This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1021/acsnano.8b09645 in citations.
Please use the identifier: http://hdl.handle.net/2128/25726 in citations.
Photodriven Dipole Reordering: Key to Carrier Separation in Metalorganic Halide Perovskites
Photodriven Dipole Reordering: Key to Carrier Separation in Metalorganic Halide Perovskites
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...
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Personal Name(s): | Hsu, Hung-Chang |
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Huang, Bo-Chao / Chin, Shu-Cheng / Hsing, Cheng-Rong / Nguyen, Duc-Long / Schnedler, Michael / Sankar, Raman / Dunin-Borkowski, Rafal E. / Wei, Ching-Ming / Chen, Chunguang / Ebert, Philipp / Chiu, Ya-Ping (Corresponding author) | |
Contributing Institute: |
Mikrostrukturforschung; PGI-5 Physik Nanoskaliger Systeme; ER-C-1 |
Published in: | ACS nano, 13 (2019) 4, S. 4402 - 4409 |
Imprint: |
Washington, DC
Soc.
2019
|
DOI: |
10.1021/acsnano.8b09645 |
PubMed ID: |
30916538 |
Document Type: |
Journal Article |
Research Program: |
Controlling Configuration-Based Phenomena |
Link: |
Get full text Published on 2019-03-27. Available in OpenAccess from 2020-03-27. Get full text Published on 2019-03-27. Available in OpenAccess from 2020-03-27. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/25726 in citations.
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. |