Resonant Raman scattering dispersion in poly(dithieno[3,4-b : 3 ',4-d]-thiophene): 2A(g) spectroscopy (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Resonant Raman scattering dispersion in poly(dithieno[3,4-b : 3 ',4-d]-thiophene): 2A(g) spectroscopy (Articolo in rivista) (literal)

Anno

• 2005-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/j.synthmet.2005.02.015 (literal)

Alternative label

• Ehrenfreund E.; Cravino A.; Neugebauer H.; Sariciftci N.S.; Luzzati S.; Catellani M. (2005)
  Resonant Raman scattering dispersion in poly(dithieno[3,4-b : 3 ',4-d]-thiophene): 2A(g) spectroscopy
  in Synthetic metals; Elsevier Science SA, Lausanne (Svizzera)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Ehrenfreund E.; Cravino A.; Neugebauer H.; Sariciftci N.S.; Luzzati S.; Catellani M. (literal)

Pagina inizio

• 251 (literal)

Pagina fine

• 253 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://www.sciencedirect.com/science/article/pii/S0379677905001062 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 150 (literal)

Rivista

• Synthetic metals (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 3 (literal)

Note

• ISI Web of Science (WOS) (literal)
• Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• ISMAC CNR E. Ehrenfreund,: Ist. Techn. Haifa Israel A. Cravino; H. Neugebauer, N.S. Sariciftci,: Uni. Linz Austria (literal)

Titolo

• Resonant Raman scattering dispersion in poly(dithieno[3,4-b : 3 ',4-d]-thiophene): 2A(g) spectroscopy (literal)

Abstract

• Small band gap semiconducting pi-conjugated polymers may, in principle, be more efficient as the active media in solar cells, due to their better adaptability to the solar spectrum. In luminescent pi-conjugated polymers, interband photon absorption results in the radiative recombination of the photogenerated excitons, which competes with charge separation. The photoluminescence (PL) quantum efficiency is largely determined by the relative energies of the optically allowed lowest odd parity (LOP, e.g. 1B(u))excited state and the optically forbidden lowest even parity (LER e.g. 2A(g)) excited state. If E(LEP)< E(LOP), the quantum efficiency is small and charge separation following photoexcitation is more likely than in efficient PL polymers. The determination of the relative position of LEP and LOP states is therefore essential for the possible utilization of small band gap pi-conjugated polymers in practical devices. It was previously shown that resonant Raman scattering dispersion might serve as a spectroscopic tool for the determination of the LEP states, since the dispersion is solely determined by the dependence of the LEP state on the conjugation length, rather than that of the optical gap, or LOP state. In this work, we use the Raman spectra measured in poly(dithieno-thiophene) (PDTT1) in order to estimate the LEP energy level. We find that the LEP energy level is in the vicinity of the optical gap. (literal)

Editore

• Elsevier Science SA (Editore)

Prodotto di

• Sviluppo di Materiali e Dispositivi per il Fotovoltaico Organico (PM.P04.001.005) (Modulo)
• Istituto per lo studio delle macromolecole (ISMAC) (Istituto)

Autore CNR

• SILVIA LUZZATI (Unità di personale interno)
• MARINELLA CATELLANI (Persona)

Incoming links:

Autore CNR di

• SILVIA LUZZATI (Unità di personale interno)
• MARINELLA CATELLANI (Persona)

Prodotto

• Istituto per lo studio delle macromolecole (ISMAC) (Istituto)
• Sviluppo di Materiali e Dispositivi per il Fotovoltaico Organico (PM.P04.001.005) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Synthetic metals (Rivista)

Editore di

• Elsevier Science SA (Editore)