Effects of doping graphene on the performance of graphene–silicon hybrid photoconductive detectors

The photoconductive detector based on a graphene–silicon heterostructure retains excellent optoelectrical properties, in which the graphene plays an indispensable role, acting as the carrier transporting channel. Herein, we systematically investigate by simulation and experiment how doping graphene will affect the performance of graphene–silicon hybrid photoconductors. Compared with lightly p-doped graphene devices, the responsivity can be made...