Advanced Materials

Organic Electronics: Electrostatically Self-Assembled Nonconjugated Polyelectrolytes as an Ideal Interfacial Layer for Inverted Polymer Solar Cells (Adv. Mater. 22/2012)

Authors

  • Hongkyu Kang,

    1. School of Materials Science and Engineering, Heeger Center for Advanced Materials, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea
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  • Soonil Hong,

    1. School of Materials Science and Engineering, Heeger Center for Advanced Materials, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea
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  • Jongjin Lee,

    1. School of Materials Science and Engineering, Heeger Center for Advanced Materials, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea
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  • Kwanghee Lee

    Corresponding author
    1. School of Materials Science and Engineering, Heeger Center for Advanced Materials, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea
    • School of Materials Science and Engineering, Heeger Center for Advanced Materials, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea.
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Abstract

A highly efficient, flexible polymer inverted solar cell is fabricated by K. Lee and co-workers from various colored inks. In the image, an enlarged chemical structure of the interface between an indium tin oxide (ITO) cathode (sky-blue) and a nonconjugated polyelectrolyte (white) is shown. The authors focus in particular on the ionic self-assembling nature of these novel interfacial materials, achieved via dipole interactions, which dramatically reduce the ITO workfunction. These mechanisms are illustrated schematically on page 3005.

original image

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