Unusual bendable soft molecule-based ferroelectric crystals enabling the flexible photo-pyroelectric detection

IF 22.7 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Infomat Pub Date : 2024-06-04 DOI:10.1002/inf2.12593
Liwei Tang, Xinxu Zhu, Yu Ma, Haojie Xu, Shiguo Han, Yi Liu, Yaoyao Chen, Daohua Wang, Junhua Luo, Zhihua Sun
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引用次数: 0

Abstract

Soft molecule-based ferroelectrics with unique structural flexibility hold a promise for versatile applications of non-volatile memory, imaging and photovoltaic devices. Except for few polymers (e.g., polyvinylidene fluoride, PVDF), it is challenging to exploit soft ferroelectric crystals toward free-standing flexible photoactive devices. We here report a multiaxial soft molecule-based ferroelectric, (n-PA)2PbCl4 (1, where n-PA+ is n-pentylammonium), of which spontaneous polarization can be reversibly switched in both crystal and powder forms. Strikingly, single crystals of 1 have unusual structural flexibility and bendability, achieving the self-standing bending with a bending radius of ~0.22 mm. Besides, the pyroelectric activities are also preserved for these single crystals after several bending cycles. Further, the bendable crystal-based photodetector of 1 allows broadband photoactivities via the photo-pyroelectric effect, covering a wide range from 405 to 940 nm spectral region, breaking through the limit of optical absorption bandgap. As the first study of bendable free-standing photo-pyroelectric detectors in ferroelectric crystals, our work sheds light on the assembly of flexible smart photoelectric devices.

Abstract Image

Abstract Image

基于软分子的非同寻常的可弯曲铁电晶体,可实现灵活的光聚合电探测
基于软分子的铁电体具有独特的结构柔性,有望在非易失性存储器、成像和光电设备等领域得到广泛应用。除少数聚合物(如聚偏氟乙烯)外,利用软铁电晶体制造独立的柔性光电器件具有挑战性。我们在此报告了一种基于软分子的多轴铁电体--(n-PA)2PbCl4(1,其中 n-PA+ 为正戊基铵),它的自发极化可以在晶体和粉末两种形态下进行可逆切换。引人注目的是,1 的单晶体具有非同寻常的结构柔韧性和可弯曲性,可实现自立弯曲,弯曲半径约为 0.22 毫米。此外,这些单晶体在多次弯曲后仍能保持热释电活性。此外,1 的可弯曲晶体光电探测器通过光致热释电效应实现了宽带光电活动,覆盖了从 405 纳米到 940 纳米的宽光谱范围,突破了光吸收带隙的限制。作为首次在铁电晶体中研究可弯曲的独立光电探测器,我们的工作为组装柔性智能光电器件提供了启示。
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来源期刊
Infomat
Infomat MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
37.70
自引率
3.10%
发文量
111
审稿时长
8 weeks
期刊介绍: InfoMat, an interdisciplinary and open-access journal, caters to the growing scientific interest in novel materials with unique electrical, optical, and magnetic properties, focusing on their applications in the rapid advancement of information technology. The journal serves as a high-quality platform for researchers across diverse scientific areas to share their findings, critical opinions, and foster collaboration between the materials science and information technology communities.
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