2026-06-29T02:12:31Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/512602024-09-03T16:33:54Zcom_20.500.14352_14col_20.500.14352_15
Low-temperature quenching of one-dimensional localized Frenkel excitons
Malyshev, Andrey
Domínguez-Adame Acosta, Francisco
538.9
Radiative Lifetime
Superradiant Emission
Dependence
Dynamics
Annihilation
Length
Statistics
Band
Física de materiales
© 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.
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.
DGI-MCyT
CAM
MECyD
NATO
Depto. de Física de Materiales
Fac. de Ciencias Físicas
TRUE
pub
2023-06-20T10:48:29Z
2023-06-20T10:48:29Z
2003-04-07
journal article
https://hdl.handle.net/20.500.14352/51260
0009-2614
10.1016/S0009-2614(03)00206-9
eng
MAT2000-0734
Project 07N/0075/2001
Project SAB2000-0103
open access
application/pdf
Elsevier Science BV