Nanostructured Two-Component Liquid-Crystalline Electrolytes for High-Temperature Dye-Sensitized Solar Cells

DOI Web Site 16 Citations 50 References Open Access
  • Daniel Högberg
    Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • Bartolome Soberats
    Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • Satoshi Uchida
    Research Center for Advanced Science and Technology, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8904, Japan
  • Masafumi Yoshio
    Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • Lars Kloo
    Applied Physical Chemistry, KTH Royal Institute of Technology, SE 100 44 Stockholm, Sweden
  • Hiroshi Segawa
    Research Center for Advanced Science and Technology, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8904, Japan
  • Takashi Kato
    Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

Bibliographic Information

Published
2014-11-11
Resource Type
journal article
Rights Information
  • http://pubs.acs.org/page/policy/authorchoice_termsofuse.html
DOI
  • 10.1021/cm503090z
Publisher
American Chemical Society (ACS)

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Description

Nanostructured liquid-crystalline (LC) ion transporters have been developed and applied as new electrolytes for dye-sensitized solar cells (DSSCs). The new electrolytes are two-component liquid crystals consisting of a carbonate-based mesogen and an ionic liquid that self-assemble into two-dimensional (2D) nanosegregated structures forming well-defined ionic pathways suitable for the I–/I3– redox couple transportation. These electrolytes are nonvolatile and they show LC phases over wide temperature ranges. The DSSCs containing these electrolytes exhibit exceptional open-circuit voltages (Voc) and improved power conversion efficiencies with increasing temperature. Remarkably, these solar cells operate at temperatures up to 120 °C, which is, to the best of our knowledge, the highest working temperature reported for a DSSC. The nature of the LC electrolyte and the interactions at the TiO2 electrode/electrolyte interface lead to a partial suppression of electron recombination reactions, which is key in the ex...

Journal

  • Chemistry of Materials

    Chemistry of Materials 26 (22), 6496-6502, 2014-11-11

    American Chemical Society (ACS)

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