Challenges Found When Patterning Semiconducting Polymers with Electric Fields for Organic Solar Cell Applications
Figure 4
(a) Optical microscopy picture of MEH-PPV/PS bilayer film after EHP processing for 22 hours. PS droplets formed on an underlying MEH-PPV/PS film. (b) Removing PS with the selective solvent cyclohexane reveals that the MEH-PPV film has cracked erratically with no preferred wavelength; black spots indicating polymer degradation could visually be seen in such films.
