Dark states enhance the photocell power via phononic dissipation

作者:Zhang Yiteng; Wirthwein Aaron; Alharbi Fahhad H; Engel Gregory S; Kais Sabre*
来源:Physical Chemistry Chemical Physics, 2016, 18(46): 31845-31849.
DOI:10.1039/c6cp06098f

摘要

The high efficiency of the photon-to-charge conversion process found in photosynthetic complexes has inspired researchers to explore a new route for designing artificial photovoltaic materials. Quantum coherence can provide a mean to surpass the Shockley-Quiesser device concept limit by reducing the radiative recombination. Taking inspiration from these new discoveries, we consider a linearly-aligned system as a light-harvesting antennae composed of two-level optical emitters coupled with each other by dipole-dipole interactions. Our simulations show that the certain dark states can enhance the power with the aid of intra-band phononic dissipation. Due to cooperative effects, the output power will be improved when incorporating more emitters in the linear system.

  • 出版日期2016