Small-bandgap semiconducting polymers with high near-infrared photoresponse.

Lowering the optical bandgap of conjugated polymers while maintaining a high efficiency for photoinduced charge transfer to suitable electron acceptors such as fullerene has remained a formidable challenge in the area of organic photovoltaics. Here we present the synthesis and application of a series of ultra-small-bandgap donor-acceptor polymers composed… CONTINUE READING