Photodetectors based on two-dimensional MoS2 and its assembled heterostructures

Abstract

Photodetectors are finding various potential applications in sensing and detection, information communication, light-emitting diode, optical modulators, ultrafast laser, etc. Molybdenum disulfide (MoS2) has sparked great interest given its unique crystal phase, flexible preparation, structural stability, and regulable photoelectronic features. Therefore, the MoS2-based photodetector is demonstrated to be an excellent device fabrication platform to explore underlying sensitive detection, broadband optical detection, high-speed response, low-power consumption, two-dimensional integrated circuit, and its synergetic mechanism, which is also proved to be an excellent candidate for next-generation optoelectronics. This review summarizes the structural, optical, and transport features of MoS2. Then the working mechanisms and figures of merit are explored for the MoS2 detector. Further, the detector modulation strategies are introduced in detail about layer-number engineering and chemical doping engineering. Afterward, the recent heterostructure assembling strategies (MoS2/nD, n=0,1,2,3) of detector architectures are classified based on flexible van der Waals assembling. Finally, the future direction of MoS2 photodetectors is discussed, which can be delivered as a feasible guideline in two-dimensional photodetector and integrated circuit fields.