6 October 2014 Pyrrolidinone derivatives as processing additives for solution processed organic solar cells
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Processing additives are widely used to increase the efficiency of solution processed organic solar cells. We use the Hansen solubility parameters (HSPs) to investigate novel processing additives. The HSPs predict pyrrolidinone derivatives to be efficient processing additives for OSC systems based on poly(3-hexylthiophene)/[6,6]-phenyl-C61- butyric acid methyl ester (P3HT/PCBM). Two pyrrolidinone derivatives are identified: 1-methyl-2-pyrrolidinone and 1- benzyl-2-pyrrolidinone. The processing additives are introduced with various concentrations in the formulation of P3HT and PCBM solution. The electrical characterizations show that the two processing additives significantly increase the short circuit current and thus the power conversion efficiency of the OSCs. The results thus highlight HSPs as an effective and relatively straightforward tool that can be employed to optimize OSC morphology from a theoretical standpoint. Such a tool will be invaluable for identifying additives for novel high efficiency polymer species as they are synthesized, and thus to streamline the device fabrication and device optimization process.
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Uyxing Vongsaysy, Uyxing Vongsaysy, Bertrand Pavageau, Bertrand Pavageau, Laurent Servant, Laurent Servant, Hany Aziz, Hany Aziz, } "Pyrrolidinone derivatives as processing additives for solution processed organic solar cells", Proc. SPIE 9184, Organic Photovoltaics XV, 91841V (6 October 2014); doi: 10.1117/12.2061381; https://doi.org/10.1117/12.2061381

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