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On the Origin of Small Band Gaps in Alternating Thiophene−Thienopyrazine Oligomers

✍ Scribed by Karsten, Bram P.; Viani, Lucas; Gierschner, Johannes; Cornil, Jérôme; Janssen, René A. J.


Book ID
120862873
Publisher
American Chemical Society
Year
2009
Tongue
English
Weight
510 KB
Volume
113
Category
Article
ISSN
1089-5639

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Three small band gap copolymers based on alternating dithiophene and thienopyrazine units were synthesized via Yamamoto coupling and applied in bulk heterojunction solar cells as donor together with PCBM ([6,6]-phenyl C 61 butyric acid methyl ester) as acceptor. The polymers have an optical band gap