Toward practical useful polymers for highly efficient solar cells via a random copolymer approach

C. Duan, K. Gao, J.J. van Franeker, F. Liu, M.M. Wienk, R.A.J. Janssen

Research output: Contribution to journalArticleAcademicpeer-review

88 Citations (Scopus)
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Abstract

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 random 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 solvents at room temperature.

Original languageEnglish
Pages (from-to)10782-10785
Number of pages4
JournalJournal of the American Chemical Society
Volume138
Issue number34
DOIs
Publication statusPublished - 31 Aug 2016

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