Zusammenfassung
Cyclometalated Ir(III) complexes are excellent triplet emitters used in efficient OLEDs and sensing devices. These materials are also the subject of several spectroscopic and theoretical investigations. The potential for applications of Ir(III) complexes in optical devices is determined by their electronic structures. The unique excited-state properties of Ir(III) complexes make these compounds ...
Zusammenfassung
Cyclometalated Ir(III) complexes are excellent triplet emitters used in efficient OLEDs and sensing devices. These materials are also the subject of several spectroscopic and theoretical investigations. The potential for applications of Ir(III) complexes in optical devices is determined by their electronic structures. The unique excited-state properties of Ir(III) complexes make these compounds particularly suitable for applications in oxygen sensing, e.g., for aerodynamic measurements and biomedical imaging. Therefore, it is important to study the electronic properties of these complexes in detail and to investigate the possibilities of tuning and optimizing the emission behavior, for example, by substitution of known compounds. In particular, the substitution of ppy ligands of Ir(ppy)₃ by ppy-NPh₂ has distinct effects on the photoluminescence behavior, such as energy shifts, changes in the emission decay time, and quantum yields. Moreover, the substitution leads to an effective shielding of the emitting core and - what is very important - makes the compound soluble in organic solvents. Synthesis and electroluminescence properties of Ir(ppy-NPh₂)₃ and related compounds have already been reported.
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