Design of bicontinuous donor/acceptor morphologies for use as organic solar cell active layers |
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| Authors: | Dylan Kipp Rafael Verduzco Venkat Ganesan |
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| Institution: | 1. Department of Chemical Engineering, University of Texas at Austin, Austin, Texas;2. Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas;3. Department of Materials Science and NanoEngineering, Rice University, Houston, Texas |
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| Abstract: | In recent works, we demonstrated the achievement of bicontinuous donor/acceptor morphologies by the addition of conjugated block copolymers to a blend of conjugated homopolymer donors and fullerene acceptors. However, the domain sizes resulting in experiments were much larger than those of interest for high‐performance organic solar cells. Moreover, a significant concentration of fullerene acceptors was present in the donor domains. Here, we utilize simulations to study the bicontinuous donor/acceptor morphologies that result for different parametric conditions. Using such results, we provide guidelines for how to blend polymer materials to give rise to bicontinuous phases with the smaller and more compositionally pure domains that are desirable for organic photovoltaic applications. Our results can be generalized to treat a large range of donor and acceptor monomers. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016 , 54, 884–895 |
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| Keywords: | bicontinuous microemulsion block copolymer compatibilizer block copolymers bulk heterojunction morphology conjugated polymers fullerenes morphology organic solar cell polymer/solvent blend phase behavior |
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