum efficiency (up to 0.76) simultaneously, which have been used for fabricating highly efficient red and white OLEDs.172