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author:

Gómez, A. (Gómez, A..) [1] | Wang, Q. (Wang, Q..) [2] | Goñi, A.R. (Goñi, A.R..) [3] | Campoy-Quiles, M. (Campoy-Quiles, M..) [4] | Abate, A. (Abate, A..) [5]

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Scopus

Abstract:

Direct piezoelectric force microscopy (DPFM) is employed to examine whether or not lead halide perovskites exhibit ferroelectricity. Compared to conventional piezoelectric force microscopy, DPFM is a novel technique capable of measuring piezoelectricity directly. This fact is fundamental to be able to examine the existence of ferroelectricity in lead halide perovskites, an issue that has been under debate for several years. DPFM is used to detect the current signals, i.e. changes in the charge distribution under the influence of the scan direction and applied force of the atomic force microscope (AFM) tip in contact mode. For comparison, (i) we use DPFM on lead halide perovskites and well-known ferroelectric materials (i.e. periodically poled lithium niobate and lead zirconate titanate); and (ii) we conduct parallel experiments on MAPbI3 films of different grain sizes, film thicknesses, substrates, and textures using DPFM as well as piezoelectric force microscopy (PFM) and electrostatic force microscopy (EFM). In contrast to previous work that claimed there were ferroelectric domains in MAPbI3 perovskite films, our work shows that the studied perovskite films Cs0.05(FA0.83MA0.17)0.95Pb(I0.83Br0.17)3 and MAPbI3 are ferroelectricity-free. The observed current profiles of lead halide perovskites possibly originate from ion migration that happens under an applied electrical bias and in strained samples under mechanical stress. This work provides a deeper understanding of the fundamental physical properties of the organic-inorganic lead halide perovskites and solves a longstanding dispute about their non-ferroelectric character: an issue of high relevance for optoelectronic and photovoltaic applications. © The Royal Society of Chemistry 2019.

Keyword:

Community:

  • [ 1 ] [Gómez, A.]Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193, Spain
  • [ 2 ] [Wang, Q.]Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstrasse 5, Berlin, 12489, Germany
  • [ 3 ] [Goñi, A.R.]Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193, Spain
  • [ 4 ] [Goñi, A.R.]ICREA Passeig Lluís Companys 23, Barcelona, 08010, Spain
  • [ 5 ] [Campoy-Quiles, M.]Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193, Spain
  • [ 6 ] [Abate, A.]Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstrasse 5, Berlin, 12489, Germany
  • [ 7 ] [Abate, A.]Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian, 350002, China
  • [ 8 ] [Abate, A.]Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, Fuorigrotta, Naples, 80125, Italy

Reprint 's Address:

  • [Gómez, A.]Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC), Campus UABSpain

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Source :

Energy and Environmental Science

ISSN: 1754-5692

Year: 2019

Issue: 8

Volume: 12

Page: 2537-2547

3 0 . 2 8 9

JCR@2019

3 2 . 4 0 0

JCR@2023

ESI HC Threshold:188

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 81

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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