  It has been demonstrated earlier that graphene-like defects on fluorographene
can act as molecules in biomimetic molecular light-harvesting antennae. In
competition with radiative and non-radiative losses, transfer time of
excitations in an antenna measures its performance. We report on the optimal
conditions for excitation energy transfer in artificial antennae built from
selected types of fluorographene defects. The excitation transfer dynamics is
calculated based on the Frenkel exciton model using hierarchical equations of
motion for different values of temperature, system-environment reorganization
energy and bath correlation time to study a possible range of parameters
pertaining to the fluorographene material. We also study possible energy
funnelling in the third dimension for two parallel fluorographene sheets with
defects. We conclude that the strength of system-environment interaction is
more important for the efficient energy funnelling in our proposed material
than a precise control over the structure of artificial antennae.
