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Keywords:

  • inverted solar cells;
  • polymer solar cells;
  • interfacial materials;
  • nonconjugated polyelectrolytes;
  • self-assembly
Thumbnail image of graphical 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.