Nanoscale Photodetector Using 7-Atom Wide Armchair-Edge Graphene Nanoribbons

We demonstrate a nanoscale photoconductive photodetector with seven-atom wide armchair-edge graphene nanoribbons as the active material. The detector responsivity is 0.04 mAW−1 with a dark current below 30 pA under a bias voltage of 1.5 V.