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Wei Ma, John R. Tumbleston, Ming Wang, Eliot Gann, Fei Huang and Harald Ade Domain Purity, Miscibility, and Molecular Orientation at Donor/Acceptor Interfaces in High Performance Organic Solar Cells: Paths to Further Improvement Advanced Energy Materials 3

Version of Record online: 15 MAR 2013 | DOI: 10.1002/aenm.201200912

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The importance of domain purity and molecular orientation are investigated for solar cell devices based on naphtha[1,2-c:5,6-c]bis[1,2,5]thiadiazole (NT) or 2,1,3-benzothiadiazole based conjugated polymers. The results show that purer domains reduce bimolecular recombination. Molecular ordering of the polymer at the donor/acceptor interface is also observed and could be a critical parameter to explain high performance in organic solar cells. Both molecular ordering and domain purity should be widely considered to reveal structure–performance relationships.

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