Weak UV-Stimulated Synaptic Transistors Based on Precise Tuning of Gallium-Doped Indium Zinc Oxide Nanofibers

IF 17.2 1区工程技术 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Advanced Fiber Materials Pub Date : 2023-08-01 DOI:10.1007/s42765-023-00318-z

Yuxiao Wang, Ruifu Zhou, Haofei Cong, Guangshou Chen, Yanyan Ma, Shuwen Xin, Dalong Ge, Yuanbin Qin, Seeram Ramakrishna, Xuhai Liu, Fengyun Wang

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引用次数: 1

Abstract

In this work, a light-stimulated artificial synaptic transistor based on one-dimensional nanofibers of gallium-doped indium zinc oxides (IGZO) is demonstrated. The introduction of gallium into the nanofiber lattice can effectively alter the morphology and crystallinity, leading to a wider regulatory range of synaptic plasticity. The fabricated IGZO synaptic transistor with the optimal gallium concentration and low surface defects exhibits a superior photoresponsivity of 4300 A·W⁻¹ and excellent photosensitivity, which can detect light signals as weak as 0.03 mW·cm⁻². In particular, the paired-pulse facilitation index reaches up to 252% with over 2 h of enhanced memory retention exhibiting the long-term potentiation. Furthermore, the simulated image contrast and image recognition accuracy based on the newly designed IGZO synaptic transistors are successfully enhanced. These remarkable behaviors of light-stimulated synapses utilizing low-cost electrospun nanofibers have potential for ultraweak light applications in future artificial systems.

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基于掺镓铟氧化锌纳米纤维精确调谐的弱紫外刺激突触晶体管

在这项工作中，展示了一种基于一维掺镓铟锌氧化物纳米纤维的光刺激人工突触晶体管。在纳米纤维晶格中引入镓可以有效地改变其形态和结晶度，从而扩大突触可塑性的调节范围。制备的IGZO突触晶体管具有最佳的镓浓度和低表面缺陷，具有4300 a·W−1的优异光响应性和优异的光敏性，可检测弱至0.03 mW·cm−2的光信号。特别是，配对脉冲促进指数高达252%，超过2小时的记忆保持增强表现出长时程增强。此外，还成功地提高了基于IGZO突触晶体管的模拟图像对比度和图像识别精度。利用低成本的静电纺纳米纤维，光刺激突触的这些显著行为在未来的人工系统中具有超弱光应用的潜力。图形抽象

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来源期刊

Advanced Fiber Materials Multiple-

CiteScore

18.70

自引率

11.20%

发文量

109

期刊介绍： Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al. Publishing on fiber or fiber-related materials, technology, engineering and application.