Enhanced photoresponse of monolayer MoS 2 through hybridization with carbon quantum dots as efficient photosensitizer

Two-dimensional (2D) semiconductors have attracted increasing attention due to their potential application in next generation optoelectronic devices. The chemical vapor deposition (CVD) grown monolayer MoS2 is widely investigated as photodetector, but low photoresponsivity and slow response time hinder its practical application. In this work, 0D carbon quantum dots (CQDs) are applied to enhance photodetection performance of 2D MoS2 as efficient and environmental photosensitizer for the first time. The photoresponsivity and detectivity of hybrid photodetector are 377 A W?1 and 1.6??×??1013 Jones under 360?nm illumination, respectively, which are 22 and 7 times higher than pristine MoS2. The enhanced photoresponse of hybrid photodetector arises from synergetic absorption effect and interlayer excitonic transition of CQDs and MoS2 layer. The response speed of hybrid photodetector is four times faster than pristine MoS2 photodetector. Those results pave a way to hybrid 2D?0D MoS2?CQDs application in high performance photodetector.