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Low-temperature quenching of one-dimensional localized Frenkel excitons

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Malyshev, Andrey and Malyshev, V.A. and Domínguez-Adame Acosta, Francisco (2003) Low-temperature quenching of one-dimensional localized Frenkel excitons. Chemical Physics Letters, 371 (3-4). pp. 417-425. ISSN 0009-2614

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Official URL: http://dx.doi.org/10.1016/S0009-2614(03)00206-9




Abstract

We present a theoretical analysis of low-temperature quenching of one-dimensional Frenkel excitons that are localized by moderate on-site (diagonal) uncorrelated disorder. Exciton diffusion is considered as an incoherent hopping over localization segments and is probed by the exciton fluorescence quenching at point traps. The rate equation is used to calculate the temperature dependence of the exciton quenching. The activation temperature of the diffusion is found to be of the order of the width of the exciton absorption band. We demonstrate that the intra-segment scattering is extremely important for the exciton diffusion. We discuss also experimental data on the fast exciton-exciton annihilation in linear molecular aggregates at low temperatures.


Item Type:Article
Additional Information:

© Elsevier Science B.V. All rights reserved.
This work was supported by the DGI-MCyT (Project MAT2000-0734). A. V. M. and F. D. A. acknowledge support from CAM (Project 07N/0075/2001). V. A. M. acknowledges support from MECyD (Project SAB2000-0103) as well as through a NATO Fellowship.

Uncontrolled Keywords:Radiative Lifetime, Superradiant Emission, Dependence, Dynamics, Annihilation, Length, Statistics, Band
Subjects:Sciences > Physics > Materials
ID Code:27497
Deposited On:28 Nov 2014 09:37
Last Modified:28 Nov 2014 09:37

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