[Abstract]

The facile sorting of highly pure semiconducting single-walled carbon nanotubes (s-SWNTs) is still one of the challenging issues for the next-generation wearable electronic devices such as various opto-electric devices and field-effect transistors (FETs). Herein, we demonstrate the selective dispersion of high-purity s-SWNTs using indacenodithiophene-co-benzothiadiazole (IDT-BT), which is a state-of-the-art high-mobility conjugated polymer. By the selective wrapping of the IDT-BT copolymer, SWNTs of chiral indices (6, 5), (7, 5), (7, 6), (8, 4), (9, 4), (8, 6), (8, 7), (10, 5), (9, 7), (10, 6), (11, 1), and (13, 3) are sorted. Finally, the networked s-SWNT film formed by spin-coating is applied as an active layer of FETs that exhibited ambipolar characteristics with an average mobility of 2.28 cm²/V s in the p-channel and 2.10 cm²/V s in the n-channel. The ON/OFF ratios in both p- and n-channels are approximately 10⁵, which supports the high purity separation of s-SWNTs wrapped by IDT-BT.