title: Enhanced performance in fluorene-free organometal halide perovskite light-emitting diodes using tunable, low electron affinity oxide electron injectors.
abstract: Fluorene-free perovskite light-emitting diodes (LEDs) with low turn-on voltages, higher luminance and sharp, color-pure electroluminescence are obtained by replacing the F8 electron injector with ZnO, which is directly deposited onto the CH3NH3PbBr3 perovskite using spatial atmospheric atomic layer deposition. The electron injection barrier can also be reduced by decreasing the ZnO electron affinity through Mg incorporation, leading to lower turn-on voltages.
authors.affiliation: Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK.
authors.forename: Robert L Z
authors.initials: RL
authors.lastname: Hoye
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Chua
authors.forename: Kevin P
authors.initials: KP
authors.lastname: Musselman
authors.forename: Guangru
authors.initials: G
authors.lastname: Li
authors.forename: May-Ling
authors.initials: ML
authors.lastname: Lai
authors.forename: Zhi-Kuang
authors.initials: ZK
authors.lastname: Tan
authors.forename: Neil C
authors.initials: NC
authors.lastname: Greenham
authors.forename: Judith L
authors.initials: JL
authors.lastname: MacManus-Driscoll
authors.forename: Richard H
authors.initials: RH
authors.lastname: Friend
authors.forename: Dan
authors.initials: D
authors.lastname: Credgington
keywords: electron injection barrier tuning; perovskite light-emitting diodes; polymer light-emitting diodes; spatial atmospheric atomic layer deposition; zinc magnesium oxide