AI Article Synopsis
- High-quality Bi2 S3 nanowires are synthesized using chemical vapor deposition to study their photoresponsive and field-effect properties.
- Among the electrode pairs tested (Au-Au, Ag-Ag, and Au-Ag), the asymmetric Au-Ag setup exhibits the highest mobility due to its stepwise band alignment.
- The light exposure leads to a significant sevenfold reduction in the on/off ratio, attributed to an increase in the off-state current (Ioff) due to photoexcited charge carriers.
Article Abstract
High-quality Bi2 S3 nanowires are synthesized by chemical vapor deposition and their intrinsic photoresponsive and field-effect characteristics are explored in detail. Among the studied Au-Au, Ag-Ag, and Au-Ag electrode pairs, the device with stepwise band alignment of asymmetric Au-Ag electrodes has the highest mobility. Furthermore, it is shown that light can cause a sevenfold decrease of the on/off ratio. This can be explained by the photoexcited charge carriers that are more beneficial to the increase of Ioff than Ion . The photoresponsive properties of the asymmetric Au-Ag electrode devices were also explored, and the results show a photoconductive gain of seven with a rise time of 2.9 s and a decay time of 1.6 s.
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| http://dx.doi.org/10.1002/cphc.201402594 | DOI Listing |
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