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 journalArticlepeer-review

36 Scopus citations


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 languageEnglish
Article number051101
JournalAPL Materials
Issue number5
StatePublished - 1 May 2016
Externally publishedYes

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).


Dive into the research topics of 'CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance'. Together they form a unique fingerprint.

Cite this