| 초록 |
Bulk heterojunction (BHJ) polymer solar cells (PSC) present one of the most promising options for alternative energy sources. BHJs consist of a blend of an electron donor (D, e.g., a photoactive polymer) and an electron acceptor (A, e.g., PCBM or its derivatives). Electricity is generated in a device via four consecutive steps: the generation of excitons by an active polymer that absorbs light, the diffusion of excitons toward PCBM units, the dissociation of excitons into free charge carriers (holes and electrons), and the transport of free charge carriers to their respective electrodes. A high interfacial area in a BHJ is important for reducing the exciton diffusion length (less than 10 nm) required to reach the interface between the donor and acceptor domains. A high interfacial area can enhance the generation of photo-induced electrons in a PSC. Here, I will present novel intramolecular and intermolecular doping strategies, which modulate hole mobility, nanostructures, and photovoltaic performances. |
