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Amy M. Ballantyne, Lichun Chen, Justin Dane, Thomas Hammant, Felix M. Braun, Martin Heeney, Warren Duffy, Iain McCulloch, Donal D. C. Bradley and Jenny Nelson The Effect of Poly(3-hexylthiophene) Molecular Weight on Charge Transport and the Performance of Polymer:Fullerene Solar Cells Advanced Functional Materials 18

Version of Record online: 30 JUL 2008 | DOI: 10.1002/adfm.200800145

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Increasing the molecular weight of P3HT above 34 kDa was found to significantly decrease the mobility of both holes and electrons in P3HT:PCBM blend films and the performance of photovoltaic devices. The effect was attributed to a change in morphology and packing of the polymer chains.

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