Dion-Jacobson Two-Dimensional Perovskite Solar Cells Based on Benzene Dimethanammonium Cation

Bat El Cohen, Yiming Li, Qingbo Meng, Lioz Etgar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

150 Scopus citations


Organic-inorganic perovskite structured compounds have recently emerged as attractive materials in the fields of photovoltaic due to their exciting optical properties and easy syntheses, as well as exceptional structural and optical tunability. This work presents a Dion-Jacobson two-dimensional (2D) perovskite using diammonium as the barrier molecule. We show that the diammonium barrier molecule is responsible for the perovskite layers' orientation supported by Hall Effect measurements, which results in a high efficiency solar cell for 2D perovskite without the need for additives or any additional treatment. The 2D perovskite cells achieved an efficiency of 15.6%, which was one of the highest reported for low-dimensional perovskite. Charge extraction, voltage decay, and charge collection efficiency measurements show the beneficial alignment of the 2D perovskites related to the selective contacts. Stability characterization shows that the stability for the 2D perovskite was enhanced compared with their 3D counterparts.

Original languageAmerican English
Pages (from-to)2588-2597
Number of pages10
JournalNano Letters
Issue number4
StatePublished - 10 Apr 2019

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.


  • Perovskite
  • optoelectronics
  • renewable energy
  • solar cells
  • stability of PSCs
  • two-dimensional perovskite


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