A mechanistic understanding of processing additive-induced efficiency enhancement in bulk heterojunction organic solar cells.

Schmidt, Kristin; Tassone, Christopher J; Niskala, Jeremy R; Yiu, Alan T; Lee, Olivia P; Weiss, Thomas M; Wang, Cheng; Fréchet, Jean M J et al. · Adv Mater · 2014

basic_science · Level V

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Abstract

The addition of processing additives is a widely used approach to increase power conversion efficiencies for many organic solar cells. We present how additives change the polymer conformation in the casting solution leading to a more intermixed phase-segregated network structure of the active layer which in turn results in a 5-fold enhancement in efficiency.

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