How to characterize figures of merit of two-dimensional photodetectors

Fang Wang, Tao Zhang, Runzhang Xie (), Zhen Wang () and Weida Hu ()
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Fang Wang: Chinese Academy of Sciences
Tao Zhang: Chinese Academy of Sciences
Runzhang Xie: Chinese Academy of Sciences
Zhen Wang: Chinese Academy of Sciences
Weida Hu: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Photodetectors based on two-dimensional (2D) materials have been the focus of intensive research and development over the past decade. However, a gap has long persisted between fundamental research and mature applications. One of the main reasons behind this gap has been the lack of a practical and unified approach for the characterization of their figures of merit, which should be compatible with the traditional performance evaluation system of photodetectors. This is essential to determine the degree of compatibility of laboratory prototypes with industrial technologies. Here we propose general guidelines for the characterization of the figures of merit of 2D photodetectors and analyze common situations when the specific detectivity, responsivity, dark current, and speed can be misestimated. Our guidelines should help improve the standardization and industrial compatibility of 2D photodetectors.

Date: 2023
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DOI: 10.1038/s41467-023-37635-1

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