A self-powered MXene/InGaN van der Waals heterojunction mini-photodetector for visible light communication

A van der Waals heterojunction-based photodetector has attracted significant interest due to its potential for high-speed visible light communication (VLC) application. Herein, we report a self-powered and high-performance MXene/InGaN van der Waals heterojunction visible light mini-photodetector (mi...

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Veröffentlicht in:Applied physics letters 2023-04, Vol.122 (14)
Hauptverfasser: Kong, Deqi, Lin, Tingting, Chai, Jixing, Zhu, Zihe, Liu, Peixin, Lin, Zhengliang, Lin, Tingjun, Li, Linhao, Chen, Liang, Li, Guoqiang, Wang, Wenliang
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Sprache:eng
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Zusammenfassung:A van der Waals heterojunction-based photodetector has attracted significant interest due to its potential for high-speed visible light communication (VLC) application. Herein, we report a self-powered and high-performance MXene/InGaN van der Waals heterojunction visible light mini-photodetector (mini-PD). The combination of MXene and InGaN creates a Schottky junction that effectively separates the photoinduced electron/hole pairs, resulting in a robust heterojunction structure while enhancing carrier mobility and lifetime. The mini-PD exhibits the responsivity of 6.0 A/W, a specific detection rate of 9 × 1011 Jones, and rise/decay times of 7.1/183.2 μs under 470 nm blue light (36.5 μW/cm2) without bias voltage. The results show that MXene forms a robust type-II band arrangement with InGaN, which converts the optical signal into a large electrical signal and improves the stability of the mini-PD. This work provides a strategy for high-speed VLC without external energy input that has great potential for applications such as energy-efficient communication, sensor networks, and low-sensitivity detection.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0138857