High-responsivity photodetector based on scrolling monolayer MoS₂hybridized with carbon quantum dots

The monolayer MoS₂based photodetectors have been widely investigated, which show limited photoelectric performances due to its low light absorption and uncontrollable adsorbates. In this paper, we present a MoS₂-based hybrid nanoscrolls device, in which one-dimensional nanoscrollsof MoS₂is hybridized with carbon quantum dots (CQDs). This device architecture effectively enhanced the photodetection performance. The photoresponsivity and detectivity values of MoS₂/CQDs-NS photodetectors are respectively 1793 A W^-1and 5.97 × 10¹²Jones, which are 830-fold and 268-fold higher than those of pristine MoS₂under 300 nm illumination atV_ds = 5 V. This research indicates a significant progress in fabricating high-performance MoS₂photodetectors.