title: Siloxane-terminated solubilizing side chains: bringing conjugated polymer backbones closer and boosting hole mobilities in thin-film transistors.
abstract: We introduce a novel siloxane-terminated solubilizing group and demonstrate its effectiveness as a side chain in an isoindigo-based conjugated polymer. An average hole mobility of 2.00 cm(2) V(-1) s(-1) (with a maximum mobility of 2.48 cm(2) V(-1) s(-1)), was obtained from solution-processed thin-film transistors, one of the highest mobilities reported to date. In contrast, the reference polymer with a branched alkyl side chain gave an average hole mobility of 0.30 cm(2) V(-1) s(-1) and a maximum mobility of 0.57 cm(2) V(-1) s(-1). This is largely explained by the polymer packing: our new polymer exhibited a π-π stacking distance of 3.58 Å, while the reference polymer showed a distance of 3.76 Å.
authors: Department of Chemical Engineering, Stanford University, Stanford, California 94305-5025, USA.
authors: Jianguo
authors: J
authors: Mei
authors: Do Hwan
authors: DH
authors: Kim
authors: Alexander L
authors: AL
authors: Ayzner
authors: Michael F
authors: MF
authors: Toney
authors: Zhenan
authors: Z
authors: Bao