Unique cohesive nature of the β1-isomer of [70]PCBM fullerene on structures and photovoltaic performances of bulk heterojunction films with PffBT4T-2OD polymers

Tomokazu Umeyama; Kensho Igarashi; Daisuke Sakamaki; Shu Seki; Hiroshi Imahori

doi:10.1039/C7CC08947C

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Unique cohesive nature of the β₁-isomer of [70]PCBM fullerene on structures and photovoltaic performances of bulk heterojunction films with PffBT4T-2OD polymers†

Tomokazu Umeyama,

*^a Kensho Igarashi,

^a Daisuke Sakamaki,

^a Shu Seki

^a and Hiroshi Imahori

*^ab

Author affiliations

* Corresponding authors

^a Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
E-mail: umeyama@scl.kyoto-u.ac.jp, imahori@scl.kyoto-u.ac.jp

^b Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan

Abstract

The effects of regioisomer and diastereomer separations of [70]PCBM on structures and photovoltaic properties of PffBT4T-2OD:[70]PCBM blend films have systematically been investigated for the first time. Decreasing the amount of a diastereomer of β-[70]PCBM with high aggregation tendency (β₁-[70]PCBM) improved the photovoltaic performances.

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Article information

DOI: https://doi.org/10.1039/C7CC08947C
Article type: Communication
Submitted: 21 Nov 2017
Accepted: 12 Dec 2017
First published: 18 Dec 2017

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Chem. Commun., 2018,54, 405-408

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Unique cohesive nature of the β₁-isomer of [70]PCBM fullerene on structures and photovoltaic performances of bulk heterojunction films with PffBT4T-2OD polymers

T. Umeyama, K. Igarashi, D. Sakamaki, S. Seki and H. Imahori, Chem. Commun., 2018, 54, 405 DOI: 10.1039/C7CC08947C

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