Abstract
In this paper, Bi2S3 microflowers have been successfully synthesized via a facile one-pot hydrothermal method and characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray analysis, and X-ray photoelectron spectroscopy. Then the Bi2S3 microflowers were deposited on patterned ITO glass substrates by dip-coating to fabricate photodetectors. The photoresponse properties using Bi2S3 microflowers as a representative system show a significantly enhanced conductivity and the current–voltage characteristic exhibit ca. 1.7 orders of magnitude larger than the dark current. The response and decay times are estimated to be ~227 and 880 ms, respectively, indicating that flower-like Bi2S3 may be an excellent candidate for high-speed and high-sensitivity photoelectrical switches and light-sensitive devices.
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