Zhou Jianxian, Chen Long, Wu Jiajun, Lu Zecheng, Liu Fan, Chen Xuedan, Xue Pan, Li Chunsheng, Wei Lei, Wu Guan, Li Qingwen, Zhang Qichong
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China.
University of Science and Technology of China, Hefei 230026, China.
Nano Lett. 2023 Dec 13;23(23):11297-11306. doi: 10.1021/acs.nanolett.3c03851. Epub 2023 Nov 14.
Fiber-shaped photodetectors (FPDs) with multidirectional light absorption properties offer exciting opportunities for intelligent optoelectronic textiles. However, achieving FPDs capable of working in ampule environments, especially with high sensitivity, remains a fundamental challenge. Here, quasi-solid-state twisted-fiber photoelectrochemical photodetectors (FPPDs) consisting of photoanode, gel electrolyte, and counter electrode are successfully assembled. In situ decorated n-type one-dimensional (1D) TiO nanowire arrays with 2D Ni-Fe metal-organic framework (NiFeMOF) nanosheets serve as hierarchical heterojunction photoanodes, thereby optimizing carrier transfer dynamics at the photoanode/electrolyte interface. As expected, the resulting self-powered FPPD exhibits 88.6 mA W high responsiveness and a < 30 ms fast response time. Significantly, our FPPD can operate in both terrestrial and aquatic environments thanks to its intrinsic ionic properties, making it a versatile tool for detecting ultraviolet light on land and facilitating optical communication underwater. These high-sensitivity self-powered FPPDs with hierarchical heterojunction photoelectrodes hold promise for the development of wearable amphibious optoelectronic textiles.
具有多向光吸收特性的纤维状光电探测器（FPD）为智能光电纺织品带来了令人兴奋的机遇。然而，实现能够在安瓿环境中工作，尤其是具有高灵敏度的FPD，仍然是一项根本性挑战。在此，成功组装了由光阳极、凝胶电解质和对电极组成的准固态扭曲纤维光电化学光电探测器（FPPD）。原位用二维镍铁金属有机框架（NiFeMOF）纳米片修饰的n型一维（1D）TiO纳米线阵列用作分级异质结光阳极，从而优化光阳极/电解质界面处的载流子转移动力学。正如预期的那样，所得自供电FPPD表现出88.6 mA W 的高响应度和<30 ms的快速响应时间。值得注意的是，由于其固有的离子特性，我们的FPPD可在陆地和水生环境中运行，使其成为一种用于陆地检测紫外线和促进水下光通信的通用工具。这些具有分级异质结光电极的高灵敏度自供电FPPD为可穿戴两栖光电纺织品的发展带来了希望。
