Mirror particle effects in kinetic Monte Carlo simulations including Coulomb interaction with periodic boundaries

We investigate the photoluminescence of low-dimensional disordered materials, as used e.g. in solar cells, by performing kinetic Monte-Carlo simulations of exciton hopping with periodic boundary conditions. In order to perform numerically efficient calculations, the box length L
box
should be as small as possible while maintaining physically meaningful results during the presence of exciton-exciton-interaction. Exciton-exciton interaction can be approximated by attractive dipole-dipole-interaction in the limit of long distances. We study the convergence of a direct summation approach instead of the Ewald summation technique.