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Issue 1, 2017
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Regioisomer effects of [70]fullerene mono-adduct acceptors in bulk heterojunction polymer solar cells

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Abstract

Despite numerous organic semiconductors being developed during the past decade, C70 derivatives are predominantly used as electron acceptors in efficient polymer solar cells (PSCs). However, as-prepared C70 mono-adducts intrinsically comprise regioisomers that would mask individual device performances depending on the substituent position on C70. Herein, we separate the regioisomers of C70 mono-adducts for PSC applications for the first time. Systematic investigations of the substituent position effect using a novel symmetric C70 mono-adduct ([70]NCMA) and a prevalent, high-performance one ([70]PCBM) reveals that we can control the structures of the blend films with conjugated polymers and thereby improve the PSC performances by regioisomer separation. Our approach demonstrates the significance of exploring the best-matching regioisomer of C70 mono-adducts with high-performance conjugated polymers, which would achieve a remarkable progress in PSC devices.

Graphical abstract: Regioisomer effects of [70]fullerene mono-adduct acceptors in bulk heterojunction polymer solar cells

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Publication details

The article was received on 05 Jul 2016, accepted on 06 Aug 2016 and first published on 19 Aug 2016


Article type: Edge Article
DOI: 10.1039/C6SC02950G
Citation: Chem. Sci., 2017,8, 181-188
  • Open access: Creative Commons BY-NC license
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    Regioisomer effects of [70]fullerene mono-adduct acceptors in bulk heterojunction polymer solar cells

    T. Umeyama, T. Miyata, A. C. Jakowetz, S. Shibata, K. Kurotobi, T. Higashino, T. Koganezawa, M. Tsujimoto, S. Gélinas, W. Matsuda, S. Seki, R. H. Friend and H. Imahori, Chem. Sci., 2017, 8, 181
    DOI: 10.1039/C6SC02950G

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