Application and prospect of 2D materials in photodetectors

With the continuous development of modern information technology, higher requirements are put forward for photoelectric detection technology. Two-dimensional (2D) materials have excellent optical, electrical and mechanical properties, and easy to process and integrate, which is expected to make up for the shortcomings of traditional devices. 2D materials, which cover material systems ranging from metals, semiconductors to insulators, are one of the main material choices for new photodetectors. In recent years, great progress has been made in the preparation of 2D photoelectricity device applications. In this paper, the latest research progress of 2D materials photodetectors is summarized, including the unique physical and chemical properties of 2D materials and the key parameters of photodetector. The research progress of photodetectors based on graphene, black phosphorus and transition metal dichalcogenides is highlighted. Finally, we give an outlook on the challenges of realizing high-performance photodetectors.