CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance

To experimentally (dis)prove ferroelectric effects on the properties of lead-halide perovskites and of solar cells, based on them, we used second-harmonic-generation spectroscopy and the periodic temperature change (Chynoweth) technique to detect the polar nature of methylammonium lead bromide (MAPb...

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Main Authors: Yevgeny Rakita, Elena Meirzadeh, Tatyana Bendikov, Vyacheslav Kalchenko, Igor Lubomirsky, Gary Hodes, David Ehre, David Cahen
Format: Article
Language:English
Published: AIP Publishing LLC 2016-05-01
Series:APL Materials
Online Access:http://dx.doi.org/10.1063/1.4949760
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spelling doaj-d98e0c47e39d4c7ebfb4d6cb56fee74e2020-11-25T00:00:50ZengAIP Publishing LLCAPL Materials2166-532X2016-05-0145051101051101-810.1063/1.4949760003605APMCH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performanceYevgeny Rakita0Elena Meirzadeh1Tatyana Bendikov2Vyacheslav Kalchenko3Igor Lubomirsky4Gary Hodes5David Ehre6David Cahen7Materials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, IsraelMaterials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, IsraelMaterials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, IsraelVeterinary Resources Department, Weizmann Institute of Science, Rehovot 7610001, IsraelMaterials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, IsraelMaterials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, IsraelMaterials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, IsraelMaterials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, IsraelTo experimentally (dis)prove ferroelectric effects on the properties of lead-halide perovskites and of solar cells, based on them, we used second-harmonic-generation spectroscopy and the periodic temperature change (Chynoweth) technique to detect the polar nature of methylammonium lead bromide (MAPbBr3). We find that MAPbBr3 is probably centrosymmetric and definitely non-polar; thus, it cannot be ferroelectric. Whenever pyroelectric-like signals were detected, they could be shown to be due to trapped charges, likely at the interface between the metal electrode and the MAPbBr3 semiconductor. These results indicate that the ferroelectric effects do not affect steady-state performance of MAPbBr3 solar cells.http://dx.doi.org/10.1063/1.4949760
collection DOAJ
language English
format Article
sources DOAJ
author Yevgeny Rakita
Elena Meirzadeh
Tatyana Bendikov
Vyacheslav Kalchenko
Igor Lubomirsky
Gary Hodes
David Ehre
David Cahen
spellingShingle Yevgeny Rakita
Elena Meirzadeh
Tatyana Bendikov
Vyacheslav Kalchenko
Igor Lubomirsky
Gary Hodes
David Ehre
David Cahen
CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance
APL Materials
author_facet Yevgeny Rakita
Elena Meirzadeh
Tatyana Bendikov
Vyacheslav Kalchenko
Igor Lubomirsky
Gary Hodes
David Ehre
David Cahen
author_sort Yevgeny Rakita
title CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance
title_short CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance
title_full CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance
title_fullStr CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance
title_full_unstemmed CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance
title_sort ch3nh3pbbr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance
publisher AIP Publishing LLC
series APL Materials
issn 2166-532X
publishDate 2016-05-01
description To experimentally (dis)prove ferroelectric effects on the properties of lead-halide perovskites and of solar cells, based on them, we used second-harmonic-generation spectroscopy and the periodic temperature change (Chynoweth) technique to detect the polar nature of methylammonium lead bromide (MAPbBr3). We find that MAPbBr3 is probably centrosymmetric and definitely non-polar; thus, it cannot be ferroelectric. Whenever pyroelectric-like signals were detected, they could be shown to be due to trapped charges, likely at the interface between the metal electrode and the MAPbBr3 semiconductor. These results indicate that the ferroelectric effects do not affect steady-state performance of MAPbBr3 solar cells.
url http://dx.doi.org/10.1063/1.4949760
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