title: A dibenzofuran-based host material for blue electrophosphorescence.
abstract: Dibenzofuran (DBF) is converted to a vacuum-sublimable, electron-transporting host material via 2,8-substitution with diphenylphosphine oxide moieties. Close pi-pi stacking and the inductive influence of P=O moieties impart favorable electron-transport properties without lowering the triplet energy. A maximum external quantum efficiency of 10.1% and luminance power efficiency of 25.9 lm/W are realized using this material as the host for the blue-green electrophosphorescent molecule, iridium(III) bis(4,6-(di-fluorophenyl)pyridinato-N,C(2')picolinate (FIrpic).
authors.affiliation: Material Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
authors.forename: Paul A
authors.initials: PA
authors.lastname: Vecchi
authors.forename: Asanga B
authors.initials: AB
authors.lastname: Padmaperuma
authors.forename: Hong
authors.initials: H
authors.lastname: Qiao
authors.forename: Linda S
authors.initials: LS
authors.lastname: Sapochak
authors.forename: Paul E
authors.initials: PE
authors.lastname: Burrows