Issue 40, 2024

The H/F substitution strategy can achieve large spontaneous polarization in 1D hybrid perovskite ferroelectrics

Abstract

Hybrid organic–inorganic perovskite (HOIP) ferroelectrics exhibit polarization reversibility and have a wide range of applications in the fields of smart switches, memorizers, sensors, etc. However, the inherent limitations of small spontaneous polarization (Ps) and large coercive field (Ec) in ferroelectrics have impeded their broader utilization in electronics and data storage. Molecular ferroelectrics, as a powerful supplement to inorganic ferroelectrics, have shown great potential in the new generation of flexible wearable electronic devices. The important research responsibility is to greatly improve progressiveness and overcome the above limitations. Here, a novel one-dimensional (1D) HOIP ferroelectric, (3-F-BTAB)PbBr3 (3-F-BTAB = 3-fluorobenzyltrimethylammonium), was successfully synthesized by employing the H/F substitution strategy to modify parent compound (BTAB)PbBr3 (BTAB = benzyltrimethylammonium), which undergoes a ferroelectric phase transition with Aizu notation 2/mF2 at 420 K. Notably, (3-F-BTAB)PbBr3 demonstrates exceptional ferroelectric properties with a large Ps of 7.18 μC cm−2 and a low Ec of 1.78 kV cm−1. As far as we know, (3-F-BTAB)PbBr3 features the largest Ps among those reported for 1D lead-based HOIP ferroelectrics. This work enriches the 1D lead-based ferroelectric family and provides guidance for applying ferroelectrics in low-voltage polar memories.

Graphical abstract: The H/F substitution strategy can achieve large spontaneous polarization in 1D hybrid perovskite ferroelectrics

Supplementary files

Article information

Article type
Edge Article
Submitted
31 May 2024
Accepted
12 Sep 2024
First published
13 Sep 2024
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2024,15, 16612-16617

The H/F substitution strategy can achieve large spontaneous polarization in 1D hybrid perovskite ferroelectrics

J. Liu, M. Lun, Z. Wang, J. Li, K. Ding, D. Fu, H. Lu and Y. Zhang, Chem. Sci., 2024, 15, 16612 DOI: 10.1039/D4SC03571B

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