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Acceptor influence on hole mobility in fullerene blends with alternating copolymers of fluorene
Article in journal
Lars Mattias Andersson, Olle Inganäs
Publication Year
Applied Physics Letters, 2006, (88), 082103
Link to Source (DOI)
<p>Hole<sup> </sup>mobility in polyfluorene/fullerene blends has been studied with field effect<sup> </sup>transistors. Two different C60 derivatives and one C70 derivative have<sup> </sup>been investigated together with two different polyfluorenes. Mobility is presented<sup> </sup>as a function of acceptor loading at ratios suitable for<sup> </sup>photovoltaics and varies between 10<sup>–3</sup> and 10<sup>–5</sup>  cm<sup>2</sup>  V<sup>–1</sup>  s<sup>–1</sup> depending on the<sup> </sup>polymer/acceptor combination. The hole mobility is increased in blends with<sup> </sup>the commonly used acceptor [6-6]-phenyl-C<sub>61</sub>-butyric acid methylester (PCBM). With related<sup> </sup>C60 and C70 derivatives the hole mobility is decreased under<sup> </sup>the same circumstances.</p>