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Low‐Energy Electron‐Induced Transformations in Organolead Halide Perovskite
Author(s) -
Milosavljević Aleksandar R.,
Huang Weixin,
Sadhu Subha,
Ptasinska Sylwia
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201605013
Subject(s) - perovskite (structure) , x ray photoelectron spectroscopy , halide , iodide , decomposition , chemistry , electron , scanning electron microscope , chemical engineering , materials science , inorganic chemistry , crystallography , organic chemistry , physics , quantum mechanics , engineering , composite material
Methylammonium lead iodide perovskite (MAPbI 3 ), 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 MAPbI 3 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 MAPbI 3 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 MAPbI 3 . It is proposed that the transformations are triggered by the interactions with the organic part of the material (methylammonium), resulting in the MAPbI 3 decomposition and aggregation of the hydrocarbon layer.