Effect of aggregation on photocurrent generation in polyfluorene doped with violanthrone

Charge transfer in poly(9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl) (PF2/6) doped with Violanthrone dye has been studied by photocurrent measurements. We demonstrate strong correlation between the morphology of the blend film and the efficiency of the photodiodes. This enables us to identify the best morphology in terms of efficiency.