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PreprintCC BYChemRxiv

Inter-Phase Chirality Transfer in 2D and Quasi-2D Perovskite Heterostructures

  • Raphael F. Moral1,2,3,4,5,6
  • Audrey R. Ryan5,6,7,8
  • Jian Zhang5,6
  • Paulo E. Marchezi9,10,11,12
  • Ana F. Nogueira9,10
  • Craig P. Schwartz3,4,13,14
  • Carolin M. Sutter-Fella5,6
14 affiliations
  1. 1Brazilian Synchrotron Light Laboratory
  2. 2The Brazilian Center for Research in Energy and Materials
  3. 3Department of Physics & Astronomy
  4. 4University of Nevada Las Vegas, Las Vegas
  5. 5Molecular Foundry
  6. 6Lawrence Berkeley National Laboratory
  7. 7College of Engineering
  8. 8University of California, Berkeley
  9. 9Institute of Chemistry
  10. 10University of Campinas
  11. 11Institute of Physics
  12. 12Federal University of Mato Grosso
  13. 13X-ray Sciences Division
  14. 14Argonne National Laboratory
Open at sourceDOICite

Abstract

Two-dimensional (2D) chiral metal halide perovskites (CMHPs) emerged as promising materials for spintronics. These 2D semiconductors comprise single layers of corner-sharing metal halide octahedra (n = 1) intercalated by organic cations, which limits charge mobility and spin lifetime. In comparison, quasi-2D analogs, with two or more octahedra layers (n β‰₯ 2), exhibit higher charge carriers mobility, augmented spin lifetime, and tailorable bandgap. Nonetheless, the few reports on quasi-2D CMHPs in the literature often describe time-consuming synthesis and materials presenting poor chiroptical properties after processing. We address this limitation by designing heterostructure thin films comprising a chiral n = 1 phase with a non-chiral n = 2 phase. Circular dichroism (CD) manifestation in the non-chiral phase confirms chirality transfer in the heterostructures. We found that chirality transfer depends on the intermolecular interaction of the chiral and non-chiral cations, being effective when R-/S-𝛼-methylbenzylammonium (MBA) in the chiral phase is combined with benzylammonium (BZA) in the non-chiral phase. Chirality transfer is weak when n-butylammonium (BA) is used in the non-chiral phase. We attribute this difference to a more effective intermixing enabled by πœ‹-πœ‹ stacking in the MBA/BZA heterostructure. This inter-phase chirality transfer strategy opens a new avenue for spintronic materials design.

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Cite

BibTeXRIS
BibTeX
@misc{moral2026interphase,
  title = {{Inter-Phase Chirality Transfer in 2D and Quasi-2D Perovskite Heterostructures}},
  author = {Raphael F. Moral and Audrey R. Ryan and Jian Zhang and Paulo E. Marchezi and Ana F. Nogueira and Craig P. Schwartz and Carolin M. Sutter-Fella},
  howpublished = {ChemRxiv},
  year = {2026},
  month = sep,
  doi = {10.26434/chemrxiv.15008869/v1},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008869/v1},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - Inter-Phase Chirality Transfer in 2D and Quasi-2D Perovskite Heterostructures
AU  - Raphael F. Moral
AU  - Audrey R. Ryan
AU  - Jian Zhang
AU  - Paulo E. Marchezi
AU  - Ana F. Nogueira
AU  - Craig P. Schwartz
AU  - Carolin M. Sutter-Fella
PY  - 2026
DA  - 2026/09/15
PB  - ChemRxiv
DO  - 10.26434/chemrxiv.15008869/v1
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008869/v1
AB  - Two-dimensional (2D) chiral metal halide perovskites (CMHPs) emerged as promising materials for spintronics. These 2D semiconductors comprise single layers of corner-sharing metal halide octahedra (n = 1) intercalated by organic cations, which limits charge mobility and spin lifetime. In comparison, quasi-2D analogs, with two or more octahedra layers (n β‰₯ 2), exhibit higher charge carriers mobility, augmented spin lifetime, and tailorable bandgap. Nonetheless, the few reports on quasi-2D CMHPs in the literature often describe time-consuming synthesis and materials presenting poor chiroptical properties after processing. We address this limitation by designing heterostructure thin films comprising a chiral n = 1 phase with a non-chiral n = 2 phase. Circular dichroism (CD) manifestation in the non-chiral phase confirms chirality transfer in the heterostructures. We found that chirality transfer depends on the intermolecular interaction of the chiral and non-chiral cations, being effective when R-/S-𝛼-methylbenzylammonium (MBA) in the chiral phase is combined with benzylammonium (BZA) in the non-chiral phase. Chirality transfer is weak when n-butylammonium (BA) is used in the non-chiral phase. We attribute this difference to a more effective intermixing enabled by πœ‹-πœ‹ stacking in the MBA/BZA heterostructure. This inter-phase chirality transfer strategy opens a new avenue for spintronic materials design.
ER  -