Thiophene polymer semiconductors for organic thin-film transistors.
Printed organic thin-film transistors (OTFTs) 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.
Ong
Beng S
BS
Institute of Materials Research & Engineering, Agency of Science, Technology and Research, 3 Research Link, Singapore 117602. ongb@imre.a-star.edu.sg
Wu
Yiliang
Y
Li
Yuning
Y
Liu
Ping
P
Pan
Hualong
H