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

ASJC Scopus subject areas

  • Materials Science (all)
  • Engineering (all)


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