@article{Yalcinkaya2022-10Chemi-58381,
  year={2022},
  doi={10.1002/aenm.202202442},
  title={Chemical Strain Engineering of MAPbI<sub>3</sub> Perovskite Films},
  number={37},
  volume={12},
  issn={1614-6832},
  journal={Advanced Energy Materials},
  author={Yalcinkaya, Yenal and Hermes, Ilka M. and Seewald, Tobias and Amann‐Winkel, Katrin and Veith, Lothar and Schmidt-Mende, Lukas and Weber, Stefan A. L.}
}

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    <dc:contributor>Veith, Lothar</dc:contributor>
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    <dcterms:title>Chemical Strain Engineering of MAPbI&lt;sub&gt;3&lt;/sub&gt; Perovskite Films</dcterms:title>
    <dc:contributor>Amann‐Winkel, Katrin</dc:contributor>
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    <dc:creator>Schmidt-Mende, Lukas</dc:creator>
    <dcterms:abstract xml:lang="eng">This study introduces a new chemical method for controlling the strain in methylammonium lead iodide (MAPbI&lt;sub&gt;3&lt;/sub&gt;) perovskite crystals by varying the ratio of Pb(Ac)&lt;sub&gt;2&lt;/sub&gt; and PbCl&lt;sub&gt;2&lt;/sub&gt; in the precursor solution. To observe the effect on crystal strain, a combination of piezoresponse force microscopy (PFM) and X-ray diffraction (XRD) is used. The PFM images show an increase in the average size of ferroelastic twin domains upon increasing the PbCl&lt;sub&gt;2&lt;/sub&gt; content, indicating an increase in crystal strain. The XRD spectra support this observation with strong crystal twinning features that appear in the spectra. This behavior is caused by a strain gradient during the crystallization due to different evaporation rates of methylammonium acetate and methylammonium chloride as revealed by time-of-flight secondary ion mass spectroscopy and grazing incidince X-ray diffraction measurements. Additional time-resolved photoluminescence shows an increased carrier lifetime in the MAPbI&lt;sub&gt;3&lt;/sub&gt; films prepared with higher PbCl&lt;sub&gt;2&lt;/sub&gt; content, suggesting a decreased trap density in films with larger twin domain structures. The results demonstrate the potential of chemical strain engineering as a simple method for controlling strain-related effects in lead halide perovskites.</dcterms:abstract>
    <dc:creator>Weber, Stefan A. L.</dc:creator>
    <dc:contributor>Hermes, Ilka M.</dc:contributor>
    <dcterms:issued>2022-10</dcterms:issued>
    <dc:contributor>Schmidt-Mende, Lukas</dc:contributor>
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    <dc:contributor>Weber, Stefan A. L.</dc:contributor>
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    <dc:contributor>Yalcinkaya, Yenal</dc:contributor>
    <dc:rights>Attribution-NonCommercial 4.0 International</dc:rights>
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