Dimensionality Reduction of Formamidinium-Rich Lead Iodide Perovskite-Derived Structures
Formamidinium lead iodide, FAPbI<sub>3</sub> (FA<sup>+</sup> = CH(NH<sub>2</sub>)<sub>2</sub><sup>+</sup>), with a cubic perovskite structure is among the most studied organic-inorganic hybrid perovskites. Despite several reports only on thin films of FA-rich lead iodide perovskites, such as FA<sub>2</sub>PbI<sub>4</sub>, their structures remain unknown due to challenges in characterizing polycrystalline films. Here, we report two new phases of FA-rich lead iodide perovskite-derived structures, FA<sub>2</sub>PbI<sub>4</sub> and FA<sub>3</sub>PbI<sub>5</sub>, in the bulk form. These materials feature two- and one-dimensional octahedral networks of perovskite, respectively, allowing for bandgap tuning among FA-Pb-I compositions. This study presents a novel approach to controlling the structural dimensionality of perovskites and their optical properties.
Authors
- Takanori Fukushima (ORCID: https://orcid.org/0000-0001-5586-9238)
- Takafumi Yamamoto (ORCID: https://orcid.org/0000-0002-7960-1014)
- Takayuki Nakanishi (ORCID: https://orcid.org/0000-0003-3412-2842)
- Takuya Ohmi (ORCID: https://orcid.org/0000-0001-9761-134X)
- Wataru Taniguchi
- Masaki Azuma (ORCID: https://orcid.org/0000-0002-8378-321X)
- Tomoya Fukui (ORCID: https://orcid.org/0009-0005-4612-285X)
- Makhsud I. Saidaminov
- Bhawna
- Yuki Haruta
Institutions
- National Institute for Materials Science (JP)
- University of Victoria (CA)
- Kyoto University (JP)
- PhosphorTech (United States) (US)
- Life Science Institute (JP)
- Kanagawa Industrial Technology Center (JP)
- Institute of Science Tokyo (JP)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2026-01-13
- DOI
- https://doi.org/10.1021/jacs.5c17829
- Citations
- 3
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 65.79