Improved Photovoltaic Performance of PPV-Based Copolymers Using Optimized Fullerene-Based Counterparts

摘要

Organic polymer-based bulk heterojunction solar cells have been intensively developed during the last decade. Historically, conjugated polymers of the PPV (para-phenylene vinylene) family such as poly(2-[(3'-7'-dimethyloctyl)oxy]-5-methoxy-l,4-phenylene}-1,2-ethenediyl) (MDMO-PPV) and poly({[(2-ethylhexyl)oxy]-5-methoxy-l,4-phenylene}-1,2-ethenediyl) (MEH-PPV) were among the very first electron-donor materials utilized for the construction of plastic solar cells. Power-conversion efficiencies up to 2.5-3.0% have been obtained for solar cells based on the blends of fullerene derivatives [6,6]-phenyl-C_(61)-butyric acid methyl ester ([60]PCBM) and [6,6]-phenyl-C_(71)-butyric acid methyl ester ([70]PCBM), and MDMO-PPV.