We are working to extend our array of strategies for guiding morphological development in polymer blend films in organic photovoltaic devices and are currently exploring approaches for preparing self-assembling polyphenylenevinylene-based materials for use in bulk heterojunction solar cells.  We take advantage of hydrocarbon-fluorocarbon interactions to promote phase segregation within thin polymer blend films.  Our goal is to develop fluorinated systems in which phase segregation at length scales conducive to efficient photoconversion will naturally develop during film casting and annealing, with the expectation that such a strategy can be extended for use with other polymer systems as well.  To this end we have prepared a series of PPV derivatives with varying amounts of hydrocarbon and fluorocarbon functionality in the sidechains.  We report here on absorption profiles, mobility, and overall efficiency of these materials relative to MDMO-PPV, as well as the impact of variation in surface chemistry on these  performance characteristics.

Use of partially fluorinated sidechains in influencing morphology and performance characteristics in BHJ solar cells

243rd National Meeting (2012)

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