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@ARTICLE{Hsu:877822,
      author       = {Hsu, Hung-Chang and Huang, Bo-Chao and Chin, Shu-Cheng and
                      Hsing, Cheng-Rong and Nguyen, Duc-Long and Schnedler,
                      Michael and Sankar, Raman and Dunin-Borkowski, Rafal E. and
                      Wei, Ching-Ming and Chen, Chunguang and Ebert, Philipp and
                      Chiu, Ya-Ping},
      title        = {{P}hotodriven {D}ipole {R}eordering: {K}ey to {C}arrier
                      {S}eparation in {M}etalorganic {H}alide {P}erovskites},
      journal      = {ACS nano},
      volume       = {13},
      number       = {4},
      issn         = {1936-086X},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2020-02461},
      pages        = {4402 - 4409},
      year         = {2019},
      abstract     = {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.},
      cin          = {ER-C-1 / PGI-5},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ER-C-1-20170209 / I:(DE-Juel1)PGI-5-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30916538},
      UT           = {WOS:000466052900065},
      doi          = {10.1021/acsnano.8b09645},
      url          = {https://juser.fz-juelich.de/record/877822},
}