Using self-organization to control morphology in molecular photovoltaics

Seok Ju Kang, Seokhoon Ahn, Jong Bok Kim, Christine Schenck, Anna M. Hiszpanski, Seokjoon Oh, Theanne Schiros, Yueh Lin Loo, Colin Nuckolls

Research output: Contribution to journalArticlepeer-review

119 Scopus citations


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-C70-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 PC 70BM. 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.

Original languageEnglish (US)
Pages (from-to)2207-2212
Number of pages6
JournalJournal of the American Chemical Society
Issue number6
StatePublished - Feb 13 2013

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Biochemistry
  • Catalysis
  • Colloid and Surface Chemistry


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