title: Local Versus Long-Range Diffusion Effects of Photoexcited States on Radiative Recombination in Organic-Inorganic Lead Halide Perovskites.
abstract: Radiative recombination in thin films of the archetypical, high-performing perovskites CH3NH3PbBr3and CH3NH3PbI3shows localized regions of increased emission with dimensions ≈500 nm. Maps of the spectral emission line shape show narrower emission lines in high emission regions, which can be attributed to increased order. Excited states do not diffuse out of high emission regions before they decay, but are decoupled from nearby regions, either by slow diffusion rates or energetic barriers.
authors.affiliation: Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK.
authors.forename: Milan
authors.initials: M
authors.lastname: Vrućinić
authors.affiliation: Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK.
authors.forename: Clemens
authors.initials: C
authors.lastname: Matthiesen
authors.affiliation: Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK.
authors.forename: Aditya
authors.initials: A
authors.lastname: Sadhanala
authors.affiliation: Department of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UK.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Divitini
authors.affiliation: Department of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UK.
authors.forename: Stefania
authors.initials: S
authors.lastname: Cacovich
authors.affiliation: Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK.
authors.forename: Sian E
authors.initials: SE
authors.lastname: Dutton
authors.affiliation: Department of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UK.
authors.forename: Caterina
authors.initials: C
authors.lastname: Ducati
authors.affiliation: Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK.
authors.forename: Mete
authors.initials: M
authors.lastname: Atatüre
authors.affiliation: Department of Physics Clarendon Laboratory University of Oxford Parks Road Oxford OX1 3PU UK.
authors.forename: Henry
authors.initials: H
authors.lastname: Snaith
authors.affiliation: Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK.
authors.forename: Richard H
authors.initials: RH
authors.lastname: Friend
authors.affiliation: Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK.
authors.forename: Henning
authors.initials: H
authors.lastname: Sirringhaus
authors.affiliation: Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK.
authors.forename: Felix
authors.initials: F
authors.lastname: Deschler
keywords: excited state diffusion; hybrid lead halide perovskite; photoluminescence; scanning near‐field microscopy