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Jeon I, Delacou C, Nakagawa T, et al. Enhancement of Open-Circuit Voltage by Using the 58-π Silylmethyl Fullerenes in Small-Molecule Organic Solar Cells. Chem Asian J. 2016;11(8):1268-72doi: 10.1002/asia.201501400.
Jeon, I., Delacou, C., Nakagawa, T., & Matsuo, Y. (2016). Enhancement of Open-Circuit Voltage by Using the 58-π Silylmethyl Fullerenes in Small-Molecule Organic Solar Cells. Chemistry, an Asian journal, 11(8), 1268-72. https://doi.org/10.1002/asia.201501400
Jeon, Il, et al. "Enhancement of Open-Circuit Voltage by Using the 58-π Silylmethyl Fullerenes in Small-Molecule Organic Solar Cells." Chemistry, an Asian journal vol. 11,8 (2016): 1268-72. doi: https://doi.org/10.1002/asia.201501400
Jeon I, Delacou C, Nakagawa T, Matsuo Y. Enhancement of Open-Circuit Voltage by Using the 58-π Silylmethyl Fullerenes in Small-Molecule Organic Solar Cells. Chem Asian J. 2016 Apr 20;11(8):1268-72. doi: 10.1002/asia.201501400. Epub 2016 Feb 18. PMID: 26840629.
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Chem Asian J. 2016 Apr 20;11(8):1268-72. doi: 10.1002/asia.201501400. Epub 2016 Feb 18.

Enhancement of Open-Circuit Voltage by Using the 58-π Silylmethyl Fullerenes in Small-Molecule Organic Solar Cells.

Chemistry, an Asian journal

Il Jeon, Clément Delacou, Takafumi Nakagawa, Yutaka Matsuo

Affiliations

  1. Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  2. Department of Mechanical Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
  3. Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. [email protected].

PMID: 26840629 DOI: 10.1002/asia.201501400

Abstract

The application of 58-π-1,4-bis(silylmethyl)[60]fullerenes, C60 (CH2 SiMe2 Ph)(CH2 SiMe2 Ar) (Ar=Ph and 2-methoxylphenyl for SIMEF-1 and SIMEF-2, respectively), in small-molecule organic solar cells with a diketopyrrolopyrrole donor (3,6-bis[5-(benzofuran-2-yl)thiophen-2-yl]-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4-dione (DPP(TBFu)2 )) is demonstrated. With the 58-π-silylmethyl fullerene acceptor, SIMEF-1, the devices showed the highest efficiency of 4.57 % with an average of 4.10 %. They manifested an improved open-circuit voltage (1.03 V) owing to the high-lying LUMO level of SIMEF-1, while maintaining a high short-circuit density (9.91 mA cm(-2) ) through controlling the crystallinity of DPP by thermal treatment. On the other hand, despite even higher open-circuit voltage (1.05 V), SIMEF-2-based devices showed lower performances of 3.53 %, owing to a low short-circuit current density (8.33 mA cm(-2) ) and fill factor (0.40) arising from the asymmetric structure, which results in a lower mobility and immiscibility.

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: donor-acceptor systems; electrochemistry; fullerenes; photochemistry; solar cells

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