Journal
NANOSCALE RESEARCH LETTERS
Volume 10, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-015-0993-1
Keywords
Bi2S3; 3D; Photoresponse; Morphology; Surfactants; KCl
Funding
- National Basic Research Program of China [2012CB619302, 2010CB923204]
- Science and Technology Bureau of Wuhan City [2014010101010006]
- Natural Science Foundation of Hubei Province [2011CDA81]
- Science Foundation from Hubei Provincial Department of Education [D20131001]
- National Natural Science Foundation of China [10990103, 51002058, 61274010]
- Science and technology project of Zhejiang Province [2012C33057]
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A solvothermal method has been employed to synthesize bismuth sulfide (Bi2S3) with three-dimensional (3D) hierarchical architectures. The influences of different types of surfactants and Cl-species on the size and morphology were investigated. A possible formation mechanism was also proposed on the basis of time-dependent experiments. The photoresponse properties show that the conductivity of Bi2S3 micro-flowers is significantly enhanced and the photocurrent is approximately two orders of magnitude larger than the dark current. The response and decay times are estimated to be 142 and 151 ms, respectively. It is expected that hierarchical architectures Bi2S3 may provide a new pathway to develop advanced nanomaterial for high-speed and high-sensitivity photoelectrical switches and photodetecting devices.
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