Electron Microscopy of Organic Solar Cells Thermally Stabilized with Fullerene Nucleating Agents
نویسندگان
چکیده
Organic Solar Cells (OSCs) have a great potential for solar energy harvesting due to their low material cost and cheap production. The most common and promising type of OSC is the bulk-heterojunction (BHJ) OSC, which have shown power-conversion efficiencies of 8-10% [1]. The absorber layer in these OSCs consists of a mix of two phases; (i) a polymer, that serves as an electron donor, and (ii) a fullerene, that serves as electron acceptor. The performance of BHJ OSCs is directly related to the threedimensional microstructure of the absorber layer as the charge carriers generated must have access to paths of easy transport to avoid entrapment and recombination. It is thus necessary that the polymer and the fullerene phase form an intertwined continuous network on the nanoscale.
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