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Keywords:

  • Atomic force microscopy;
  • Organic solar cells;
  • Small-molecule systems;
  • Solution processing;
  • UV photoelectron spectroscopy
Thumbnail image of graphical abstract

The inside cover of this issue illustrates the fabrication of lightweight and flexible organic solar cells, developed by B. Walker et al. on page 3063, from a solution of fullerene and diketopyrrolopyrrole-based materials. The texture of the organic film on the substrate was taken from an atomic force microscope phase image of the high performance device (4.4% power conversion efficiency), showing the phase separation behavior of the two molecular semiconducting materials.