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Massuyeau, F., Faulques, E., Lefrant, S., Majdoub, M., Ghedira, M., Alimi, K. & Wery, J. (2011) Photoluminescence properties of new PPV derivatives. J. Lumines. 131 1541–1544.
Added by: Laurent Cournède (2016-03-10 21:32:20) |
| Type de référence: Article DOI: 10.1016/j.jlumin.2011.02.010 Numéro d'identification (ISBN etc.): 0022-2313 Clé BibTeX: Massuyeau2011 Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: c1-4ppv-ether, conjugated polymers, copolymers, diodes, ether, Excitons, films, light, photoluminescence, Poly-phenylene-vinylene derivatives, poly(para-phenylene vinylene), Polymer conformation, temperature, Time-resolved spectroscopy Créateurs: Alimi, Faulques, Ghedira, Lefrant, Majdoub, Massuyeau, Wery Collection: J. Lumines. |
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| Résumé |
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We investigate the emission properties of two copolymers by steady-state and time-resolved photoluminescence measurements. The copolymers are derived from poly-phenylene-vinylene (PPV) to which a non-conjugated ether group was added. The difference between the two copolymers is the group attached on the phenyl rings. Their fluorescence spectra present bathochromic and hypsochromic shift with respect to pristine PPV, well explained by their chemical properties. Additionally, we observe an enhancement of their quantum yield compared to that of PPV. Photoluminescence decays are bi-exponential for the two copolymers and their lifetime are longer than that of PPV. Finally, differences in emission properties between the two copolymers put in evidence the importance of their conformational structures in the luminescence processes. (C) 2011 Elsevier B.V. All rights reserved.
Added by: Laurent Cournède |