Fig. 1: Operational principle and the fabrication process of the photodetector.
From: Self-driven WSe2 photodetectors enabled with asymmetrical van der Waals contact interfaces
Band alignment of the Metal–WSe2–Metal structures with a Au as the two contact electrodes and b Au and multilayer graphene as the two contact electrodes, respectively, where the asymmetrical Schottky barriers at the two sides enabling a non-zero short-circuit current under light illumination. c Three-dimensional schematic of the process flow to fabricate the graphene–WSe2–Au photodetector.
