Quantum photovoltaics in wire-dot-wire junctions

Abstract

We developed an effective tight-binding modeling for photovoltaic junctions made of a finite quantum dot chain connected to two semi-infinite quantum wires. We simulated I-V responses under resonant monochromatic illumination in the case of a two-dot junction by means of the Green's function technique. We thus showed a striking property in these dot-wire architectures: the photocurrent increases under bias.