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Comment on "ferroelectricity-free lead halide perovskites" by A. Gomez, Q. Wang, A. R. Goni, M. Campoy-Quiles and A. Abate, Energy Environ. Sci., 2019, 12, 2537

Colsmann, Alexander ORCID iD icon 1,2; Leonhard, Tobias 1,2; Schulz, Alexander D. ORCID iD icon 1,2; Röhm, Holger ORCID iD icon 1,2
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)
2 Materialwissenschaftliches Zentrum für Energiesysteme (MZE), Karlsruher Institut für Technologie (KIT)


This article comments on the recent publication ‘‘Ferroelectricity-free lead halide perovskites’’ by Gomez´et al. [DOI: 10.1039/c9ee00884e], in which the authors conclude that both methylammonium lead iodide (MAPbI$_{3}$) and the more advanced Cs$_{0.05}$(FA$_{0.83}$MA$_{0.17}$)$_{0.95}$Pb(I$_{0.83}$Br$_{0.17}$)$_{3}$ form non-ferroelectric thin-films. This conclusion is based on measuring the vertical piezoelectric effect by ‘‘direct piezoelectric force microscopy’’ (DPFM) and not seeing any domain patterns or other ferroelectric responses. The authors calibrated their measurement using a bulk reference sample of periodically poled lithium niobate with vertical polarization, which has all-different properties from MAPbI$_{3}$ or Cs$_{0.05}$(FA$_{0.83}$MA$_{0.17}$)$_{0.95}$Pb(I$_{0.83}$Br$_{0.17}$)$_{3}$ thin-films. In earlier works, it was pointed out that the polarization in large MAPbI$_{3}$ grains is vastly oriented in-plane and hence could remain invisible to any probing techniques with vertical sensitivity. In addition, the low spatial resolution of their measurements, the strong measurement noise, potential adventitious water contamination and the use of improper cantilever loads reduces the sensitivity of the measurement setup. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000121970
Veröffentlicht am 23.07.2020
DOI: 10.1039/c9ee04159a
Web of Science
Zitationen: 6
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Lichttechnisches Institut (LTI)
Materialwissenschaftliches Zentrum für Energiesysteme (MZE)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.06.2020
Sprache Englisch
Identifikator ISSN: 1754-5692, 1754-5706
KITopen-ID: 1000121970
Erschienen in Energy & environmental science
Verlag Royal Society of Chemistry (RSC)
Band 13
Heft 6
Seiten 1888–1891
Nachgewiesen in Dimensions
Web of Science
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