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Updated: Aug 11, 2026
A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
High-Temperature Molecular Ferroelectric [C4N2H14]2[Sb2I10] with Narrow Bandgap and Switchable Photoelectric Response
Yongzheng Fang1, Na Zhang1, Jinrong Wen1
1School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
Abstract:
Organic-inorganic hybrid ferroelectrics have attracted considerable attention due to their outstanding piezoelectricity, mechanical flexibility, and robust nonlinear optical properties. But the species with above room-temperature (RT) ferroelectricity, visible-light bandgap, and high photoelectric performance are still scarce. Herein, a novel organic-inorganic hybrid ferroelectric [C4N2H14]2[Sb2I10] has been synthesized hydrothermally and employed as a light-absorbing layer in organic-inorganic hybrid solar cells. A polar monoclinic structure with a space group of Pn was resolved by single-crystal XRD. A direct band gap of 1.89 eV was revealed in [C4N2H14]2[Sb2I10] by UV-vis spectroscopy and density functional theory (DFT) studies. A dramatic enhancement in photoelectric performance has been achieved by turning the ferroelectric polarization, leading to a maximum Voc ∼ 0.52 V and Jsc ∼ 15.52 μA/cm2, which are 15-fold and 29-fold higher than those of the unpoled sample, respectively. This work may open new avenues for the application of molecular ferroelectrics in optoelectronic devices.
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