Influence of Porphyrinic Structure on Electron Transfer Processes at the Electrolyte/Dye/TiO2 Interface in PSSCs: a Comparison between meso Push-Pull and beta-Pyrrolic Architectures (Articolo in rivista)

Type

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

Label

• Influence of Porphyrinic Structure on Electron Transfer Processes at the Electrolyte/Dye/TiO2 Interface in PSSCs: a Comparison between meso Push-Pull and beta-Pyrrolic Architectures (Articolo in rivista) (literal)

Anno

• 2014-01-01T00:00:00+01:00 (literal)

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

• 10.1021/am503113x (literal)

Alternative label

• Di Carlo, Gabriele; Caramori, Stefano; Trifiletti, Vanira; Giannuzzi, Roberto; De Marco, Luisa; Pizzotti, Maddalena; Orbelli Biroli, Alessio; Tessore, Francesca; Argazzi, Roberto; Bignozzi, Carlo A. (2014)
  Influence of Porphyrinic Structure on Electron Transfer Processes at the Electrolyte/Dye/TiO2 Interface in PSSCs: a Comparison between meso Push-Pull and beta-Pyrrolic Architectures
  in ACS applied materials & interfaces (Print)
  (literal)

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

• Di Carlo, Gabriele; Caramori, Stefano; Trifiletti, Vanira; Giannuzzi, Roberto; De Marco, Luisa; Pizzotti, Maddalena; Orbelli Biroli, Alessio; Tessore, Francesca; Argazzi, Roberto; Bignozzi, Carlo A. (literal)

Pagina inizio

• 15841 (literal)

Pagina fine

• 15852 (literal)

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

• http://pubs.acs.org/doi/abs/10.1021/am503113x (literal)

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

• 6 (literal)

Rivista

• ACS applied materials & interfaces (Rivista)

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

• 12 (literal)

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

• 18 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• University of Milan; University of Ferrara; ISOF/CNR c/o University of Ferrara; Istituto Italiano di Tecnologia - IIT; Istituto di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM) (literal)

Titolo

• Influence of Porphyrinic Structure on Electron Transfer Processes at the Electrolyte/Dye/TiO2 Interface in PSSCs: a Comparison between meso Push-Pull and beta-Pyrrolic Architectures (literal)

Abstract

• Time-resolved photophysical and photoelectrochemical investigations have been carried out to compare the electron transfer dynamics of a 2-beta-substituted tetraarylporphyrinic dye (ZnB) and a 5,15-meso-disubstituted diarylporphyrinic one (ZnM) at the electrolyte/dye/TiO2 interface in PSSCs. Although the meso push-pull structural arrangement has shown, up to now, to have the best performing architecture for solar cell applications, we have obtained superior energy conversion efficiencies for ZnB (6.1%) rather than for ZnM (3.9%), by using the I-/I-3(-)-based electrolyte. To gain deeper insights about these unexpected results, we have investigated whether the intrinsic structural features of the two different porphyrinic dyes can play a key role on electron transfer processes occurring at the dye-sensitized TiO2 interface. We have found that charge injection yields into TiO2 are quite similar for both dyes and that the regeneration efficiencies by I-, are also comparable and in the range of 75-85%. Moreover, besides injection quantum yields above 80%, identical dye loading, for both ZnB and ZnM, has been evidenced by spectrophotometric measurements on transparent thin TiO2 layers after the same adsorption period. Conversely, major differences have emerged by DC and AC (electrochemical impedance spectroscopy) photoelectrochemical investigations, pointing out a slower charge recombination rate when ZnB is adsorbed on TiO2. This may result from its more sterically hindered macrocyclic core which, besides guaranteeing a decrease of pi-staking aggregation of the dye, promotes a superior shielding of the TiO2 surface against charge recombination involving oxidized species of the electrolyte. (literal)

Prodotto di

• Istituto di scienze e tecnologie molecolari (ISTM) (Istituto)
• Materiali Avanzati per la COnversione di energia Luminosa (MACOL) (PM.P04.010.001) (Modulo)
• Sintesi e caratterizzazione di molecole organiche e complessi metallorganici con specifiche proprietà ottiche (PM.P04.012.002) (Modulo)
• Institute for organic syntheses and photoreactivity (ISOF) (Istituto)

Autore CNR

• ALESSIO ORBELLI BIROLI (Persona)
• ROBERTO ARGAZZI (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Influence of Porphyrinic Structure on Electron Transfer Processes at the Electrolyte/Dye/TiO2 Interface in PSSCs: a Comparison between meso Push-Pull and beta-Pyrrolic Architectures" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto di scienze e tecnologie molecolari (ISTM) (Istituto)
• Institute for organic syntheses and photoreactivity (ISOF) (Istituto)
• Sintesi e caratterizzazione di molecole organiche e complessi metallorganici con specifiche proprietà ottiche (PM.P04.012.002) (Modulo)
• Materiali Avanzati per la COnversione di energia Luminosa (MACOL) (PM.P04.010.001) (Modulo)

Autore CNR di

• ROBERTO ARGAZZI (Unità di personale interno)
• ALESSIO ORBELLI BIROLI (Persona)

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

• ACS applied materials & interfaces (Rivista)

Insieme di parole chiave di

• Keywords of "Influence of Porphyrinic Structure on Electron Transfer Processes at the Electrolyte/Dye/TiO2 Interface in PSSCs: a Comparison between meso Push-Pull and beta-Pyrrolic Architectures" (Insieme di parole chiave)