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Molecular Design Principle of All-organic Dyes for Dye-Sensitized Solar Cells

Authors

  • Dr. Bong-Gi Kim,

    1. Department of Material Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (USA), Fax: (+1) 734-763-4788
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  • Kyeongwoon Chung,

    1. Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (USA)
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  • Prof. Jinsang Kim

    Corresponding author
    1. Department of Material Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (USA), Fax: (+1) 734-763-4788
    2. Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (USA)
    3. Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (USA)
    • Department of Material Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (USA), Fax: (+1) 734-763-4788
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Abstract

All-organic dyes have shown promising potential as an effective sensitizer in dye-sensitized solar cells (DSSCs). The design concept of all-organic dyes to improve light-to-electric-energy conversion is discussed based on the absorption, electron injection, dye regeneration, and recombination. How the electron-donor–acceptor-type framework can provide better light harvesting through bandgap-tuning and why proper arrangement of acceptor/anchoring groups within a conjugated dye frame is important in suppressing improper charge recombination in DSSCs are discussed. Separating the electron acceptor from the anchoring unit in the donor–acceptor-type organic dye would be a promising strategy to reduce recombination and improve photocurrent generation.

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