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Anisotropic photoresponse of layered 2D SnS-based near infrared photodetectors

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Abstract

We fabricated near-infrared (NIR) photodetectors with two-dimensional (2D) single crystal orthorhombic SnS nanosheets. The as-fabricated devices exhibited an excellent photoresponsivity of 365 A W−1 under 808 nm light illumination with an excellent external quantum efficiency of 5.70 × 104, which can be further increased to 635 A W−1 and 9.92 × 104 by Au nanoparticle decoration. An anisotropic photoresponse was found for the SnS-based NIR photodetectors and the conductivity and photoconductivity along the zigzag direction are much greater than those along the armchair direction. Treated with oxygen plasma, the effects of defects on the anisotropic photoresponse were further investigated. These results provide a deeper understanding of the electrical and photoelectrical properties of 2D SnS nanosheet based devices.

Graphical abstract: Anisotropic photoresponse of layered 2D SnS-based near infrared photodetectors

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Publication details

The article was received on 27 Jun 2017, accepted on 18 Jul 2017 and first published on 20 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02865B
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Anisotropic photoresponse of layered 2D SnS-based near infrared photodetectors

    Z. Zhang, J. Yang, K. Zhang, S. Chen, F. Mei and G. Shen, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC02865B

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