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UV-activated single-layer WSe2 for highly sensitive NO2 detection

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摘要

过渡金属二硫化物(TMDs)材料由于其在室温下工作的能力,在气体传感器中受到越来越多的关注。然而,低响应、高检测限和恢复迟缓等瓶颈极大地阻碍了它们在实际传感器中的应用。在这项工作中,我们提出了一种基于化学气相沉积法(CVD)生长的单层WSe2的高灵敏度NO2传感器。在紫外(UV)光激活下,该传感器显示出对NO2的显著响应,这超过了先前报道的基于单层和少层WSe2的传感器。在紫外线照射下,传感器在室温(25 ℃)下对1×10−6 NO2的响应高达9,与没有紫外线激活的传感器相比,显示出4倍的增强。该传感器在紫外光照射下,在0.5×10−6−20.0×10−6 NO2的浓度范围内表现出良好的线性响应。此外,该传感器还显示出对NO2的良好选择性、可行的重复性和稳定性(4周)以及快速响应恢复(10×10−6 NO2,53 s/90 s),为可靠的NO2传感器提供了相当大的潜力。

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (Nos. 51972182 and 61971252), Shandong Provincial Natural Science Foundation (No. ZR2020JQ27) and the Youth Innovation Team Project of Shandong Provincial Education Department (No. 2020KJN015).

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Authors and Affiliations

  1. College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao, 266071, China

    Guo-Cai Lu, Wei Zheng, Jia-Yue Xie, Zi-Shuo Li, Cheng-Ming Lou, Guang-Lu Lei & Jun Zhang

  2. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin, 300071, China

    Xiang-Hong Liu

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  1. Guo-Cai Lu
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Correspondence to Xiang-Hong Liu.

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Lu, GC., Liu, XH., Zheng, W. et al. UV-activated single-layer WSe2 for highly sensitive NO2 detection. Rare Met. 41, 1520–1528 (2022). https://doi.org/10.1007/s12598-021-01899-7

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