Photoinduced electron transfer in donor/acceptor double-cable polymers

Antonio Cravino, Gerald Zerza, Helmut Neugebauer, Stefania Bucella, Michele Maggini, Mattias Svensson, Mats R. Andersson, N. Serdar Sariciftci

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    Fullerenes are promising as electron accepting/transporting materials in organic devices. In particular, mixtures of fullerenes and conjugated polymers are attractive for the fabrication of low-cost, large-area flexible solar cells and photodetectors. The preparation of a well structured, ordered fullerene phase in these composite films seems to be crucial for donor-acceptor interactions and to get continous conducting pathways for the photogenerated electrons. With the so-called "double-cable" polymers, where fullerene units are covalently linked to a polyconjugated chain, the fort-nation of interconnected, continous donor and acceptor networks should be driven by the primary structure of the polymer. Unwanted phase separation should be avoided with this strategy.

    Starting from a novel bithiophene-fulleropyrrolidine dyad we have prepared electrochemically a polythiophene carrying fullerene moieties. Thin solid films of this double-cable polymer have been studied by means of cyclic voltammetry and photoexcited spectroscopy (photoinduced absorption, light induced ESR). The results show that the donor and the acceptor moieties, which are mutually independent in the ground-state, undergo electron transfer upon illumination. Thus, the necessary condition for photoactivity in solar cells is fulfilled.
    Original languageEnglish
    Title of host publicationFullerenes for the new millennium :
    Subtitle of host publicationproceedings of the International Symposium on Fullerenes, Nanotubes, and Carbon Nanoclusters
    EditorsPV Kamat, DM Guldi, KM Kadish
    Place of PublicationPennington, NJ
    PublisherELECTROCHEMICAL SOCIETY INC
    Pages94-100
    Volume11
    ISBN (Print)1566773172
    Publication statusPublished - 2001
    EventInternational Symposium on Fullerenes, Nanotubes, and Carbon Nanoclusters - Washington, DC, United States
    Duration: 25 Mar 200129 Mar 2001

    Publication series

    NameELECTROCHEMICAL SOCIETY SERIES
    PublisherELECTROCHEMICAL SOCIETY INC
    Number11

    Conference

    ConferenceInternational Symposium on Fullerenes, Nanotubes, and Carbon Nanoclusters
    Country/TerritoryUnited States
    CityWashington, DC
    Period25/03/0129/03/01

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