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

Drobizhev, M.; Sigel, C.; Rebane, A. (2000). Picosecond fluorescence decay and exciton dynamics in a new far-red molecular J-aggregate system. Journal of Luminescence, 86 (2), 107−116.
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Drobizhev, M.; Sigel, C.; Rebane, A.
  • Inglise
J. Lumines.
Journal of Luminescence
1872-7883; 0022-2313
86
2
2000
107116
Ilmunud
1.1. Teadusartiklid, mis on kajastatud Web of Science andmebaasides Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index ja/või andmebaasis Scopus (v.a. kogumikud)
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English, We present and characterize a new J-aggregate-type nanostructure formed by self-assembling of 3,3'-diethylthiadicarbocyanine iodide molecules in a solution. We measure picosecond kinetics of fluorescence from the lowest exciton band, lying in the far-red wavelength range around 810-830 nm. At temperatures 4-300 K we observe a non-exponential fluorescence decay and show that this is a result of exciton-exciton annihilation in a small exciton domain regime. We also measure the temperature dependence of single-exciton radiative lifetime and give a consistent description of it in terms of a self-trapping of exciton in a discrete one-dimensional chain. (C) 2000 Elsevier Science B.V. All rights reserved.
J-aggregates; infrared absorption; exciton relaxation dynamics;