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Building one-dimensional Bi2S3 nanorods as enhanced photoresponding materials for photodetectors |
Taotao DING1,Yu TIAN2,Jiangnan DAI1,Changqing CHEN1,*() |
1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China 2. School of Physics and Information Engineering, Jianghan University, Wuhan 430056, China |
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Abstract In this paper, Bi2S3 nanorods were successfully synthesized via a facile one-pot hydrothermal method and characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Then the Bi2S3 nanorods were deposited on Au interdigital electrodes by dip-coating to fabricate photodetectors. The photoresponse properties using Bi2S3 nanorods as a representative system showed a significantly enhanced conductivity and the current-voltage (I-V) characteristic exhibited about ca. 2 orders of magnitude larger than the dark current. The response and decay time was estimated to be ~371.66 and 386 ms, respectively, indicating Bi2S3 may be an excellent candidate for high speed and high-sensitivity photoelectrical switches and light sensitive devices.
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Keywords
Bi2S3
nanorods
photoresponse property
photodetector
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Corresponding Author(s):
Changqing CHEN
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Just Accepted Date: 04 August 2015
Online First Date: 21 August 2015
Issue Date: 18 September 2015
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