Inside Cover, Volume 49, Issue 17


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The low electronic mobility of blends of polymer and fullerene derivatives, as are often used in polymeric photoactive layers in devices such as solar cells, can be improved by incorporating carbon nanotubes (CNTs) as secondary acceptors. On page 1269 of this issue, Michael Hickner and colleagues use electropolymerization of thiophene monomers into a CNT mat to create dense polythiophene/CNT composites as shown in the figure. By using the electropolymerization technique they are able to orient the thiophene rings parallel to the electrode surface and achieve charge transfer between the polymer and CNT phases, leading to superior charge transport properties in the CNT/polymer composite compared to the pure polymer film.