Issue 40, 2024

2D MoS2 photovoltaic detectors with a switchable mode

Abstract

Photodetectors based on two-dimensional (2D) materials have demonstrated their advantages of low-cost, high-performance, small-size, flexibility and large-scale manufacture. In this work, 2D MoS2-based photovoltaic detectors with a switchable mode have been achieved through a Schottky and lateral PN homojunction. By applying different bias voltages, the photodetection mode can be switched between the photodiode and photoconductor, combining the advantageous features of both modes in one device. In the photodiode mode, a significant rectifying and photovoltaic behavior can be achieved and tuned by the gate voltages, achieving a fast photo-response speed of ∼10 ms. In the photoconductor mode, the photoconductive effect can lead to a photo-gain mechanism, a high responsivity up to 103 A W−1 and a high detectivity of 4.1 × 1012 Jones in the Schottky device. This work develops a MoS2 photodetector based on a Schottky and PN homojunction using a facile method, and the switchable operation mode endows our device with the capability of customized photodetection applications for different needs.

Graphical abstract: 2D MoS2 photovoltaic detectors with a switchable mode

Article information

Article type
Paper
Submitted
31 jul 2024
Accepted
30 aug 2024
First published
30 aug 2024

J. Mater. Chem. C, 2024,12, 16343-16348

2D MoS2 photovoltaic detectors with a switchable mode

Y. Yang, Z. Li, H. Dong, X. Zhang, F. Wu and N. Huo, J. Mater. Chem. C, 2024, 12, 16343 DOI: 10.1039/D4TC03280B

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