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CSJ Journals

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2017, Vol.46, No.8

1102-1104

Effect of Alkyl Substituents on 2D and 1D Self-assembly and Photovoltaic Properties of Hydrogen-bonded Oligothiophene Rosettes

Hayato Ouchi ,1Takahiro Kizaki ,2Xu Lin ,3Deepak D. Prabhu ,3Nagahiro Hoshi ,3Fabien Silly ,4Ken-ichi Nakayama ,2,5 and Shiki Yagai *3
1Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522
2Department of Organic Device Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510
3Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522
4TITANS, SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay, F-91191 Gif sur Yvette, France
5Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871
https://doi.org/10.1246/cl.170407

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Abstract

Hydrogen-bonding oligothiophene bearing octyl chains self-assembles into extended nanorods via the formation of cyclic hexamer. The nanorods can function as an electron-donating materials for electron-accepting PC71BM in bulk-heterojunction solar cells.

figure

We report the impact of longer alkyl chains on 2D and 1D assembly. Compared to the previously reported hexylated derivative, newly synthesized octylated derivative showed a lower degree of ordering in 2D assembly on a solid–liquid interface, but higher capability in 1D self-assembly into nanorods upon solution-casting.

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