EN
It has been shown that efficiency of a photovoltaic cell can be
enhanced in the presence of intermediate levels in a semiconductor
band gap. However the practical realization of this
concept is difficult due to low absorption by the intermediate
levels. We show that it is possible to significantly increase
photon absorption and generate more power utilizing noise
induced quantum coherence between intermediate electronic
states which is created due to interference among the absorption
pathways. We discuss possible experimental demonstration
of this effect using confined electronic-hole states in self
assembled quantum dots.