ISSN: 2641-9165
Authors: Wang SC and Guo JX*
Graphene, which can detect a broad spectrum from ultraviolet to terahertz, is a promising photodetector material because it offers a broad spectral bandwidth and fast response times. However, the nature of weak light absorption has limited the responsivity of graphene-based photodetectors. Here, we demonstrate a responsivity of up to ∼6.7×103 A/W in a hybrid photodetector that consists of monolayer or bilayer graphene covered with a thin film of colloidal quantum dots. At the same time, benefits from gate-tunability, the device can response from the short-wavelength infrared to the visible, and compatibility with current circuit technologies.
Keywords: Graphene; Quantum dot; Photodetector; Hybrid structure
