File Name : figs1.tif Caption : fig. s1 iv-characteristics of p3ht device in dark and under illumination. File Name : figs2.tif Caption : fig. s2 uv-vis absorption spectrum of the neat p3ht thin film. File Name : figs3.tif Caption : fig. s3 shows the normalized differential transmission measured at 650 nm in a neat p3ht thin film with 24 μj/cm2 initial pump excitation at 520 nm. the transient has been taken averaging just three loops.