  Artificially reproducing the biological light reactions responsible for the
remarkably efficient photon-to-charge conversion in photosynthetic complexes
represents a new direction for the future development of photovoltaic devices.
Here, we develop such a paradigm and present a model photocell based on the
nanoscale architecture of photosynthetic reaction centres that explicitly
harnesses the quantum mechanical effects recently discovered in photosynthetic
complexes. Quantum interference of photon absorption/emission induced by the
dipole-dipole interaction between molecular excited states guarantees an
enhanced light-to-current conversion and power generation for a wide range of
realistic parameters, opening a promising new route for designing artificial
light-harvesting devices inspired by biological photosynthesis and quantum
technologies.
