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Titolo:
Time-resolved fluorescence studies and Monte Carlo simulations of relaxation dynamics of photoexcitations in a polyfluorene film
Autore:
Meskers, SCJ; Hubner, J; Oestreich, M; Bassler, H;
Indirizzi:
Univ Marburg, Inst Phys Chem Nucl Chem & Macromol Chem, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 omol Chem, D-35032 Marburg, Germany Univ Marburg, Inst Phys, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 Inst Phys, D-35032 Marburg, Germany Univ Hannover, Inst Solid State Phys, D-30167 Hannover, Germany Univ Hannover Hannover Germany D-30167 e Phys, D-30167 Hannover, Germany
Titolo Testata:
CHEMICAL PHYSICS LETTERS
fascicolo: 3-4, volume: 339, anno: 2001,
pagine: 223 - 228
SICI:
0009-2614(20010511)339:3-4<223:TFSAMC>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
SITE-SELECTIVE FLUORESCENCE; EXCITATION TRANSPORT; CONJUGATED POLYMERS; TEMPERATURE; SOLIDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Bassler, H Univ Marburg, Inst Phys Chem Nucl Chem & Macromol Chem, Hans Meerweinstr, D-35032 Marburg, Germany Univ Marburg Hans Meerweinstr Marburg Germany D-35032 Germany
Citazione:
S.C.J. Meskers et al., "Time-resolved fluorescence studies and Monte Carlo simulations of relaxation dynamics of photoexcitations in a polyfluorene film", CHEM P LETT, 339(3-4), 2001, pp. 223-228

Abstract

Time-resolved fluorescence spectroscopy is used to investigate relaxation of electronic excitations in films of a pi -conjugated polyfluorene polymerin the ps time domain. Results are consistent with theoretical predictionsbased on a model for relaxation of the excitations by incoherent hopping between localized states through Forster type energy transfer with a Forsterradius R-0 similar to 20 Angstrom. Excitons created by a photon with an energy <2.92 eV are found to remain immobile during their lifetime. In addition the measurements indicate that for excitation energies >2.94 eV additional relaxation processes, ascribed to ultrafast intrachain vibrational relaxation, are operative. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 10:12:44