title: Low-Energy Electron-Induced Transformations in Organolead Halide Perovskite.
abstract: Methylammonium lead iodide perovskite (MAPbI3 ), a prototype material for potentially high-efficient and low-cost organic-inorganic hybrid perovskite solar cells, has been investigated intensively in recent years. A study of low-energy electron-induced transformations in MAPbI3 is presented, performed by combining controlled electron-impact irradiation with X-ray photoelectron spectroscopy and scanning electron microscopy. Changes were observed in both the elemental composition and the morphology of irradiated MAPbI3 thin films as a function of the electron fluence for incident energies from 4.5 to 60 eV. The results show that low-energy electrons can affect structural and chemical properties of MAPbI3 . It is proposed that the transformations are triggered by the interactions with the organic part of the material (methylammonium), resulting in the MAPbI3 decomposition and aggregation of the hydrocarbon layer.
authors.affiliation: Radiation Laboratory, University of Notre Dame, Notre Dame, IN, 46556, USA. milosavljevic@synchrotron-soleil.fr.|SOLEIL, l'Orme des Merisiers, St. Aubin, BP48, 91192, Gif sur Yvette Cedex, France. milosavljevic@synchrotron-soleil.fr.|Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080, Belgrade, Serbia. milosavljevic@synchrotron-soleil.fr.
authors.forename: Aleksandar R
authors.identifier: 0000-0003-3541-8872
authors.initials: AR
authors.lastname: Milosavljević
authors.affiliation: Radiation Laboratory, University of Notre Dame, Notre Dame, IN, 46556, USA.|Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA.
authors.forename: Weixin
authors.initials: W
authors.lastname: Huang
authors.affiliation: Radiation Laboratory, University of Notre Dame, Notre Dame, IN, 46556, USA.
authors.forename: Subha
authors.initials: S
authors.lastname: Sadhu
authors.affiliation: Radiation Laboratory, University of Notre Dame, Notre Dame, IN, 46556, USA.|Department of Physics, University of Notre Dame, Notre Dame, IN, 46556, USA.
authors.forename: Sylwia
authors.initials: S
authors.lastname: Ptasinska
keywords: X-ray photoelectron spectroscopy; low-energy electrons; organolead compounds; perovskite; solar cells