Abstract
Low-cost carbon black nanoparticle (CBNP) was chemically modified by grafting with flexible alkyl groups. The modified CBNP (m-CBNP) forms a spider-like cluster with a considerably enhanced solubility, thereby enabling their uniform dispersal into a polymer matrix or active layers of bulk hetero-junction polymer photovoltaic cells, such as a blend of poly(3-hexylthiophene) and (6,6)-phenyl C61 butyric acid methyl ester. The performance of devices containing the m-CBNP was substantially improved. Charge carrier mobility enhancement was found to play a key role, leading to a 30 % improvement in the short-circuit current of the devices.
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This work was funded in parts by the NNSF China (21174016, 11474017), FRFCU (2013JBZ004), RFDP (No. 20120009110031).
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Zhang, Z., He, Z., Xu, M. et al. Enhancement of polymer photovoltaic performances by doping with modified carbon black nanoparticles. Appl. Phys. A 120, 601–607 (2015). https://doi.org/10.1007/s00339-015-9222-0
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DOI: https://doi.org/10.1007/s00339-015-9222-0