Fig. 3
From: Dynamic Control of High-Range Photoresponsivity in a Graphene Nanoribbon Photodetector
a Photocurrent dependence on the biased source-drain voltage. Photocurrent, background current, and photoresponse current measurements of GRN photodetector in biased of back-gate voltage. The decrease of the photocurrent with an increase of the biased source-drain voltage was contributed to the improvement of the separation efficiency of photo-generated electron-hole pairs. b Photocurrent dependence on the back-gate voltage. The biased back-gate voltage dependence of the photocurrent characteristics in biased of source-drain voltage. The results indicate that the photocurrent could be modulated via biasing the source-drain voltage and gate voltage