Exciton diffusion in energetically disordered organic materials Articles uri icon

publication date

  • November 2009

issue

  • 19

volume

  • 80

International Standard Serial Number (ISSN)

  • 1098-0121

Electronic International Standard Serial Number (EISSN)

  • 1550-235X

abstract

  • We implement a simple, continuous, analytical model for exciton hopping in an energetically disordered molecular landscape. The model is parameterized against atomistic and lattice Monte Carlo simulations based on quantum-chemical calculations. It captures the essential physics of exciton diffusion in disordered media at different temperatures and yields a universal scaling law of the diffusion length with the dimensionless disorder parameter given by the ratio of the energetic disorder width to the thermal energy.

keywords

  • diffusion; charge-transport; thin-films; monte carlo methods; excitons; heterojunction solar-cells; spectral diffusion; energy-transfer; conjugated polymers; monte-carlo; physics; condensed matter; polymer meh-ppv; excitation transport; temperature-dependence