Exciton delocalization and superradiance in tetracene thin films and nanoaggregates

Exciton delocalization and superradiance in tetracene thin films and nanoaggregates

The structure and dynamics of luminescent excitons in tetracene thin films and nanoaggregates are investigated using time-resolved spectroscopy and theoretical calculations. The orientation of tetracene's transition dipole moment along its short molecular axis leads to properties qualitatively...

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Veröffentlicht in:Physical review letters 2004-03, Vol.92 (10), p.107402-107402, Article 107402
Hauptverfasser: Lim, Sang-Hyun, Bjorklund, Thomas G, Spano, Frank C, Bardeen, Christopher J
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container_title Physical review letters
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creator Lim, Sang-Hyun
Bjorklund, Thomas G
Spano, Frank C
Bardeen, Christopher J
description The structure and dynamics of luminescent excitons in tetracene thin films and nanoaggregates are investigated using time-resolved spectroscopy and theoretical calculations. The orientation of tetracene's transition dipole moment along its short molecular axis leads to properties qualitatively different from those observed in aggregates of phenylene-vinylene and thiophene oligomers, despite similar crystal structures. The spectral shape, temperature dependence, and radiative lifetime are consistent with a short-lived superradiant exciton delocalized over approximately 10 tetracene molecules.
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title Exciton delocalization and superradiance in tetracene thin films and nanoaggregates
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