Using Self-Organization To Control Morphology in Molecular Photovoltaics

作者：Kang Seok Ju; Ahn Seokhoon; Kim Jong Bok; Schenck Christine; Hiszpanski Anna M; Oh Seokjoon; Schiros Theanne; Loo Yueh Lin; Nuckolls Colin^*

来源：Journal of the American Chemical Society, 2013, 135(6): 2207-2212.

DOI：10.1021/ja308628z

This work explores the formation of well-defined molecular p-n junctions in solution-processed self-assembled heterojunction solar cells using dodecyloxy-substituted contorted hexabenzocoronene (12-c-HBC) as a donor material and phenyl-C-70-butyric acid methyl ester (PC70BM) as an acceptor. We find that the contorted 12-c-HBC molecules effectively assemble in solution to form a nested structure with the ball-shaped PC70BM. The result is a self-assembled molecular-scale p-n junction. When this well-defined p-n junction is embedded in active films, we can make efficient self-assembled solar cells with minimal amounts of donor material relative to the acceptor. The power conversion efficiency is drastically enhanced by the mode of donor and acceptor assembly within the film.

• 出版日期2013-2-13