Key factors for ultra-high on/off ratio thin-film transistors using as-grown carbon nanotube networks

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-06-01
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Mcode
Degree programme
Language
en
Pages
5
16291-16295
Series
RSC Advances, Volume 12, issue 25
Abstract
Approximately 30% of as-grown carbon nanotube (CNT) networks are metallic, usually leading to a trade-off between carrier mobility and on/off ratio in CNT thin-film transistors (TFTs). Figuring out the key factors of ultra-high on/off ratio in CNT TFTs should be considerably essential for the development of large-scale electronic devices in the future. Here ultra-high on/off ratios of 107-108 are realized for CNT TFTs with mobility of ∼500 cm2 V−1 s−1. We propose that one of the key factors to achieve the high on/off ratio is a clean CNT thin film without charge traps and doping due to residual dispersant used in conventional solution processes. Moreover, on/off ratio degradation under operation voltage is significantly suppressed by decreasing the diameter of CNTs.
Description
Funding Information: This work was supported by the National Natural Science Foundation of China (62125406), the National Key Research and Development Program of China (2021YFA1200013), the Key-Area Research and Development Program of Guangdong Province (2019B010934001), the Strategic Priority Research Program of Chinese Academy of Sciences (XDB30000000), the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (ZDBS-LY-JSC027), R&D promotion scheme funding international joint research promoted by National Institute of Information and Communications Technology (NICT), Japan, and the Aalto University MIDE program via the CNB-E project and partially supported by the Academy of Finland (Pr. No. 128445). Publisher Copyright: © 2022 The Royal Society of Chemistry
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Citation
Sun , Y , Li , P , Kauppinen , E I , Sun , D M & Ohno , Y 2022 , ' Key factors for ultra-high on/off ratio thin-film transistors using as-grown carbon nanotube networks ' , RSC Advances , vol. 12 , no. 25 , pp. 16291-16295 . https://doi.org/10.1039/d2ra02088b