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.
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 language | English |
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Title of host publication | Fullerenes for the new millennium : |
Subtitle of host publication | proceedings of the International Symposium on Fullerenes, Nanotubes, and Carbon Nanoclusters |
Editors | PV Kamat, DM Guldi, KM Kadish |
Place of Publication | Pennington, NJ |
Publisher | ELECTROCHEMICAL SOCIETY INC |
Pages | 94-100 |
Volume | 11 |
ISBN (Print) | 1566773172 |
Publication status | Published - 2001 |
Event | International Symposium on Fullerenes, Nanotubes, and Carbon Nanoclusters - Washington, DC, United States Duration: 25 Mar 2001 → 29 Mar 2001 |
Publication series
Name | ELECTROCHEMICAL SOCIETY SERIES |
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Publisher | ELECTROCHEMICAL SOCIETY INC |
Number | 11 |
Conference
Conference | International Symposium on Fullerenes, Nanotubes, and Carbon Nanoclusters |
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Country/Territory | United States |
City | Washington, DC |
Period | 25/03/01 → 29/03/01 |