Siloxane-Terminated Solubilizing Side Chains: Bringing Conjugated Polymer Backbones Closer and Boosting Hole Mobilities in Thin-Film Transistors

Jianguo Mei, Do Hwan Kim, Alexander L. Ayzner, Michael F. Toney, Zhenan Bao

Research output: Contribution to journalArticlepeer-review

543 Scopus citations

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. © 2011 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)20130-20133
Number of pages4
JournalJournal of the American Chemical Society
Volume133
Issue number50
DOIs
StatePublished - Dec 21 2011
Externally publishedYes

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