Mixing of Spacer Cations in 2D Halide Perovskites
. Our findings show that mixing spacers can lead to higher symmetry, significantly suppress out-of-plane tilting, and give rise to a unique rippling structure in some systems. The optical bandgaps of the mixed-spacer 2D perovskites are typically located between those of the two parent phases. Finally, we extend this approach to systems incorporating up to five spacers in a single system, with phase purity confirmed through powder and single-crystal X-ray diffraction characterizations. This work offers simple yet practical indicators for selecting compatible spacer cations, providing a pathway to better understand how spacer mixing influences the structural, physical, and optical properties of 2D perovskites.
Authors
- V. Mahdikhah (ORCID: https://orcid.org/0009-0009-9572-5381)
- Somayeh Kashani (ORCID: https://orcid.org/0000-0002-2702-2774)
- Renee Wu (ORCID: https://orcid.org/0000-0002-9521-1657)
- S. Mukherjee (ORCID: https://orcid.org/0000-0002-5479-3750)
- Thu T M Chu
- Harald Ade
- Xiaotong Li
- Peijun Guo
- Xiang-Bin Han
Institutions
- North Carolina State University (US)
- Yale University (US)
- Wallace Laboratories (US)
- Nano Carbon (Poland) (PL)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2026-04-30
- DOI
- https://doi.org/10.1021/jacs.6c03761
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy
- North Carolina State University
- Research Opportunities Initiative, University of North Carolina
- Office of Naval Research
- Division of Materials Research