Issue 40, 2021

A graphene–Mo2C heterostructure for a highly responsive broadband photodetector

Abstract

Photodetectors based on intrinsic graphene can operate over a broad wavelength range with ultrafast response, but their responsivity is much lower than commercial silicon photodiodes. The combination of graphene with two-dimensional (2D) semiconductors may enhance the light absorption, but there is still a cutoff wavelength originating from the bandgap of semiconductors. Here, we report a highly responsive broadband photodetector based on the heterostructure of graphene and transition metal carbides (TMCs, more specifically Mo2C). The graphene–Mo2C heterostructure enhanced light absorption over a broad wavelength range from ultraviolet to infrared. In addition, there is very small resistance for photoexcited carriers in both graphene and Mo2C. Consequently, photodetectors based on the graphene–Mo2C heterostructure deliver a very high responsivity from visible to infrared telecommunication wavelengths.

Graphical abstract: A graphene–Mo2C heterostructure for a highly responsive broadband photodetector

Supplementary files

Article information

Article type
Paper
Submitted
02 Aug. 2021
Accepted
14 Sept. 2021
First published
15 Sept. 2021

Phys. Chem. Chem. Phys., 2021,23, 23024-23031

A graphene–Mo2C heterostructure for a highly responsive broadband photodetector

X. Bao, T. Sun, Y. Liu, C. Xu, W. Ma, J. Guo, Y. Zheng, S. B. Nanjunda, H. Liu, Z. Huang, S. Li, S. Lin, G. Xing, W. Ren, Q. Bao and H. Shao, Phys. Chem. Chem. Phys., 2021, 23, 23024 DOI: 10.1039/D1CP03536C

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