Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 14, Issue 16, Pages 4766-4778Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200701717
Keywords
field-effect transistors; printed electronics; semiconductors; thin films; thiophenes
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Printed organic thin-film transistors (OTFrs) have received great interests as potentially low-cost alternative to silicon technology for application in large-area, flexible, and ultra-low-cost electronics. One of the critical materials for TFTs is semiconductor, which has a dominant impact on the transistor properties. We review here the structural studies and design of thiophene-based polymer semiconductors with respect to solution processability, ambient stability, molecular self-organization, and field-effect transistor properties for OTFT applications. We show that through judicial monomer design, delicately controlled pi-conjugation, and strategically positioned pendant side-chain distribution, novel solution-processable thiophene polymer semiconductors with excellent self-organization ability to form extended lamellar pi-stacking orders can be developed. OTFTs using semiconductors of this nature processed in ambient conditions have provided excellent field-effect transistor properties.
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