The synthesis of the novel donor-acceptor monomer 4,7-bis[(E)-2-(5-bromo-3-dodecylylthiophen-2-yl)ethenyl]-5,6-difluoro-2,1,3-benzothiadiazole (FBT-V2T2) is reported. Polymerization with 4,4′-ditetradecyl-5,5′-bistrimethylstannyl-2,2′-bithiophene afforded a highly crystalline polymer that aggregated strongly in solution. Polymer films were well ordered resulting in high performance field-effect transistors with low onset voltages, negligible hysteresis, high channel current on/off ratios, and peak hole mobilities of up to 0.5 cm2 V-1 s-1. Notably the transistors exhibited close to ideal behavior with extracted mobilities almost independent of gate of voltage.
Bibliographical noteFunding Information:
We thank the UKs Engineering and Physical Sciences Research Council (EPSRC) for financial support via the Doctoral Training Centre in Plastic Electronics EP/G037515/1 (AC, JG, MH) and the British Council (Grant Number 173601536).
© 2016 American Chemical Society.
- conjugated polymers
- donor-acceptor copolymer
- field-effect transistor
- organic semiconductors
ASJC Scopus subject areas
- Materials Science(all)