Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Optical signature of delocalized polarons in conjugated polymers
Autore:
Beljonne, D; Cornil, J; Sirringhaus, H; Brown, PJ; Shkunov, M; Friend, RH; Bredas, JL;
Indirizzi:
Univ Mons, Lab Chem Novel Mat, Ctr Res Mol Elect & Photon, B-7000 Mons, Belgium Univ Mons Mons Belgium B-7000 s Mol Elect & Photon, B-7000 Mons, Belgium Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England Univ Cambridge Cambridge England CB3 0HE Lab, Cambridge CB3 0HE, England Univ Arizona, Dept Chem, Tucson, AZ 85721 USA Univ Arizona Tucson AZ USA 85721 Arizona, Dept Chem, Tucson, AZ 85721 USA
Titolo Testata:
ADVANCED FUNCTIONAL MATERIALS
fascicolo: 3, volume: 11, anno: 2001,
pagine: 229 - 234
SICI:
1616-301X(200106)11:3<229:OSODPI>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIELD-EFFECT TRANSISTORS; 3-DIMENSIONAL STRUCTURE; TRANS-POLYACETYLENE; INTRINSIC DEFECTS; CHARGE-TRANSPORT; ABSORPTION; EXCITATIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Beljonne, D Univ Mons, Lab Chem Novel Mat, Ctr Res Mol Elect & Photon, Pl Parc 20, B-7000 Mons, Belgium Univ Mons Pl Parc 20 Mons Belgium B-7000 B-7000 Mons, Belgium
Citazione:
D. Beljonne et al., "Optical signature of delocalized polarons in conjugated polymers", ADV FUNCT M, 11(3), 2001, pp. 229-234

Abstract

Quantum-chemical calculations, incorporating both electron-phonon and electron-electron effects, are performed on two-chain model aggregates to assess the influence of interchain interactions on the nature of the singly charged species (polarons) in organic conjugated polymers. In symmetric cofacial dimers with fixed intermolecular distances, our theoretical approach leads to polarons fully delocalized over the two conjugated chains. Such a delocalization strongly affects the geometric and electronic relaxation phenomena induced by charge injection, which in turn leads to a dramatic spectral redistribution of the linear absorption cross section. Optical signatures for delocalized polarons in conjugated materials are identified from our theoretical description and compared to experimental data from optical charge modulation spectroscopy; these are fingerprints for the degree of interchain order, a decisive factor in the achievement of high charge carrier mobilities in polymer-based field-effect transistors.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 10:32:56