New iridium cyclometallated complexes with potential application in OLED

The photophysical and electrochemical properties of cyclometallic cationic iridium complexes that also contain bipyridine type ligands have been investigated in this work. The effect on the photophysical properties of the complexes on the presence of aliphatic long chain or branched substitution was analyzed. The complexes show photoluminescence maxima in the green-blue region of the visible spectrum, with acceptable quantum yields and lifetime, showing in this way potentiality to be tested in OLED devices.

Graphical abstractThe photophysical properties of cyclometallated cationic iridium complexes that also contain substituted bipyridine ligands have been investigated in this work. The aliphatic chain on the substituent would avoid ordering in the solid state. The compounds show green-blue photoluminescence, showing in this way potentiality to be tested in OLED devices.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Study of photophysical properties of cyclometallated cationic iridium complexes. ► Aliphatic bulky chain substituents on bipyridine to avoid ordering in solid state. ► Compounds show potentiality to be tested in OLED.