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Abstract

In recent years, due to their unique physical, chemical and electronic properties, two-dimensional materials have received more and more researchers’ attention. In particular, the excellent optoelectronic properties and transport properties of two-dimensional materials such as graphene, black phosphorous and transition metal sulfide materials make them have broad application prospects in the field of next-generation optoelectronic devices. In this article, we will mainly introduce the advantages of two-dimensional materials in the field of photodetection, outline the basic principles and parameters of photodetectors, focus on the difference between the grating effect and the traditional photoconductive effect, and the reasons and characteristics of improving optical gain and optical responsivity. Then we review the latest developments and applications of grating local control in photodetectors, and finally summarize the problems faced by the photodetectors of this kind and their prospects for the future.

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Authors and contacts

Corresponding author:Shi Wen-Hua,whshi2007@sinano.ac.cn

Funds:Project supported by the National Key R&D Program of China (Grant No. 2019YFB2005600) and the National Natural Science Foundation of China (Grant No. 51732010)

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Material	Responsivity/(A·W^–1)	Gain	Response time/ms	Detection range/nm	Ref.
Gr/MoSe₂	1.3 × 10⁴	—	22000.0	550	[83]
Gr/MoTe₂	970.82	4.69 × 10⁸	78.0	1064	[86]
Gr/ReS₂	7 × 10⁵	—	30.0	550 nm	[85]
Gr/WS₂	950	—	—	340–680 nm	[84]
Gr/MoS₂	10⁷	10⁸	—	650	[87]
Gr/BP	55.75	—	36.0	655	[82]
Gr/BiI₃	6 × 10⁶	—	8.0	532	[88]
Gr/PbSe	6613	7824	25.0	—	[16]
Gr/Bi₂Te₃	35	83	8.7	532—1550	[78]
Gr/MoS₂	5 × 10⁸	—	—	635	[77]
Gr/Bi₂Se₃	8.18	—	—	near-IR 750—2500	[38]

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Vol. 70, Issue 2 - 2021-01-20

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