A strain tunable single-layer MoS2 photodetector

Patricia Gant; Peng Huang; David Pérez de Lara; Dan Guo; Riccardo Frisenda; Andres Castellanos-Gomez

doi:10.1016/j.mattod.2019.04.019

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arXiv · 1902.02802

A strain tunable single-layer MoS2 photodetector

Patricia Gant·Peng Huang·David Pérez de Lara·Dan Guo·Riccardo Frisenda·Andres Castellanos-Gomez

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Abstract

Strain engineering, which aims to tune the bandgap of a semiconductor by the application of strain, has emerged as an interesting way to control the electrical and optical properties of two-dimensional (2D) materials. Apart from the changes in the intrinsic properties of 2D materials, the application of strain can be also used to modify the characteristics of devices based on them. In this work, we study flexible and transparent photodetectors based on single-layer MoS2 under the application of biaxial strain. We find that by controlling the level of strain, we can tune the photoresponsivity (by 2-3 orders of magnitude), the response time (from <80 ms to 1.5 s) and the spectral bandwidth (with a gauge factor of 135 meV/% or 58 nm/%) of the device.

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Patricia Gant, Peng Huang, David Pérez de Lara, Dan Guo, Riccardo Frisenda, Andres Castellanos-Gomez. 2019-02-07. A strain tunable single-layer MoS2 photodetector. https://doi.org/10.1016/j.mattod.2019.04.019

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