Ultrafast exciton dynamics in a polymeric heterostructure based on thienylene-phenylene sequences

Autor:	W. Porzio, S. Destri, V. Pruneri, Mauro Nisoli, S. De Silvestri, Riccardo Tubino
Rok vydání:	1995
Předmět:	Materials science Condensed matter physics Band gap Exciton General Physics and Astronomy Heterojunction Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Power law Phenylene Chemical physics Femtosecond Relaxation (physics) Physical and Theoretical Chemistry Biexciton
Zdroj:	Scopus-Elsevier Chemical physics letters 234 (1995): 348–353. doi:10.1016/0009-2614(95)00060-H info:cnr-pdr/source/autori:De Silvestri S., Nisoli M., Pruneri V., Destri S., Porzio W., Tubino R./titolo:ULTRAFAST EXCITON DYNAMICS IN A POLYMERIC HETEROSTRUCTURE BASED ON THIENYLENE-PHENYLENE SEQUENCES/doi:10.1016%2F0009-2614(95)00060-H/rivista:Chemical physics letters (Print)/anno:1995/pagina_da:348/pagina_a:353/intervallo_pagine:348–353/volume:234
ISSN:	0009-2614
Popis:	We have investigated by femtosecond pump-and-probe measurements the exciton dynamics in a novel conjugated polymeric heterostructure consisting of regularly alternated thienylenic and phenylenic segments. A fast initial relaxation followed by a power law decay has been observed. The initial part of the decay is consistent with the self-trapped exciton relaxation process. The power law decay has been interpreted in terms of the modulation of the energy band gap along the polymeric chains. We have also studied the optical properties of a thienylene-based oligomer with the same well-barrier-well structure of the polymer in order to investigate the role of disorder on the polymer relaxation dynamics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::296085ca222643f9e8ca46c6efb278b7 https://doi.org/10.1016/0009-2614(95)00060-h Zobrazit plný text záznamu Full Text from ScienceDirect