TY  - JOUR
A1  - Wolter, Steffen
A1  - Aizezers, Janis
A1  - Fennel, Franziska
A1  - Seidel, Marcus
A1  - Würthner, Frank
A1  - Kühn, Oliver
A1  - Lochbrunner, Stefan
T1  - Size-dependent exciton dynamics in one-dimensional perylene bisimide aggregates
JF  - New Journal of Physics
N2  - 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 degrees 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 fragments consisting of very few monomers. This scenario is also supported by the time-dependent anisotropy deduced from polarization-dependent experiments.
KW  - rotational diffusion
KW  - spectroscopy
KW  - dyes
KW  - annihilation
KW  - migration
KW  - films
Y1  - 2012
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-135190
VL  - 14
IS  - 105027
ER  -