CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance

Yevgeny Rakita; Elena Meirzadeh; Tatyana Bendikov; Vyacheslav Kalchenko; Igor Lubomirsky; Gary Hodes; David Ehre; David Cahen

doi:10.1063/1.4949760

CH₃NH₃PbBr₃ is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance

Yevgeny Rakita, Elena Meirzadeh, Tatyana Bendikov, Vyacheslav Kalchenko, Igor Lubomirsky, Gary Hodes, David Ehre, David Cahen

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

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.

Original language	English
Article number	051101
Journal	APL Materials
Volume	4
Issue number	5
DOIs	https://doi.org/10.1063/1.4949760
State	Published - 1 May 2016
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the Israel Science Foundation, the Israel Ministry of Science, the Israel National Nano-Initiative and by the Kimmel Centre for Nanoscience and the Grand Centre for Sensors and Security, both at the Weizmann Institute. D.C. holds the Sylvia and Rowland Schaefer Chair in Energy Research.

Publisher Copyright:
© 2016 Author(s).

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10.1063/1.4949760

Cite this

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abstract = "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.",

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AU - Rakita, Yevgeny

AU - Meirzadeh, Elena

AU - Bendikov, Tatyana

AU - Kalchenko, Vyacheslav

AU - Lubomirsky, Igor

AU - Hodes, Gary

AU - Ehre, David

AU - Cahen, David

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