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Owing to their increased absorption of light in the visible region, 70fullerene derivatives provide a high photocurrent when incorporated as the electron acceptor in thin-film polymer photovoltaic cells. An incident-photon-to-current efficiency of 66 % is obtained when 70PCBM (see picture) is used in combination with a poly (p-phenylene vinylene). These high currents originate from an ultrafast charge transfer that occurs upon photoexcitation of either the fullerene or the polymer. Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂002/2003/z51647ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Wienk et al. (Thu,) studied this question.