Nanofi ber - Based Bulk - Heterojunction Organic Solar Cells
نویسندگان
چکیده
Bulk heterojunction organic photovoltaic (BHJ–OPV) devices have been the topic of ever increasing research efforts due to their potential to result in printable, inexpensive solar cells which can be processed onto fl exible substrates. [ 1–3 ] Typically, the active layer of the BHJ consists of an interpenetrating network of electrondonating conjugated polymers and electron-accepting fullerenes. One of the most studied BHJ–OPV systems consists of a mixture of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM). [ 1 , 4 ] It is widely accepted that for BHJ–OPV devices to be economically viable, power-conversion effi ciencies (PCEs) need to reach 10%. [ 3 , 5 ] The highest PCE values obtained for P3HT:PCBM devices have been in the 4–5% range, [ 6–8 ]
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