Enhanced photocurrent by Schottky-barrier solar cell composed of regioregular polythiophene with merocyanine dye

When electron-transfer from poly(3-hexylthiophene-2, 5-diyl) (PTh6) to merocyanine dye (MC) occurred in the mixed solid under illumination, the photocurrent of Al/MC+PTh6 mixed solid Schottky-barrier cell was enhanced compared to that of pure MC or pure PTh6 cell. This is because discrete pairs of electron and hole created by the photoinduced electron-transfer are effectively separated in the electric field formed at the Al/organic solid interface.