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Chemical nature of ferroelastic twin domains in CH3NH3PbI3 perovskite.
Liu, Yongtao; Collins, Liam; Proksch, Roger; Kim, Songkil; Watson, Brianna R; Doughty, Benjamin; Calhoun, Tessa R; Ahmadi, Mahshid; Ievlev, Anton V; Jesse, Stephen; Retterer, Scott T; Belianinov, Alex; Xiao, Kai; Huang, Jingsong; Sumpter, Bobby G; Kalinin, Sergei V; Hu, Bin; Ovchinnikova, Olga S.
Afiliação
  • Liu Y; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Collins L; Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, USA.
  • Proksch R; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Kim S; Asylum Research an Oxford Instruments Company, Santa Barbara, CA, USA.
  • Watson BR; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Doughty B; School of Mechanical Engineering, Pusan National University, Busan, South Korea.
  • Calhoun TR; Department of Chemistry, University of Tennessee, Knoxville, TN, USA.
  • Ahmadi M; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Ievlev AV; Department of Chemistry, University of Tennessee, Knoxville, TN, USA.
  • Jesse S; Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, USA.
  • Retterer ST; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Belianinov A; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Xiao K; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Huang J; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Sumpter BG; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Kalinin SV; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Hu B; Computational Sciences & Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Ovchinnikova OS; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
Nat Mater ; 17(11): 1013-1019, 2018 11.
Article em En | MEDLINE | ID: mdl-30150621
The extraordinary optoelectronic performance of hybrid organic-inorganic perovskites has resulted in extensive efforts to unravel their properties. Recently, observations of ferroic twin domains in methylammonium lead triiodide drew significant attention as a possible explanation for the current-voltage hysteretic behaviour in these materials. However, the properties of the twin domains, their local chemistry and the chemical impact on optoelectronic performance remain unclear. Here, using multimodal chemical and functional imaging methods, we unveil the mechanical origin of the twin domain contrast observed with piezoresponse force microscopy in methylammonium lead triiodide. By combining experimental results with first principles simulations we reveal an inherent coupling between ferroelastic twin domains and chemical segregation. These results reveal an interplay of ferroic properties and chemical segregation on the optoelectronic performance of hybrid organic-inorganic perovskites, and offer an exploratory path to improving functional devices.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nat Mater Assunto da revista: CIENCIA / QUIMICA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nat Mater Assunto da revista: CIENCIA / QUIMICA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Estados Unidos