Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4729144
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Funding
- MOST [2012CB932702, 2010CB934203, 2009AA03Z315]
- NSF of China [60925003]
- Israel Science Foundation
- ERC [INTIF 226639]
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We propose that a photodetector based on nanotubes formed from layered structure may have a faster response than nanowires or nanobelts. The layered compound tungsten disulfide (WS2) can absorb visible and near-infrared lights. We fabricated photodetectors based on individual WS2 nanotubes. The photodetectors exhibited a remarkable response to excitation with 633 and 785 nm light. The nanotube-based photodetectors exhibited short rise and decay times of a few hundred mu s, high on/off ratio, and high spectral responsivity and external quantum efficiency. Our results imply that WS2 nanotubes are prospective candidates for high-performance nanoscale optoelectronic devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4729144]
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