Picosecond fluorescence decay and exciton dynamics in a new far-red molecular J-aggregate system

Citation
M. Drobizhev et al., Picosecond fluorescence decay and exciton dynamics in a new far-red molecular J-aggregate system, J LUMINESC, 86(2), 2000, pp. 107-116
Citations number
36
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF LUMINESCENCE
ISSN journal
00222313 → ACNP
Volume
86
Issue
2
Year of publication
2000
Pages
107 - 116
Database
ISI
SICI code
0022-2313(200003)86:2<107:PFDAED>2.0.ZU;2-A
Abstract
We present and characterize a new J-aggregate-type nanostructure formed by self-assembling of 3,3'-diethylthiadicarbocyanine iodide molecules in a sol ution. We measure picosecond kinetics of fluorescence from the lowest excit on band, lying in the far-red wavelength range around 810-830 nm. At temper atures 4-300 K we observe a non-exponential fluorescence decay and show tha t this is a result of exciton-exciton annihilation in a small exciton domai n regime. We also measure the temperature dependence of single-exciton radi ative lifetime and give a consistent description of it in terms of a self-t rapping of exciton in a discrete one-dimensional chain. (C) 2000 Elsevier S cience B.V. All rights reserved.