Selective sorting of semiconducting single-walled carbon nanotubes using thienylenevinylene-based conjugated polymers with high alkyl side-chain density
- 저자
- Min-Hye Lee, Seung-Hoon Lee, Jihong Kim, Sol Yi Lee, Dae-Hee Lim, Kyoungtae Hwang, Hansu Hwang, Yong Chae Jung, Yong-Young Noh, Dong-Yu Kim*
- 저널명
- Carbon, 125, 571-581 (2017)
- 년도
- 2017
- Link
- https://doi.org/10.1016/j.carbon.2017.09.068 163회 연결
[Abstract]
The demand for high-purity semiconducting single-walled carbon nanotubes (sc-SWNTs) has increased considerably with the aim of utilizing their superior properties in a range of future applications. Among post-sorting methods, conjugated polymers have been regarded as one of the candidates to selectively isolate sc-SWNTs with uniform electrical properties. Herein, we demonstrate the ability to selectively sort two types of SWNTs by the two polymers PCTV18T and PC12TV18T, which have different alkyl side-chain densities. PC12TV18T, with a high alkyl chain density, shows great sorting ability for both high-pressure carbon monoxide and plasma-torch-grown SWNTs with a weight ratio of almost 1:1 in toluene solution. In addition, it is found that PC12TV18T selectively sorts sc-SWNTs with the high purity. The chirality and diameters of the enriched sc-SWNTs are further confirmed by Raman spectroscopy and photoluminescence excitation/emission mapping. Finally, we fabricate bottom gate/bottom contact thin-film transistors using the enriched sc-SWNTs as semiconductors to verify the electrical performance. Devices with well-percolated sc-SWNT networks displayed p-dominant properties with average charge-carrier mobilities of 2.05 cm2 V−1 S−1 and 9.87 cm2 V−1 S−1 and on/off current ratios of approximately 104 and 105 for high-pressure carbon monoxide and plasma-torch-grown SWNTs, respectively.