Hybrid 2D-0D MoS2-PbS quantum dot photodetectors

Abstract

(Graph Presented). A hybrid phototransistor consisting of colloidal PbS quantum dots and few layers of MoS2 (≥2 layers) is demonstrated. The hybrid benefits from tailored light absorption in the quantum dots throughout the visible/near infrared region, efficient charge-carrier separation at the p-n interface, and fast carrier transport through the MoS2 channel. It shows responsivity of up to 106 A W-1 and backgate-dependent sensitivity.