Oligo(poly)thiophene sensitization of CdSe nanocrystal and TiO2 polycrystalline electrodes: A photoelectrochemical investigation (Articolo in rivista)

Type
Label
  • Oligo(poly)thiophene sensitization of CdSe nanocrystal and TiO2 polycrystalline electrodes: A photoelectrochemical investigation (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/jp209042c (literal)
Alternative label
  • Vercelli B.; Zotti G.; Berlin A.; Pasini M.; Botta C.; Gerbasi R.; Nelson T.L.; McCullough R.D. (2012)
    Oligo(poly)thiophene sensitization of CdSe nanocrystal and TiO2 polycrystalline electrodes: A photoelectrochemical investigation
    in Journal of physical chemistry. C
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vercelli B.; Zotti G.; Berlin A.; Pasini M.; Botta C.; Gerbasi R.; Nelson T.L.; McCullough R.D. (literal)
Pagina inizio
  • 2033 (literal)
Pagina fine
  • 2039 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.acs.org/doi/abs/10.1021/jp209042c (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 116 (literal)
Rivista
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  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1,2 : Istituto CNR per l'Energetica e le Interfasi, C.o Stati Uniti 4, 35127 Padova, Italy 3 : Istituto CNR di Scienze e Tecnologie Molecolari, Via C. Golgi 19, 20133 Milano, Italy 4,5 : Istituto CNR per Lo Studio Delle Macromolecole, Via E. Bassini 15, 20133 Milano, Italy 6 : Istituto CNR di Chimica Inorganica e Delle Superfici, C.o Stati Uniti 4, 35127 Padova, Italy 7 : Department of Chemistry, Carnegie Mellon University, 4400 Fifth Ave, Pittsburgh, PA 15213, United States (literal)
Titolo
  • Oligo(poly)thiophene sensitization of CdSe nanocrystal and TiO2 polycrystalline electrodes: A photoelectrochemical investigation (literal)
Abstract
  • Oligo(poly)thiophenes were investigated by photoelectrochemical methods as monolayer sensitizers of CdSe nanocrystal (CdSe-NCs) and TiO 2 polycrystalline films on ITO electrodes. 7.5 nm diameter CdSe-NCs layers and polycrystalline (anatase, ca. 40 nm crystallite size) TiO 2films were functionalized with an ?,?-dicarboxylic sexithiophene and with two polythiophenes, bearing differently spaced side carboxylic terminals, including regioregular poly(thiophene-3-propionic acid). The modified electrodes were investigated in a three-electrode photoelectrochemical cell in the presence of iodide as sacrificial generator of intense and steady oxidative photocurrents. The oligo(poly)thiophenes act in general as moderate hypersensitizers (roughly twice more efficient than calculated). Poly(thiophene-3-propionic acid) monolayers, formed on CdSe-NC structures from ethanol, generate a strong hypersensitization, i.e., a response 5 times higher than expected. From optical and photoluminescence analysis such a result is attributed to a flat disposition of the thiophene planes on the surface which allows a faster phototransport. CdSe-NC sensitization of the ITO and TiO 2 surfaces is also reported in detail. (literal)
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