Branched intercalating cations regulate the structural evolution of two-dimensional perovskites
Two-dimensional metal halide perovskites (TMHPs) have emerged as prominent semiconductor materials in optoelectronic devices due to their composition-dependent properties. While previous research has concentrated on the types and the lengths of cations affecting TMHPs, our study systematically explores a new series of Dion-Jacobson (DJ)-phase TMHP structures featuring dithioketal-containing organic cations. Through X-ray crystallography and spectroscopy analyses, we demonstrate that steric hindrance from longer-branched groups distorts the structures and influences the photophysical behaviors of TMHPs. Additionally, we observe thermodynamically driven transitions from the DJ phase to the Ruddlesden-Popper (RP) phase when incorporating cations with extended branches, further impacting their structural and optoelectronic characteristics. Understanding and controlling these structural changes enable the design of TMHPs with tailored properties, opening avenues for advanced materials that enhance device performance.
Authors
- Le Ye (ORCID: https://orcid.org/0000-0003-0599-7762)
- Wenxuan Li (ORCID: https://orcid.org/0000-0003-1655-5353)
- Guoying Yao (ORCID: https://orcid.org/0000-0003-3720-6865)
- Shiang Li (ORCID: https://orcid.org/0009-0001-9565-9937)
- Jianjia He (ORCID: https://orcid.org/0000-0001-5987-3605)
- Xinhui Lu (ORCID: https://orcid.org/0000-0002-1908-3294)
- Tao Zeng (ORCID: https://orcid.org/0000-0002-1553-7850)
- Zhenyu Yang (ORCID: https://orcid.org/0000-0002-6403-8679)
- Haipeng Lu (ORCID: https://orcid.org/0000-0003-0252-3086)
- Zixuan Zhang (ORCID: https://orcid.org/0000-0003-2260-4705)
- Yilan Zhang (ORCID: https://orcid.org/0000-0003-0497-709X)
Institutions
- Sun Yat-sen University (CN)
- Chinese University of Hong Kong (HK)
- York University (CA)
- Hong Kong University of Science and Technology (HK)
- University of Hong Kong (HK)
Publication Details
- Journal
- Cell Reports Physical Science
- Published
- 2025-03-29
- DOI
- https://doi.org/10.1016/j.xcrp.2025.102509
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- York University
- National Natural Science Foundation of China
- Sun Yat-sen University
- Guangdong Science and Technology Department
- Natural Sciences and Engineering Research Council of Canada