Delocalized quantum states enhance photocell efficiency

作者：Zhang Yiteng; Oh Sangchul; Alharbi Fahhad H; Engel Gregory S; Kais Sabre^*

来源：Physical Chemistry Chemical Physics, 2015, 17(8): 5743-5750.

DOI：10.1039/c4cp05310a

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 in 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.

• 出版日期2015