Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 35, Pages 18243-18250Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp4055022
Keywords
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Funding
- Natural Science Foundation of China [91123034, 61102046]
- Basic Research Programme of Jiangsu Province [BK2011364]
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In this work, a simple and effective method has been developed to selectively separate large-diameter semiconducting-SWCNTs (sc-SWCNTs) from commercial arc discharge SWCNTs using (9,9-dioctylfluorene-co-bithiophene) (F8T2). The role of solvents in the separation and dispersion processes was studied. It has been proved that sc-SWCNTs mixed in arc discharge SWCNTs can be selectively sorted by F8T2 in toluene, xylene, or m-xylene with the aid of sonication and centrifugation, and the molecular dynamic simulation also agrees with the experiment results. The resulted sc-SWCNTs dispersion solution was used as a printable ink to print thin-film transistors (TFTs) via an aerosol jet printer. The printed TFTs showed good uniformity and electrical properties with on current up to 10(-3) A, effective mobility up to 42.1 cm(2) V-1 s(-1) (+/- 1.2 cm(2) V-1 s(-1)), and on/off ratio of similar to 10(7) after only four cycles of repeated printing. In addition, all of the printed devices exhibited rapid photocurrent response to light irradiation.
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