Layered 2D Halide Perovskites beyond the Ruddlesden–Popper Phase: Tailored Interlayer Chemistries for High-Performance Solar Cells

Jue Gong, Mingwei Hao, Yalan Zhang, Mingzhen Liu*, Yuanyuan Zhou*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

63 Citations (Scopus)


Dion–Jacobson (DJ) and alternating-cation-interlayer (ACI) phases are two emerging types of layered 2D halide perovskites with high potential in balanced charge-transport properties and chemical stability. By tailoring the molecular, thin-film, and device chemistries, high-performance solar cells have been demonstrated.

Layered halide perovskites (LHPs) with crystallographically 2D structures have gained increasing interest for photovoltaic applications due to their superior chemical stability and intriguing anisotropic properties, which are in contrast to their conventional 3D perovskite counterparts. The most frequently studied LHPs are Ruddlesden?Popper (RP) phases, which suffer from a carrier-transport bottleneck due to the van der Waals gap associated with their intrinsic organic interlayer structures. To address this issue, Dion?Jacobson (DJ) and alternating-cation-interlayer (ACI) LHPs have rapidly emerged, which exhibit unique structural and (opto)electronic characteristics that may resemble those of the 3D counterparts owing to the eliminated or reduced van der Waals gap. Improved photophysical properties have been achieved in DJ and ACI LHPs, leading towards better photovoltaic performance. Here we provide a comprehensive discussion on the merits and promises of DJ and ACI LHPs from a chemistry perspective. Then, we review recent progress on the synthesis and tailoring of DJ and ACI LHP crystals and thin films, as well as their optoelectronic properties and photovoltaic performance. Finally, we discuss possible pathways to overcome critical challenges to realize the full potential of DJ and ACI LHPs for high-performance solar cells and beyond.
Original languageEnglish
Article numbere202112022
Number of pages13
JournalAngewandte Chemie. International Edition
Issue number10
Early online date10 Nov 2021
Publication statusPublished - 1 Mar 2022

Scopus Subject Areas

  • Chemistry(all)
  • Catalysis

User-Defined Keywords

  • Dion–Jacobson phases
  • Ruddlesden–Popper phases
  • alternating cation in interlayer phases
  • perovskites
  • solar cells


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