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Issue 48, 2017
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Enhanced broadband photoresponse of a self-powered photodetector based on vertically grown SnS layers via the pyro-phototronic effect

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Abstract

Here, we demonstrate the broadband photoresponse from ultraviolet (365 nm) to near-infrared (850 nm) wavelengths from a photodetector based on vertically grown SnS layers. Particularly, the photoinduced current density of the device increased from 100 to 470 μA cm−2 with a wavelength of 760 nm and an intensity of 7 mW cm−2 by utilizing the pyro-phototronic potential. In addition, the photodetector demonstrated ultrafast response rates of ∼12 μs for the rise and ∼55 μs for the decay times over the studied range. Moreover, a good photoresponsivity of 13 mA W−1 and a high photodetectivity of 3 × 1014 Jones at a wavelength of 760 nm with an intensity of 7 mW cm−2 were measured, representing enhancements of 340% and 3960%, respectively, with the pyroelectric potential. This excellent broadband performance was attributed to the photon-induced pyroelectric effect in the vertically grown SnS layers, which also modulated the optoelectronic processes. This novel approach will open a new avenue to design a broadband ultrafast device for advanced optoelectronics.

Graphical abstract: Enhanced broadband photoresponse of a self-powered photodetector based on vertically grown SnS layers via the pyro-phototronic effect

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Publication details

The article was received on 24 Sep 2017, accepted on 09 Nov 2017 and first published on 09 Nov 2017


Article type: Paper
DOI: 10.1039/C7NR07120E
Citation: Nanoscale, 2017,9, 19201-19208
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    Enhanced broadband photoresponse of a self-powered photodetector based on vertically grown SnS layers via the pyro-phototronic effect

    M. Kumar, M. Patel, J. Kim and D. Lim, Nanoscale, 2017, 9, 19201
    DOI: 10.1039/C7NR07120E

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