Light-harvesting using metallic interdigitated structures modified with Au sputtered graphene

Light-harvesting structures were developed using a coplanar waveguide microfabricated on high-resistivity n-Si, the central electrode consisting of an interdigitated configuration formed by two different metals. Each structure was drop casted using an aqueous dispersion of gold sputtered graphene and was thereafter subjected to I-V investigations under light excitation from UV up to IR domains. Also, the herein described device can act as a wideband photodetector with relatively good responsivity if biased.