Conversion from solar energy to electric energy is the most important issue for life and many efforts have been devoted to create the solar cells. Fullerene is one of intriguing materials to construct photocurrent conversion cells, because it shows multiple redox events and long-lived excited state upon photo-absorption. Functionalized fullerene derivatives with their formation of self-assembled monolayers (SAMs) have been employed in the photocurrent generation systems. Among various fullerene derivatives, a donar-acceptor system, especially a ferrocene-fullerene dyad have been considered to the most representative photocurrent generation system. However, in general elaborate multi-step synthesis is required to obtain such donor-acceptor molecules and the total yields are not high.
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