Fig. 3: Optical and molecular structural properties.
From: Light-intensity-dependent photoresponse time of organic photodetectors and its molecular origin
a Normalized UV-Vis absorption spectra for NP-SA, MPTA and respective C60 blends. b Absolute photoluminescence (measured by 514 nm excitation and corrected for absorbance) for neat donor thin films. c Normalized PL for blends and neat MPTA, measured by 514 nm excitation. d, e Comparison between normalized Raman spectra (via 488 nm laser excitation) of neat and blended NP-SA and MPTA films. The peaks are labeled according to the detailed assignment shown in the Supplementary Information and grouped according to core and end-group vibrational modes. The asterisk in (d) indicates the C60 vibrational mode appearing in blends.
