FAULQUES, E.; WERY, J.; LEFRANT, S.; IVANOV, V. G.; JONUSAUSKAS, Gediminas

doi:10.1103/PhysRevB.65.212202

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FAULQUES, E.
Institut des Matériaux Jean Rouxel [IMN]

WERY, J.
Institut des Matériaux Jean Rouxel [IMN]

LEFRANT, S.
Institut des Matériaux Jean Rouxel [IMN]

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Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2002-06-01, vol. 65, n° 21, p. 4

American Physical Society

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Para-hexaphenyl layers exhibit dramatic changes in their steady-state optical and transient photoluminescence (PL) responses when they are grown with different orientations. For a film in which molecules stand perpendicular to the substrate, radiative recombination of intramolecular Frenkel singlet excitons occurs in less than 2 ps. If the layer is grown with molecules lying parallel to the substrate, short-lived and long-lived PL decay components are found. The former is best reproduced with an annihilation rate equation, characteristic of mobile excitons relaxing in 1 ns while the latter, spectrally redshifted, confirms intermolecular exciton migration.< Leer menos

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Transient photoluminescence of para-hexaphenyl layers

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