Light-induced EPR spectroscopy of charge carriers photoinduced in polymer/fullerene bulk heterojunctions
作者： V. I. Krinichnyi , E. I. Yudanova
DOI: 10.1063/1.3212827
关键词:
摘要: Composites of conjugated polymers with fullerenes are perspective materials for polymer photovoltaics. Light-induced EPR (LEPR) study magnetic, relaxation, and dynamic parameters polaron-fullerene radical pairs photoinduced in fullerene-modified poly(3-alkylthiophenes) is described. Weak interaction between positively charged polaron negatively fullerene ion the allowed to determine separately all their dynamics parameters. Paramagnetic susceptibility charge carriers reflects activation spin exchange composite. Decay long-living anion depends on a spatial distance them energy exciting photons. One-dimensional diffusion along chain rotation near its own main molecular axis were shown follow Elliot hopping model be governed by photon energy. The deviation energies ...
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