Alkaline Earth Metal‐Based Hybrid Organic‐Inorganic Perovskite‐Like Ferroelectrics
Abstract
AbstractHybrid organic‐inorganic perovskites (HOIPs) with the ABX3 formula have garnered significant scientific interest owing to their substantial technological promise in photovoltaics, optoelectronics and ferroelectrics. Their structural diversity and molecular‐scale chemical programmability provide an exceptional platform for engineering diverse functional HOIP architectures through targeted compositional design. However, the strategic potential of alkaline earth metals (e.g., Ca, Sr, and Ba) in HOIP assembly remains largely unexplored, with ferroelectric implementations yet to be realized, despite their historical roots in perovskite evolution dating back to the eponymous CaTiO3 mineral discovered in 1839. Here, for the first time, we report a new family of alkaline earth metal‐based HOIP‐like ferroelectrics. Benefiting from three‐dimensional cage‐like structure and multiaxial characteristics, (pyrrolidinium)Ba(ClO4)3 as a representative shows pronounced ferroelectricity with robust polarization switching in both bulk single crystals and compressed polycrystalline powder pellets. Molecular fluorination strategy on pyrrolidinium cation further optimizes the comprehensive ferroelectric properties (R‐3‐fluoropyrrolidinium)Ba(ClO4)3, enhancing Curie temperature, increasing polar axes and doubling polarization values. Combined with their easy preparation and good plasticity, this discovery provides a brand‐new structural paradigm for HOIP ferroelectrics and highlights exceptional promise in emerging flexible ferroelectric applications.
Article Details
Authors (12)
Qi‐Fang Zhou
Institute for Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 P.R. China
Lei Pan
Department of Chemistry
Hao‐Fei Ni
Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 P. R. China
Lou‐Kai Ye
Institute For Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 People's Republic of China
Yan‐Ping Zhao
Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 P.R. China
Qing‐Ke Luo
Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 P.R. China
Gele Teri
Jia‐Qi Luo
Institute For Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 People's Republic of China
Da‐Wei Fu
Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 P. R. China
Zhi‐Xu Zhang
Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 P. R. China
Chao Shi
Yi Zhang