Piezoelectricity in NbOI2 for piezotronics and nanogenerators

IF 9.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj 2D Materials and Applications Pub Date : 2024-09-16 DOI:10.1038/s41699-024-00498-1

Yuanyuan Cui, Tingjun Wang, Deng Hu, Zhiwei Wang, Jiawang Hong, Xueyun Wang

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Abstract

2-dimensional (2D) piezoelectric materials have gained significant attention due to their potential applications in flexible energy harvesting and storage devices. Recently, niobium oxide dihalides NbOI2 stands out as a multifunctional anisotropic semiconductor family with an exceptionally high lateral piezoelectric constant (~21.8 pm/V), making it a promising candidate for energy conversion applications. Here we report the experimental observation of anisotropic in-plane piezoelectricity in multilayer NbOI2. Current-voltage relationships reveal a significant piezotronic effect in two typical crystalline orientations. Additionally, cyclic tensile and release experiments demonstrate an intrinsic current output of up to 140 pA when subjected to a tensile strain of 0.51%. A flexible piezoelectric nanogenerator prototype is demonstrated on the human finger and wrist, which opens up new avenues for the development of wearable electronic devices and provides valuable insights for further exploration in this field.

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用于压电电子学和纳米发电机的 NbOI2 的压电性

二维（2D）压电材料因其在柔性能量采集和存储设备中的潜在应用而备受关注。最近，氧化铌二卤化物 NbOI2 作为一种多功能各向异性半导体家族脱颖而出，具有极高的横向压电常数（约 21.8 pm/V），使其成为能量转换应用的理想候选材料。在此，我们报告了在多层 NbOI2 中观察到的各向异性面内压电的实验结果。电流-电压关系揭示了两种典型晶体取向的显著压电效应。此外，循环拉伸和释放实验表明，当受到 0.51% 的拉伸应变时，本征电流输出可达 140 pA。在人的手指和手腕上演示了柔性压电纳米发电机原型，这为开发可穿戴电子设备开辟了新途径，并为该领域的进一步探索提供了宝贵的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

npj 2D Materials and Applications Engineering-Mechanics of Materials

CiteScore

14.50

自引率

2.10%

发文量

审稿时长

15 weeks

期刊介绍： npj 2D Materials and Applications publishes papers on the fundamental behavior, synthesis, properties and applications of existing and emerging 2D materials. By selecting papers with the potential for impact, the journal aims to facilitate the transfer of the research of 2D materials into wide-ranging applications.