High-performance field-effect transistors with semiconducting-rich single-walled carbon nanotube bundle
- Author(s)
- Abu Taher Khan, Nan Wei, Otto Salmela, Kimmo Mustonen, Yongping Liao, Aqeel Hussain, Er Xiong Ding, Md Gius Uddin, Hua Jiang, Yutaka Ohno, Esko I. Kauppinen
- Abstract
Single-walled carbon nanotubes (SWCNTs), typically produced as bundles in floating catalyst chemical vapor deposition (FC-CVD), exhibit exceptional electronic properties, making them highly promising for high-performance electronics. This work examines the transport characteristics and electrical performance of field-effect transistors (FETs) fabricated from two high crystalline SWCNT bundle types: Small Bundle Small Diameter (SBSD) and Large Bundle Large Diameter (LBLD). SBSD and LBLD SWCNT bundles, synthesized via FC-CVD, had mean bundle diameters of 4.1 nm and 7.1 nm, and mean tube diameters of 1.4 nm and 1.9 nm, respectively. Despite electron diffraction revealing metallic fractions of 38 % for SBSD and 46.3 % for LBLD, interestingly a higher-than-expected fraction of FETs with 71.5 % for SBSD and 62 % for LBLD, demonstrated semiconducting behavior. Single SBSD SWCNT FETs achieved a mean charge carrier mobility of 2817 cm2V–1S−1, while single LBLD SWCNT FETs reached a mean value of 5378 cm2V–1S−1, among the highest reported. The mean mobility in single junction FETs decreased about fourfold to 737 cm2V−1s−1 for SBSD and threefold to 1732 cm2V−1s−1 for LBLD, compared to the single bundle FET. Both SBSD and LBLD SWCNT FETs achieved on-off ratios up to 108, highlighting their potential for advanced electronic applications.
- Organisation(s)
- Physics of Nanostructured Materials
- External organisation(s)
- Aalto University, Peking University, Dalian Polytechnic University, Nagoya University
- Journal
- Carbon
- Volume
- 239
- No. of pages
- 8
- ISSN
- 0008-6223
- DOI
- https://doi.org/10.1016/j.carbon.2025.120320
- Publication date
- 05-2025
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103011 Semiconductor physics, 210004 Nanomaterials
- Keywords
- ASJC Scopus subject areas
- General Chemistry, General Materials Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/5e268ffe-fe3a-4604-96d6-d63dd0997862