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Top-Down Approach for Nanophase Reconstruction in Bulk Heterojunction Solar Cells

Authors

  • Jaemin Kong,

    1. Heeger Center for Advanced Materials, Research Institute for Solar & Sustainable Energies, Gwangju Institute of Science & Technology, Gwangju, Republic of Korea
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    • These authors contributed equally to this work.

  • In-Wook Hwang,

    Corresponding author
    1. Advanced Photonics Research Institute, Gwangju Institute of Science & Technology, Gwangju, Republic of Korea
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    • These authors contributed equally to this work.

  • Kwanghee Lee

    Corresponding author
    1. Heeger Center for Advanced Materials, Research Institute for Solar & Sustainable Energies, Gwangju Institute of Science & Technology, Gwangju, Republic of Korea
    2. School of Materials Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, Republic of Korea
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Abstract

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“Top-Down” nanophase reconstruction via a post-additive soaking process is first presented with various BHJ binary composites. By simply rinsing as-cast BHJ films with a solvent mixture containing a few traces of a nanophase-control reagent such as 1,8-diiodooctane, oversized fullerene-rich clusters (>100 nm in dia­meter) in the BHJ film are instataneously disassembled and entirely reorganized into finely intermixed donor/acceptor nanophases (ca. 10 nm) with a 3D compositional homogeneity, without surface segregation.

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