Abstract
We report the properties of a new series of wide band gap photovoltaic polymers based on the N-alkyl 2-pyridone dithiophene (PDT) unit. These polymers are effective bulk heterojunction solar cell materials when blended with phenyl-C71-butyric acid methyl ester (PC71BM). They achieve power conversion efficiencies (up to 5.33%) high for polymers having such large bandgaps, ca. 2.0 eV (optical) and 2.5 eV (electrochemical). Grazing incidence wide-angle X-ray scattering (GIWAXS) reveals strong correlations between π-π stacking distance and regularity, polymer backbone planarity, optical absorption maximum energy, and photovoltaic efficiency.
Original language | English (US) |
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Pages (from-to) | 4860-4866 |
Number of pages | 7 |
Journal | Chemical Science |
Volume | 6 |
Issue number | 8 |
DOIs | |
State | Published - Aug 1 2015 |
ASJC Scopus subject areas
- Chemistry(all)