Tunable Ambipolar Polarization-Sensitive Photodetectors Based on High-Anisotropy ReSe2 Nanosheets
Article
Article Title | Tunable Ambipolar Polarization-Sensitive Photodetectors Based on High-Anisotropy ReSe2 Nanosheets |
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ERA Journal ID | 35029 |
Article Category | Article |
Authors | Zhang, Enze (Author), Wang, Peng (Author), Li, Zhe (Author), Wang, Haifeng (Author), Song, Chaoyu (Author), Huang, Ce (Author), Chen, Zhi-Gang (Author), Yang, Lei (Author), Zhang, Kaitai (Author), Lu, Shiheng (Author), Wang, Weiyi (Author), Liu, Shanshan (Author), Fang, Hehai (Author), Zhou, Xiaohao (Author), Yan, Hugen (Author), Zou, Jin (Author), Wan, Xiangang (Author), Zhou, Peng (Author), Hu, Weida (Author) and Xiu, Faxian (Author) |
Journal Title | ACS Nano |
Journal Citation | 10 (8), pp. 8067-8077 |
Number of Pages | 11 |
Year | 2016 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 1936-0851 |
1936-086X | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsnano.6b04165 |
Web Address (URL) | http://pubs.acs.org/doi/abs/10.1021/acsnano.6b04165 |
Abstract | Atomically thin 2D-layered transition-metal dichalcogenides have been studied extensively in recent years because of their intriguing physical properties and promising applications in nanoelectronic devices. Among them, ReSe2 is an emerging material that exhibits a stable distorted 1T phase and strong in-plane anisotropy due to its reduced crystal symmetry. Here, the anisotropic nature of ReSe2 is revealed by Raman spectroscopy under linearly polarized excitations in which different vibration modes exhibit pronounced periodic variations in intensity. Utilizing high-quality ReSe2 nanosheets, top-gate ReSe2 field-effect transistors were built that show an excellent on/off current ratio exceeding 107 and a well-developed current saturation in the current-voltage characteristics at room temperature. Importantly, the successful synthesis of ReSe2 directly onto hexagonal boron nitride substrates has effectively improved the electron motility over 500 times and the hole mobility over 100 times at low temperatures. Strikingly, corroborating with our density-functional calculations, the ReSe2-based photodetectors exhibit a polarization-sensitive photoresponsivity due to the intrinsic linear dichroism originated from high in-plane optical anisotropy. With a back-gate voltage, the linear dichroism photodetection can be unambiguously tuned both in the electron and hole regime. The appealing physical properties demonstrated in this study clearly identify ReSe2 as a highly anisotropic 2D material for exotic electronic and optoelectronic applications. |
Keywords | Anisotropy; Linear dichroism photodetection; ReSe2; Ambipolar; Hexagonal boron nitride; Layered transition metal dichalcogenides; Nanoelectronic devices; Optoelectronic applications; Photo detection; Polarization sensitive; ReSe2; Metallurgy and Metallography; Semiconducting Materials; Semiconductor Devices and Integrated Circuits; Computer Circuits; Light and Optics; Nanotechnology; Physical Properties of Gases, Liquids and Solids; Atomic and Molecular Physics; Solid State Physics; Crystal Lattice |
ANZSRC Field of Research 2020 | 401804. Nanoelectronics |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Fudan University, China |
Chinese Academy of Sciences, China | |
Nanjing University, China | |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4147/tunable-ambipolar-polarization-sensitive-photodetectors-based-on-high-anisotropy-rese2-nanosheets
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