A promising phosphorescent iridium complex with fluorine substituents: Synthesis, crystal structure, photo- and electro-luminescence performance

In this paper, we report a phosphorescent Ir(III) emitter of Ir(acac-F6)(F-BT)2, where acac-F6 = 1,1,1,5,5,5-hexafluoropentane-2,4-dione and F-BT = 2-(2-fluorophenyl)benzo[d]thiazole, including its crystal structure, electronic nature, photophysical characteristics, thermal and electrochemical properties. Data suggest that Ir(acac-F6)(F-BT)2 is a promising emitter with high quantum yield of 0.19 and good thermal stability, along with its proper energy levels for charge carrier transportation. Electroluminescence (EL) devices using Ir(acac-F6)(F-BT)2 as emitter are also fabricated, and their electroluminescence performances are investigated in detail. The optimal EL device shows a maximum luminance of 27,000 cd/cm2 and a peak current efficiency of 8.7 cd/A.

A phosphorescent Ir(III) complex is synthesized and well characterized. The optimal electroluminescence device based on this complex shows a maximum luminance of 27,000 cd/cm2 and a peak current efficiency of 8.7 cd/A.Figure optionsDownload as PowerPoint slideHighlights
► A high efficiency phosphorescent Ir(III) emitter is synthesized.
► Its structure, nature and properties are well studied and characterized.
► Electroluminescence devices are fabricated.
► A maximum current efficiency of 8.7 cd/A is realized.