Low-temperature kinetics of exciton-exciton annihilation of weakly localized one-dimensional Frenkel excitons

Details Low-temperature kinetics of exciton-exciton annihilation of weakly localized one-dimensional Frenkel excitons Low-temperature kinetics of exciton-exciton annihilation of weakly localized one-dimensional Frenkel excitons

2001-03-14

arxiv.org/abs/cond-mat/0103290v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

Published in J. Chem. Phys. 114, 1 April (2001)

Scientific paper

10.1063/1.1352080

We present results of numerical simulations of the kinetics of exciton-exciton annihilation of weakly localized one-dimensional Frenkel excitons at low temperatures. We find that the kinetics is represented by two well-distinguished components: a fast short-time decay and a very slow long-time tail. The former arises from excitons that initially reside in states belonging to the same localization segment of the chain, while the slow component is caused by excitons created on different localization segments. We show that the usual bi-molecular theory fails in the description of the behavior found. We also present a qualitative analytical explanation of the non-exponential behavior observed in both the short- and the long-time decay components.

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