Ruddlesden–Popper 2D Chiral Perovskite-Based Solar Cells

Adva Shpatz Dayan, Małgorzata Wierzbowska, Lioz Etgar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


In this work, 2D chiral perovskite is demonstrated, where the barrier molecules are the two enantiomers (R)-(+)-α-Methylbenzylamine (R-MBA) and (S)-(-)-α-Methylbenzylamine (S-MBA). The chirality is manifested at high χ values and pure 2D structure measured by circular dichroism (CD) (where the perovskite general formula is ABX3 χ (S/R-MBA)2PbI4, χ is the ratio of the barrier molecule to the small cation (A+)). The anisotropy factor (gabs) decreased by an order of magnitude when decreasing the χ value achieving 0.0062 for pure 2D. Ab initio many-body perturbation theory successfully describes the bandgaps, absorbance, and CD measurements. For the first time, these quasi-2D chiral perovskites are integrated into the solar cell. Using circular polarization (CP) and cutoff filter, the chirality effect from the solar cells photovoltaic response is able to be distinguished. It is revealed that at high χ values, the chirality affects the current density of the solar cell more than at low χ values while the open-circuit voltage didn't change. These chiral 2D perovskite are new class of materials which open the way for polarized hybrid perovskite.

Original languageAmerican English
Article number2200051
JournalSmall Structures
Issue number8
StatePublished - Aug 2022

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© 2022 Wiley-VCH GmbH.


  • 2D perovskites
  • anisotropy factor
  • chirality
  • circular dichroism
  • solar cells


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