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(a) Photoluminescence spectra of RR-P3HT films (a spectrum of the dry film in red and a spectrum of the film in contact with 0.1 M H2SO4 in black) at 550 nm excitation wavelength. (b) Proposed mechanism of RR-P3HT photocathodic activity in an aqueous solution. Adapted with permission from ref (143). Copyright 2013 Royal Society of Chemistry.
