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

Zidong Zhang; Juehan Yang; Kai Zhang; Shuai Chen; Fuhong Mei; Guozhen Shen

doi:10.1039/c7tc02865b

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

Zidong Zhang, Juehan Yang, Kai Zhang, Shuai Chen, Fuhong Mei^*, Guozhen Shen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

95 Citations (Scopus)

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.

Original language	English
Pages (from-to)	11288-11293
Number of pages	6
Journal	Journal of Materials Chemistry C
Volume	5
Issue number	43
DOIs	https://doi.org/10.1039/c7tc02865b
Publication status	Published - 2017
Externally published	Yes

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title = "Anisotropic photoresponse of layered 2D SnS-based near infrared photodetectors",

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.",

author = "Zidong Zhang and Juehan Yang and Kai Zhang and Shuai Chen and Fuhong Mei and Guozhen Shen",

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T1 - Anisotropic photoresponse of layered 2D SnS-based near infrared photodetectors

AU - Zhang, Zidong

AU - Yang, Juehan

AU - Zhang, Kai

AU - Chen, Shuai

AU - Mei, Fuhong

AU - Shen, Guozhen

PY - 2017

Y1 - 2017

N2 - 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.

AB - 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.

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DO - 10.1039/c7tc02865b

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JO - Journal of Materials Chemistry C

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

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