Solution-processable bulk heterojunction (BHJ) solar cells offer a promising technology for solar energy conversion because of their low-cost fabrication, light weight, and potential use in large-area flexible devices. Most of the research in the field of organic photovoltaics (OPVs) has been focused on developing solar cells with a conjugated polymer (CP) as a donor compound. The ability of a polymer/fullerene acceptor blend to form a bicontinuous interpenetrating nanoscale network which provides efficient exciton dissociation and charge transport has made polymeric donors the most promising materials for photovoltaic devices. At present the best solar cells with this type of donor exhibit power conversion efficiencies (PCE) of 8-9 , which is close to the desired 10 PCE milestone.
展开▼
