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@ARTICLE{Li:904105,
      author       = {Li, Guixiang and Su, Zhenhuang and Li, Meng and Yang, Feng
                      and Aldamasy, Mahmoud H. and Pascual, Jorge and Yang,
                      Fengjiu and Liu, Hairui and Zuo, Weiwei and Di Girolamo,
                      Diego and Iqbal, Zafar and Nasti, Giuseppe and Dallmann,
                      André and Gao, Xingyu and Wang, Zhaokui and Saliba, Michael
                      and Abate, Antonio},
      title        = {{I}onic {L}iquid {S}tabilizing {H}igh‐{E}fficiency {T}in
                      {H}alide {P}erovskite {S}olar {C}ells},
      journal      = {Advanced energy materials},
      volume       = {11},
      number       = {32},
      issn         = {1614-6832},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2021-05675},
      pages        = {2101539 -},
      year         = {2021},
      abstract     = {Tin halide perovskites attract incremental attention to
                      deliver lead-free perovskite solar cells. Nevertheless,
                      disordered crystal growth and low defect formation energy,
                      related to Sn(II) oxidation to Sn(IV), limit the efficiency
                      and stability of solar cells. Engineering the processing
                      from perovskite precursor solution preparation to film
                      crystallization is crucial to tackle these issues and enable
                      the full photovoltaic potential of tin halide perovskites.
                      Herein, the ionic liquid n-butylammonium acetate (BAAc) is
                      used to tune the tin coordination with specific O…Sn
                      chelating bonds and NH…X hydrogen bonds. The
                      coordination between BAAc and tin enables modulation of the
                      crystallization of the perovskite in a thin film. The
                      resulting BAAc-containing perovskite films are more compact
                      and have a preferential crystal orientation. Moreover, a
                      lower amount of Sn(IV) and related chemical defects are
                      found for the BAAc-containing perovskites. Tin halide
                      perovskite solar cells processed with BAAc show a power
                      conversion efficiency of over $10\%.$ This value is retained
                      after storing the devices for over 1000 h in nitrogen. This
                      work paves the way toward a more controlled tin-based
                      perovskite crystallization for stable and efficient
                      lead-free perovskite photovoltaics.},
      cin          = {IEK-5},
      ddc          = {050},
      cid          = {I:(DE-Juel1)IEK-5-20101013},
      pnm          = {1213 - Cell Design and Development (POF4-121)},
      pid          = {G:(DE-HGF)POF4-1213},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000669023800001},
      doi          = {10.1002/aenm.202101539},
      url          = {https://juser.fz-juelich.de/record/904105},
}