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Halogen substitution strategy of spacer cations in two-dimensional perovskite ferroelectrics gives giant anomalous photovoltaic effect

The regulation of ferroelectric photovoltaic properties has been challenging. Here, authors substitute the p-site of cations with halogen for tuning distortion degree of inorganic layer and electric dipole moment of aromatic spacer, achieving ferroelectric anomalous photovoltaic effect of 38.2 V.

Wenjing Li
Yu Ma
Zhihua Sun
ResearchOpen Access14 Aug 2025
Nature Communications

Volume: 16, P: 1-8
Record high-T_c and large practical utilization level of electric polarization in metal-free molecular antiferroelectric solid solutions

Molecular ferroic materials receive considerable interest in view of field-induced switchable polar/magnetic orders. Here, the authors exploit metal-free antiferroelectrics in molecular solid solutions to assemble high-performance ferroic materials.

Haojie Xu
Wuqian Guo
Zhihua Sun
ResearchOpen Access10 Sept 2022
Nature Communications

Volume: 13, P: 1-7
A molecular pyroelectric enabling broadband photo-pyroelectric effect towards self-driven wide spectral photodetection

Broadband spectral photoresponse has potential for optoelectronic devices, but obtaining high photoactivity beyond the material bandgap is challenging. Here, the authors report the development of a molecular pyroelectric material with broadband photopyroelectric effects.

Xi Zeng
Yi Liu
Zhihua Sun
ResearchOpen Access19 Sept 2023
Nature Communications

Volume: 14, P: 1-8
A high-temperature double perovskite molecule-based antiferroelectric with excellent anti-breakdown capacity for energy storage

Antiferroelectric (AFE) materials are emerging as a remarkable candidate for efficient energy-storage applications. Here, the authors report on a high-temperature, lead-free, AFE perovskite, (CHMA)₂CsAgBiBr₇ (where CHMA is cyclohexylmethylammonium) with high fatigue endurance at a high electric breakdown field strength.

Yi Liu
Yu Ma
Zhihua Sun
ResearchOpen Access27 Apr 2023
Nature Communications

Volume: 14, P: 1-9
Tailoring of a visible-light-absorbing biaxial ferroelectric towards broadband self-driven photodetection

2D lead-iodide ferroelectrics usually possess a wide bandgap along with the lacking of ferroelectric bulk photovoltaic effects due to the monolayered inorganic perovskite sheets. Here, the authors present a pathway to increase the thickness of inorganic sheets while retaining ferroelectricity.

Shiguo Han
Maofan Li
Junhua Luo
ResearchOpen Access12 Jan 2021
Nature Communications

Volume: 12, P: 1-9

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Halogen substitution strategy of spacer cations in two-dimensional perovskite ferroelectrics gives giant anomalous photovoltaic effect

Record high-Tc and large practical utilization level of electric polarization in metal-free molecular antiferroelectric solid solutions

A molecular pyroelectric enabling broadband photo-pyroelectric effect towards self-driven wide spectral photodetection

A high-temperature double perovskite molecule-based antiferroelectric with excellent anti-breakdown capacity for energy storage

Tailoring of a visible-light-absorbing biaxial ferroelectric towards broadband self-driven photodetection

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Record high-T_c and large practical utilization level of electric polarization in metal-free molecular antiferroelectric solid solutions