Synthesis and optoelectronic properties of dinuclear iridium (III) complexes containing deep blue fluorescence chromophore in the single-emissive-layer WPLEDs

A novel dinuclear iridium (III) complex of DPy(TPA)-C6DBCzC6-DF2Ir(pic) containing deep blue-emitting fluorophore unit DPy(TPA) was successfully synthesized and characterized. Using this dinuclear iridium (III) complex as a single-component emitter and a blend of PVK-PBD as a host matrix, under different applied voltages from 8 to 13 V, stable white emission with the CIE coordinates (0.297 ± 0.009, 0.345 ± 0.007) and a maximum brightness of 961 cd/m2 was achieved in the single-emissive-layer PLEDs at the doping concentrations of 8 wt%.