The broadband probe spectrum from 320 to 640 nm was created subsequently through the use of a CaF2 crystal. Thin films were prepared under inert conditions via dropcasting. A glass plate was used as a substrate sealed oxygen-free with a homemade sample holder. A reference channel for the probe was used to account for pulse-to-pulse energy fluctuations and multiple spectral scans were acquired and averaged for each experiment making sure no sample degradation occurred during the measurement.