Delocalized Quantum States Enhance Photocell Efficiency

TL;DR

This paper proposes a three-dipole quantum system that leverages coherence to significantly boost photocell efficiency, inspired by photosynthetic processes, with a predicted 49.5% increase in photocurrent.

Contribution

It introduces a novel three-dipole model exploiting quantum coherence to enhance photovoltaic efficiency beyond traditional designs.

Findings

Photocell efficiency is greatly enhanced by quantum coherence.

Predicted photocurrent increase of about 49.5% with coherent coupling.

Suggests new design strategies for photosynthesis-inspired photovoltaic devices.

Abstract

The high quantum efficiency of photosynthetic complexes has inspired researchers to explore new routes to utilize this process for photovoltaic devices. Quantum coherence has been demonstrated to play a crucial role within this process. Herein, we propose a three-dipole system as a model of a new photocell type which exploits the coherence among its three dipoles. We have proved that the efficiency of such a photocell is greatly enhanced by quantum coherence. We have also predicted that the photocurrents can be enhanced by about 49.5 % in such a coherent coupled dipole system compared with the uncoupled dipoles. These results suggest a promising novel design aspect of photosynthesis-mimicking photovoltaic devices.