Low‐Energy Electron‐Induced Transformations in Organolead Halide Perovskite |
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| Authors: | Prof. Dr. Aleksandar R. Milosavljević Weixin Huang Dr. Subha Sadhu Prof. Dr. Sylwia Ptasinska |
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| Affiliation: | 1. Radiation Laboratory, University of Notre Dame, Notre Dame, IN, USA;2. SOLEIL, l'Orme des Merisiers, Gif sur Yvette Cedex, France;3. Institute of Physics Belgrade, University of Belgrade, Belgrade, Serbia;4. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA;5. Department of Physics, University of Notre Dame, Notre Dame, IN, USA |
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| 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. |
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| Keywords: | low-energy electrons organolead compounds perovskite solar cells X-ray photoelectron spectroscopy |
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