Hauptseite > Publikationsdatenbank > Photodriven Dipole Reordering: Key to Carrier Separation in Metalorganic Halide Perovskites > print

001     877822
005     20240610121212.0
024 7 _ |a 10.1021/acsnano.8b09645
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082 _ _ |a 540
100 1 _ |a Hsu, Hung-Chang
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245 _ _ |a Photodriven Dipole Reordering: Key to Carrier Separation in Metalorganic Halide Perovskites
260 _ _ |a Washington, DC
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520 _ _ |a Photodriven dipole reordering of the intercalated organic molecules in halide perovskites has been suggested to be a critical degree of freedom, potentially affecting physical properties, device performance, and stability of hybrid perovskite-based optoelectronic devices. However, thus far a direct atomically resolved dipole mapping under device operation condition, that is, illumination, is lacking. Here, we map simultaneously the molecule dipole orientation pattern and the electrostatic potential with atomic resolution using photoexcited cross-sectional scanning tunneling microscopy and spectroscopy. Our experimental observations demonstrate that a photodriven molecule dipole reordering, initiated by a photoexcited separation of electron–hole pairs in spatially displaced orbitals, leads to a fundamental reshaping of the potential landscape in halide perovskites, creating separate one-dimensional transport channels for holes and electrons. We anticipate that analogous light-induced polarization order transitions occur in bulk and are at the origin of the extraordinary efficiencies of organometal halide perovskite-based solar cells as well as could reconcile apparently contradictory materials’ properties.
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700 1 _ |a Huang, Bo-Chao
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700 1 _ |a Chin, Shu-Cheng
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700 1 _ |a Hsing, Cheng-Rong
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700 1 _ |a Nguyen, Duc-Long
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700 1 _ |a Schnedler, Michael
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700 1 _ |a Sankar, Raman
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700 1 _ |a Dunin-Borkowski, Rafal E.
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700 1 _ |a Wei, Ching-Ming
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700 1 _ |a Chen, Chunguang
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700 1 _ |a Ebert, Philipp
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700 1 _ |a Chiu, Ya-Ping
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773 _ _ |a 10.1021/acsnano.8b09645
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856 4 _ |u https://juser.fz-juelich.de/record/877822/files/acsnano.8b09645.pdf
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856 4 _ |y Published on 2019-03-27. Available in OpenAccess from 2020-03-27.
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