Size-dependent exciton dynamics in one-dimensional perylene bisimide aggregates

  title={Size-dependent exciton dynamics in one-dimensional perylene bisimide aggregates},
  author={Steffen Wolter and Janis Aizezers and Franziska Fennel and Marcus Seidel and Frank W{\"u}rthner and Oliver K{\"u}hn and Stefan Lochbrunner},
  journal={New Journal of Physics},
The size-dependent exciton dynamics of one-dimensional aggregates of substituted perylene bisimides are studied by ultrafast transient absorption spectroscopy and kinetic Monte-Carlo simulations as a function of the excitation density and the temperature in the range of 25–90 °C. For low temperatures, the aggregates can be treated as infinite chains and the dynamics is dominated by diffusion-driven exciton–exciton annihilation. With increasing temperature the aggregates dissociate into small… 
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