title: Solubilised bright blue-emitting iridium complexes for solution processed OLEDs.
abstract: Combining a sterically bulky, electron-deficient 2-(2,4-difluorophenyl)-4-(2,4,6-trimethylphenyl)pyridine (dFMesppy) cyclometalating C∧N ligand with an electron rich, highly rigidified 1,1'-(α,α'-o-xylylene)-2,2'-biimidazole (o-xylbiim) N∧N ligand gives an iridium complex, [Ir(dFMesppy)2(o-xylbiim)](PF6), that achieves extraordinarily bright blue emission (ΦPL= 90%;λmax= 459 nm in MeCN) for a cationic iridium complex. This complex is compared with two reference complexes bearing 4,4'-di-tert-butyl-2,2'-bipyridine, and solution-processed organic light emitting diodes (OLEDs) have been fabricated from these materials.
authors.affiliation: Organic Semiconductor Centre , EaStCHEM School of Chemistry , University of St Andrews , St Andrews , Fife KY16 9ST , UK . Email: eli.zysman-colman@st-andrews.ac.uk ; http://www.zysman-colman.com ; ; Tel: +44 (0)1334 463826.
authors.forename: Adam F
authors.initials: AF
authors.lastname: Henwood
authors.affiliation: Organic Semiconductor Centre , SUPA , School of Physics and Astronomy , University of St Andrews , Fife , KY16 9SS , UK.
authors.forename: Ashu K
authors.initials: AK
authors.lastname: Bansal
authors.affiliation: Organic Semiconductor Centre , EaStCHEM School of Chemistry , University of St Andrews , St Andrews , Fife KY16 9ST , UK . Email: eli.zysman-colman@st-andrews.ac.uk ; http://www.zysman-colman.com ; ; Tel: +44 (0)1334 463826.
authors.forename: David B
authors.initials: DB
authors.lastname: Cordes
authors.affiliation: Organic Semiconductor Centre , EaStCHEM School of Chemistry , University of St Andrews , St Andrews , Fife KY16 9ST , UK . Email: eli.zysman-colman@st-andrews.ac.uk ; http://www.zysman-colman.com ; ; Tel: +44 (0)1334 463826.
authors.forename: Alexandra M Z
authors.initials: AM
authors.lastname: Slawin
authors.affiliation: Organic Semiconductor Centre , SUPA , School of Physics and Astronomy , University of St Andrews , Fife , KY16 9SS , UK.
authors.forename: Ifor D W
authors.initials: ID
authors.lastname: Samuel
authors.affiliation: Organic Semiconductor Centre , EaStCHEM School of Chemistry , University of St Andrews , St Andrews , Fife KY16 9ST , UK . Email: eli.zysman-colman@st-andrews.ac.uk ; http://www.zysman-colman.com ; ; Tel: +44 (0)1334 463826.
authors.forename: Eli
authors.initials: E
authors.lastname: Zysman-Colman