POS5-1191
Alternative Solvent Engineering for Enhanced Yield of Semiconducting Single-Walled Carbon Nanotubes and High-Performance Field-Effect Transistors
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
minseo Baek (Kongju National University)
Co-Author(s)
Abstract
Semiconducting single-walled carbon nanotubes (s-SWNT) have attracted considerable attention as promising materials for next-generation electronic devices owing to their outstanding carrier mobility, excellent mechanical flexibility. However, raw SWNT consists of mixtures of semiconducting and metallic nanotubes, making the selective extraction of high-purity s-SWNT essential for achieving high-performance field-effect transistors (FET). Conjugated polymer-extraction(CPE) has emerged as one of the most effective approaches for selectively dispersing s-SWNT. In this study, we investigated the effects of various solvents on the selective sorting of s-SWCTs using CPE. Toluene was used as the reference solvent, while aromatic solvents and aliphatic solvents were explored as alternative solvents possessing different molecular structures and physicochemical properties. Compared with toluene, the alternative solvents significantly improved the extraction yield while preserving semiconducting purity at a comparable or even higher level, demonstrating their effectiveness for the selective sorting of s-SWNT. In contrast, one of solvents (aliphatic) showed a reduction in semiconducting purity despite its high extraction yield, suggesting that its solvent characteristics may adversely affect the selectivity of s-SWNT sorting. FET fabricated from the sorted s-SWNT exhibited typical p-type transport characteristics with an on/off current ratio of approximately 10⁴ and a field-effect mobility of approximately 20 cm² V⁻¹ s⁻¹. The device performance demonstrated that the alternative solvent strategy can produce semiconducting nanotube networks with sufficient electronic quality for transistor applications while simultaneously improving the production yield. This work provides practical guidelines for solvent engineering in CPE and offers an effective route toward scalable production of high-quality s-SWNT for next generation electronics devices
