Abstract
Tin sulfide (SnS2) has attracted growing attention due to its environmental friendliness, tunable band gap and potential applications for high-sensitivity photodetectors. However, the low responsivity and slow response speed severely hinder its further applications. In this work, SnS2 nanowalls have been successfully fabricated on FTO substrates by a facile hydrothermal approach. The prepared SnS2 nanowalls were used as a photoanode material for photoelectrochemical (PEC)-type photodetectors. The SnS2 based PEC-type photodetectors exhibit excellent photocurrent density (39.06 μA cm-2), responsivity (1460 μA W-1), long-term cycling stability and self-powered behavior. The responsivity of the detector is higher than that of most reported SnS2 based PEC-type photodetectors and even some SnS2 based photoconductive photodetectors. The high responsivity and self-powered behavior enable the extended potential applications of SnS2 in PEC-type photodetectors.
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