Dimensionality Reduction of Formamidinium-Rich Lead Iodide Perovskite-Derived Structures

Journal of the American Chemical Society 2026

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Authors: Takuya Ohmi, Wataru Taniguchi, Bhawna, Tomoya Fukui, Yuki Haruta, Takayuki Nakanishi, Takanori Fukushima, Makhsud I. Saidaminov, Masaki Azuma, Takafumi Yamamoto
DOI: 10.1021/jacs.5c17829
Cited by: 4
References: 30

Abstract

Formamidinium lead iodide, FAPbI 3 (FA + = CH(NH 2 ) 2 + ), 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 2 PbI 4, 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 2 PbI 4 and FA 3 PbI 5, 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.

Fields of Study & Subjects

Perovskite Materials and Applications Ferroelectric and Piezoelectric Materials Layered Double Hydroxides Synthesis and Applications

Publication details

Journal / source
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Volume
148
Issue
3
Pages
2858–2863
Publication date
13 January 2026
Language
EN