Improving the field-effect performance of Bi2S3 single nanowires by an asymmetric device fabrication

Fangyuan Lu; Renxiong Li; Yan Li; Nengjie Huo; Juehan Yang; Yongtao Li; Bo Li; Shengxue Yang; Zhongming Wei; Jingbo Li

doi:10.1002/cphc.201402594

Improving the field-effect performance of Bi2S3 single nanowires by an asymmetric device fabrication

Fangyuan Lu
, Renxiong Li
, Yan Li
, Nengjie Huo
, Juehan Yang
, Yongtao Li
, Bo Li
, Shengxue Yang
, Zhongming Wei
, Jingbo Li

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

High-quality Bi₂S₃ 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 I_off than I_on. 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.

Original language	English
Pages (from-to)	99-103
Number of pages	5
Journal	ChemPhysChem
Volume	16
Issue number	1
DOIs	https://doi.org/10.1002/cphc.201402594
State	Published - 2 Jan 2015
Externally published	Yes

Keywords

Asymmetric electrodes
Band alignment
Bis nanowires
Carrier mobility
Photoresponse

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10.1002/cphc.201402594

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abstract = "High-quality Bi2S3 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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doi = "10.1002/cphc.201402594",

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T1 - Improving the field-effect performance of Bi2S3 single nanowires by an asymmetric device fabrication

AU - Lu, Fangyuan

AU - Li, Renxiong

AU - Li, Yan

AU - Huo, Nengjie

AU - Yang, Juehan

AU - Li, Yongtao

AU - Li, Bo

AU - Yang, Shengxue

AU - Wei, Zhongming

AU - Li, Jingbo

PY - 2015/1/2

Y1 - 2015/1/2

N2 - High-quality Bi2S3 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.

AB - High-quality Bi2S3 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.

KW - Asymmetric electrodes

KW - Band alignment

KW - Bis nanowires

KW - Carrier mobility

KW - Photoresponse

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Improving the field-effect performance of Bi2S3 single nanowires by an asymmetric device fabrication

Abstract

Keywords

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