Novel Exfoliation of High-Quality 2H-MoS2 Nanoflakes for Solution-Proc…
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논문명 | Novel Exfoliation of High-Quality 2H-MoS2 Nanoflakes for Solution-Processed Photodetector |
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저자 | Seulgi Kim, Woojin Park, Dohoon Kim, Jiyeon Kang, Jaesoung Lee, Hye Yeon Jang, Sung Ho Song, Byungjin Cho and Dongju Lee |
저널명 | Nanomaterials |
게재년월 | 2020/5/29 |
Vol. pp |
Highly dispersive molybdenum disulfide nanoflakes (MoS2 NFs), without any phase
transition during the exfoliation process, are desirable for full utilization of their semiconductor
properties in practical applications. Here, we demonstrate an innovate approach for fabricating
MoS2 NFs by using hydrazine-assisted ball milling via the synergetic effect of chemical intercalation
and mechanical exfoliation. The NFs obtained have a lateral size of 600–800 nm, a thickness less than
3 nm, and high crystallinity in the 2H semiconducting phase. They form a stable dispersion in
various solvents, which will be helpful for many applications, due to the oxygen functional group.
To investigate production of a two-dimensional (2D) photodetector, 2D semiconducting MoS2,
MoS2–p-Si vertical devices were fabricated, and their optical properties were characterized. The
photodiode exhibited consistent responses with excellent photo-switching characteristics with
wavelengths of 850, 530, and 400 nm