Organic photovoltaic devices (OPV) are encouraging solar cells due to their low-cost power generation and their ease of process. The control of thin film morphology at the nanoscale is a key parameter for reducing the loss due to low carrier mobility and the unwanted recombination of photo-generated charges. A highly purified conjugated rod--coil-rod triblock copolymer of poly(3-hexylthiohphene) (P3HT) and poly(acrylic acid) was synthesized following our novel synthesis route that utilizes �click chemistry�. For the first time, we have reproduced the spectroscopic properties of a P3HT thin film with a stable system in solution by adding a non-solvent (methanol) to the triblock copolymer. Surprisingly, the interaction of only two P3HT chains describes completely the bulk interactions. This less complex and well defined system gives us the opportunity to bridge from single chain to thin film morphologies.

Probing the origin of conjugated polymer film morpholgy: Chain interaction in a P3HT derivative triblock copolymer

242nd National Meeting (2011)

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