2006 Volume 35 Issue 8 Pages 942-943
A series of β-octyl-substituted oligothiophenes from 6-mer to 41-mer was examined for active layers of organic filed-effect transistors. Upon spin-coating from chloroform solution, the 20-mer and the longer oligomers formed homogenous thin films composed of stacked lamella structures. Top-contact devices fabricated using these films showed good p-channel FET characteristics with mobilities of 10−3 cm2 V−1 s−1 which gradually increase with the extension of chain length.
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