Abstract
The combined W-band pulsed light-induced multiresonance ESR/ENDOR/TRIPLE technique and DFT calculation have been applied to study the 1H hyperfine coupling and electron spin density distribution on PPV cation and PC61BM anion radicals in (PPVs):PC61BM blends. The sign of calculated electron spin density populations of protons delocalized on polymer and fullerene side chain has been confirmed experimentally by means of TRIPLE in frozen solution at the temperature of 20 K.
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