Antimonene is an emerging semiconducting two-dimensional (2D) material with various attractive properties, but its applications in optoelectronics have rarely been explored. Herein, we report a highly efficient preparation of few-layered antimonene by a polymer ionic liquid (PIL) assisted liquid-phase exfoliation method, which gives above 20% yield of micrometer sized nanosheets. Stability studies suggested that the presence of water in the solvent significantly accelerated the decomposition of the produced antimonene, while the antimonene dispersed in dry DMF exhibited a very high stability under ambient conditions. For the first time, flexible photodetectors based on a hybrid structure of few layer antimonene nanosheets modified by PIL and CdS quantum dots (QDs) were fabricated, which showed a good responsivity of 10 μA W⁻¹ and on/off ratio of 26.8 under the bias of 1 V. This work demonstrates that PIL assisted liquid-phase exfoliation is a very promising method to achieve highly efficient preparation, preservation, and surface modification of few-layer antimonene, and hence enable the application of antimonene-based 2D materials in optoelectronics.

中文翻译：

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基于锑的柔性光电探测器†

锑是一种新兴的具有各种吸引人的特性的半导体二维（2D）材料，但是很少在光电子学中研究其应用。本文中，我们报道了通过聚合物离子液体（PIL）辅助液相剥离法高效制备几层锑的方法，该方法可提供20％以上的微米级纳米片收率。稳定性研究表明，溶剂中水的存在可显着加速生成的锑的分解，而分散在干燥DMF中的锑在环境条件下表现出非常高的稳定性。首次制造了基于由PIL和CdS量子点（QD）修饰的几层锑纳米片的混合结构的柔性光电探测器，其具有10μAW的良好响应度^-1，在1 V偏压下的开/关比为26.8。这项工作表明，PIL辅助的液相剥离是一种非常有希望的方法，可实现对几层锑的高效制备，保存和表面改性，因此使基于锑的2D材料在光电中的应用成为可能。