title: Rational design of benzotrithiophene-diketopyrrolopyrrole-containing donor-acceptor polymers for improved charge carrier transport.
abstract: Two new donor-acceptor polymers containing benzo[2,1-b:3,4-b':5,6-c'']trithiophene (BTT) as donor and diketopyrrolopyrrole (DPP) as acceptor are synthesized and applied in OFETs. By tuning the alkyl substituents of the polymers, a striking difference in packing order, thin-film arrangement, and charge carrier transport is observed. The polymer without substituents at the BTT exhibits a hole mobility two orders of magnitude higher than that with alkyl chains therein.
authors.affiliation: Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany.
authors.forename: Xin
authors.initials: X
authors.lastname: Guo
authors.forename: Sreenivasa Reddy
authors.initials: SR
authors.lastname: Puniredd
authors.forename: Martin
authors.initials: M
authors.lastname: Baumgarten
authors.forename: Wojciech
authors.initials: W
authors.lastname: Pisula
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
keywords: charge carrier transport; diketopyrrolopyrrole; donor-acceptor polymer; organic field-effect transistor; self-assembly