La plateforme OSKAR Bordeaux évolue pour rejoindre l'archive ouverte HAL. Retrouvez tous vos dépôts sur le nouveau portail HAL UB : https://u-bordeaux.hal.science/.
Pour toute aide ou information, contactez-nous info@oskar-bordeaux.fr
Transient photoluminescence of para-hexaphenyl layers
Idioma
en
Article de revue
Este ítem está publicado en
Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2002-06-01, vol. 65, n° 21, p. 4
American Physical Society
Resumen en inglés
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 ...Leer más >
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
Orígen
Importado de HalCentros de investigación