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@ARTICLE{Merten:615659,
      author       = {Merten, Lena and Eberle, Timo and Kneschaurek, Ekaterina
                      and Scheffczyk, Niels and Zimmermann, Paul and Zaluzhnyy,
                      Ivan and Khadiev, Azat and Bertram, Florian and Paulus,
                      Fabian and Hinderhofer, Alexander and Schreiber, Frank},
      title        = {{H}alide {S}egregated {C}rystallization of {M}ixed-{H}alide
                      {P}erovskites {R}evealed by {I}n {S}itu {GIWAXS}},
      journal      = {ACS applied materials $\&$ interfaces},
      volume       = {16},
      number       = {7},
      issn         = {1944-8244},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PUBDB-2024-06235},
      pages        = {8913-8921},
      year         = {2024},
      note         = {Waiting for fulltext},
      abstract     = {Mixed-halide perovskites of the composition
                      MAPb(BrxI1–x)3, which seem to exhibit a random and uniform
                      distribution of halide ions in the absence of light,
                      segregate into bromide- and iodide-rich phases under
                      illumination. This phenomenon of halide segregation has been
                      widely investigated in the photovoltaics context since it is
                      detrimental for the material properties and ultimately the
                      device performance of these otherwise very attractive
                      materials. A full understanding of the mechanisms and
                      driving forces has remained elusive. In this work, a study
                      of the crystallization pathways and the mixing behavior
                      during deposition of MAPb(BrxI1–x)3 thin films with
                      varying halide ratios is presented. In situ grazing
                      incidence wide-angle scattering (GIWAXS) reveals the
                      distinct crystallization behavior of mixed-halide perovskite
                      compositions during two different fabrication routes:
                      nitrogen gas-quenching and the lead acetate route. The
                      perovskite phase formation of mixed-halide thin films hints
                      toward a segregation tendency since separate crystallization
                      pathways are observed for iodide- and bromide-rich phases
                      within the mixed compositions. Crystallization of the
                      bromide perovskite phase (MAPbBr3) is already observed
                      during spin coating, while the iodide-based fraction of the
                      composition forms solvent complexes as an intermediate
                      phase, only converting into the perovskite phase upon
                      thermal annealing. These parallel crystallization pathways
                      result in mixed-halide perovskites forming from initially
                      halide-segregated phases only under the influence of
                      heating.},
      cin          = {DOOR ; HAS-User / FS-PETRA-D},
      ddc          = {600},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-D-20210408},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3) / 05K19VTA -
                      Entwicklung einer kompakten Probenumgebung mit Spin-Coater
                      für in-situ Röntgenstreuung an PETRA III. (BMBF-05K19VTA)
                      / DFG project G:(GEPRIS)402726906 - SPP 2196:
                      Perowskit-Halbleiter: Von fundamentalen Eigenschaften zur
                      Anwendung (402726906) / FS-Proposal: I-20210276 (I-20210276)
                      / FS-Proposal: I-20220453 (I-20220453) / FS-Proposal:
                      I-20221269 (I-20221269)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3 /
                      G:(DE-Ds200)BMBF-05K19VTA / G:(GEPRIS)402726906 /
                      G:(DE-H253)I-20210276 / G:(DE-H253)I-20220453 /
                      G:(DE-H253)I-20221269},
      experiment   = {EXP:(DE-H253)P-P23-20150101 / EXP:(DE-H253)P-P08-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {38335318},
      UT           = {WOS:001164530900001},
      doi          = {10.1021/acsami.3c18623},
      url          = {https://bib-pubdb1.desy.de/record/615659},
}