材料科学
纳米发生器
肖特基势垒
光电子学
极化
半导体
肖特基二极管
铁电性
压电
钙钛矿(结构)
能量收集
纳米技术
电介质
能量(信号处理)
二极管
复合材料
数学
统计
工程类
化学工程
作者
Feng Jiang,Gurunathan Thangavel,Xinran Zhou,Gupta Adit,Hongbo Fu,Jian Lv,Lixin Zhan,Yihui Zhang,Pooi See Lee
标识
DOI:10.1002/adma.202302815
摘要
Abstract The tribovoltaic nanogenerator (TVNG), a promising semiconductor energy technology, displays outstanding advantages such as low matching impedance and continuous direct‐current output. However, the lack of controllable and stable performance modulation strategies is still a major bottleneck that impedes further practical applications of TVNG. Herein, by leveraging the ferroelectricity‐enhanced mechanism and the control of interfacial energy band bending, a lead‐free perovskite‐based (3,3‐difluorocyclobutylammonium) 2 CuCl 4 ((DF‐CBA) 2 CuCl 4 )/Al Schottky junction TVNG is constructed. The multiaxial ferroelectricity of (DF‐CBA) 2 CuCl 4 enables an excellent surface charge modulating capacity, realizing a high work function regulation of ≈0.7 eV and over 15‐fold current regulation (from 6 to 93 µA) via an electrical poling control. The controllable electrical poling leads to elevated work function difference between the Al electrode and (DF‐CBA) 2 CuCl 4 compared to traditional semiconductors and halide perovskites, which creates a stronger built‐in electric field at the Schottky interface to enhance the electrical output. This TVNG device exhibits outstanding flexibility and long‐term stability (>20 000 cycles) that can endure extreme mechanical deformations, and can also be used in a capsule‐like magnetic suspension device capable of detecting vibration and weights of different objects as well as harvesting energy from human motions and water waves.
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