Self-surface-oxidation protection of Type-Ⅰ Te/SnS2 heterostructure based photodetectors for high-stability and fast-speed underwater optical communication application

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-01-09 DOI:10.1016/j.cej.2025.159413

Nan Ma, Jinhong Liu, Panpan Shao, Le Jia, Chunhui Lu, Yixuan Zhou, Xinlong Xu

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Abstract

The emerging photoelectrochemical (PEC)-type photodetectors with versatile tunability of photoresponse in aqueous environments have attracted significant attention in the field of underwater optical communication. However, it is still challenging to realize high-stability and fast-speed PEC photodetectors based on two-dimensional semiconductors. Herein, the heterostructure of Te nanorod arrays anchored onto SnS₂ nanosheets has been purposefully designed to optimize the response time, attaining a faster response/recovery time of 83.7 μ s and 113.4 μ s than those of mostly investigated PEC photodetectors based on two-dimensional semiconductors due to the type-I charge transfer pathway. Interestingly, self-surface-oxidation of Te nanorod arrays was verified by in situ electrochemical Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and water splitting experiments, resulting in superior photoresponse stability even after being tested for 18000 s in both neutral and acidic electrolytes. Owing to the fast-response and superior-stability characteristics in the blue-green light window, Te/SnS₂ photodetectors based optical communication system show a large bandwidth of 39.6 kHz and demonstrate a high accuracy in the transmission of ASCII code signals. This result provides an effective strategy to achieve fast response and high stability PEC photodetectors based on type-I heterostructures, promoting the development of high-performance underwater optical communication application.

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用于高稳定、高速水下光通信的ⅠTe/SnS2异质结构光电探测器的自表面氧化保护

新型的光电化学型光电探测器在水环境中具有光响应的可调性，引起了水下光通信领域的广泛关注。然而，实现基于二维半导体的高稳定、高速光电探测器仍然是一个挑战。本文通过对固定在SnS2纳米片上的Te纳米棒阵列异质结构的优化设计，获得了比基于二维半导体的光电探测器更快的响应/恢复时间，分别为83.7 μ s和113.4 μ s，这主要得益于i型电荷转移途径。有趣的是，通过原位电化学拉曼光谱、x射线衍射、x射线光电子能谱和水分解实验验证了Te纳米棒阵列的自表面氧化，即使在中性和酸性电解质中进行18000 s的测试后，也能产生优异的光响应稳定性。基于Te/SnS2光电探测器的光通信系统由于具有蓝绿光窗的快速响应和优越的稳定性，具有39.6 kHz的大带宽和较高的ASCII码信号传输精度。该结果为实现基于i型异质结构的快速响应和高稳定性PEC光电探测器提供了有效的策略，促进了高性能水下光通信应用的发展。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.