title: Ambipolar charge transport in "traditional" organic hole transport layers.
abstract: Organic semiconductors are often labeled as electron or hole transport materials due to the primary role they perform in devices. However, despite these labels we have shown using time-of-flight that two of the traditional "hole transport materials" TPD and NPB are actually excellent electron transporters the electron transport properties of which are comparable to those for holes.
authors.affiliation: School of Physics and Astronomy, Queen Mary University of London, London, UK.
authors.forename: S
authors.initials: S
authors.lastname: Khademi
authors.forename: J Y
authors.initials: JY
authors.lastname: Song
authors.forename: P B
authors.initials: PB
authors.lastname: Wyatt
authors.forename: T
authors.initials: T
authors.lastname: Kreouzis
authors.forename: W P
authors.initials: WP
authors.lastname: Gillin
mesh_terms: D004579:Electron Transport; D004583:Electrons; D009930:Organic Chemicals / Q000737:chemistry*; D012666:Semiconductors
chemical_list: D009930:Organic Chemicals