Synthesis and Characterization of Oxetane‐Functionalized Phosphorescent Ir(III)‐Complexes

Abstract In order to incorporate iridium(III) complexes covalently into an oxetane‐bearing hole‐transporting matrix, a new oxetane‐equipped acetoacetate derivative was introduced as an ancillary ligand. Model complexes with an analogical nonpolymerizable ligand were also prepared in order to perform comparative investigations. Therefore, a series of bis‐cyclometalated Ir(III) complexes, showing orange (C⁁N‐ligand, coumarin 6) and green (C⁁N‐ligand, phenylpyridine) emission were synthesized and fully characterized. The emission maxima are 569 nm for the orange and 518 nm for the green‐emitting Ir(III) complexes. Entirely solution processed devices, based on crosslinkable hole‐conductors, partially doped with the described orange and green Ir(III) emitters, respectively, were fabricated and tested. magnified image