Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 138, Issue 34, Pages 10782-10785Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b06418
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Funding
- European Commission [GA 604148]
- Dutch Polymer Institute [734]
- European Research Council [GA 339031]
- Ministry of Education, Culture and Science [024.001.035]
- DOE, Office of Basic Energy Sciences
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Using benzo[1,2-b:4,5-b']dithiophene and two matched 5,6-difluorobenzo[2,1,3]thiadiazole-based Monomers, we demonstrate that random-copolymerization of two electron deficient monomers, alternAting with one electron rich monomer, forms a successful approach to synthesize state-of-the-art semiconducting copolymers for organic solar cells. Over a range of compositions, these tandorn: copolymers provide impressive power conversion efficiencies (PCEs) of about 8.0%; higher than those of their binary parent polymers, and with little batch-to-batch variation. A PCE Over 8% could also be achieved when the active layer was deposited from nonhalogenated soWentS at room temperature.
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