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Issue 4, 2017
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Ferroelectric domains in methylammonium lead iodide perovskite thin-films

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Abstract

We explore the ferroic properties of methylammonium lead iodide perovskite solar cells by piezoresponse force microscopy (PFM). In vertical and horizontal PFM imaging, we find domains of alternating polarization with a width of 90 nm which we identify as polarized ferroelectric domains. High-resolution photo-conductive atomic force micrographs under illumination also show alternating charge carrier extraction patterns which we attribute to the local vertical polarization components within the ferroelectric domains. The correlation of the sample properties with atomic force and kelvin probe force micrographs evidence the ferroelectric nature of the domains.

Graphical abstract: Ferroelectric domains in methylammonium lead iodide perovskite thin-films

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Publication details

The article was received on 13 Feb 2017, accepted on 08 Mar 2017 and first published on 09 Mar 2017


Article type: Paper
DOI: 10.1039/C7EE00420F
Citation: Energy Environ. Sci., 2017,10, 950-955
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    Ferroelectric domains in methylammonium lead iodide perovskite thin-films

    H. Röhm, T. Leonhard, M. J. Hoffmann and A. Colsmann, Energy Environ. Sci., 2017, 10, 950
    DOI: 10.1039/C7EE00420F

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